GST.PRA / Gastar Exploration, Inc. 8.625% Series A Cumulative Preferred Stock - Pengajuan SECLaporan Tahunan, Pernyataan Proksi

Gastar Exploration, Inc. 8.625% Series A Cumulative Preferred Stock
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HINDI NA ACTIVE ANG SIMBONG ITO

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CIK 1431372
SEC Filings
All companies that sell securities in the United States must register with the Securities and Exchange Commission (SEC) and file reports on a regular basis. These reports include company annual reports (10K, 10Q), news updates (8K), investor presentations (found in 8Ks), insider trades (form 4), ownership reports (13D, and 13G), and reports related to the specific securities sold, such as registration statements and prospectus. This page shows recent SEC filings related to Gastar Exploration, Inc. 8.625% Series A Cumulative Preferred Stock
SEC Filings (Chronological Order)
Halaman ini menyediakan daftar lengkap dan kronologis dari Pengajuan SEC, tidak termasuk pengajuan kepemilikan yang kami sediakan di tempat lain.
February 14, 2020 SC 13G/A

GST / Gastar Exploration Inc. / RBC Global Asset Management Inc. - AMENDMENT NO. 1 Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G/A Under the Securities Exchange Act of 1934 (Amendment No. 1)* Gastar Exploration Inc. (Name of Issuer) Preferred Stock (Title of Class of Securities) 36729W608 (CUSIP Number) December 31, 2019 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which

February 14, 2019 SC 13G/A

GST / Gastar Exploration Inc. / FIR TREE INC. - GASTAR EXPLORATION INC. Passive Investment

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G/A Under the Securities Exchange Act of 1934 (Amendment No.1)* Gastar Exploration Inc. (Name of Issuer) Common Stock, par value $0.001 per share (Title of Class of Securities) 36729W202 (CUSIP Number) December 31, 2018 (Date of Event Which Requires Filing of This Statement) Check the appropriate box to designate the rule pursuan

February 14, 2019 SC 13G

GST / Gastar Exploration Inc. / RBC Global Asset Management Inc. Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934* Gastar Exploration Inc. (Name of Issuer) Preferred Stock (Title of Class of Securities) 36729W608 (CUSIP Number) December 31, 2018 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this Schedule is fi

January 22, 2019 15-12B

GST / Gastar Exploration Inc. FORM 15-12B

Form 15-12B UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 15 CERTIFICATION AND NOTICE OF TERMINATION OF REGISTRATION UNDER SECTION 12(g) OF THE SECURITIES EXCHANGE ACT OF 1934 OR SUSPENSION OF DUTY TO FILE REPORTS UNDER SECTIONS 13 AND 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934. Commission File Number 001-35211 GASTAR EXPLORATION INC. (Exact name of registrant as s

January 22, 2019 EX-10.2

Credit Agreement, dated as of January 22, 2019, by and between Gastar Midco Holdings LLC and AF V Energy I Holdings, L.P., as Lender.

Exhibit 10.2 EXECUTION VERSION CREDIT AGREEMENT dated as of January 22, 2019 between GASTAR MIDCO HOLDINGS LLC, as Borrower, and AF V ENERGY I HOLDINGS, L.P., as Lender TABLE OF CONTENTS Page Article I. Definitions 1 Section 1.01 Defined Terms1 Section 1.02 Terms Generally18 Section 1.03 Classification of Loans and Borrowings18 Article II. The Credits 18 Section 2.01 Accounting Terms; GAAP18 Secti

January 22, 2019 EX-2.1

Agreement and Plan of Merger, dated January 22, 2019, by and between Gastar Exploration Inc., Gastar Merger Sub LLC and Gastar Topco Holdings LLC.

Exhibit 2.1 EXECUTION VERSION AGREEMENT AND PLAN OF MERGER This AGREEMENT AND PLAN OF MERGER (“Agreement”), dated as of January 22, 2019 and effective as of 10:52 A.M. Eastern Standard Time on such date, is entered into by and among Gastar Exploration Inc., a Delaware corporation (“Gastar”), Gastar Topco Holdings LLC, a Delaware limited liability company (“Topco”), and Gastar Merger Sub LLC, a Del

January 22, 2019 EX-3.2

Certificate of Conversion of Gastar Exploration Inc. and Certificate of Formation of Gastar Exploration LLC, dated January 22, 2019.

Exhibit 3.2 STATE OF DELAWARE CERTIFICATE OF CONVERSION FROM A CORPORATION TO A LIMITED LIABILITY COMPANY PURSUANT TO SECTION 18-214 OF THE LIMITED LIABILITY ACT January 22, 2019 This Certificate of Conversion is executed by Gastar Exploration Inc., a Delaware corporation (herein, the “Corporation”), to convert the Corporation to a Delaware limited liability company (the “Limited Liability Company

January 22, 2019 EX-3.3

Limited Liability Company Agreement of Gastar Exploration LLC, dated January 22, 2109.

Exhibit 3.3 OPERATING AGREEMENT OF GASTAR EXPLORATION LLC This OPERATING AGREEMENT (this “Agreement”) of Gastar Exploration LLC (the “Company”) is made and entered into as of January 22, 2019, by Gastar Holdco LLC, a Delaware limited liability company (the “Sole Member”) and Gastar Topco Holdings LLC, a Delaware limited liability company (the “Manager”). RECITALS WHEREAS, Gastar Exploration Inc.,

January 22, 2019 EX-99.1

Gastar EXPLORATION successfully COMPLETES FINANCIAL RESTRUCTURING AND EMERGENCE FROM BANKRUPTCY

Exhibit 99.1 NEWS RELEASE Gastar EXPLORATION successfully COMPLETES FINANCIAL RESTRUCTURING AND EMERGENCE FROM BANKRUPTCY HOUSTON, January 22, 2019 - Gastar Exploration Inc. (OTCQB: GSTC) (the “Company” or “Gastar”) announced today that the conditions to effectiveness of its Chapter 11 Plan of Reorganization (as modified) (the “Plan”), which was confirmed by the United States Bankruptcy Court for

January 22, 2019 EX-3.1

Certificate of Merger of Gastar Exploration Inc. and Gastar Merger Sub LLC, dated January 22, 2019.

EX-3.1 3 gst-ex3162.htm EX-3.1 Exhibit 3.1 STATE OF DELAWARE CERTIFICATE OF MERGER OF DOMESTIC LIMITED LIABILITY COMPANY INTO A DOMESTIC CORPORATION Pursuant to Title 8, Sections 264(c) and 303 of the Delaware General Corporation Law and Title 6, Section 18-209 of the Delaware Limited Liability Company Act, Gastar Exploration Inc., a Delaware corporation (“Gastar”), hereby certifies the following

January 22, 2019 EX-10.1

among Gastar Exploration LLC as the Borrower, Gastar Holdco LLC, the guarantors from time to time party thereto, the financial institutions from time to time party thereto as lenders and Wilmington Trust, National Association, as the Administrative Agent.

Exhibit 10.1 EXECUTION VERSION AMENDED AND RESTATED CREDIT AGREEMENT dated as of January 22, 2019 among GASTAR EXPLORATION LLC, as Borrower, GASTAR HOLDCO LLC, as Holdings, The Guarantors from time to time Party Hereto, the Lenders Party Hereto, and WILMINGTON TRUST, NATIONAL ASSOCIATION, as Administrative Agent TABLE OF CONTENTS Page Article I. Definitions 2 Section 1.01 Defined Terms2 Section 1.

January 22, 2019 8-K

Changes in Control of Registrant, Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year, Entry into a Material Definitive Agreement, Termination of a Material Definitive Agreement, Material Modification to Rights of Security Holders, Unregistered Sales of Equity Securities, Financial Statements and Exhibits, Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant, Results of Operations and Financial Condition, Other Events

8-K 1 gst-8k20190118.htm 8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): January 22, 2019 GASTAR EXPLORATION INC. (Exact Name of Registrant as Specified in its Charter) DELAWARE 001-35211 38-3531640 (State or other jurisdiction

January 4, 2019 8-K

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): January 4, 2019 GASTAR EXPLORATION INC. (Exact Name of Registrant as Specified in its Charter) DELAWARE 001-35211 38-3531640 (State or other jurisdiction of incorporation) (Commission

January 4, 2019 EX-99.1

UNITED STATES BANKRUPTCY COURT CASE NAME: Gastar Exploration Inc., et al. PETITION DATE: 10/31/2018 CASE NUMBER: 18-36057 DISTRICT OF TEXAS: Southern District of Texas PROPOSED PLAN DATE: 12/31/2018 DIVISION: Houston MONTHLY OPERATING REPORT SUMMARY

EX-99.1 2 gst-ex9919.htm EX-99.1 Exhibit 99.1 UNITED STATES BANKRUPTCY COURT CASE NAME: Gastar Exploration Inc., et al. PETITION DATE: 10/31/2018 CASE NUMBER: 18-36057 DISTRICT OF TEXAS: Southern District of Texas PROPOSED PLAN DATE: 12/31/2018 DIVISION: Houston MONTHLY OPERATING REPORT SUMMARY FOR NOVEMBER 2018 ($ in thousands) NOVEMBER REVENUES (MOR-6) 7,643 0 0 0 0 INCOME BEFORE INT; DEPREC./TA

December 28, 2018 EX-2.1

Debtors’ Joint Prepackaged Plan (as modified) of Reorganization Pursuant to Chapter 11 of the Bankruptcy Code

EX-2.1 2 d682340dex21.htm EX-2.1 Exhibit 2.1 Case 18-36057 Document 238 Filed in TXSB on 12/12/18 Page 1 of 54 IN THE UNITED STATES BANKRUPTCY COURT FOR THE SOUTHERN DISTRICT OF TEXAS HOUSTON DIVISION § In re: § Chapter 11 § GASTAR EXPLORATION INC., et al.,1 § Case No. 18-36057 (MI) § Debtors. § (Jointly Administered) § DEBTORS’ JOINT PREPACKAGED PLAN (AS MODIFIED) OF REORGANIZATION PURSUANT TO CH

December 28, 2018 8-K

Financial Statements and Exhibits, Bankruptcy or Receivership

8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): December 20, 2018 GASTAR EXPLORATION INC. (Exact Name of Registrant as Specified in its Charter) DELAWARE 001-35211 38-3531640 (State or other jurisdiction of incorporation) (Comm

December 28, 2018 EX-99.1

Case 18-36057 Document 282 Filed in TXSB on 12/21/18 Page 1 of 53 IN THE UNITED STATES BANKRUPTCY COURT FOR THE SOUTHERN DISTRICT OF TEXAS HOUSTON DIVISION ENTERED 12/21/2018 § In re: § Chapter 11 § GASTAR EXPLORATION INC., et al.,1 § Case No. 18-360

EX-99.1 3 d682340dex991.htm EX-99.1 Exhibit 99.1 Case 18-36057 Document 282 Filed in TXSB on 12/21/18 Page 1 of 53 IN THE UNITED STATES BANKRUPTCY COURT FOR THE SOUTHERN DISTRICT OF TEXAS HOUSTON DIVISION ENTERED 12/21/2018 § In re: § Chapter 11 § GASTAR EXPLORATION INC., et al.,1 § Case No. 18-36057 (MI) § Debtors. § (Jointly Administered) § AMENDED ORDER APPROVING THE DEBTORS’ DISCLOSURE STATEME

December 21, 2018 S-8 POS

GST / Gastar Exploration Inc. S-8 POS

S-8 POS 1 d672271ds8pos.htm S-8 POS As filed with the Securities and Exchange Commission on December 21, 2018 SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 POST-EFFECTIVE AMENDMENT NO. 1 TO FORM S-8 NO. 333-219200 POST-EFFECTIVE AMENDMENT NO. 1 TO FORM S-8 NO. 333-197356 POST-EFFECTIVE AMENDMENT NO. 1 TO FORM S-8 NO. 333-193787 REGISTRATION STATEMENTS UNDER THE SECURITIES ACT OF 1933 G

December 21, 2018 S-8 POS

GST / Gastar Exploration Inc. S-8 POS

S-8 POS As filed with the Securities and Exchange Commission on December 21, 2018 SECURITIES AND EXCHANGE COMMISSION Washington, D.

December 21, 2018 S-8 POS

GST / Gastar Exploration Inc. S-8 POS

S-8 POS As filed with the Securities and Exchange Commission on December 21, 2018 SECURITIES AND EXCHANGE COMMISSION Washington, D.

December 21, 2018 POS AM

GST / Gastar Exploration Inc. POS AM

POS AM As filed with the Securities and Exchange Commission on December 21, 2018 Registration No.

December 18, 2018 424B3

169,933,626 Shares GASTAR EXPLORATION INC. Common Stock

424B3 Filed Pursuant to Rule 424(b)(3) Registration No. 333-217168 PROSPECTUS SUPPLEMENT NO. 22 (to Prospectus dated March 23, 2018) 169,933,626 Shares GASTAR EXPLORATION INC. Common Stock This prospectus supplement is being filed to update and supplement information contained in the prospectus dated March 23, 2018, relating to the resale or other disposition of our common stock par value $0.001 p

December 18, 2018 8-K

Material Modification to Rights of Security Holders, Other Events, Bankruptcy or Receivership

8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): December 12, 2018 GASTAR EXPLORATION INC. (Exact Name of Registrant as Specified in its Charter) DELAWARE 001-35211 38-3531640 (State or other jurisdiction of incorporation) (Comm

November 16, 2018 424B3

169,933,626 Shares GASTAR EXPLORATION INC. Common Stock

Filed Pursuant to Rule 424(b)(3) Registration No. 333-217168 PROSPECTUS SUPPLEMENT NO. 21 (to Prospectus dated March 23, 2018) 169,933,626 Shares GASTAR EXPLORATION INC. Common Stock This prospectus supplement is being filed to update and supplement information contained in the prospectus dated March 23, 2018, relating to the resale or other disposition of our common stock par value $0.001 per sha

November 16, 2018 EX-10.1

First Amendment to Restructuring Support Agreement by and among the Company and the Consenting Parties, dated as of November 16, 2018.

EX-10.1 2 gst-ex1018.htm EX-10.1 Exhibit 10.1 First Amendment to Restructuring Support Agreement This First Amendment (this “Amendment”), dated and effective as of November 16, 2018, is entered into by and among Gastar Exploration Inc. (the “Company”), Northwest Property Ventures LLC (“Northwest”), and each of the other undersigned parties (such undersigned parties, together with the Company and N

November 16, 2018 EX-99.3

IN THE UNITED STATES BANKRUPTCY COURT FOR THE SOUTHERN DISTRICT OF TEXAS HOUSTON DIVISION

EX-99.3 5 gst-ex9936.htm EX-99.3 IN THE UNITED STATES BANKRUPTCY COURT FOR THE SOUTHERN DISTRICT OF TEXAS HOUSTON DIVISION § In re: § Chapter 11 § GASTAR EXPLORATION INC., et al.,1 § Case No. 18-36057 (MI) § Debtors. § (Jointly Administered) § NOTICE OF (I) COMMENCEMENT OF PREPACKAGED CHAPTER 11 BANKRUPTCY CASES, (II) COMBINED HEARING ON THE DISCLOSURE STATEMENT, CONFIRMATION OF THE JOINT PREPACKA

November 16, 2018 EX-99.1

November 16, 2018

Exhibit 99.1 Supplemental Process Letter CONFIDENTIAL November 16, 2018 As you are aware, Gastar Exploration Inc. (“Gastar” or the “Company”) has commenced chapter 11 cases (the “Chapter 11 Cases”) in the United States Bankruptcy Court for the Southern District of Texas (the “Bankruptcy Court”) and, as has been publicly disclosed, is seeking confirmation of a prepackaged plan of reorganization (th

November 16, 2018 EX-99.2

Gastar EXPLORATION EXTENDS MARKETING PROCESS FOR RESTRUCTURING TRANSACTION PROPOSALS

Exhibit 99.2 NEWS RELEASE Gastar EXPLORATION EXTENDS MARKETING PROCESS FOR RESTRUCTURING TRANSACTION PROPOSALS HOUSTON, November 16, 2018 - Gastar Exploration Inc. (OTCQB: GSTC) (the “Company” or “Gastar”) announced today that it is extending its public marketing process for potential proposals to acquire the Company in conjunction with its court-supervised restructuring. The Company encourages al

November 16, 2018 8-K

Regulation FD Disclosure, Entry into a Material Definitive Agreement, Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): November 13, 2018 GASTAR EXPLORATION INC. (Exact Name of Registrant as Specified in its Charter) DELAWARE 001-35211 38-3531640 (State or other jurisdiction of incorporation) (Commissi

November 16, 2018 SC 13D/A

GST / Gastar Exploration Inc. / ARES MANAGEMENT LLC - SC 13D/A Activist Investment

SC 13D/A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D Under the Securities Exchange Act of 1934 (Amendment No. 6)* GASTAR EXPLORATION INC. (Name of Issuer) Common Stock, $0.001 par value (Title of Class of Securities) 36729W202 (CUSIP Number) Monica J. Shilling Proskauer Rose LLP 2049 Century Park East, Suite 3200 Los Angeles, California 90067 Tel: (310) 557

November 14, 2018 424B3

169,933,626 Shares GASTAR EXPLORATION INC. Common Stock

Filed Pursuant to Rule 424(b)(3) Registration No. 333-217168 PROSPECTUS SUPPLEMENT NO. 20 (to Prospectus dated March 23, 2018) 169,933,626 Shares GASTAR EXPLORATION INC. Common Stock This prospectus supplement is being filed to update and supplement information contained in the prospectus dated March 23, 2018, relating to the resale or other disposition of our common stock par value $0.001 per sha

November 14, 2018 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): November 14, 2018 GASTAR EXPLORATION INC. (Exact Name of Registrant as Specified in its Charter) DELAWARE 001-35211 38-3531640 (State or other jurisdiction of incorporation) (Commissi

November 14, 2018 EX-99.1

Gastar Exploration Announces Third Quarter 2018 Results

Exhibit 99.1 For Immediate Release NEWS RELEASE Contacts: Gastar Exploration Inc. Michael A. Gerlich, Chief Financial Officer 713-739-1800 / [email protected] Investor Relations Counsel: Lisa Elliott, Dennard▪Lascar Investor Relations 713-529-6600 / [email protected] Gastar Exploration Announces Third Quarter 2018 Results HOUSTON, November 14, 2018 - Gastar Exploration Inc. (OTC Pink: G

November 14, 2018 10-Q

GST / Gastar Exploration Inc. 10-Q (Quarterly Report)

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE QUARTERLY PERIOD ENDED September 30, 2018 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE TRANSITION PERIOD FROM TO Commission File Number: 001-35211 GASTAR EXPLORATI

November 8, 2018 NT 10-Q

GST / Gastar Exploration Inc. NT 10-Q

NT 10-Q 1 gst-nt10q20180930.htm NT 10-Q OMB APPROVAL OMB Number: 3235-0058 Expires: October 31, 2018 Estimated average burden hours per response 2.50 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 12b-25 NOTIFICATION OF LATE FILING (Check One) ☐ Form 10-K ☐ Form 20-F ☐ Form 11-K ☒ Form 10-Q ☐ Form 10-D ☐ Form N-SAR ☐ Form N-CSR For Period Ended: September 30, 2018 ☐ T

November 7, 2018 424B3

169,933,626 Shares GASTAR EXPLORATION INC. Common Stock

424B3 1 gst-424b3.htm 424B3 Filed Pursuant to Rule 424(b)(3) Registration No. 333-217168 PROSPECTUS SUPPLEMENT NO. 19 (to Prospectus dated March 23, 2018) 169,933,626 Shares GASTAR EXPLORATION INC. Common Stock This prospectus supplement is being filed to update and supplement information contained in the prospectus dated March 23, 2018, relating to the resale or other disposition of our common st

November 7, 2018 8-K

Material Modification to Rights of Security Holders, Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): November 1, 2018 GASTAR EXPLORATION INC. (Exact Name of Registrant as Specified in its Charter) DELAWARE 001-35211 38-3531640 (State or other jurisdiction of incorporation) (Commissio

November 7, 2018 EX-99.1

IN THE UNITED STATES BANKRUPTCY COURT FOR THE SOUTHERN DISTRICT OF TEXAS HOUSTON DIVISION

EX-99.1 2 gst-ex9916.htm EX-99.1 IN THE UNITED STATES BANKRUPTCY COURT FOR THE SOUTHERN DISTRICT OF TEXAS HOUSTON DIVISION § In re: § Chapter 11 § GASTAR EXPLORATION INC., et al.,1 § Case No. 18-36057 (MI) § Debtors. § (Jointly Administered) § § Re: Docket No. 24 INTERIM order (i) approving NOTIFICATION AND HEARING PROCEDURES FOR CERTAIN TRANSFERS OF AND DECLARATIONS OF WORTHLESSNESS WITH RESPECT

November 1, 2018 424B3

169,933,626 Shares GASTAR EXPLORATION INC. Common Stock

Filed Pursuant to Rule 424(b)(3) Registration No. 333-217168 PROSPECTUS SUPPLEMENT NO. 18 (to Prospectus dated March 23, 2018) 169,933,626 Shares GASTAR EXPLORATION INC. Common Stock This prospectus supplement is being filed to update and supplement information contained in the prospectus dated March 23, 2018, relating to the resale or other disposition of our common stock par value $0.001 per sha

November 1, 2018 8-K

Regulation FD Disclosure, Financial Statements and Exhibits, Triggering Events That Accelerate or Increase a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement, Other Events, Bankruptcy or Receivership

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): October 31, 2018 GASTAR EXPLORATION INC. (Exact Name of Registrant as Specified in its Charter) DELAWARE 001-35211 38-3531640 (State or other jurisdiction of incorporation) (Commissio

November 1, 2018 EX-99.1

Gastar Files for Chapter 11 to Implement Its Pre-Packaged Restructuring Plan

Exhibit 99.1 NEWS RELEASE Gastar Files for Chapter 11 to Implement Its Pre-Packaged Restructuring Plan HOUSTON, October 31, 2018 - Gastar Exploration Inc. (OTCQB: GSTC) (the “Company” or “Gastar”) today announced that it has commenced chapter 11 cases in the United States Bankruptcy Court for the Southern District of Texas (the “Bankruptcy Court”). The Company is seeking chapter 11 relief to imple

October 29, 2018 424B3

169,933,626 Shares GASTAR EXPLORATION INC. Common Stock

Filed Pursuant to Rule 424(b)(3) Registration No. 333-217168 PROSPECTUS SUPPLEMENT NO. 17 (to Prospectus dated March 23, 2018) 169,933,626 Shares GASTAR EXPLORATION INC. Common Stock This prospectus supplement is being filed to update and supplement information contained in the prospectus dated March 23, 2018, relating to the resale or other disposition of our common stock par value $0.001 per sha

October 29, 2018 EX-10.3

Employment Agreement Amendment, by and between Gastar Exploration Inc. and Stephen Roberts, executed October 25, 2018.

Exhibit 10.3 AMENDMENT NO. 1 TO EMPLOYMENT AGREEMENT THIS AMENDMENT NO. 1 (this “Amendment”), is dated as of October 22, 2018 (the “Effective Date”) and amends the Employment Agreement (the “Agreement”) by and between Stephen Roberts (“Executive”) and Gastar Exploration Inc. (the “Company”) effective as of September 7, 2018. Capitalized terms used and not otherwise defined herein shall have the me

October 29, 2018 EX-10.1

Restructuring Support Agreement.

Exhibit 10.1 Execution Version THIS RESTRUCTURING SUPPORT AGREEMENT IS NOT AN OFFER WITH RESPECT TO ANY SECURITIES OR A SOLICITATION OF ACCEPTANCES OF A CHAPTER 11 PLAN WITHIN THE MEANING OF SECTION 1125 OF THE BANKRUPTCY CODE. ANY SUCH OFFER OR SOLICITATION WILL COMPLY WITH ALL APPLICABLE SECURITIES LAWS AND/OR PROVISIONS OF THE BANKRUPTCY CODE. Nothing contained in thIS RESTRUCTURING SUPPORT AGR

October 29, 2018 EX-10.4

Employment Agreement Amendment, by and between Gastar Exploration Inc. and Michael A. Gerlich, dated October 25, 2018 (incorporated by reference to Exhibit 10.4 of the Current Report on Form 8-K filed with the SEC on October 29, 2018. File No. 001-35211).

Exhibit 10.4 AMENDMENT NO. 1 TO EMPLOYMENT AGREEMENT THIS AMENDMENT NO. 1 (this “Amendment”), is dated as of October 22, 2018 (the “Effective Date”) and amends the Employment Agreement (the “Agreement”) by and between Michael Gerlich (“Executive”) and Gastar Exploration Inc. (the “Company”) effective as of September 10, 2018. Capitalized terms used and not otherwise defined herein shall have the m

October 29, 2018 EX-10.5

Retention Bonus Agreement Amendment, by and between Gastar Exploration Inc. and Stephen Roberts, executed October 25, 2018.

Exhibit 10.5 GASTAR EXPLORATION INC. 10/25/2018 Stephen Roberts Re:Retention Bonus Agreement Amendment Dear Stephen: This letter agreement (this “Amendment”) amends that certain retention bonus agreement letter (the “Retention Bonus Agreement Letter”), dated August 31, 2018, by and between you and Gastar Exploration Inc. (the “Company”). Capitalized terms used and not defined herein have the meani

October 29, 2018 EX-10.2

Hedge Party Restructuring Support Agreement.

Exhibit 10.2 Execution Version THIS HEDGE PARTY RESTRUCTURING SUPPORT AGREEMENT IS NOT AN OFFER WITH RESPECT TO ANY SECURITIES OR A SOLICITATION OF ACCEPTANCES OF A CHAPTER 11 PLAN WITHIN THE MEANING OF SECTION 1125 OF THE BANKRUPTCY CODE. ANY SUCH OFFER OR SOLICITATION WILL COMPLY WITH ALL APPLICABLE SECURITIES LAWS AND/OR PROVISIONS OF THE BANKRUPTCY CODE. Nothing contained in thIS HEDGE PARTY R

October 29, 2018 EX-99.1

Gastar Announces Comprehensive Restructuring Plan to Be Implemented with Pre-Packaged Chapter 11 Cases

Exhibit 99.1 NEWS RELEASE Gastar Announces Comprehensive Restructuring Plan to Be Implemented with Pre-Packaged Chapter 11 Cases HOUSTON, October 26, 2018 - Gastar Exploration Inc. (OTCQB: GSTC) (the “Company” or “Gastar”) today announced that it has entered into a restructuring support agreement (the “RSA”) with the Company’s largest (and only) funded-debt creditors and largest common shareholder

October 29, 2018 8-K

Regulation FD Disclosure, Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Entry into a Material Definitive Agreement, Termination of a Material Definitive Agreement, Financial Statements and Exhibits, Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): October 25, 2018 GASTAR EXPLORATION INC. (Exact Name of Registrant as Specified in its Charter) DELAWARE 001-35211 38-3531640 (State or other jurisdiction of incorporation) (Commissio

October 29, 2018 EX-10.6

Retention Bonus Agreement Amendment, by and between Gastar Exploration Inc. and Michael A. Gerlich, executed October 25, 2018.

Exhibit 10.6 GASTAR EXPLORATION INC. October 25, 2018 Michael Gerlich Re: Retention Bonus Agreement Amendment Dear Mike: This letter agreement (this “Amendment”) amends that certain retention bonus agreement letter (the “Retention Bonus Agreement Letter”), dated August 31, 2018, by and between you and Gastar Exploration Inc. (the “Company”). Capitalized terms used and not defined herein have the m

October 29, 2018 EX-10.7

Retention Bonus Agreement Amendment, by and between Gastar Exploration Inc. and Jerry Schuyler, executed October 25, 2018.

Exhibit 10.7 GASTAR EXPLORATION INC. October 25, 2018 Jerry R. Schuyler Re:Retention Bonus Agreement Amendment Dear Jerry: This letter agreement (this “Amendment”) amends that certain retention bonus agreement letter (the “Retention Bonus Agreement Letter”), dated August 31, 2018, by and between you and Gastar Exploration Inc. (the “Company”). Capitalized terms used and not defined herein have the

October 29, 2018 SC 13D/A

GST / Gastar Exploration Inc. / ARES MANAGEMENT LLC - SC 13D/A Activist Investment

SC 13D/A 1 d639371dsc13da.htm SC 13D/A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D Under the Securities Exchange Act of 1934 (Amendment No. 5)* GASTAR EXPLORATION INC. (Name of Issuer) Common Stock, $0.001 par value (Title of Class of Securities) 36729W202 (CUSIP Number) Monica J. Shilling Proskauer Rose LLP 2049 Century Park East, Suite 3200 Los Angeles, C

September 17, 2018 424B3

169,933,626 Shares GASTAR EXPLORATION INC. Common Stock

Filed Pursuant to Rule 424(b)(3) Registration No. 333-217168 PROSPECTUS SUPPLEMENT NO. 16 (to Prospectus dated March 23, 2018) 169,933,626 Shares GASTAR EXPLORATION INC. Common Stock This prospectus supplement is being filed to update and supplement information contained in the prospectus dated March 23, 2018, relating to the resale or other disposition of our common stock par value $0.001 per sha

September 17, 2018 8-K

Entry into a Material Definitive Agreement, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): September 12, 2018 GASTAR EXPLORATION INC. (Exact Name of Registrant as Specified in its Charter) DELAWARE 001-35211 38-3531640 (State or other jurisdiction (Commission File Number) (

September 14, 2018 EX-99.25

EX-99.25

NOTIFICATION OF THE REMOVAL FROM LISTING AND REGISTRATION OF THE STATED SECURITIES NYSE AMERICAN LLC (the 'Exchange' or 'NYSE American') hereby notifies the Securities and Exchange Commission ('SEC') of its intention to remove the entire class of Common Stock (the 'Common Stock'), 8.

September 14, 2018 EX-99.25

EX-99.25

NOTIFICATION OF THE REMOVAL FROM LISTING AND REGISTRATION OF THE STATED SECURITIES NYSE AMERICAN LLC (the 'Exchange' or 'NYSE American') hereby notifies the Securities and Exchange Commission ('SEC') of its intention to remove the entire class of Common Stock (the 'Common Stock'), 8.

September 14, 2018 EX-99.25

EX-99.25

NOTIFICATION OF THE REMOVAL FROM LISTING AND REGISTRATION OF THE STATED SECURITIES NYSE AMERICAN LLC (the 'Exchange' or 'NYSE American') hereby notifies the Securities and Exchange Commission ('SEC') of its intention to remove the entire class of Common Stock (the 'Common Stock'), 8.

September 13, 2018 424B3

169,933,626 Shares GASTAR EXPLORATION INC. Common Stock

Filed Pursuant to Rule 424(b)(3) Registration No. 333-217168 PROSPECTUS SUPPLEMENT NO. 15 (to Prospectus dated March 23, 2018) 169,933,626 Shares GASTAR EXPLORATION INC. Common Stock This prospectus supplement is being filed to update and supplement information contained in the prospectus dated March 23, 2018, relating to the resale or other disposition of our common stock par value $0.001 per sha

September 13, 2018 EX-10.1

Employment Agreement, by and between Gastar Exploration Inc. and Jerry R. Schuyler, executed September 9, 2018.

EX-10.1 2 gst-ex1018.htm EX-10.1 Exhibit 10.1 EXECUTION VERSION AMENDED AND RESTATED EMPLOYMENT AGREEMENT This AMENDED AND RESTATED EMPLOYMENT AGREEMENT (this “Agreement”) is hereby entered into as of August 31, 2018 between Gastar Exploration Inc. (the “Company”) and Jerry R. Schuyler (“Executive”). This Agreement shall be effective as of the date of execution by the parties (the “Effective Date”

September 13, 2018 EX-10.3

Employment Agreement, by and between Gastar Exploration Inc. and Stephen Roberts, executed September 7, 2018.

Exhibit 10.3 EXECUTION VERSION EMPLOYMENT AGREEMENT This EMPLOYMENT AGREEMENT (this "Agreement") is hereby entered into as of August 31, 2018 between Gastar Exploration Inc. (the "Company") and Stephen Roberts ("Executive"). This Agreement shall be effective as of the date of execution by the parties (the "Effective Date"). WHEREAS, the Company desires to continue to employ Executive, and Executiv

September 13, 2018 EX-10.2

Employment Agreement, by and between Gastar Exploration Inc. and Michael A. Gerlich, executed September 10, 2018.

Exhibit 10.2 EXECUTION VERSION EMPLOYMENT AGREEMENT This EMPLOYMENT AGREEMENT (this "Agreement") is hereby entered into as of August 31, 2018 between Gastar Exploration Inc. (the "Company") and Michael A. Gerlich ("Executive"). This Agreement shall be effective as of the date of execution by the parties (the "Effective Date"). WHEREAS, the Company desires to continue to employ Executive, and Execu

September 13, 2018 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): September 7, 2018 GASTAR EXPLORATION INC. (Exact Name of Registrant as Specified in its Charter) DELAWARE 001-35211 38-3531640 (State or other jurisdiction (Commission File Number) (I

September 10, 2018 424B3

169,933,626 Shares GASTAR EXPLORATION INC. Common Stock

Filed Pursuant to Rule 424(b)(3) Registration No. 333-217168 PROSPECTUS SUPPLEMENT NO. 14 (to Prospectus dated March 23, 2018) 169,933,626 Shares GASTAR EXPLORATION INC. Common Stock This prospectus supplement is being filed to update and supplement information contained in the prospectus dated March 23, 2018, relating to the resale or other disposition of our common stock par value $0.001 per sha

September 10, 2018 EX-99.1

Gastar Exploration Commences Trading on OTCQB

Exhibit 99.1 NEWS RELEASE Contacts: Gastar Exploration Inc. Michael A. Gerlich, Chief Financial Officer 713-739-1800 / [email protected] Investor Relations Counsel: Lisa Elliott / [email protected] Dennard-Lascar Investor Relations: 713-529-6600 Gastar Exploration Commences Trading on OTCQB HOUSTON, September 7, 2018 – Gastar Exploration Inc. (OTCQB: GSTC) (“Gastar” and the “Company”) t

September 10, 2018 EX-99.2

Gastar Exploration’s Two Preferred Stock Issues Commences Trading on OTCQB

Exhibit 99.2 NEWS RELEASE Contacts: Gastar Exploration Inc. Michael A. Gerlich, Chief Financial Officer 713-739-1800 / [email protected] Investor Relations Counsel: Lisa Elliott / [email protected] Dennard-Lascar Investor Relations: 713-529-6600 Gastar Exploration’s Two Preferred Stock Issues Commences Trading on OTCQB HOUSTON, September 7, 2018 – Gastar Exploration Inc. (OTCQB: GSTC) (

September 10, 2018 8-K

Regulation FD Disclosure, Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): September 7, 2018 GASTAR EXPLORATION INC. (Exact Name of Registrant as Specified in its Charter) DELAWARE 001-35211 38-3531640 (State or other jurisdiction (Commission File Number) (I

September 6, 2018 424B3

169,933,626 Shares GASTAR EXPLORATION INC. Common Stock

Filed Pursuant to Rule 424(b)(3) Registration No. 333-217168 PROSPECTUS SUPPLEMENT NO. 13 (to Prospectus dated March 23, 2018) 169,933,626 Shares GASTAR EXPLORATION INC. Common Stock This prospectus supplement is being filed to update and supplement information contained in the prospectus dated March 23, 2018, relating to the resale or other disposition of our common stock par value $0.001 per sha

September 6, 2018 EX-99.1

Gastar Exploration Announces Suspension of Trading on the NYSE American Exchange and Expected Commencement of Over-the-Counter Trading

EX-99.1 2 gst-ex9916.htm EX-99.1 Exhibit 99.1 NEWS RELEASE Contacts: Gastar Exploration Inc. Michael A. Gerlich, Chief Financial Officer 713-739-1800 / [email protected] Investor Relations Counsel: Lisa Elliott / [email protected] Dennard-Lascar Investor Relations: 713-529-6600 Gastar Exploration Announces Suspension of Trading on the NYSE American Exchange and Expected Commencement of

September 6, 2018 8-K

Regulation FD Disclosure, Notice of Delisting or Failure to Satisfy a Continued Listing Rule or Standard; Transfer of Listing, Financial Statements and Exhibits

8-K 1 gst-8k20180906.htm 8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): September 6, 2018 GASTAR EXPLORATION INC. (Exact Name of Registrant as Specified in its Charter) DELAWARE 001-35211 38-3531640 (State or other jurisdictio

September 5, 2018 424B3

169,933,626 Shares GASTAR EXPLORATION INC. Common Stock

Filed Pursuant to Rule 424(b)(3) Registration No. 333-217168 PROSPECTUS SUPPLEMENT NO. 12 (to Prospectus dated March 23, 2018) 169,933,626 Shares GASTAR EXPLORATION INC. Common Stock This prospectus supplement is being filed to update and supplement information contained in the prospectus dated March 23, 2018, relating to the resale or other disposition of our common stock par value $0.001 per sha

September 5, 2018 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers

8-K 1 gst-8k20180829.htm 8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): August 29, 2018 GASTAR EXPLORATION INC. (Exact Name of Registrant as Specified in its Charter) DELAWARE 001-35211 38-3531640 (State or other jurisdiction

August 29, 2018 424B3

169,933,626 Shares GASTAR EXPLORATION INC. Common Stock

424B3 1 gst-424b3.htm 424B3 Filed Pursuant to Rule 424(b)(3) Registration No. 333-217168 PROSPECTUS SUPPLEMENT NO. 11 (to Prospectus dated March 23, 2018) 169,933,626 Shares GASTAR EXPLORATION INC. Common Stock This prospectus supplement is being filed to update and supplement information contained in the prospectus dated March 23, 2018, relating to the resale or other disposition of our common st

August 29, 2018 8-K

Regulation FD Disclosure, Notice of Delisting or Failure to Satisfy a Continued Listing Rule or Standard; Transfer of Listing, Financial Statements and Exhibits

8-K 1 gst-8k20180828.htm 8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): August 28, 2018 GASTAR EXPLORATION INC. (Exact Name of Registrant as Specified in its Charter) DELAWARE 001-35211 38-3531640 (State or other jurisdiction

August 29, 2018 EX-99.1

Gastar Exploration Announces Notification of NYSE American Continued Listing Deficiency

EX-99.1 2 gst-ex9916.htm EX-99.1 Exhibit 99.1 NEWS RELEASE Contacts: Gastar Exploration Inc. Michael A. Gerlich, Chief Financial Officer 713-739-1800 / [email protected] Investor Relations Counsel: Lisa Elliott / [email protected] Dennard-Lascar Investor Relations: 713-529-6600 Gastar Exploration Announces Notification of NYSE American Continued Listing Deficiency HOUSTON, August 29, 20

August 21, 2018 EX-99.1

Tudor, Pickering, Holt & Co. Securities, Inc. | Tudor, Pickering, Holt & Co. Advisors, LLC | Members FINRA/SIPC

CONFIDENTIAL August 21, 2018 Thank you for your interest in a potential transaction (a “Transaction”) with Gastar Exploration Inc.

August 21, 2018 8-K

Regulation FD Disclosure, Financial Statements and Exhibits

8-K 1 gst-8k20180821.htm 8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): August 21, 2018 GASTAR EXPLORATION INC. (Exact Name of Registrant as Specified in its Charter) DELAWARE 001-35211 38-3531640 (State or other jurisdiction

August 14, 2018 424B3

169,933,626 Shares GASTAR EXPLORATION INC. Common Stock

424B3 1 gst-424b3.htm 424B3 Filed Pursuant to Rule 424(b)(3) Registration No. 333-217168 PROSPECTUS SUPPLEMENT NO. 10 (to Prospectus dated March 23, 2018) 169,933,626 Shares GASTAR EXPLORATION INC. Common Stock This prospectus supplement is being filed to update and supplement information contained in the prospectus dated March 23, 2018, relating to the resale or other disposition of our common st

August 14, 2018 8-K

Regulation FD Disclosure, Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits

8-K 1 gst-8k20180813.htm 8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): August 13, 2018 GASTAR EXPLORATION INC. (Exact Name of Registrant as Specified in its Charter) DELAWARE 001-35211 38-3531640 (State or other jurisdiction

August 14, 2018 EX-99.1

Gastar Exploration Announces Appointment of New Independent Directors

Exhibit 99.1 NEWS RELEASE Contacts: Gastar Exploration Inc. Michael A. Gerlich, Chief Financial Officer 713-739-1800 / [email protected] Investor Relations Counsel: Lisa Elliott / [email protected] Dennard-Lascar Investor Relations: 713-529-6600 Gastar Exploration Announces Appointment of New Independent Directors HOUSTON, August 13, 2018 – Gastar Exploration Inc. (NYSE American: GST) (

August 9, 2018 424B3

169,933,626 Shares GASTAR EXPLORATION INC. Common Stock

Filed Pursuant to Rule 424(b)(3) Registration No. 333-217168 PROSPECTUS SUPPLEMENT NO. 9 (to Prospectus dated March 23, 2018) 169,933,626 Shares GASTAR EXPLORATION INC. Common Stock This prospectus supplement is being filed to update and supplement information contained in the prospectus dated March 23, 2018, relating to the resale or other disposition of our common stock par value $0.001 per shar

August 9, 2018 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

8-K 1 gst-8k20180809.htm 8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): August 9, 2018 GASTAR EXPLORATION INC. (Exact Name of Registrant as Specified in its Charter) DELAWARE 001-35211 38-3531640 (State or other jurisdiction o

August 9, 2018 EX-99.1

Gastar Exploration Announces Second Quarter 2018 Results

Exhibit 99.1 For Immediate Release NEWS RELEASE Contacts: Gastar Exploration Inc. Michael A. Gerlich, Chief Financial Officer 713-739-1800 / [email protected] Investor Relations Counsel: Lisa Elliott, Dennard▪Lascar Investor Relations 713-529-6600 / [email protected] Gastar Exploration Announces Second Quarter 2018 Results HOUSTON, August 9, 2018 - Gastar Exploration Inc. (NYSE American

August 9, 2018 10-Q

GST / Gastar Exploration Inc. 10-Q (Quarterly Report)

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE QUARTERLY PERIOD ENDED June 30, 2018 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE TRANSITION PERIOD FROM TO Commission File Number: 001-35211 GASTAR EXPLORATION IN

August 1, 2018 424B3

169,933,626 Shares GASTAR EXPLORATION INC. Common Stock

424B3 1 gst-424b3.htm 424B3 Filed Pursuant to Rule 424(b)(3) Registration No. 333-217168 PROSPECTUS SUPPLEMENT NO. 8 (to Prospectus dated March 23, 2018) 169,933,626 Shares GASTAR EXPLORATION INC. Common Stock This prospectus supplement is being filed to update and supplement information contained in the prospectus dated March 23, 2018, relating to the resale or other disposition of our common sto

August 1, 2018 8-K

Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): August 1, 2018 GASTAR EXPLORATION INC. (Exact Name of Registrant as Specified in its Charter) DELAWARE 001-35211 38-3531640 (State or other jurisdiction (Commission File Number) (IRS

August 1, 2018 EX-99.1

Gastar Exploration Announces Efforts to Consider Restructuring Transaction Proposals

Exhibit 99.1 For Immediate Release NEWS RELEASE Contacts: Gastar Exploration Inc. Michael A. Gerlich, Chief Financial Officer 713-739-1800 / [email protected] Investor Relations Counsel: Lisa Elliott, Dennard▪Lascar Investor Relations 713-529-6600 / [email protected] Gastar Exploration Announces Efforts to Consider Restructuring Transaction Proposals HOUSTON, August 1, 2018 - Gastar Exp

July 23, 2018 424B3

169,933,626 Shares GASTAR EXPLORATION INC. Common Stock

424B3 1 gst-424b3.htm 424B3 Filed Pursuant to Rule 424(b)(3) Registration No. 333-217168 PROSPECTUS SUPPLEMENT NO. 7 (to Prospectus dated March 23, 2018) 169,933,626 Shares GASTAR EXPLORATION INC. Common Stock This prospectus supplement is being filed to update and supplement information contained in the prospectus dated March 23, 2018, relating to the resale or other disposition of our common sto

July 23, 2018 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): July 20, 2018 GASTAR EXPLORATION INC. (Exact Name of Registrant as Specified in its Charter) DELAWARE 001-35211 38-3531640 (State or other jurisdiction (Commission File Number) (IRS E

July 20, 2018 SC 13D/A

GST / Gastar Exploration Inc. / ARES MANAGEMENT LLC - SC 13D/A Activist Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D Under the Securities Exchange Act of 1934 (Amendment No. 4)* GASTAR EXPLORATION INC. (Name of Issuer) Common Stock, $0.001 par value (Title of Class of Securities) 36729W202 (CUSIP Number) Monica J. Shilling Proskauer Rose LLP 2049 Century Park East, Suite 3200 Los Angeles, California 90067 Tel: (310) 557-2900 Fax

July 20, 2018 EX-10

Summary of Potential Restructuring Terms and Conditions for Gastar Exploration Inc.

Exhibit 10 Draft - 7/20/2018 For Discussion Purposes Only Subject to FRE 408 and Similar Rules Summary of Potential Restructuring Terms and Conditions for Gastar Exploration Inc.

July 6, 2018 424B3

169,933,626 Shares GASTAR EXPLORATION INC. Common Stock

424B3 1 d908955d424b3.htm 424B3 Filed Pursuant to Rule 424(b)(3) Registration No. 333-217168 PROSPECTUS SUPPLEMENT NO. 6 (to Prospectus dated March 23, 2018) 169,933,626 Shares GASTAR EXPLORATION INC. Common Stock This prospectus supplement is being filed to update and supplement information contained in the prospectus dated March 23, 2018, relating to the resale or other disposition of our common

July 6, 2018 EX-10.2

Second Supplemental Indenture, dated as of June 29, 2018, between Gastar Exploration Inc. and Wilmington Trust, National Association, as trustee and collateral trustee.

EX-10.2 Exhibit 10.2 SECOND SUPPLEMENTAL INDENTURE SECOND SUPPLEMENTAL INDENTURE (this “Supplemental Indenture”), dated as of June 29, 2018, among Gastar Exploration Inc. (or its successor, the “Company”), Northwest Property Ventures LLC (the “Guarantor”), and Wilmington Trust, National Association, a national banking association, as Trustee (the “Trustee”) and as Collateral Trustee (the “Collater

July 6, 2018 EX-10.1

Amendment No. 4 and Limited Waiver to Third Amended and Restated Credit Agreement, dated as of June 29, 2018, among Gastar Exploration Inc., as borrower, certain subsidiaries of borrower, as guarantors, the lenders party thereto and Wilmington Trust, National Association, as administrative agent.

EX-10.1 2 d908955dex101.htm EX-10.1 Exhibit 10.1 AMENDMENT NO. 4 AND LIMITED WAIVER TO CREDIT AGREEMENT This AMENDMENT NO. 4 and LIMITED WAIVER TO THIRD AMENDED AND RESTATED CREDIT AGREEMENT (this “Agreement”), dated as of June 29, 2018, is by and among GASTAR EXPLORATION INC., a Delaware corporation (the “Borrower”), certain subsidiary guarantors of the Borrower party hereto (the “Guarantors”, an

July 6, 2018 8-K

Entry into a Material Definitive Agreement, Financial Statements and Exhibits

8-K 1 d908955d8k.htm 8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): June 29, 2018 GASTAR EXPLORATION INC. (Exact Name of Registrant as Specified in its Charter) DELAWARE 001-35211 38-3531640 (State or other jurisdiction of inc

June 28, 2018 424B3

169,933,626 Shares GASTAR EXPLORATION INC. Common Stock

424B3 1 gst-424b3.htm 424B3 Filed Pursuant to Rule 424(b)(3) Registration No. 333-217168 PROSPECTUS SUPPLEMENT NO. 5 (to Prospectus dated March 23, 2018) 169,933,626 Shares GASTAR EXPLORATION INC. Common Stock This prospectus supplement is being filed to update and supplement information contained in the prospectus dated March 23, 2018, relating to the resale or other disposition of our common sto

June 28, 2018 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Entry into a Material Definitive Agreement, Financial Statements and Exhibits, Submission of Matters to a Vote of Security Holders

8-K 1 gst-8k20180626.htm 8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): June 26, 2018 GASTAR EXPLORATION INC. (Exact Name of Registrant as Specified in its Charter) DELAWARE 001-35211 38-3531640 (State or other jurisdiction (C

June 28, 2018 EX-10.1

Form of Amended and Restated Indemnification Agreement (incorporated by reference to Exhibit 10.1 to the Registrant’s Current Report on Form 8-K filed with the Commission on June 29, 2018).

EX-10.1 2 gst-ex1017.htm EX-10.1 Exhibit 10.1 FORM OF INDEMNIFICATION AGREEMENT This Indemnification Agreement (this “Agreement”), dated as of , is by and between Gastar Exploration Inc., a Delaware corporation (the “Company”) and (the “Indemnitee”). WHEREAS, Indemnitee is willing to serve as a director and/or officer of the Company on the condition that the Indemnitee is indemnified and covered u

June 11, 2018 424B3

169,933,626 Shares GASTAR EXPLORATION INC. Common Stock

424B3 1 gst-424b3.htm 424B3 Filed Pursuant to Rule 424(b)(3) Registration No. 333-217168 PROSPECTUS SUPPLEMENT NO. 4 (to Prospectus dated March 23, 2018) 169,933,626 Shares GASTAR EXPLORATION INC. Common Stock This prospectus supplement is being filed to update and supplement information contained in the prospectus dated March 23, 2018, relating to the resale or other disposition of our common sto

June 11, 2018 EX-99.1

Gastar Exploration Inc. Declares Monthly Cash Dividends on 8.625% Series A Preferred Stock and 10.75% Series B Preferred Stock

EX-99.1 2 gst-ex9916.htm EX-99.1 Exhibit 99.1 NEWS RELEASE Contacts: Gastar Exploration Inc. Michael A. Gerlich, Chief Financial Officer 713-739-1800 / [email protected] Investor Relations Counsel: Lisa Elliott / [email protected] Dennard Lascar Investor Relations: 713-529-6600 Gastar Exploration Inc. Declares Monthly Cash Dividends on 8.625% Series A Preferred Stock and 10.75% Series B

June 11, 2018 8-K

GST / Gastar Exploration Inc. 8-K (Current Report)

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): June 11, 2018 GASTAR EXPLORATION INC. (Exact Name of Registrant as Specified in its Charter) DELAWARE 001-35211 38-3531640 (State or other jurisdiction of incorporation) (Commission F

May 21, 2018 DEF 14A

GST / Gastar Exploration Inc. DEF 14A

DEF 14A 1 gst-def14a20171231.htm DEF 14A UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, For Use of the Commission Only (as permitted by Ru

May 14, 2018 8-K

Regulation FD Disclosure, Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits

8-K 1 gst-8k20180514.htm 8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): May 8, 2018 GASTAR EXPLORATION INC. (Exact Name of Registrant as Specified in its Charter) DELAWARE 001-35211 38-3531640 (State or other jurisdiction (Com

May 14, 2018 424B3

169,933,626 Shares GASTAR EXPLORATION INC. Common Stock

424B3 1 gst-424b3.htm 424B3 Filed Pursuant to Rule 424(b)(3) Registration No. 333-217168 PROSPECTUS SUPPLEMENT NO. 3 (to Prospectus dated March 23, 2018) 169,933,626 Shares GASTAR EXPLORATION INC. Common Stock This prospectus supplement is being filed to update and supplement information contained in the prospectus dated March 23, 2018, relating to the resale or other disposition of our common sto

May 14, 2018 EX-99.1

Gastar Exploration Announces New Independent Director

EX-99.1 2 gst-ex99122.htm EX-99.1 Exhibit 99.1 NEWS RELEASE Contacts: Gastar Exploration Inc. Michael A. Gerlich, Chief Financial Officer 713-739-1800 / [email protected] Investor Relations Counsel: Lisa Elliott / [email protected] Dennard-Lascar Investor Relations: 713-529-6600 Gastar Exploration Announces New Independent Director HOUSTON, May 14, 2018 – Gastar Exploration Inc. (NYSE A

May 10, 2018 EX-99.1

Gastar Exploration Announces First Quarter 2018 Results

EX-99.1 2 gst-ex9916.htm EX-99.1 Exhibit 99.1 For Immediate Release NEWS RELEASE Contacts: Gastar Exploration Inc. Michael A. Gerlich, Chief Financial Officer 713-739-1800 / [email protected] Investor Relations Counsel: Lisa Elliott, Dennard▪Lascar Investor Relations 713-529-6600 / [email protected] Gastar Exploration Announces First Quarter 2018 Results HOUSTON, May 10, 2018 - Gastar E

May 10, 2018 EX-99.2

Gastar Exploration Inc. Declares Monthly Cash Dividends on 8.625% Series A Preferred Stock and 10.75% Series B Preferred Stock

Exhibit 99.2 NEWS RELEASE Contacts: Gastar Exploration Inc. Michael A. Gerlich, Chief Financial Officer 713-739-1800 / [email protected] Investor Relations Counsel: Lisa Elliott / [email protected] Dennard Lascar Investor Relations: 713-529-6600 Gastar Exploration Inc. Declares Monthly Cash Dividends on 8.625% Series A Preferred Stock and 10.75% Series B Preferred Stock HOUSTON, May 10,

May 10, 2018 8-K

GST / Gastar Exploration Inc. 8-K (Current Report)

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): May 10, 2018 GASTAR EXPLORATION INC. (Exact Name of Registrant as Specified in its Charter) DELAWARE 001-35211 38-3531640 (State or other jurisdiction of incorporation) (Commission Fi

May 10, 2018 424B3

169,933,626 Shares GASTAR EXPLORATION INC. Common Stock

Filed Pursuant to Rule 424(b)(3) Registration No. 333-217168 PROSPECTUS SUPPLEMENT NO. 2 (to Prospectus dated March 23, 2018) 169,933,626 Shares GASTAR EXPLORATION INC. Common Stock This prospectus supplement is being filed to update and supplement information contained in the prospectus dated March 23, 2018, relating to the resale or other disposition of our common stock par value $0.001 per shar

May 10, 2018 10-Q

GST / Gastar Exploration Inc. 10-Q (Quarterly Report)

10-Q 1 gst-10q20180331.htm 10-Q UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE QUARTERLY PERIOD ENDED March 31, 2018 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE TRANSITION PERIOD FROM TO Commission File Number

April 9, 2018 424B3

169,933,626 Shares GASTAR EXPLORATION INC. Common Stock

424B3 1 gst-424b3.htm 424B3 Filed Pursuant to Rule 424(b)(3) Registration No. 333-217168 PROSPECTUS SUPPLEMENT NO. 1 (to Prospectus dated March 23, 2018) 169,933,626 Shares GASTAR EXPLORATION INC. Common Stock This prospectus supplement is being filed to update and supplement information contained in the prospectus dated March 23, 2018, relating to the resale or other disposition of our common sto

April 9, 2018 8-K

Regulation FD Disclosure, Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): April 9, 2018 GASTAR EXPLORATION INC. (Exact Name of Registrant as Specified in its Charter) DELAWARE 001-35211 38-3531640 (State or other jurisdiction of incorporation) (Commission F

April 9, 2018 EX-99.1

Gastar Exploration Inc. Declares Special Cash Dividends on 8.625% Series A Preferred Stock and 10.75% Series B Preferred Stock

Exhibit 99.1 NEWS RELEASE Contacts: Gastar Exploration Inc. Michael A. Gerlich, Chief Financial Officer 713-739-1800 / [email protected] Investor Relations Counsel: Lisa Elliott / [email protected] Dennard Lascar Investor Relations: 713-529-6600 Gastar Exploration Inc. Declares Special Cash Dividends on 8.625% Series A Preferred Stock and 10.75% Series B Preferred Stock HOUSTON, April 9

March 26, 2018 424B3

169,933,626 Shares Common Stock

424B3 1 d543087d424b3.htm 424B3 Table of Contents Filed Pursuant to Rule 424(b)(3) Registration No. 333-217168 PROSPECTUS 169,933,626 Shares Common Stock This prospectus relates to the resale or other disposition of up to 169,933,626 shares of our common stock par value $0.001 per share, which may be offered for sale from time to time by the selling stockholders named in this prospectus. We are no

March 15, 2018 POS AM

GST / Gastar Exploration Inc. POS AM

POS AM Table of Contents Sure As filed with the Securities and Exchange Commission on March 15, 2018 Registration No.

March 15, 2018 EX-99.1

Gastar Exploration Announces Fourth Quarter and Full-Year 2017 Results

EX-99.1 2 gst-ex99111.htm EX-99.1 For Immediate Release NEWS RELEASE Contacts: Gastar Exploration Inc. Michael A. Gerlich, Chief Financial Officer 713-739-1800 / [email protected] Investor Relations Counsel: Lisa Elliott, Dennard▪Lascar Investor Relations 713-529-6600 / [email protected] Gastar Exploration Announces Fourth Quarter and Full-Year 2017 Results HOUSTON, March 15, 2018 - Gas

March 15, 2018 8-K

GST / Gastar Exploration Inc. 8-K (Current Report)

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): March 15, 2018 (March 15, 2018) GASTAR EXPLORATION INC. (Exact Name of Registrant as Specified in its Charter) DELAWARE 001-35211 38-3531640 (State or other jurisdiction of incorporat

March 15, 2018 10-K

GST / Gastar Exploration Inc. 10-K (Annual Report)

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K (Mark One) ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2017 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number: 001-35

March 15, 2018 EX-99.1

Report of Wright & Company, Inc. dated January 24, 2018.

Exhibit 99.1 January 24, 2018 Gastar Exploration Inc. 1331 Lamar, Suite 650 Houston, TX 77010 Attention: Mr. J. Russell Porter SUBJECT:Evaluation of Oil and Gas Reserves To the Interests of Gastar Exploration Inc. In Certain Properties Located in Oklahoma Pursuant to the Requirements of the Securities and Exchange Commission Effective January 1, 2018 Job 17.1918 At the request of Gastar Exploratio

March 15, 2018 EX-12.2

Computation of Ratio of Earnings to Fixed Charges and Preferred Stock Dividends

Exhibit 12.2 STATEMENT OF COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES AND PREFERRED STOCK DIVIDENDS (Unaudited) For the Years Ended December 31, 2017 2016 2015 2014 2013 (in thousands, except ratios) Earnings (Loss): Net income (loss) $ (46,755 ) $ (89,061 ) $ (459,507 ) $ 50,953 $ 49,342 Add: Fixed Charges 46,291 38,522 34,796 32,138 16,598 Add: Amortization of capitalized interest 1,216 1,

March 15, 2018 EX-12.1

Computation of Ratio of Earnings to Fixed Charges

Exhibit 12.1 STATEMENT OF COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES (Unaudited) For the Years Ended December 31, 2017 2016 2015 2014 2013 (in thousands, except ratios) Earnings (Loss): Net income (loss) $ (46,755 ) $ (89,061 ) $ (459,507 ) $ 50,953 $ 49,342 Add: Fixed Charges 46,291 38,522 34,796 32,138 16,598 Add: Amortization of capitalized interest 1,216 1,389 896 594 883 Less: Interest

March 15, 2018 EX-21.1

Subsidiaries of Gastar Exploration Inc.

EX-21.1 4 gst-ex2118.htm EX-21.1 Exhibit 21.1 GASTAR EXPLORATION INC. Subsidiary List as of March 15, 2018 None.

March 15, 2018 EX-99.2

Unaudited Pro Forma Financial Information.

Exhibit 99.2 UNAUDITED PRO FORMA FINANCIAL INFORMATION On January 23, 2018, Gastar Exploration Inc. (the “Company” or “Gastar”) entered into a definitive agreement of sale and purchase (the “Sale Agreement”), by and between the Company and Revolution Resources, LLC to divest its interest in the West Edmund Hunton Lime Unit (“WEHLU”) and adjacent undeveloped acreage for a cash purchase price of app

March 5, 2018 EX-99.2

UNAUDITED PRO FORMA FINANCIAL INFORMATION

Exhibit 99.2 UNAUDITED PRO FORMA FINANCIAL INFORMATION On January 23, 2018, Gastar Exploration Inc. (the “Company” or “Gastar”) entered into a definitive agreement of sale and purchase (the “Sale Agreement”), by and between the Company and Revolution Resources, LLC to divest its interest in the West Edmond Hunton Lime Unit (“WEHLU”) and adjacent undeveloped acreage for a cash purchase price of $10

March 5, 2018 8-K

Regulation FD Disclosure, Financial Statements and Exhibits, Completion of Acquisition or Disposition of Assets

8-K 1 gst-8k20180228.htm 8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): March 5, 2018 (February 28, 2018) GASTAR EXPLORATION INC. (Exact Name of Registrant as Specified in its Charter) DELAWARE 001-35211 38-3531640 (State or o

March 5, 2018 EX-99.1

Gastar Exploration Closes Sale of Non-Core Acreage in Oklahoma

Exhibit 99.1 NEWS RELEASE Contacts: Gastar Exploration Inc. Michael A. Gerlich, Chief Financial Officer 713-739-1800 / [email protected] Investor Relations Counsel: Lisa Elliott / [email protected] Dennard Lascar Investor Relations: 713-529-6600 Gastar Exploration Closes Sale of Non-Core Acreage in Oklahoma HOUSTON, February 28, 2018 – Gastar Exploration Inc. (NYSE American: GST) (“Gast

February 27, 2018 EX-99.1

Gastar Exploration Announces Senior Management Change

gst-ex9916.htm NEWS RELEASE Contacts: Gastar Exploration Inc. Michael A. Gerlich, Chief Financial Officer 713-739-1800 / [email protected] Investor Relations Counsel: Lisa Elliott / [email protected] Dennard-Lascar Investor Relations: 713-529-6600 Gastar Exploration Announces Senior Management Change HOUSTON, February 27, 2017 ? Gastar Exploration Inc. (NYSE American: GST) (?Gastar? or t

February 27, 2018 EX-10.2

Employment Agreement entered into by and between Gastar Exploration Inc. and Jerry R. Schuyler, dated February 27, 2018 (incorporated by reference to Exhibit 10.2 of the Current Report on Form 8-K filed with the SEC on February 27, 2018. File No. 001-32714).

gst-ex10251.htm Exhibit 10.2 EXECUTION VERSION EMPLOYMENT AGREEMENT This EMPLOYMENT AGREEMENT (this ?Agreement?) is hereby entered into on February 27, 2018, between Gastar Exploration Inc. (the ?Company?) and Jerry R. Schuyler (?Executive?). This Agreement shall be effective as of the date of execution by the parties (the ?Effective Date?). 1.Employment. The Company shall employ Executive, and Ex

February 27, 2018 EX-10.1

Separation and Release Agreement, by Gastar Exploration Inc. and J. Russell Porter, dated February 26, 2018 (incorporated by reference to Exhibit 10.1 of the Current Report on Form 8-K filed with the SEC on February 27, 2018. File No. 001-32714).

gst-ex10122.htm Exhibit 10.1 EXECUTION VERSION SEPARATION AND RELEASE AGREEMENT THIS SEPARATION AND RELEASE AGREEMENT (the ?Agreement?) is made as of this 26th day of February, 2018, by Gastar Exploration Inc. (the ?Company?), and J. Russell Porter (the ?Executive?). WHEREAS, the Executive serves as the President and Chief Executive Officer of the Company; WHEREAS, the Executive and the Company ar

February 27, 2018 8-K

Regulation FD Disclosure, Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits

8-K 1 gst-8k20180227.htm 8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): February 27, 2018 (February 26, 2018) GASTAR EXPLORATION INC. (Exact Name of Registrant as Specified in its Charter) DELAWARE 001-35211 38-3531640 (State

February 15, 2018 EX-99.1

Gastar Exploration Announces 68% Increase in Year-End 2017 Proved Reserves, 2017 4th Quarter Production, Operations Update, 2018 Capital Budget and Production Guidance

EX-99.1 2 gst-ex9916.htm EX-99.1 Exhibit 99.1 NEWS RELEASE Contacts: Gastar Exploration Inc. J. Russell Porter, Chief Executive Officer 713-739-1800 / [email protected] Investor Relations Counsel: Lisa Elliott / [email protected] Dennard-Lascar Investor Relations: 713-529-6600 Gastar Exploration Announces 68% Increase in Year-End 2017 Proved Reserves, 2017 4th Quarter Production, Operati

February 15, 2018 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

gst-8k20180215.htm UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): February 15, 2018 (February 15, 2018) GASTAR EXPLORATION INC. (Exact Name of Registrant as Specified in its Charter) DELAWARE 001-35211 38-3531640 (State or other j

February 14, 2018 SC 13G/A

GST / Gastar Exploration Inc. / Wilks Brothers, LLC - SCHEDULE 13G AMENDMENT NO. 2 Passive Investment

Schedule 13G Amendment No. 2 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 2)* Gastar Exploration Inc. (Name of Issuer) Common Stock (Title of Class of Securities) 36729W202 (CUSIP Number) December 31, 2017 (Date of Event which Requires Filing of this Statement) Check the appropriate box to designate th

February 14, 2018 SC 13G

GST / Gastar Exploration Inc. / FIR TREE INC. - GASTAR EXPLORATION INC. Passive Investment

SC 13G 1 p18-0487sc13g.htm GASTAR EXPLORATION INC. SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. )* Gastar Exploration Inc. (Name of Issuer) Common Stock, par value $0.001 per share (Title of Class of Securities) 36729W202 (CUSIP Number) December 31, 2017 (Date of Event Which Requires Filing of This Statement) Check

February 14, 2018 EX-99.1

IDENTIFICATION OF MEMBERS OF THE GROUP

EX-99.1 Exhibit 99.1 IDENTIFICATION OF MEMBERS OF THE GROUP Dan H. Wilks Staci Wilks Wilks Brothers, LLC Page 9 of 9

January 29, 2018 8-K

Regulation FD Disclosure, Entry into a Material Definitive Agreement, Financial Statements and Exhibits

8-K 1 gst-8k20180123.htm 8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): January 29, 2018 (January 23, 2018) GASTAR EXPLORATION INC. (Exact Name of Registrant as Specified in its Charter) DELAWARE 001-35211 38-3531640 (State or

January 29, 2018 EX-2.1

Agreement of Sale and Purchase, dated January 23, 2018, by and between Gastar Exploration Inc. and Revolution Resources, LLC (incorporated by reference to Exhibit 2.1 to the Company’s Current Report on Form 8-K filed on January 29, 2018).

gst-ex216.htm Exhibit 2.1 Execution Version AGREEMENT OF SALE AND PURCHASE BY AND BETWEEN GASTAR EXPLORATION INC., AS SELLER AND REVOLUTION RESOURCES, LLC AS PURCHASER January 23, 2018 TABLE OF CONTENTS ARTICLE 1 PURCHASE AND SALE 1 Section 1.1 Purchase and Sale 1 Section 1.2 Assets 1 Section 1.3 Excluded Assets 3 Section 1.4 Effective Time; Proration of Costs and Revenues 4 Section 1.5 Delivery a

January 29, 2018 EX-99.1

Gastar Exploration Signs DEFINITIVE Agreement to SELL non-core RESERVES and acreage in Oklahoma Transaction Provides Additional Capital for STACK Acreage Development

Exhibit 99.1 For Immediate Release NEWS RELEASE Contacts: Gastar Exploration Inc. J. Russell Porter, President & Chief Executive Officer 713-739-1800 / [email protected] Investor Relations Counsel: Lisa Elliott, Dennard Lascar Investor Relations: 713-529-6600 / [email protected] Gastar Exploration Signs DEFINITIVE Agreement to SELL non-core RESERVES and acreage in Oklahoma Transaction Pr

December 22, 2017 POS AM

GST / Gastar Exploration Inc. POS AM

POS AM 1 d484469dposam.htm POS AM As filed with the Securities and Exchange Commission on December 22, 2017 Registration No. 333-217168 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Post-Effective Amendment No. 1 to FORM S-3 on FORM S-1 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 Gastar Exploration Inc. (Exact name of registrant as specified in its charter) De

November 8, 2017 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

8-K 1 gst-8k20171108.htm 8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): November 8, 2017 (November 8, 2017) GASTAR EXPLORATION INC. (Exact Name of Registrant as Specified in its Charter) DELAWARE 001-35211 38-3531640 (State or

November 8, 2017 EX-99.1

Gastar Exploration reports third Quarter 2017 Results

EX-99.1 2 gst-ex9919.htm EX-99.1 Exhibit 99.1 For Immediate Release NEWS RELEASE Contacts: Gastar Exploration Inc. Michael A. Gerlich, Chief Financial Officer 713-739-1800 / [email protected] Investor Relations Counsel: Lisa Elliott, Dennard▪Lascar Associates: 713-529-6600 / [email protected] Gastar Exploration reports third Quarter 2017 Results HOUSTON, November 8, 2017 - Gastar Explor

November 8, 2017 10-Q

GST / Gastar Exploration Inc. 10-Q (Quarterly Report)

10-Q 1 gst-10q20170930.htm 10-Q UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE QUARTERLY PERIOD ENDED September 30, 2017 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE TRANSITION PERIOD FROM TO Commission File Nu

October 11, 2017 8-K

Gastar Exploration 8-K (Current Report/Significant Event)

gst-8k20171011.htm UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): October 11, 2017 (October 11, 2017) GASTAR EXPLORATION INC. (Exact Name of Registrant as Specified in its Charter) DELAWARE 001-35211 38-3531640 (State or other jur

October 11, 2017 EX-99.1

Gastar Exploration UPDATES THIRD Quarter and Full year 2017 Production GUIDANCE

EX-99.1 2 gst-ex9916.htm EX-99.1 Exhibit 99.1 For Immediate Release NEWS RELEASE Contacts: Gastar Exploration Inc. Michael A. Gerlich, Chief Financial Officer 713-739-1800 / [email protected] Investor Relations Counsel: Lisa Elliott, Dennard Lascar Investor Relations: 713-529-6600 / [email protected] Gastar Exploration UPDATES THIRD Quarter and Full year 2017 Production GUIDANCE HOUSTON

September 19, 2017 8-K

Gastar Exploration 8-K (Current Report/Significant Event)

gst-8k20170918.htm UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): September 19, 2017 (September 18, 2017) GASTAR EXPLORATION INC. (Exact Name of Registrant as Specified in its Charter) DELAWARE 001-35211 38-3531640 (State or other

September 19, 2017 EX-10.1

Amendment No. 3 to Third Amended and Restated Credit Agreement, executed on September 18, 2017, among Gastar Exploration Inc., as borrower, certain subsidiaries of borrower, as guarantors, the lenders party thereto and Wilmington Trust, National Association, as administrative agent (incorporated by reference to Exhibit 10.1 of the Current Report on Form 8-K filed with the SEC on September 19, 2017. File No. 001-35211).

gst-ex1016.htm Exhibit 10.1 Execution Version Amendment No. 3 TO CREDIT AGREEMENT This AMENDMENT NO. 3 TO THIRD AMENDED AND RESTATED CREDIT AGREEMENT (this ?Amendment?), dated as of September 18, 2017, is by and among GASTAR EXPLORATION INC., a Delaware corporation (?Borrower?), certain subsidiary guarantors of the Borrower party hereto (the ?Guarantors? and together with Borrower, the ?Credit Par

September 13, 2017 8-K

Gastar Exploration 8-K (Current Report/Significant Event)

gst-8k20170912.htm UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): September 13, 2017 (September 12, 2017) GASTAR EXPLORATION INC. (Exact Name of Registrant as Specified in its Charter) DELAWARE 001-35211 38-3531640 (State or other

September 13, 2017 EX-10.1

Fourth Amendment to Amended and Restated Gastar Exploration Inc. Employee Change of Control Severance Plan, dated September 12, 2017 (incorporated by reference to Exhibit 10.1 of the Current Report on Form 8-K filed with SEC on September 13, 2017. File No. 001-35211).

gst-ex1016.htm Exhibit 10.1 FOURTH AMENDMENT TO AMENDED AND RESTATED GASTAR EXPLORATION INC. EMPLOYEE CHANGE OF CONTROL SEVERANCE PLAN The GASTAR EXPLORATION INC. EMPLOYEE CHANGE OF CONTROL SEVERANCE PLAN (as previously amended, restated and renamed) (the “Plan”) is hereby amended effective as of March 10, 2015 pursuant to the authorization and direction of the Board of Directors of GASTAR EXPLORA

August 3, 2017 EX-99.1

Gastar Exploration Announces SECOND Quarter 2017 Results

gst-ex9917.htm Exhibit 99.1 For Immediate Release NEWS RELEASE Contacts: Gastar Exploration Inc. Michael A. Gerlich, Chief Financial Officer 713-739-1800 / [email protected] Investor Relations Counsel: Lisa Elliott, Dennard?Lascar Associates: 713-529-6600 / [email protected] Gastar Exploration Announces SECOND Quarter 2017 Results HOUSTON, August 3, 2017 - Gastar Exploration Inc. (NYSE

August 3, 2017 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition, Other Events

8-K 1 gst-8k20170803.htm 8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): August 3, 2017 (August 3, 2017) GASTAR EXPLORATION INC. (Exact Name of Registrant as Specified in its Charter) DELAWARE 001-35211 38-3531640 (State or oth

August 3, 2017 EX-10.7

Amendment No. 2 to Third Amended and Restated Credit Agreement, dated as of August 2, 2017, among Gastar Exploration Inc., as borrower, certain subsidiaries of borrower, as guarantors, the lenders party thereto and Wilmington Trust, National Association, as administrative agent (incorporated by reference to Exhibit 10.7 of the Quarterly Report on Form 10-Q filed with the SEC on August 3, 2017. File No. 001-35211).

EX-10.7 3 gst-ex107155.htm EX-10.7 Exhibit 10.7 Amendment No. 2 TO CREDIT AGREEMENT This AMENDMENT NO. 2 TO THIRD AMENDED AND RESTATED CREDIT AGREEMENT (this “Amendment”), dated as of August 2, 2017, is by and among GASTAR EXPLORATION INC., a Delaware corporation (“Borrower”), certain subsidiary guarantors of the Borrower party hereto (the “Guarantors” and together with Borrower, the “Credit Parti

August 3, 2017 EX-3.3

First Certificate of Amendment of Amended and Restated Certificate of Incorporation of Gastar Exploration Inc. dated July 24, 2017 (incorporated by reference to Exhibit 3.3 of the Quarterly Report on Form 10-Q filed with the SEC on August 3, 2017. File No. 001-35211).

EX-3.3 2 gst-ex33498.htm EX-3.3 Exhibit 3.3 FIRST CERTIFICATE OF AMENDMENT OF AMENDED AND RESTATED CERTIFICATE OF INCORPORATION OF GASTAR EXPLORATION INC. July 24, 2017 Gastar Exploration Inc., a corporation organized and existing under the laws of the State of Delaware (the “Corporation”), DOES HEREBY CERTIFY: FIRST: That the Board of Directors of the Corporation duly adopted resolutions proposin

August 3, 2017 10-Q

GST / Gastar Exploration Inc. 10-Q (Quarterly Report)

10-Q 1 gst-10q20170630.htm 10-Q UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE QUARTERLY PERIOD ENDED June 30, 2017 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE TRANSITION PERIOD FROM TO Commission File Number:

July 11, 2017 8-K

Regulation FD Disclosure, Financial Statements and Exhibits

8-K 1 gst-8k20170710.htm 8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): July 11, 2017 (July 10, 2017) GASTAR EXPLORATION INC. (Exact Name of Registrant as Specified in its Charter) DELAWARE 001-35211 38-3531640 (State or other

July 11, 2017 EX-99.1

Gastar Exploration Inc. Declares Monthly Cash Dividend on 8.625% Series A Preferred Stock and 10.75% Series B Preferred Stock

EX-99.1 2 gst-ex9916.htm EX-99.1 For Immediate Release NEWS RELEASE Contacts: Gastar Exploration Inc. J. Russell Porter, Chief Executive Officer 713-739-1800 / [email protected] Investor Relations Counsel: Lisa Elliott / [email protected] Dennard-Lascar Associates: 713-529-6600 Gastar Exploration Inc. Declares Monthly Cash Dividend on 8.625% Series A Preferred Stock and 10.75% Series B P

July 7, 2017 EX-10.2

First Amendment to the Gastar Exploration Inc. Amended and Restated Long-Term Incentive Plan (incorporated by reference to Exhibit 10.2 of the Registration Statement on Form S-8 filed with the SEC on July 7, 2017. File No. 333-219200).

EX-10.2 Exhibit 10.2 FIRST AMENDMENT TO THE AMENDED AND RESTATED GASTAR EXPLORATION INC. LONG-TERM INCENTIVE PLAN THIS FIRST AMENDMENT (the ?First Amendment?) to the Amended and Restated Gastar Exploration Inc. Long-Term Incentive Plan, as amended from time to time (the ?Plan?), is made by Gastar Exploration Inc. (the ?Company?). W I T N E S S E T H: WHEREAS, the Company previously adopted the Pla

July 7, 2017 S-8

Gastar Exploration S-8

S-8 As filed with the Securities and Exchange Commission on July 7, 2017 Registration No.

June 27, 2017 EX-99.1

Gastar Exploration IS ADDED TO THE RUSSELL 2000 INDEX

gst-ex99115.htm For Immediate Release NEWS RELEASE Contacts: Gastar Exploration Inc. J. Russell Porter, President & Chief Executive Officer 713-739-1800 / [email protected] Investor Relations Counsel: Lisa Elliott, Dennard▪Lascar Associates: 713-529-6600 / [email protected] Gastar Exploration IS ADDED TO THE RUSSELL 2000 INDEX HOUSTON, June 26, 2017 - Gastar Exploration Inc. (NYSE MKT: G

June 27, 2017 8-K

Regulation FD Disclosure, Financial Statements and Exhibits, Submission of Matters to a Vote of Security Holders

8-K 1 gst-8k20170627.htm 8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): June 27, 2017 (June 26, 2017) GASTAR EXPLORATION INC. (Exact Name of Registrant as Specified in its Charter) DELAWARE 001-35211 38-3531640 (State or other

June 13, 2017 EX-24.1

EX-24.1

POWER OF ATTORNEY FOR EXECUTING FORM ID, FORMS 3, FORMS 4 AND FORMS 5, FORM 144 AND SCHEDULE 13D AND SCHEDULE 13G The undersigned hereby constitutes and appoints Michael A.

June 12, 2017 EX-99.1

Gastar Exploration Inc. Declares Monthly Cash Dividend on 8.625% Series A Preferred Stock and 10.75% Series B Preferred Stock

gst-ex9916.htm For Immediate Release NEWS RELEASE Contacts: Gastar Exploration Inc. J. Russell Porter, Chief Executive Officer 713-739-1800 / [email protected] Investor Relations Counsel: Lisa Elliott / [email protected] Dennard-Lascar Associates: 713-529-6600 Gastar Exploration Inc. Declares Monthly Cash Dividend on 8.625% Series A Preferred Stock and 10.75% Series B Preferred Stock HOU

June 12, 2017 8-K

Regulation FD Disclosure, Financial Statements and Exhibits

8-K 1 gst-8k20170609.htm 8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): June 12, 2017 (June 9, 2017) GASTAR EXPLORATION INC. (Exact Name of Registrant as Specified in its Charter) DELAWARE 001-35211 38-3531640 (State or other

June 5, 2017 8-K

Gastar Exploration 8-K (Current Report/Significant Event)

8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): June 5, 2017 (June 5, 2017) GASTAR EXPLORATION INC. (Exact name of registrant as specified in its charter) Commission File No. 001-35211 Incorporated under the laws of I.R.S. Empl

June 5, 2017 EX-99.1

GASTAR EXPLORATION ANNOUNCES ADDITION OF STEPHEN P. ROBERTS AS SENIOR VICE PRESIDENT & CHIEF OPERATING OFFICER

EX-99.1 Exhibit 99.1 For Immediate Release NEWS RELEASE Contacts: Gastar Exploration Inc. J. Russell Porter, President & Chief Executive Officer 713-739-1800 / [email protected] Investor Relations Counsel: Lisa Elliott, Dennard?Lascar Associates: 713-529-6600 / [email protected] GASTAR EXPLORATION ANNOUNCES ADDITION OF STEPHEN P. ROBERTS AS SENIOR VICE PRESIDENT & CHIEF OPERATING OFFICER

May 30, 2017 CORRESP

Gastar Exploration ESP

CORRESP 1 filename1.htm GASTAR EXPLORATION INC. 1331 Lamar Street, Suite 650 Houston, Texas 77010 Phone: (713) 739-1800 • Fax: (713) 739-0458 May 30, 2017 Via EDGAR United States Securities and Exchange Commission Division of Corporation Finance 100 F Street, N.E. Washington, D.C. 20549 Attention: H. Roger Schwall, Assistant Director Re: Request for Acceleration of Effectiveness of Registration St

May 25, 2017 SC 13D/A

GST / Gastar Exploration Inc. / ARES MANAGEMENT LLC - SC 13D/A Activist Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D Under the Securities Exchange Act of 1934 (Amendment No. 3)* GASTAR EXPLORATION INC. (Name of Issuer) Common Stock, $0.001 par value (Title of Class of Securities) 36729W202 (CUSIP Number) Monica J. Shilling Proskauer Rose LLP 2049 Century Park East, Suite 3200 Los Angeles, California 90067 Tel: (310) 557-2900 Fax

May 22, 2017 EX-12.1

STATEMENT OF COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES Three Months Ended March 31, 2017 For the Years Ended December 31, 2016 2015 2014 2013 2012 (in thousands, except ratios) Earnings (Loss): Net income (loss) $ (18,698 ) $ (89,061 ) $ (459

EX-12.1 Exhibit 12.1 STATEMENT OF COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES (Unaudited) Three Months Ended March 31, 2017 For the Years Ended December 31, 2016 2015 2014 2013 2012 (in thousands, except ratios) Earnings (Loss): Net income (loss) $ (18,698 ) $ (89,061 ) $ (459,507 ) $ 50,953 $ 49,342 $ (153,791 ) Add: Fixed Charges 11,472 38,522 34,796 32,138 16,598 2,340 Add: Amortization o

May 22, 2017 EX-12.2

STATEMENT OF COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES AND PREFERRED STOCK DIVIDENDS Three Months Ended March 31, 2017 For the Years Ended December 31, 2016 2015 2014 2013 2012 (in thousands, except ratios) Earnings (Loss): Net income (loss)

EX-12.2 Exhibit 12.2 STATEMENT OF COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES AND PREFERRED STOCK DIVIDENDS (Unaudited) Three Months Ended March 31, 2017 For the Years Ended December 31, 2016 2015 2014 2013 2012 (in thousands, except ratios) Earnings (Loss): Net income (loss) $ (18,698 ) $ (89,061 ) $ (459,507 ) $ 50,953 $ 49,342 $ (153,791 ) Add: Fixed Charges 11,472 38,522 34,796 32,138 16

May 22, 2017 S-3/A

Gastar Exploration S-3/A

S-3/A Table of Contents As filed with the Securities and Exchange Commission on May 22, 2017 Registration No.

May 22, 2017 DEF 14A

Second Amendment to the Gastar Exploration Inc. Amended and Restated Long-Term Incentive Plan (incorporated by reference to Annex A to the Registrant’s Definitive Proxy Statement on Schedule 14A, filed May 22, 2017. File No. 001-35211).

gst-def14a20170627.htm UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ? Filed by a Party other than the Registrant ? Check the appropriate box: ? Preliminary Proxy Statement ? Confidential, For Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ?

May 22, 2017 CORRESP

Gastar Exploration ESP

CORRESP 1 filename1.htm GASTAR EXPLORATION INC. 1331 Lamar Street, Suite 650 Houston, Texas 77010 May 22, 2017 H. Roger Schwall Assistant Director United States Securities and Exchange Commission Division of Corporation Finance Office of Natural Resources 100 F Street, N.E. Washington, D.C. 20549-3561 Re: Gastar Exploration Inc. Registration Statement on Form S-3 Filed April 6, 2017 File No. 333-2

May 10, 2017 15-12B

Gastar Exploration 15-12B

15-12B UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 15 CERTIFICATION AND NOTICE OF TERMINATION OF REGISTRATION UNDER SECTION 12(g) OF THE SECURITIES EXCHANGE ACT OF 1934 OR SUSPENSION OF DUTY TO FILE REPORTS UNDER SECTIONS 13 AND 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934. Commission File Number: 001-35211 GASTAR EXPLORATION INC. (Exact name of registrant as speci

May 10, 2017 PRE 14A

Gastar Exploration PRE 14A

PRE 14A 1 gst-pre14a20170627.htm PRE 14A UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☒ Preliminary Proxy Statement ☐ Confidential, For Use of the Commission Only (as permitted by Ru

May 10, 2017 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): May 10, 2017 (May 10, 2017) GASTA

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): May 10, 2017 (May 10, 2017) GASTAR EXPLORATION INC. (Exact Name of Registrant as Specified in its Charter) DELAWARE 001-35211 38-3531640 (State or other jurisdiction (Commission File

May 10, 2017 EX-10.4

Purchase Letter Agreement, dated February 24, 2017 by and among Gastar Exploration Inc., John B. Kleinheinz, Kleinheinz Capital Partners, Inc., GKK Husky, L.L.C., Husky Oklahoma, LLC and Strong Oil and Gas, Ltd. (incorporated by reference to Exhibit 10.4 of the Quarterly Report on Form 10-Q filed with the SEC on May 10, 2017. File No. 001-35211).

EX-10.4 2 gst-ex104176.htm EX-10.4 Exhibit 10.4 February 24, 2017 Fred N. Reynolds 420 Throckmorton, Suite 750 Fort Worth, Texas 76101 RE:Revised Offer to Purchase Kleinheinz Group Chisholm Trail & Prairie Grove Areas Kingfisher County, Oklahoma Dear Mr. Reynolds: Reference is made to recent phone conversations whereby you indicated that John B. Kleinheinz, Kleinheinz Capital Partners, Inc., GKK H

May 10, 2017 EX-10.6

Amendment No. 2 to Purchase Letter Agreement, dated March 21, 2017 by and among Gastar Exploration Inc., John B. Kleinheinz, Kleinheinz Capital Partners, Inc., GKK Husky, L.L.C., Husky Oklahoma, LLC and Strong Oil and Gas, Ltd. (incorporated by reference to Exhibit 10.6 of the Quarterly Report on Form 10-Q, filed with the SEC on May 10, 2017. File No. 001-35211).

Exhibit 10.6 March 21, 2017 Fred N. Reynolds 420 Throckmorton, Suite 750 Fort Worth, Texas 76101 RE:Amendment No. 2 Revised Offer to Purchase Kleinheinz Group Chisholm Trail & Prairie Grove Areas Kingfisher County, Oklahoma Dear Mr. Reynolds: This letter shall serve as the Second Amendment to the Revised Offer to Purchase Letter dated February 24, 2017 between the Kleinheinz Group and Gastar Explo

May 10, 2017 EX-99.2

Gastar Exploration Inc. Declares Monthly Cash Dividend on 8.625% Series A Preferred Stock and 10.75% Series B Preferred Stock

EX-99.2 3 gst-ex99214.htm EX-99.2 Exhibit 99.2 For Immediate Release NEWS RELEASE Contacts: Gastar Exploration Inc. J. Russell Porter, Chief Executive Officer 713-739-1800 / [email protected] Investor Relations Counsel: Lisa Elliott / [email protected] Dennard-Lascar Associates: 713-529-6600 Gastar Exploration Inc. Declares Monthly Cash Dividend on 8.625% Series A Preferred Stock and 10.

May 10, 2017 EX-10.5

Amendment No. 1 to Purchase Letter Agreement, dated March 16, 2017 by and among Gastar Exploration Inc., John B. Kleinheinz, Kleinheinz Capital Partners, Inc., GKK Husky, L.L.C., Husky Oklahoma, LLC and Strong Oil and Gas, Ltd. (incorporated by reference to Exhibit 10.5 of the Quarterly Report on Form 10-K for the quarter ended March 31, 2017, filed with the SEC on May 10, 2017. File No. 001-35211).

EX-10.5 3 gst-ex105175.htm EX-10.5 Exhibit 10.5 March 16, 2017 Fred N. Reynolds 420 Throckmorton, Suite 750 Fort Worth, Texas 76101 RE:Amendment No. 1 Revised Offer to Purchase Kleinheinz Group Chisholm Trail & Prairie Grove Areas Kingfisher County, Oklahoma Dear Mr. Reynolds: Gastar Exploration Inc. (“Gastar”) hereby proposes that the Acquisition Price paragraph in the executed offer to purchase

May 10, 2017 EX-99.1

Gastar Exploration Announces FIRST Quarter 2017 Results

EX-99.1 2 gst-ex99113.htm EX-99.1 Exhibit 99.1 For Immediate Release NEWS RELEASE Contacts: Gastar Exploration Inc. Michael A. Gerlich, Chief Financial Officer 713-739-1800 / [email protected] Investor Relations Counsel: Lisa Elliott, Dennard▪Lascar Associates: 713-529-6600 / [email protected] Gastar Exploration Announces FIRST Quarter 2017 Results HOUSTON, May 10, 2017 - Gastar Explora

May 10, 2017 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

10-Q 1 gst-10q20170331.htm GST-Q3-20170331 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE QUARTERLY PERIOD ENDED March 31, 2017 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE TRANSITION PERIOD FROM TO Commission

May 4, 2017 8-K

Gastar Exploration 8-K (Current Report/Significant Event)

gst-8k20170502.htm UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): May 4, 2017 (May 2, 2017) GASTAR EXPLORATION INC. (Exact Name of Registrant as Specified in its Charter) DELAWARE 001-35211 38-3531640 (State or other jurisdiction

May 4, 2017 EX-99.1

Gastar Exploration Stockholders Approve Convertible Notes and Exchange; Company Reschedules First Quarter 2017 Earnings Release and Conference Call Conference Call now to be held on Thursday, May 11 at 10:00 a.m. Eastern Time

EX-99.1 2 gst-ex9916.htm EX-99.1 NEWS RELEASE Contacts: Gastar Exploration Inc. Michael A. Gerlich, Chief Financial Officer 713-739-1800 / [email protected] Investor Relations Counsel: Lisa Elliott / [email protected] Dennard-Lascar Associates: 713-529-6600 Gastar Exploration Stockholders Approve Convertible Notes and Exchange; Company Reschedules First Quarter 2017 Earnings Release and

May 4, 2017 SC 13D/A

GST / Gastar Exploration Inc. / ARES MANAGEMENT LLC - SC 13D/A Activist Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D Under the Securities Exchange Act of 1934 (Amendment No. 2)* GASTAR EXPLORATION INC. (Name of Issuer) Common Stock, $0.001 par value (Title of Class of Securities) 36729W202 (CUSIP Number) Monica J. Shilling Proskauer Rose LLP 2049 Century Park East, Suite 3200 Los Angeles, California 90067 Tel: (310) 557-2900 Fax

May 3, 2017 EX-24.1

EX-24.1

LIMITED POWER OF ATTORNEY FOR SECTION 16 REPORTING PURPOSES Know all by these present, that the undersigned hereby makes, constitutes and appoints each of Michael Weiner and Naseem Sagati, acting individually, as the undersigned's true and lawful attorney-in-fact, with full power and authority as hereinafter described on behalf of and in the name, place and stead of the undersigned to: (1) execute for, and on behalf of, the undersigned, in the undersigned's capacity as an officer and/or director of Gastar Exploration Inc.

May 3, 2017 EX-24.1

EX-24.1

POWER OF ATTORNEY FOR EXECUTING FORM ID, FORMS 3, FORMS 4 AND FORMS 5, FORM 144 AND SCHEDULE 13D AND SCHEDULE 13G The undersigned hereby constitutes and appoints Michael A.

April 10, 2017 8-K

Gastar Exploration 8-K (Current Report/Significant Event)

gst-8k20170410.htm UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): April 10, 2017 (April 10, 2017) GASTAR EXPLORATION INC. (Exact Name of Registrant as Specified in its Charter) DELAWARE 001-35211 38-3531640 (State or other jurisdi

April 10, 2017 EX-99.1

Gastar Exploration Inc. Declares Monthly Cash Dividend on 8.625% Series A Preferred Stock and 10.75% Series B Preferred Stock

gst-ex9916.htm Exhibit 99.1 For Immediate Release NEWS RELEASE Contacts: Gastar Exploration Inc. J. Russell Porter, Chief Executive Officer 713-739-1800 / [email protected] Investor Relations Counsel: Lisa Elliott / [email protected] Dennard-Lascar Associates: 713-529-6600 Gastar Exploration Inc. Declares Monthly Cash Dividend on 8.625% Series A Preferred Stock and 10.75% Series B Prefer

April 7, 2017 DEF 14A

Gastar Exploration DEF 14A

DEF 14A Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON D.

April 6, 2017 8-A12B/A

Gastar Exploration 8-A12B/A

8-A12B/A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-A/A (Amendment No. 1) FOR REGISTRATION OF CERTAIN CLASSES OF SECURITIES PURSUANT TO SECTION 12(b) OR 12(g) OF THE SECURITIES EXCHANGE ACT OF 1934 GASTAR EXPLORATION INC. (Exact name of registrant as specified in its charter) Delaware 38-3531640 (State or other jurisdiction of incorporation) (IRS Employer Identi

April 6, 2017 8-K

Regulation FD Disclosure, Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year, Entry into a Material Definitive Agreement, Termination of a Material Definitive Agreement, Material Modification to Rights of Security Holders, Financial Statements and Exhibits

8-K 1 gst-8k20170406.htm 8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): April 6, 2017 GASTAR EXPLORATION INC. (Exact Name of Registrant as Specified in its Charter) DELAWARE 001-35211 38-3531640 (State or other jurisdiction (C

April 6, 2017 EX-4.1

Amendment No. 1 to the Rights Agreement, dated as of April 6, 2017, between Gastar Exploration Inc. and American Stock Transfer & Trust Company, LLC, as Rights Agent (incorporated by reference to Exhibit 4.1 of the Current Report on Form 8-K filed with the SEC on April 6, 2017. File No. 001-35211)

gst-ex417.htm Exhibit 4.1 US 4961821 AMENDMENT NO. 1 TO RIGHTS AGREEMENT This AMENDMENT NO. 1 TO THE RIGHTS AGREEMENT (this “Amendment”) is dated as of April 6, 2017 (the “Effective Date”) and amends the Rights Agreement, dated as of January 27, 2017 (the “Rights Agreement”), by and between Gastar Exploration Inc., a Delaware corporation (the “Company”), and American Stock Transfer & Trust Company

April 6, 2017 EX-99.1

GASTAR EXPLORATION INC. TERMINATES NOL SHAREHOLDER RIGHTS PLAN

gst-ex9918.htm Exhibit 99.1 For Immediate Release NEWS RELEASE Contacts: Gastar Exploration Inc. J. Russell Porter, Chief Executive Officer 713-739-1800 / [email protected] Investor Relations Counsel: Lisa Elliott, Dennard?Lascar Associates: 713-529-6600 / [email protected] GASTAR EXPLORATION INC. TERMINATES NOL SHAREHOLDER RIGHTS PLAN HOUSTON, TEXAS, April 6, 2017 ? Gastar Exploration I

April 6, 2017 EX-3.1

Certificate of Elimination of Series C Junior Participating Preferred Stock of Gastar Exploration Inc. (incorporated by reference to Exhibit 3.1 of the Current Report on Form 8-K filed with the SEC on April 6, 2017. File No. 001-35211).

EX-3.1 2 gst-ex319.htm EX-3.1 Exhibit 4.1 US 4961819 CERTIFICATE OF ELIMINATION OF Series C Junior Participating Preferred Stock OF GASTAR EXPLORATION INC. (Pursuant to Section 151(g) of the General Corporation Law of the State of Delaware) Gastar Exploration Inc., a Delaware corporation (the “Company”), certifies as follows: 1. Pursuant to Section 151 of the General Corporation Law of the State o

April 6, 2017 S-3

Gastar Exploration S-3

S-3 1 d356132ds3.htm S-3 Table of Contents As filed with the Securities and Exchange Commission on April 6, 2017 Registration No. 333- UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM S-3 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 Gastar Exploration Inc. (Exact name of registrant as specified in its charter) Delaware 38-3531640 (State or other jurisdiction

April 6, 2017 EX-12.2

STATEMENT OF COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES AND PREFERRED STOCK DIVIDENDS For the Years Ended December 31, 2016 2015 2014 2013 2012 (in thousands, except ratios) Earnings (Loss): Net income (loss) $ (89,061 ) $ (459,507 ) $ 50,953

EX-12.2 Exhibit 12.2 STATEMENT OF COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES AND PREFERRED STOCK DIVIDENDS (Unaudited) For the Years Ended December 31, 2016 2015 2014 2013 2012 (in thousands, except ratios) Earnings (Loss): Net income (loss) $ (89,061 ) $ (459,507 ) $ 50,953 $ 49,342 $ (153,791 ) Add: Fixed Charges 38,522 34,796 32,138 16,598 2,340 Add: Amortization of capitalized interest

April 6, 2017 EX-12.1

STATEMENT OF COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES For the Years Ended December 31, 2016 2015 2014 2013 2012 (in thousands, except ratios) Earnings (Loss): Net income (loss) $ (89,061 ) $ (459,507 ) $ 50,953 $ 49,342 $ (153,791 ) Add: Fix

EX-12.1 Exhibit 12.1 STATEMENT OF COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES (Unaudited) For the Years Ended December 31, 2016 2015 2014 2013 2012 (in thousands, except ratios) Earnings (Loss): Net income (loss) $ (89,061 ) $ (459,507 ) $ 50,953 $ 49,342 $ (153,791 ) Add: Fixed Charges 38,522 34,796 32,138 16,598 2,340 Add: Amortization of capitalized interest 1,389 896 594 883 7,119 Less:

March 27, 2017 PRE 14A

Gastar Exploration PRE 14A

PRE 14A Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON D.

March 23, 2017 SC 13D/A

GST / Gastar Exploration Inc. / ARES MANAGEMENT LLC - SC 13D/A Activist Investment

SC 13D/A 1 a17-86021sc13da.htm SC 13D/A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D Under the Securities Exchange Act of 1934 (Amendment No. 1)* GASTAR EXPLORATION INC. (Name of Issuer) Common Stock, $0.001 par value (Title of Class of Securities) 36729W202 (CUSIP Number) Monica J. Shilling Proskauer Rose LLP 2049 Century Park East, Suite 3200 Los Angeles,

March 22, 2017 EX-10.1

Securities Purchase Agreement, dated as of March 20, 2017, by and among Gastar Exploration Inc. and each of the purchasers listed on Schedule I thereto (incorporated by reference to Exhibit 10.1 of the Current Report on Form 8-K filed with the SEC on March 22, 2017. File No. 001-35211).

EX-10.1 5 d359964dex101.htm EX-10.1 Exhibit 10.1 SECURITIES PURCHASE AGREEMENT BY AND AMONG GASTAR EXPLORATION INC. AND EACH OF THE PURCHASERS LISTED ON SCHEDULE I HERETO Dated as of March 20, 2017 TABLE OF CONTENTS 1. Definitions 2 2. Authorization, Purchase and Sale of the Securities 7 2.1. Authorization, Purchase and Sale 7 2.2. Closing 7 3. Representations and Warranties of the Company 7 3.1.

March 22, 2017 8-K

Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year, Entry into a Material Definitive Agreement, Material Modification to Rights of Security Holders, Unregistered Sales of Equity Securities, Financial Statements and Exhibits, Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant, Other Events

8-K 1 d359964d8k.htm 8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): March 22, 2017 (March 20, 2017) GASTAR EXPLORATION INC. (Exact Name of Registrant as Specified in its Charter) DELAWARE 001-35211 38-3531640 (State or other j

March 22, 2017 EX-99.1

Gastar Exploration Announces Acquisition of STACK Leasehold Acquisition Financed by Increase in Ares Convertible Notes

EX-99.1 7 d359964dex991.htm EX-99.1 Exhibit 99.1 For Immediate Release NEWS RELEASE Contacts: Gastar Exploration Inc. J. Russell Porter, Chief Executive Officer 713-739-1800 / [email protected] Investor Relations Counsel: Lisa Elliott, Dennard◾Lascar Associates: 713-529-6600 / [email protected] Gastar Exploration Announces Acquisition of STACK Leasehold Acquisition Financed by Increase i

March 22, 2017 EX-4.4

Amendment No. 1 to the Registration Rights Agreement, dated as of March 21, 2017, by and among Gastar Exploration Inc. and each of the purchasers listed on Schedule I thereto (incorporated by reference to Exhibit 4.4 of the Current Report on Form 8-K filed with the SEC on March 22, 2017. File No. 001-35211).

EX-4.4 4 d359964dex44.htm EX-4.4 Exhibit 4.4 AMENDMENT NO. 1 TO THE REGISTRATION RIGHTS AGREEMENT This AMENDMENT NO. 1 (this “Amendment”), dated as of March 21, 2017, to the Registration Rights Agreement, dated as of March 3, 2017 (the “Agreement”), by and among Gastar Exploration Inc., a Delaware corporation (the “Company”) and each of the purchasers listed on Schedule I thereto (the “Purchasers”

March 22, 2017 EX-3.1

Certificate of Designation of Special Voting Shares of Gastar Exploration Inc. dated March 22, 2017 (incorporated by reference to Exhibit 3.1 of the Current Report on Form 8-K filed with the SEC on March 22, 2017. File No. 001-35211).

EX-3.1 Exhibit 3.1 CERTIFICATE OF DESIGNATION OF SPECIAL VOTING PREFERRED STOCK OF GASTAR EXPLORATION INC. March 22, 2017 Pursuant to the General Corporation Law of the State of Delaware Gastar Exploration Inc., a Delaware corporation (the ?Corporation?), hereby certifies, that pursuant to the authority expressly vested in the Board of Directors of the Corporation (the ?Board?) by the Amended and

March 22, 2017 EX-10.2

Amendment No. 1 to Third Amended and Restated Credit Agreement, dated as of March 20, 2017, among Gastar Exploration Inc., as borrower, certain subsidiaries of borrower, as guarantors, the lenders party thereto and Wilmington Trust, National Association, as administrative agent. (incorporated by reference to Exhibit 10.2 of the Current Report on Form 8-K filed with the SEC on March 22, 2017. File No. 001-35211).

EX-10.2 Exhibit 10.2 AMENDMENT NO. 1 TO CREDIT AGREEMENT This AMENDMENT NO. 1 TO THIRD AMENDED AND RESTATED CREDIT AGREEMENT (this ?Amendment?), dated as of March 20, 2017, is by and among GASTAR EXPLORATION INC., a Delaware corporation (?Borrower?), certain subsidiary guarantors of the Borrower party hereto (the ?Guarantors? and together with Borrower, the ?Credit Parties?), the lenders party her

March 22, 2017 EX-4.2

First Supplemental Indenture, dated as of March 21, 2017, between Gastar Exploration Inc. and Wilmington Trust, National Association as Trustee and Collateral Agent (incorporated by reference to Exhibit 4.2 of the Current Report on Form 8-K filed with the SEC on March 22, 2017. File No. 001-35211).

EX-4.2 3 d359964dex42.htm EX-4.2 Exhibit 4.2 FIRST SUPPLEMENTAL INDENTURE FIRST SUPPLEMENTAL INDENTURE (this “Supplemental Indenture”), dated as of March 21, 2017, among Gastar Exploration Inc. (or its successor, the “Company”), Northwest Property Ventures LLC (the “Guarantor”), and Wilmington Trust, National Association, a national banking association, as Trustee (the “Trustee”) and as Collateral

March 22, 2017 DEFA14A

Gastar Exploration 8-K

8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): March 22, 2017 (March 20, 2017) GASTAR EXPLORATION INC. (Exact Name of Registrant as Specified in its Charter) DELAWARE 001-35211 38-3531640 (State or other jurisdiction of incorp

March 22, 2017 EX-10.2

AMENDMENT NO. 1 TO CREDIT AGREEMENT

EX-10.2 Exhibit 10.2 AMENDMENT NO. 1 TO CREDIT AGREEMENT This AMENDMENT NO. 1 TO THIRD AMENDED AND RESTATED CREDIT AGREEMENT (this ?Amendment?), dated as of March 20, 2017, is by and among GASTAR EXPLORATION INC., a Delaware corporation (?Borrower?), certain subsidiary guarantors of the Borrower party hereto (the ?Guarantors? and together with Borrower, the ?Credit Parties?), the lenders party her

March 22, 2017 EX-3.1

CERTIFICATE OF DESIGNATION SPECIAL VOTING PREFERRED STOCK GASTAR EXPLORATION INC. March 22, 2017 Pursuant to the General Corporation Law of the State of Delaware

EX-3.1 Exhibit 3.1 CERTIFICATE OF DESIGNATION OF SPECIAL VOTING PREFERRED STOCK OF GASTAR EXPLORATION INC. March 22, 2017 Pursuant to the General Corporation Law of the State of Delaware Gastar Exploration Inc., a Delaware corporation (the ?Corporation?), hereby certifies, that pursuant to the authority expressly vested in the Board of Directors of the Corporation (the ?Board?) by the Amended and

March 22, 2017 EX-10.1

SECURITIES PURCHASE AGREEMENT BY AND AMONG GASTAR EXPLORATION INC. EACH OF THE PURCHASERS LISTED ON SCHEDULE I HERETO Dated as of March 20, 2017 TABLE OF CONTENTS 1. Definitions 2 2. Authorization, Purchase and Sale of the Securities 7 2.1. Authoriza

EX-10.1 Exhibit 10.1 SECURITIES PURCHASE AGREEMENT BY AND AMONG GASTAR EXPLORATION INC. AND EACH OF THE PURCHASERS LISTED ON SCHEDULE I HERETO Dated as of March 20, 2017 TABLE OF CONTENTS 1. Definitions 2 2. Authorization, Purchase and Sale of the Securities 7 2.1. Authorization, Purchase and Sale 7 2.2. Closing 7 3. Representations and Warranties of the Company 7 3.1. Organization and Power 7 3.2

March 22, 2017 EX-4.2

FIRST SUPPLEMENTAL INDENTURE

EX-4.2 3 d359964dex42.htm EX-4.2 Exhibit 4.2 FIRST SUPPLEMENTAL INDENTURE FIRST SUPPLEMENTAL INDENTURE (this “Supplemental Indenture”), dated as of March 21, 2017, among Gastar Exploration Inc. (or its successor, the “Company”), Northwest Property Ventures LLC (the “Guarantor”), and Wilmington Trust, National Association, a national banking association, as Trustee (the “Trustee”) and as Collateral

March 22, 2017 EX-4.4

AMENDMENT NO. 1 TO THE REGISTRATION RIGHTS AGREEMENT

EX-4.4 4 d359964dex44.htm EX-4.4 Exhibit 4.4 AMENDMENT NO. 1 TO THE REGISTRATION RIGHTS AGREEMENT This AMENDMENT NO. 1 (this “Amendment”), dated as of March 21, 2017, to the Registration Rights Agreement, dated as of March 3, 2017 (the “Agreement”), by and among Gastar Exploration Inc., a Delaware corporation (the “Company”) and each of the purchasers listed on Schedule I thereto (the “Purchasers”

March 22, 2017 EX-99.1

Gastar Exploration Announces Acquisition of STACK Leasehold Acquisition Financed by Increase in Ares Convertible Notes

EX-99.1 Exhibit 99.1 For Immediate Release NEWS RELEASE Contacts: Gastar Exploration Inc. J. Russell Porter, Chief Executive Officer 713-739-1800 / [email protected] Investor Relations Counsel: Lisa Elliott, Dennard?Lascar Associates: 713-529-6600 / [email protected] Gastar Exploration Announces Acquisition of STACK Leasehold Acquisition Financed by Increase in Ares Convertible Notes HOU

March 20, 2017 8-K

Financial Statements and Exhibits, Other Events

8-K 1 gst-8k20170320.htm 8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): March 20, 2017 GASTAR EXPLORATION INC. (Exact Name of Registrant as Specified in its Charter) DELAWARE 001-35211 38-3531640 (State or other jurisdiction o

March 20, 2017 EX-99.1

Gastar Exploration Inc. Announces Record Date and Meeting Date for Special Meeting of Stockholders

EX-99.1 2 gst-ex9916.htm EX-99.1 Exhibit 99.1 For Immediate Release NEWS RELEASE Contacts: Gastar Exploration Inc. J. Russell Porter, Chief Executive Officer 713-739-1800 / [email protected] Investor Relations Counsel: Lisa Elliott / [email protected] Dennard-Lascar Associates: 713-529-6600 Gastar Exploration Inc. Announces Record Date and Meeting Date for Special Meeting of Stockholders

March 20, 2017 DEFA14A

Gastar Exploration 8-K

DEFA14A 1 gst-8k20170320.htm 8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): March 20, 2017 GASTAR EXPLORATION INC. (Exact Name of Registrant as Specified in its Charter) DELAWARE 001-35211 38-3531640 (State or other jurisdicti

March 20, 2017 EX-99.1

Gastar Exploration Inc. Announces Record Date and Meeting Date for Special Meeting of Stockholders

EX-99.1 2 gst-ex9916.htm EX-99.1 Exhibit 99.1 For Immediate Release NEWS RELEASE Contacts: Gastar Exploration Inc. J. Russell Porter, Chief Executive Officer 713-739-1800 / [email protected] Investor Relations Counsel: Lisa Elliott / [email protected] Dennard-Lascar Associates: 713-529-6600 Gastar Exploration Inc. Announces Record Date and Meeting Date for Special Meeting of Stockholders

March 10, 2017 EX-99.1

Gastar Exploration Announces Fourth Quarter, Full-Year 2016 Results and 2017 Guidance

Exhibit 99.1 For Immediate Release NEWS RELEASE Contacts: Gastar Exploration Inc. Michael A. Gerlich, Chief Financial Officer 713-739-1800 / [email protected] Investor Relations Counsel: Lisa Elliott, Dennard▪Lascar Associates: 713-529-6600 / [email protected] Gastar Exploration Announces Fourth Quarter, Full-Year 2016 Results and 2017 Guidance HOUSTON, March 9, 2017 - Gastar Exploratio

March 10, 2017 8-K

Regulation FD Disclosure, Financial Statements and Exhibits, Results of Operations and Financial Condition

8-K 1 gst-8k20170309.htm 8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): March 10, 2017 (March 9, 2017) GASTAR EXPLORATION INC. (Exact Name of Registrant as Specified in its Charter) DELAWARE 001-35211 38-3531640 (State or othe

March 10, 2017 EX-99.2

Gastar Exploration Inc. Declares Monthly Cash Dividend on 8.625% Series A Preferred Stock and 10.75% Series B Preferred Stock

EX-99.2 3 gst-ex99211.htm EX-99.2 Exhibit 99.2 For Immediate Release NEWS RELEASE Contacts: Gastar Exploration Inc. J. Russell Porter, Chief Executive Officer 713-739-1800 / [email protected] Investor Relations Counsel: Lisa Elliott / [email protected] Dennard-Lascar Associates: 713-529-6600 Gastar Exploration Inc. Declares Monthly Cash Dividend on 8.625% Series A Preferred Stock and 10.

March 9, 2017 EX-12.1

STATEMENT OF COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES

Exhibit 12.1 STATEMENT OF COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES (Unaudited) For the Years Ended December 31, 2016 2015 2014 2013 2012 (in thousands, except ratios) Earnings (Loss): Net income (loss) $ (89,061 ) $ (459,507 ) $ 50,953 $ 49,342 $ (153,791 ) Add: Fixed Charges 38,522 34,796 32,138 16,598 2,340 Add: Amortization of capitalized interest 1,389 896 594 883 7,119 Less: Interest

March 9, 2017 EX-21.1

Subsidiaries of Gastar Exploration Inc. (incorporated by reference to Exhibit 21.1 of the of the Annual Report on Form 10-K filed with SEC on March 9, 2017. File No. 001-35211).

EX-21.1 4 gst-ex2118.htm EX-21.1 Exhibit 21.1 GASTAR EXPLORATION INC. Subsidiary List as of March 6, 2017 None.

March 9, 2017 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K (Mark One) ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2016 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number: 001-35

March 9, 2017 EX-12.2

STATEMENT OF COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES AND PREFERRED STOCK DIVIDENDS

Exhibit 12.2 STATEMENT OF COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES AND PREFERRED STOCK DIVIDENDS (Unaudited) For the Years Ended December 31, 2016 2015 2014 2013 2012 (in thousands, except ratios) Earnings (Loss): Net income (loss) $ (89,061 ) $ (459,507 ) $ 50,953 $ 49,342 $ (153,791 ) Add: Fixed Charges 38,522 34,796 32,138 16,598 2,340 Add: Amortization of capitalized interest 1,389 89

March 9, 2017 EX-99.1

January 11, 2017

Exhibit 99.1 January 11, 2017 Gastar Exploration Inc.1331 Lamar, Suite 650 Houston, TX 77010 Attention: Mr. J. Russell Porter SUBJECT:Evaluation of Oil and Gas Reserves To the Interests of Gastar Exploration Inc. In Certain Properties Located in Oklahoma & West Virginia Pursuant to the Requirements of the Securities and Exchange Commission Effective January 1, 2017 Job 16.1823 At the request of Ga

March 8, 2017 SC 13D

GST / Gastar Exploration Inc. / ARES MANAGEMENT LLC - SC 13D Activist Investment

SC 13D 1 a17-71612sc13d.htm SC 13D UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D Under the Securities Exchange Act of 1934 GASTAR EXPLORATION INC. (Name of Issuer) Common Stock, $0.001 par value (Title of Class of Securities) 36729W202 (CUSIP Number) Monica J. Shilling Proskauer Rose LLP 2049 Century Park East, Suite 3200 Los Angeles, California 90067 Tel: (3

March 8, 2017 EX-99.1

JOINT FILING AGREEMENT

Exhibit 99.1 JOINT FILING AGREEMENT In accordance with Rule 13d-1(k)(1) promulgated under the Securities Exchange Act of 1934, as amended, the undersigned hereby agree to the joint filing with each of the Reporting Persons (as such term is defined in the Schedule 13D referred to below) on behalf of each of them of a statement on Schedule 13D (including amendments thereto) with respect to the Commo

March 7, 2017 EX-99.1

Gastar Exploration Completes Capital and Refinancing Transactions with Funds Managed by Ares Management

EX-99.1 11 d286197dex991.htm EX-99.1 Exhibit 99.1 For Immediate Release NEWS RELEASE Contacts: Gastar Exploration Inc. J. Russell Porter, Chief Executive Officer 713-739-1800 / [email protected] Investor Relations Counsel: Lisa Elliott, Dennard ● Lascar Associates: 713-529-6600 / [email protected] Gastar Exploration Completes Capital and Refinancing Transactions with Funds Managed by Are

March 7, 2017 EX-10.1

Securities Purchase Agreement dated as of February 16, 2017, by and among Gastar Exploration Inc. and each of the purchasers listed on Schedule I thereto (incorporated by reference to Exhibit 10.1 of the Current Report on Form 8-K filed with the SEC on March 7, 2017. File No. 001-35211).

EX-10.1 4 d286197dex101.htm EX-10.1 Exhibit 10.1 SECURITIES PURCHASE AGREEMENT BY AND AMONG GASTAR EXPLORATION INC. AND EACH OF THE PURCHASERS LISTED ON SCHEDULE I HERETO Dated as of February 16, 2017 TABLE OF CONTENTS 1. Definitions 1 2. Authorization, Purchase and Sale of the Securities 8 2.1. Authorization, Purchase and Sale 8 2.2. Closing 8 3. Representations and Warranties of the Company 9 3.

March 7, 2017 EX-10.2

Amendment No. 1 to Securities Purchase Agreement dated as of March 3, 2017, by and among Gastar Exploration Inc. and each of the purchasers listed on Schedule I thereto (incorporated by reference to Exhibit 10.2 of the Current Report on Form 8-K filed with the SEC on March 7, 2017. File No. 001-35211).

EX-10.2 5 d286197dex102.htm EX-10.2 Exhibit 10.2 AMENDMENT NO. 1 TO THE SECURITIES PURCHASE AGREEMENT This AMENDMENT NO. 1 (this “Amendment”), dated as of March 3, 2017, to the Securities Purchase Agreement, dated as of February 16, 2017 (the “Agreement”), by and among Gastar Exploration Inc., a Delaware corporation (the “Company”) and each of the purchasers listed on Schedule I thereto (the “Purc

March 7, 2017 EX-10.7

Pledge and Security Agreement, dated March 3, 2017, by and among Gastar Exploration Inc., the subsidiary guarantor named therein and Wilmington Trust, National Association, as collateral trustee (incorporated by reference to Exhibit 10.7 of the Current Report on Form 8-K filed with the SEC on March 7, 2017. File No. 001-35211).

EX-10.7 10 d286197dex107.htm EX-10.7 Exhibit 10.7 PLEDGE AND SECURITY AGREEMENT This PLEDGE AND SECURITY AGREEMENT is entered into as of March 3, 2017, by and among GASTAR EXPLORATION INC., a Delaware corporation (“Issuer”), each subsidiary of the Issuer signatory hereto (together with the Issuer, the “Grantors” and individually, each a “Grantor”) and Wilmington Trust, National Association, as col

March 7, 2017 EX-10.5

Intercreditor Agreement, dated March 3, 2017, by and among Morgan Stanley Capital Group, Inc., NextEra Energy Marketing, LLC, Cargill, Incorporated, Koch Supply & Trading, LP, Gastar Exploration Inc., the guarantor party thereto, Wilmington Trust, National Association, as administrative agent for the lenders from time to time party to the credit agreement, and Wilmington Trust, National Association, as collateral agent on behalf of the secured parties (incorporated by reference to Exhibit 10.5 of the Current Report on Form 8-K filed with the SEC on March 7, 2017. File No. 001-35211).

Exhibit 10.5 INTERCREDITOR AGREEMENT THIS INTERCREDITOR AGREEMENT (this ?Agreement?) is entered into as of March 3, 2017 by and among MORGAN STANLEY CAPITAL GROUP INC., a Delaware corporation (?Morgan Stanley?), NextEra Energy Marketing, LLC, a Delaware limited liability company (?NextEra?), Cargill, Incorporated, a Delaware corporation (?Cargill?), and Koch Supply & Trading, LP, a Delaware limite

March 7, 2017 8-K

Regulation FD Disclosure, Entry into a Material Definitive Agreement, Unregistered Sales of Equity Securities, Financial Statements and Exhibits, Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant

8-K 1 d286197d8k.htm 8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): March 7, 2017 (March 3, 2017) GASTAR EXPLORATION INC. (Exact Name of Registrant as Specified in its Charter) DELAWARE 001-35211 38-3531640 (State or other jur

March 7, 2017 EX-4.1

Indenture, dated as of March 3, 2017, between Gastar Exploration Inc. and Wilmington Trust, National Association as Trustee and Collateral Agent (incorporated by reference to Exhibit 4.1 of the Current Report on Form 8-K filed with the SEC on March 7, 2017. File No. 001-35211).

EX-4.1 Exhibit 4.1 GASTAR EXPLORATION INC., THE GUARANTOR LISTED ON THE SIGNATURE PAGES HEREOF and WILMINGTON TRUST, NATIONAL ASSOCIATION as Trustee and Collateral Trustee INDENTURE Dated as of March 3, 2017 Convertible Notes due 2022 TABLE OF CONTENTS Page Article 1. Definitions; Rules of Construction 1 Section 1.01. Definitions 1 Section 1.02. Other Definitions 38 Section 1.03. Rules of Construc

March 7, 2017 EX-10.6

Third Amended and Restated Pledge and Security Agreement, dated March 3, 2017, by and among Gastar Exploration Inc., the subsidiary guarantor named therein and Wilmington Trust, National Association, as collateral trustee (incorporated by reference to Exhibit 10.6 of the Current Report on Form 8-K filed with the SEC on March 7, 2017. File No. 001-35211).

EX-10.6 9 d286197dex106.htm EX-10.6 Exhibit 10.6 THIRD AMENDED AND RESTATED PLEDGE AND SECURITY AGREEMENT This THIRD AMENDED AND RESTATED PLEDGE AND SECURITY AGREEMENT is entered into as of March 3, 2017, by and among GASTAR EXPLORATION INC., a Delaware corporation (“Borrower”), each subsidiary of the Borrower signatory hereto (together with the Borrower, the “Grantors” and individually, each a “G

March 7, 2017 EX-10.3

Third Amended and Restated Credit Agreement, dated as of March 3, 2017, among Gastar Exploration Inc., as borrower, certain subsidiaries of borrower, as guarantors, the lenders party thereto and Wilmington Trust, National Association, as administrative agent (incorporated by reference to Exhibit 10.3 of the Current Report on Form 8-K filed with the SEC on March 7, 2017. File No. 001-35211).

EX-10.3 6 d286197dex103.htm EX-10.3 EXHIBIT 10.3 THIRD AMENDED AND RESTATED CREDIT AGREEMENT dated as of March 3, 2017 among GASTAR EXPLORATION INC., as Borrower The Guarantors from time to time Party Hereto, The Lenders Party Hereto, and WILMINGTON TRUST, NATIONAL ASSOCIATION, as Administrative Agent TABLE OF CONTENTS Page Article I. Definitions 2 Section 1.01 Defined Terms 2 Section 1.02 Terms G

March 7, 2017 EX-10.4

Intercreditor Agreement, dated March 3, 2017, between Wilmington Trust, National Association, as administrative agent for the priority lien secured parties and Wilmington Trust, National Association, as collateral trustee for the second lien secured parties (incorporated by reference to Exhibit 10.4 of the Current Report on Form 8-K filed with the SEC on March 7, 2017. File No. 001-35211).

EX-10.4 Exhibit 10.4 INTERCREDITOR AGREEMENT dated as of March 3, 2017 between Wilmington Trust, National Association, as Priority Lien Agent, and Wilmington Trust, National Association, as Second Lien Agent THIS IS THE INTERCREDITOR AGREEMENT REFERRED TO IN (A) THE INDENTURE DATED AS OF MARCH 3, 2017, AMONG GASTAR EXPLORATION INC., CERTAIN OF ITS SUBSIDIARIES FROM TIME TO TIME PARTY THERETO AND W

March 7, 2017 EX-4.3

Registration Rights Agreement, dated as of March 3, 2017, by and among Gastar Exploration Inc. and each of the purchasers listed on Schedule I thereto (incorporated by reference to Exhibit 4.3 of the Current Report on Form 8-K filed with the SEC on March 7, 2017. File No. 001-35211).

EX-4.3 3 d286197dex43.htm EX-4.3 Exhibit 4.3 REGISTRATION RIGHTS AGREEMENT This Registration Rights Agreement (this “Agreement”) is made and entered into as of March 3, 2017, by and among Gastar Exploration Inc., a Delaware corporation (the “Company”) and each of the purchasers listed on Schedule I hereto (the “Holders”). WHEREAS, the Holders have, pursuant to that certain Securities Purchase Agre

February 23, 2017 8-K

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): February 22, 2017 (February 22, 2017) GASTAR EXPLORATION INC. (Exact Name of Registrant as Specified in its Charter) DELAWARE 001-35211 38-3531640 (State or other jurisdiction (Commis

February 23, 2017 EX-99.1

Gastar Exploration Inc. Conditionally Calls 8-5/8% Senior Secured Notes For Redemption

gst-ex9916.htm For Immediate Release NEWS RELEASE Contacts: Gastar Exploration Inc. Michael A. Gerlich, Chief Financial Officer 713-739-1800 / [email protected] Investor Relations Counsel: Lisa Elliott / [email protected] Dennard-Lascar Associates: 713-529-6600 Gastar Exploration Inc. Conditionally Calls 8-5/8% Senior Secured Notes For Redemption HOUSTON, February 22, 2017 - Gastar Expl

February 17, 2017 EX-99.1

Gastar Exploration Announces Capital Transaction with Funds Managed by Ares Management, Updated STACK Play Well Results, 2016 Year-end Reserves and 2017 Capital Plan Gastar to host a conference call to discuss the announcement at 9:00 am CST today

EX-99.1 Exhibit 99.1 For Immediate Release NEWS RELEASE Contacts: Gastar Exploration Inc. J. Russell Porter, Chief Executive Officer 713-739-1800 / [email protected] Investor Relations Counsel: Lisa Elliott, Dennard?Lascar Associates: 713-529-6600 / [email protected] Gastar Exploration Announces Capital Transaction with Funds Managed by Ares Management, Updated STACK Play Well Results, 2

February 17, 2017 8-K

Regulation FD Disclosure, Entry into a Material Definitive Agreement, Unregistered Sales of Equity Securities, Financial Statements and Exhibits, Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant, Results of Operations and Financial Condition, Other Events

8-K 1 d318908d8k.htm 8-K UNITED STATE SSECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): February 17, 2017 (February 16, 2017) GASTAR EXPLORATION INC. (Exact Name of Registrant as Specified in its Charter) DELAWARE 001-35211 38-3531640 (State or o

February 7, 2017 EX-99.1

Gastar Exploration Inc. Declares Monthly Cash Dividend on 8.625% Series A Preferred Stock and 10.75% Series B Preferred Stock

gst-ex9916.htm For Immediate Release NEWS RELEASE Contacts: Gastar Exploration Inc. J. Russell Porter, Chief Executive Officer 713-739-1800 / [email protected] Investor Relations Counsel: Lisa Elliott / [email protected] Dennard-Lascar Associates: 713-529-6600 Gastar Exploration Inc. Declares Monthly Cash Dividend on 8.625% Series A Preferred Stock and 10.75% Series B Preferred Stock HOU

February 7, 2017 8-K

Regulation FD Disclosure, Financial Statements and Exhibits

gst-8k20170207.htm UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): February 7, 2017 (February 7, 2017) GASTAR EXPLORATION INC. (Exact Name of Registrant as Specified in its Charter) DELAWARE 001-35211 38-3531640 (State or other jur

January 28, 2017 8-A12B

Gastar Exploration 8-A12B

8-A12B UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-A FOR REGISTRATION OF CERTAIN CLASSES OF SECURITIES PURSUANT TO SECTION 12(b) OR 12(g) OF THE SECURITIES EXCHANGE ACT OF 1934 GASTAR EXPLORATION INC. (Exact name of registrant as specified in its charter) Delaware 38-3531640 (State or other jurisdiction of incorporation) (IRS Employer Identification No.) 1331 Lam

January 28, 2017 EX-99.1

Gastar Exploration Adopts Tax Benefit Preservation Plan to Preserve Valuable Net Operating Losses

EX-99.1 4 d317944dex991.htm EX-99.1 Exhibit 99.1 January 27, 2017 Gastar Exploration Adopts Tax Benefit Preservation Plan to Preserve Valuable Net Operating Losses HOUSTON, Jan. 27, 2017 — Gastar Exploration Inc. (NYSE MKT: GST) (“Gastar” or the “Company”) today announced that its Board of Directors has adopted a Net Operating Loss (NOL) Shareholder Rights Agreement (the “Rights Plan”) designed to

January 28, 2017 EX-4.1

Rights Agreement, dated as of January 27, 2017, between Gastar Exploration Inc., as the Company, and American Stock Transfer & Trust Company, LLC, as Rights Agent (incorporated by reference to Exhibit 4.1 of the Current Report on Form 8-K filed with the SEC on January 30, 2017. File No. 001-35211).

EX-4.1 3 d317944dex41.htm EX-4.1 Exhibit 4.1 RIGHTS AGREEMENT dated as of January 27, 2017 between GASTAR EXPLORATION INC., as the Company, and AMERICAN STOCK TRANSFER & TRUST COMPANY, LLC, as Rights Agent TABLE OF CONTENTS Page SECTION 1. Certain Definitions. 1 SECTION 2. Appointment of Rights Agent. 10 SECTION 3. Issue of Rights Certificates. 11 SECTION 4. Form of Rights Certificate. 13 SECTION

January 28, 2017 EX-3.1

Certificate of Amendment to Certificate of Designations of Series C Junior Participating Preferred Stock of Gastar Exploration Inc. (incorporated by reference to Exhibit 3.1 of the Current Report on Form 8-K filed with the SEC on January 30, 2017. File No. 001-35211).

EX-3.1 2 d317944dex31.htm EX-3.1 Exhibit 3.1 CERTIFICATE OF AMENDMENT TO CERTIFICATE OF DESIGNATIONS OF SERIES C JUNIOR PARTICIPATING PREFERRED STOCK OF GASTAR EXPLORATION INC. Gastar Exploration Inc., a corporation organized under and existing under the laws of the State of Delaware (the “Corporation”), certifies that: FIRST: The name of the Corporation is Gastar Exploration Inc. SECOND: The Corp

January 28, 2017 8-K

Regulation FD Disclosure, Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year, Entry into a Material Definitive Agreement, Material Modification to Rights of Security Holders, Financial Statements and Exhibits

8-K 1 d317944d8k.htm 8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): January 27, 2017 GASTAR EXPLORATION INC. (Exact name of registrant as specified in its charter) Delaware 001-35211 38-3531640 (State or other jurisdiction of

January 11, 2017 EX-99.1

Gastar Exploration Inc. Declares Special Cash Dividends on 8.625% Series A Preferred Stock and 10.75% Series B Preferred Stock; Enters Into Related Amendment of Credit Agreement

EX-99.1 3 gst-ex99111.htm EX-99.1 Exhibit 99.1 For Immediate Release NEWS RELEASE Contacts: Gastar Exploration Inc. Michael A. Gerlich, Chief Financial Officer 713-739-1800 / [email protected] Investor Relations Counsel: Lisa Elliott, Dennard▪Lascar Associates: 713-529-6600 / [email protected] Gastar Exploration Inc. Declares Special Cash Dividends on 8.625% Series A Preferred Stock and

January 11, 2017 8-K

Regulation FD Disclosure, Entry into a Material Definitive Agreement, Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): January 11, 2017 (January 10, 2017) GASTAR EXPLORATION INC. (Exact Name of Registrant as Specified in its Charter) DELAWARE 001-35211 38-3531640 (State or other jurisdiction (Commissi

January 11, 2017 EX-10.1

Amendment No. 10 to Second Amended and Restated Credit Agreement, dated January 10, 2017, by and among Gastar Exploration Inc., the Lenders party thereto, and Wells Fargo Bank, National Association, as administrative agent for the lenders thereto, as collateral agent, as swing line lender and as issuing lender (incorporated by reference to Exhibit 10.1 of the Current Report on Form 8-K filed with the SEC on January 11, 2017. File No. 001-35211).

gst-ex10110.htm Exhibit 10.1 Execution Version AMENDMENT NO. 10 TO SECOND AMENDED AND RESTATED CREDIT AGREEMENT This Amendment No. 10 to Second Amended and Restated Credit Agreement ("Agreement") dated as of January 10, 2017 ("Effective Date"), is among Gastar Exploration Inc., a Delaware corporation ("Borrower"), the Lenders (as defined below) party hereto constituting the Required Lenders, and W

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