SDTTU / SandRidge Mississippian Trust I - Pengajuan SECLaporan Tahunan, Pernyataan Proksi

SandRidge Mississippian Trust I
US ˙ OTCPK

Mga Batayang Estadistika
CIK 1509228
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 SandRidge Mississippian Trust I
SEC Filings (Chronological Order)
Halaman ini menyediakan daftar lengkap dan kronologis dari Pengajuan SEC, tidak termasuk pengajuan kepemilikan yang kami sediakan di tempat lain.
September 9, 2021 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

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: 001-35122 SANDRIDGE MISSISSIPPIAN TRUST I (Exact name of registrant as spec

August 13, 2021 10-Q

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

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q (Mark One) ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2021 OR o 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: 001-35122 SANDRIDGE

July 27, 2021 EX-99.1

SandRidge Mississippian Trust I Announces Update Regarding Future Distribution of Net Asset Sale Proceeds

Exhibit 99.1 SandRidge Mississippian Trust I Announces Update Regarding Future Distribution of Net Asset Sale Proceeds SANDRIDGE MISSISSIPPIAN TRUST I The Bank of New York Mellon Trust Company, N.A., Trustee News Release For Immediate Release HOUSTON, Texas July 27, 2021 ? SANDRIDGE MISSISSIPPIAN TRUST I (OTC: SDTTU) today announced that because of the statutory requirement to provide for the Trus

July 27, 2021 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): July 27, 2021 SANDRIDGE MISSISSIPPIAN TRUST I (Exact name of Registrant as specified in its charter) Delaware 001-35122 27-6990649 (State or other jurisdiction of incorporation or org

May 14, 2021 10-Q

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

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q (Mark One) ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2021 OR o 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: 001-35122 SANDRIDGE

April 26, 2021 EX-99.1

SandRidge Mississippian Trust I Announces Quarterly Distribution and Completion of Sale of Assets

Exhibit 99.1 SandRidge Mississippian Trust I Announces Quarterly Distribution and Completion of Sale of Assets SANDRIDGE MISSISSIPPIAN TRUST I The Bank of New York Mellon Trust Company, N.A., Trustee News Release For Immediate Release HOUSTON, Texas April 26, 2021 ? SANDRIDGE MISSISSIPPIAN TRUST I (OTC: SDTTU) today announced a quarterly distribution for the three-month period ended March 31, 2021

April 26, 2021 EX-10.1

Purchase and Sale Agreement dated as of April 22, 2021 between SandRidge Exploration and Production, LLC and SandRidge Mississippian Trust I.

Exhibit 10.1 Execution Form PURCHASE AND SALE AGREEMENT This Purchase and Sale Agreement (?Agreement?) is made and entered into as of April 22, 2021, by and among SANDRIDGE MISSISSIPPIAN TRUST I, a Delaware statutory trust (?Seller?), for which The Bank of New York Mellon Trust Company, N.A. acts as trustee (the ?Trustee?), and SANDRIDGE EXPLORATION AND PRODUCTION, LLC, a Delaware limited liabilit

April 26, 2021 8-K

Entry into a Material Definitive Agreement

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 22, 2021 SANDRIDGE MISSISSIPPIAN TRUST I (Exact name of Registrant as specified in its charter) Delaware 001-35122 27-6990649 (State or other jurisdiction of incorporation or or

March 24, 2021 EX-99.1

Report of Cawley, Gillespie & Associates, Inc.

Exhibit 99.1 January 25, 2021 Mr. Grayson R. Pranin SandRidge Energy, Inc. 1 East Sheridan Avenue Oklahoma City, Oklahoma 73104 The Bank of New York Mellon Trust Company, N.A. As Trustee of SandRidge Mississippian Trust I 601 Travis, Floor 16 Houston, Texas 77002 Re: Evaluation Summary SandRidge Mississippian Trust I Interests Proved Reserves As of January 1, 2021 Ladies and Gentlemen: As requeste

March 24, 2021 10-K

Annual Report - 10-K

10-K 1 a202010ksdt.htm 10-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-K (Mark One) þ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2020 OR o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Numb

March 11, 2021 POS AM

- POS AM

POS AM 1 tm219395d1posam.htm POS AM As filed with the Securities and Exchange Commission on March 11, 2021 Registration Statement File No. 333-184561 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 POST-EFFECTIVE AMENDMENT NO. 1 TO FORM S-3 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 SANDRIDGE MISSISSIPPIAN TRUST I SANDRIDGE ENERGY, INC. (Exact name of registran

January 28, 2021 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): January 28, 2021 SANDRIDGE MISSISSIPPIAN TRUST I (Exact name of Registrant as specified in its charter) Delaware 001-35122 27-6990649 (State or other jurisdiction of incorporation or

January 28, 2021 EX-99.1

SandRidge Mississippian Trust I Announces Quarterly Distribution

Exhibit 99.1 SandRidge Mississippian Trust I Announces Quarterly Distribution SANDRIDGE MISSISSIPPIAN TRUST I The Bank of New York Mellon Trust Company, N.A., Trustee News Release For Immediate Release HOUSTON, Texas January 28, 2021 — SANDRIDGE MISSISSIPPIAN TRUST I (OTC: SDTTU) today announced a quarterly distribution for the three-month period ended December 31, 2020 (which primarily relates to

January 8, 2021 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): January 6, 2021 SANDRIDGE MISSISSIPPIAN TRUST I (Exact name of Registrant as specified in its charter) Delaware 001-35122 27-6990649 (State or other jurisdiction of incorporation or o

January 8, 2021 EX-10.1

Amendment No. 1 to Administrative Services Agreement dated as of November 13, 2020 between SandRidge Energy, Inc. and SandRidge Mississippian Trust I

Exhibit 10.1 AMENDMENT NO. 1 TO ADMINISTRATIVE SERVICES AGREEMENT This Amendment No. 1 to Administrative Services Agreement (this “Amendment”), dated as of November 13, 2020, is made by SandRidge Energy, Inc., a Delaware corporation (the “Company”), and SandRidge Mississippian Trust I, a statutory trust formed under the laws of the State of Delaware (the “Trust”). Capitalized terms used but not de

December 11, 2020 SC 13D/A

SDT / SandRidge Mississippian Trust I / Olesen Value Fund L.P. - FORM SC 13D/A Activist Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D/A INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO RULE 13d-1(a) AND AMENDMENTS THERETO FILED PURSUANT TO RULE 13d-2(a) Under the Securities Exchange Act of 1934 (Amendment No. 3) SANDRIDGE MISSISSIPPIAN TRUST I (Name of Issuer) Common units of beneficial interest (Title of Class of Securities) 80007T101

November 12, 2020 10-Q

Quarterly Report - 10-Q

10-Q 1 sdt3q202010q9302020.htm 10-Q UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q (Mark One) þ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2020 OR o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Com

October 23, 2020 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): October 23, 2020 SANDRIDGE MISSISSIPPIAN TRUST I (Exact name of Registrant as specified in its charter) Delaware 001-35122 27-6990649 (State or other jurisdiction of incorporation or

October 23, 2020 EX-99.1

SandRidge Mississippian Trust I Announces There Will Be No Quarterly Distribution in November 2020 and Trust Dissolution Trigger Date

Exhibit 99.1 SandRidge Mississippian Trust I Announces There Will Be No Quarterly Distribution in November 2020 and Trust Dissolution Trigger Date SANDRIDGE MISSISSIPPIAN TRUST I The Bank of New York Mellon Trust Company, N.A., Trustee News Release For Immediate Release HOUSTON, Texas October 23, 2020 — SANDRIDGE MISSISSIPPIAN TRUST I (OTC: SDTTU) today announced that there will be no distribution

September 8, 2020 SC 13D

SDT / SandRidge Mississippian Trust I / Olesen Value Fund L.P. - FORM SC 13D Activist Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D Under the Securities Exchange Act of 1934 (Amendment No. ) SANDRIDGE MISSISSIPPIAN TRUST I (Name of Issuer) Common units of beneficial interest (Title of Class of Securities) 80007T101 (CUSIP Number) Christian Olesen, Olesen Value Fund L.P., 60 W. Broad Street, Suite 104, Bethlehem, PA 18018 (610) 866 6200 (Name,

August 13, 2020 10-Q

Quarterly Report - 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q (Mark One) þ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2020 OR o 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: 001-35122 SANDRIDGE

July 23, 2020 EX-99.1

SandRidge Mississippian Trust I Announces There Will Be No Quarterly Distribution in August 2020

Exhibit 99.1 SandRidge Mississippian Trust I Announces There Will Be No Quarterly Distribution in August 2020 SANDRIDGE MISSISSIPPIAN TRUST I The Bank of New York Mellon Trust Company, N.A., Trustee News Release For Immediate Release HOUSTON, Texas July 23, 2020 — SANDRIDGE MISSISSIPPIAN TRUST I (OTC: SDTTU) today announced that there will be no distribution paid for the three-month period ended J

July 23, 2020 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): July 23, 2020 SANDRIDGE MISSISSIPPIAN TRUST I (Exact name of Registrant as specified in its charter) Delaware 001-35122 27-6990649 (State or other jurisdiction of incorporation or org

May 14, 2020 10-Q

Quarterly Report - 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q (Mark One) þ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2020 OR o 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: 001-35122 SANDRIDGE

April 23, 2020 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): April 23, 2020 SANDRIDGE MISSISSIPPIAN TRUST I (Exact name of Registrant as specified in its charter) Delaware 001-35122 27-6990649 (State or other jurisdiction of incorporation or or

April 23, 2020 EX-99.1

SandRidge Mississippian Trust I Announces Quarterly Distribution

Exhibit 99.1 SandRidge Mississippian Trust I Announces Quarterly Distribution SANDRIDGE MISSISSIPPIAN TRUST I The Bank of New York Mellon Trust Company, N.A., Trustee News Release For Immediate Release HOUSTON, Texas April 23, 2020 — SANDRIDGE MISSISSIPPIAN TRUST I (OTC: SDTTU) today announced a quarterly distribution for the three-month period ended March 31, 2020 (which primarily relates to prod

March 12, 2020 10-K

SDT / SandRidge Mississippian Trust I 10-K - Annual Report - 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-K (Mark One) þ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2019 OR o 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: 001-35122 SANDRIDGE MISS

March 12, 2020 EX-99.1

Report of Cawley, Gillespie & Associates, Inc.

Exhibit 99.1 January 22, 2020 Mr. Lance J. Galvin SandRidge Energy, Inc. 123 Robert S. Kerr Avenue Oklahoma City, Oklahoma 73102 The Bank of New York Mellon Trust Company, N.A. As Trustee of SandRidge Mississippian Trust I 919 Congress Avenue, Suite 500 Austin, Texas 78701 Re: Evaluation Summary SandRidge Mississippian Trust I Interests Proved Reserves As of January 1, 2020 Ladies and Gentlemen: A

March 12, 2020 EX-4.1

Description of Securities Registered Pursuant to Section 12 of the Securities Act of 1934

Exhibit 4.1 DESCRIPTION OF THE REGISTRANT’S SECURITIES REGISTERED PURSUANT TO SECTION 12 OF THE SECURITIES EXCHANGE ACT OF 1934 SandRidge Mississippian Trust I (the “Trust”) has one class of securities registered under Section 12 of the Securities Exchange Act of 1934, as amended: its Common Units of Beneficial Interest, which are referred to in this exhibit as “Trust units.” Description of Trust

January 23, 2020 EX-99.1

SandRidge Mississippian Trust I Announces Quarterly Distribution

Exhibit 99.1 SandRidge Mississippian Trust I Announces Quarterly Distribution SANDRIDGE MISSISSIPPIAN TRUST I The Bank of New York Mellon Trust Company, N.A., Trustee News Release For Immediate Release HOUSTON, Texas January 23, 2020 — SANDRIDGE MISSISSIPPIAN TRUST I (OTC: SDTTU) today announced a quarterly distribution for the three-month period ended December 31, 2019 (which primarily relates to

January 23, 2020 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): January 23, 2020 SANDRIDGE MISSISSIPPIAN TRUST I (Exact name of Registrant as specified in its charter) Delaware 001-35122 27-6990649 (State or other jurisdiction of incorporation or

December 4, 2019 EX-99.25

EX-99.25

NOTIFICATION OF THE REMOVAL FROM LISTING AND REGISTRATION OF THE STATED SECURITIES The New York Stock Exchange ('NYSE' or the 'Exchange') hereby notifies the Securities and Exchange Commission (the 'Commission') of its intention to remove the Units of Beneficial Interest (the 'Units') of SandRidge Mississippian Trust I (the 'Company') from listing and registration on the Exchange at the opening of business on December 16, 2019, pursuant to the provisions of Rule 12d2-2(b) because, in the opinion of the Exchange, the Units are no longer suitable for continued listing and trading on the Exchange.

November 19, 2019 EX-99.1

Contact: SandRidge Mississippian Trust I The Bank of New York Mellon Trust Company, N.A., as Trustee Sarah Newell 1(512) 236-6555

Exhibit 99.1 SandRidge Mississippian Trust I Provides Update on NYSE Delisting SANDRIDGE MISSISSIPPIAN TRUST I The Bank of New York Mellon Trust Company, N.A., Trustee News Release For Immediate Release HOUSTON, Texas November 19, 2019 — SANDRIDGE MISSISSIPPIAN TRUST I (NYSE: SDT) today announced that it has received notification from the New York Stock Exchange (“NYSE”) of its determination to su

November 19, 2019 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): November 18, 2019 SANDRIDGE MISSISSIPPIAN TRUST I (Exact name of Registrant as specified in its charter) Delaware 001-35122 27-6990649 (State or other jurisdiction of incorporation or

November 7, 2019 10-Q

SDT / SandRidge Mississippian Trust I 10-Q - Quarterly Report - 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q (Mark One) þ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2019 OR o 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: 001-35122 SANDR

October 25, 2019 EX-99.1

$

Exhibit 99.1 SandRidge Mississippian Trust I Announces Quarterly Distribution SANDRIDGE MISSISSIPPIAN TRUST I The Bank of New York Mellon Trust Company, N.A., Trustee News Release For Immediate Release HOUSTON, Texas October 24, 2019 — SANDRIDGE MISSISSIPPIAN TRUST I (NYSE: SDT) today announced a quarterly distribution for the three-month period ended September 30, 2019 (which primarily relates to

October 25, 2019 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): October 24, 2019 SANDRIDGE MISSISSIPPIAN TRUST I (Exact name of Registrant as specified in its charter) Delaware 001-35122 27-6990649 (State or other jurisdiction of incorporation or

August 13, 2019 10-Q

SDT / SandRidge Mississippian Trust I 10-Q - Quarterly Report - 10-Q

10-Q 1 sdtq2201910q.htm 10-Q UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q (Mark One) þ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2019 OR o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File

July 25, 2019 EX-99.1

$

Exhibit 99.1 SandRidge Mississippian Trust I Announces Quarterly Distribution SANDRIDGE MISSISSIPPIAN TRUST I The Bank of New York Mellon Trust Company, N.A., Trustee News Release For Immediate Release HOUSTON, Texas July 25, 2019 — SANDRIDGE MISSISSIPPIAN TRUST I (NYSE: SDT) today announced a quarterly distribution for the three-month period ended June 30, 2019 (which primarily relates to product

July 25, 2019 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): July 25, 2019 SANDRIDGE MISSISSIPPIAN TRUST I (Exact name of Registrant as specified in its charter) Delaware 001-35122 27-6990649 (State or other jurisdiction of incorporation or org

June 24, 2019 8-K/A

Changes in Registrant's Certifying Accountant

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K/A (Amendment No. 1) 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, 2019 SANDRIDGE MISSISSIPPIAN TRUST I (Exact name of Registrant as specified in its charter) Delaware 001-35122 27-6990649 (State or other jurisdiction of in

May 20, 2019 EX-99.1

SandRidge Mississippian Trust I Announces Receipt of Notice from NYSE Regarding Continued Listing Standards

SandRidge Mississippian Trust I Announces Receipt of Notice from NYSE Regarding Continued Listing Standards SANDRIDGE MISSISSIPPIAN TRUST I The Bank of New York Mellon Trust Company, N.

May 20, 2019 8-K

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

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 16, 2019 SANDRIDGE MISSISSIPPIAN TRUST I (Exact name of Registrant as specified in its charter) Delaware 001-35122 27-6990649 (State or other jurisdiction of incorporation or orga

May 14, 2019 EX-16.1

Letter of PricewaterhouseCoopers LLP

Exhibit 16.1 May 14, 2019 Securities and Exchange Commission 100 F Street, N.E. Washington, DC 20549 Commissioners: We have read the statements made by SandRidge Mississippian Trust I (copy attached), which we understand will be filed with the Securities and Exchange Commission, pursuant to Item 4.01 of Form 8-K of SandRidge Mississippian Trust I dated May 8, 2019. We agree with the statements con

May 14, 2019 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 8, 2019 SANDRIDGE MISSISSIPPIAN TRUST I (Exact name of Registrant as specified in its charter) Delaware 001-35122 27-6990649 (State or other jurisdiction of incorporation or organ

May 9, 2019 10-Q

SDT / SandRidge Mississippian Trust I 10-Q Quarterly Report 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q (Mark One) þ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2019 OR o 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: 001-35122 SANDRIDGE

April 25, 2019 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): April 25, 2019 SANDRIDGE MISSISSIPPIAN TRUST I (Exact name of Registrant as specified in its charter) Delaware 001-35122 27-6990649 (State or other jurisdiction of incorporation or or

April 25, 2019 EX-99.1

$

Exhibit 99.1 SandRidge Mississippian Trust I Announces Quarterly Distribution SANDRIDGE MISSISSIPPIAN TRUST I The Bank of New York Mellon Trust Company, N.A., Trustee News Release For Immediate Release HOUSTON, Texas April 25, 2019 — SANDRIDGE MISSISSIPPIAN TRUST I (NYSE: SDT) today announced a quarterly distribution for the three-month period ended March 31, 2019 (which primarily relates to produ

March 14, 2019 10-K

SDT / SandRidge Mississippian Trust I 10-K (Annual Report)

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-K (Mark One) þ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2018 OR o 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: 001-35122 SANDRIDGE MISS

March 14, 2019 EX-99.1

Report of Cawley, Gillespie & Associates, Inc.

Exhibit 99.1 January 30, 2019 Mr. Lance J. Galvin SandRidge Energy, Inc. 123 Robert S. Kerr Avenue Oklahoma City, Oklahoma 73102 The Bank of New York Mellon Trust Company, N.A. As Trustee of SandRidge Mississippian Trust I 919 Congress Avenue, Suite 500 Austin, Texas 78701 Re: Evaluation Summary SandRidge Mississippian Trust I Interests Proved Reserves As of January 1, 2019 Ladies and Gentlemen: A

January 24, 2019 EX-99.1

$

Exhibit 99.1 SandRidge Mississippian Trust I Announces Quarterly Distribution SANDRIDGE MISSISSIPPIAN TRUST I The Bank of New York Mellon Trust Company, N.A., Trustee News Release For Immediate Release HOUSTON, Texas January 24, 2019 — SANDRIDGE MISSISSIPPIAN TRUST I (NYSE: SDT) today announced a quarterly distribution for the three-month period ended December 31, 2018 (which primarily relates to

January 24, 2019 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): January 24, 2019 SANDRIDGE MISSISSIPPIAN TRUST I (Exact name of Registrant as specified in its charter) Delaware 001-35122 27-6990649 (State or other jurisdiction of incorporation or

January 4, 2019 EX-99.1

SandRidge Mississippian Trust I Announces Receipt of Notice from NYSE Regarding Continued Listing Standards

Exhibit 99.1 SandRidge Mississippian Trust I Announces Receipt of Notice from NYSE Regarding Continued Listing Standards SANDRIDGE MISSISSIPPIAN TRUST I The Bank of New York Mellon Trust Company, N.A., Trustee News Release For Immediate Release HOUSTON, Texas January 4, 2019 - SANDRIDGE MISSISSIPPIAN TRUST I (NYSE: SDT) (the “Trust”) announced today that it has received a notice from the New York

January 4, 2019 8-K

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

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 31, 2018 SANDRIDGE MISSISSIPPIAN TRUST I (Exact name of Registrant as specified in its charter) Delaware 001-35122 27-6990649 (State or other jurisdiction of incorporation or

December 19, 2018 EX-99.1

Contact: SandRidge Mississippian Trust I The Bank of New York Mellon Trust Company, N.A., as Trustee Sarah Newell 1(512) 236-6555

Exhibit 99.1 SandRidge Mississippian Trust I Announces Planned Increase in Existing Cash Reserve SANDRIDGE MISSISSIPPIAN TRUST I The Bank of New York Mellon Trust Company, N.A., Trustee News Release For Immediate Release HOUSTON, Texas December 19, 2018 — SANDRIDGE MISSISSIPPIAN TRUST I (NYSE: SDT)(the “Trust”) today announced that its trustee, The Bank of New York Mellon Trust Company, N.A. (the

December 19, 2018 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): December 19, 2018 SANDRIDGE MISSISSIPPIAN TRUST I (Exact name of Registrant as specified in its charter) Delaware 001-35122 27-6990649 (State or other jurisdiction of incorporation or

November 8, 2018 10-Q

SDT / SandRidge Mississippian Trust I 10-Q (Quarterly Report)

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q (Mark One) þ 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 o 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: 001-35122 SANDR

October 25, 2018 EX-99.1

$

Exhibit 99.1 SandRidge Mississippian Trust I Announces Quarterly Distribution SANDRIDGE MISSISSIPPIAN TRUST I The Bank of New York Mellon Trust Company, N.A., Trustee News Release For Immediate Release HOUSTON, Texas October 25, 2018 — SANDRIDGE MISSISSIPPIAN TRUST I (NYSE: SDT) today announced a quarterly distribution for the three-month period ended September 30, 2018 (which primarily relates to

October 25, 2018 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): October 25, 2018 SANDRIDGE MISSISSIPPIAN TRUST I (Exact name of Registrant as specified in its charter) Delaware 001-35122 27-6990649 (State or other jurisdiction of incorporation or

August 9, 2018 10-Q

SDT / SandRidge Mississippian Trust I 10-Q (Quarterly Report)

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q (Mark One) þ 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 o 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: 001-35122 SANDRIDGE

July 26, 2018 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): July 26, 2018 SANDRIDGE MISSISSIPPIAN TRUST I (Exact name of Registrant as specified in its charter) Delaware 001-35122 27-6990649 (State or other jurisdiction of incorporation or org

July 26, 2018 EX-99.1

$

Exhibit 99.1 SandRidge Mississippian Trust I Announces Quarterly Distribution SANDRIDGE MISSISSIPPIAN TRUST I The Bank of New York Mellon Trust Company, N.A., Trustee News Release For Immediate Release HOUSTON, Texas July 26, 2018 — SANDRIDGE MISSISSIPPIAN TRUST I (NYSE: SDT) today announced a quarterly distribution for the three-month period ended June 30, 2018 (which primarily relates to product

June 12, 2018 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 12, 2018 (June 4, 2018) SANDRIDGE MISSISSIPPIAN TRUST I (Exact name of Registrant as specified in its charter) Delaware 001-35122 27-6990649 (State or other jurisdiction of incor

May 8, 2018 10-Q

SDT / SandRidge Mississippian Trust I 10-Q (Quarterly Report)

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q (Mark One) þ 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 o 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: 001-35122 SANDRIDGE

April 26, 2018 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): April 26, 2018 SANDRIDGE MISSISSIPPIAN TRUST I (Exact name of Registrant as specified in its charter) Delaware 001-35122 27-6990649 (State or other jurisdiction of incorporation or or

April 26, 2018 EX-99.1

$

Exhibit 99.1 SandRidge Mississippian Trust I Announces Quarterly Distribution SANDRIDGE MISSISSIPPIAN TRUST I The Bank of New York Mellon Trust Company, N.A., Trustee News Release For Immediate Release HOUSTON, Texas April 26, 2018 — SANDRIDGE MISSISSIPPIAN TRUST I (NYSE: SDT) today announced a quarterly distribution for the three-month period ended March 31, 2018 (which primarily relates to produ

March 9, 2018 10-K

SDT / SandRidge Mississippian Trust I 10-K (Annual Report)

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-K (Mark One) þ 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 o 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: 001-35122 SANDRIDGE MISS

March 9, 2018 EX-99.1

Report of Cawley, Gillespie & Associates, Inc.

EX-99.1 6 cgsdt2017reportletter.htm EXHIBIT 99.1 Exhibit 99.1 January 26, 2018 Mr. Lance J. Galvin SandRidge Energy, Inc. 123 Robert S. Kerr Avenue Oklahoma City, Oklahoma 73102 The Bank of New York Mellon Trust Company, N.A. As Trustee of SandRidge Mississippian Trust I 919 Congress Avenue, Suite 500 Austin, Texas 78701 Re: Evaluation Summary SandRidge Mississippian Trust I Interests Proved Reser

January 25, 2018 8-K

SDT / SandRidge Mississippian Trust I 8-K (Current Report)

Document 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 25, 2018 SANDRIDGE MISSISSIPPIAN TRUST I (Exact name of Registrant as specified in its charter) Delaware 001-35122 27-6990649 (State or other jurisdiction of incorpor

January 25, 2018 EX-99.1

$

Exhibit Exhibit 99.1 SandRidge Mississippian Trust I Announces Quarterly Distribution SANDRIDGE MISSISSIPPIAN TRUST I The Bank of New York Mellon Trust Company, N.A., Trustee News Release For Immediate Release HOUSTON, Texas January 25, 2018 ? SANDRIDGE MISSISSIPPIAN TRUST I (NYSE: SDT) today announced a quarterly distribution for the three-month period ended December 31, 2017 (which primarily rel

January 12, 2018 EX-99.1

SandRidge Mississippian Trust I Announces Receipt of Notice from NYSE Regarding Continued Listing Standards

Exhibit SandRidge Mississippian Trust I Announces Receipt of Notice from NYSE Regarding Continued Listing Standards SANDRIDGE MISSISSIPPIAN TRUST I The Bank of New York Mellon Trust Company, N.

January 12, 2018 8-K

SDT / SandRidge Mississippian Trust I 8-K (Current Report)

Document 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 8, 2018 SANDRIDGE MISSISSIPPIAN TRUST I (Exact name of Registrant as specified in its charter) Delaware 001-35122 27-6990649 (State or other jurisdiction of incorpora

November 15, 2017 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): November 8, 2017 SANDRIDGE MISSISSIPPIAN TRUST I (Exact name of Registrant as specified in its charter) Delaware 001-35122 27-6990649 (State or other jurisdiction of incorporation or

November 7, 2017 10-Q

SDT / SandRidge Mississippian Trust I 10-Q (Quarterly Report)

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q (Mark One) þ 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 o 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: 001-35122 SANDR

October 26, 2017 EX-99.1

$

Exhibit Exhibit 99.1 SandRidge Mississippian Trust I Announces Quarterly Distribution SANDRIDGE MISSISSIPPIAN TRUST I The Bank of New York Mellon Trust Company, N.A., Trustee News Release For Immediate Release AUSTIN, Texas October 26, 2017 ? SANDRIDGE MISSISSIPPIAN TRUST I (NYSE: SDT) today announced a quarterly distribution for the three-month period ended September 30, 2017 (which primarily rel

October 26, 2017 8-K

Current Report

Document 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 26, 2017 SANDRIDGE MISSISSIPPIAN TRUST I (Exact name of Registrant as specified in its charter) Delaware 001-35122 27-6990649 (State or other jurisdiction of incorpor

August 8, 2017 10-Q

SDT / SandRidge Mississippian Trust I 10-Q (Quarterly Report)

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q (Mark One) x 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 o 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: 00

July 27, 2017 8-K

SandRidge Mississippian Trust I 8-K (Current Report/Significant Event)

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 27, 2017 SANDRIDGE MISSISSIPPIAN TRUST I (Exact name of Registrant as specified in its charter) Delaware 001-35122 27-6990649 (State or other jurisdiction of incorporation or org

July 27, 2017 EX-99.1

SandRidge Mississippian Trust I Announces Quarterly Distribution

Exhibit 99.1 SandRidge Mississippian Trust I Announces Quarterly Distribution SANDRIDGE MISSISSIPPIAN TRUST I The Bank of New York Mellon Trust Company, N.A., Trustee News Release For Immediate Release AUSTIN, Texas July 27, 2017 ? SANDRIDGE MISSISSIPPIAN TRUST I (NYSE: SDT) today announced a quarterly distribution for the three-month period ended June 30, 2017 (which primarily relates to producti

May 10, 2017 10-Q

SandRidge Mississippian Trust I 10-Q (Quarterly Report)

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q (Mark One) x 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 o 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: 0

April 27, 2017 EX-99.1

SandRidge Mississippian Trust I Announces Quarterly Distribution

Exhibit 99.1 SandRidge Mississippian Trust I Announces Quarterly Distribution SANDRIDGE MISSISSIPPIAN TRUST I The Bank of New York Mellon Trust Company, N.A., Trustee News Release For Immediate Release AUSTIN, Texas April 27, 2017 ? SANDRIDGE MISSISSIPPIAN TRUST I (NYSE: SDT) today announced a quarterly distribution for the three-month period ended March 31, 2017 (which primarily relates to produc

April 27, 2017 8-K

SandRidge Mississippian Trust I 8-K (Current Report/Significant Event)

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 27, 2017 SANDRIDGE MISSISSIPPIAN TRUST I (Exact name of Registrant as specified in its charter) Delaware 001-35122 27-6990649 (State or other jurisdiction of incorporation or or

March 16, 2017 10-K

SandRidge Mississippian Trust I 10-K (Annual Report)

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-K (Mark One) x 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 o 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 16, 2017 EX-99.1

February 8, 2017

EX-99.1 6 a17-11351ex99d1.htm EX-99.1 Exhibit 99.1 February 8, 2017 Mr. Lance J. Galvin SandRidge Energy, Inc. 123 Robert S. Kerr Avenue Oklahoma City, Oklahoma 73102 The Bank of New York Mellon Trust Company, N.A. As Trustee of SandRidge Mississippian Trust I 919 Congress Avenue, Suite 500 Austin, Texas 78701 Re: Evaluation Summary SandRidge Mississippian Trust I Interests Proved Reserves As of J

January 26, 2017 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): January 26, 2017 SANDRIDGE MISSISSIPPIAN TRUST I (Exact name of Registrant as specified in its charter) Delaware 001-35122 27-6990649 (State or other jurisdiction of incorporation or

January 26, 2017 EX-99.1

SandRidge Mississippian Trust I Announces Quarterly Distribution

Exhibit 99.1 SandRidge Mississippian Trust I Announces Quarterly Distribution SANDRIDGE MISSISSIPPIAN TRUST I The Bank of New York Mellon Trust Company, N.A., Trustee News Release For Immediate Release AUSTIN, Texas January 26, 2017 ? SANDRIDGE MISSISSIPPIAN TRUST I (NYSE: SDT) today announced a quarterly distribution for the three-month period ended December 31, 2016 (which primarily relates to p

November 7, 2016 10-Q

SandRidge Mississippian Trust I 10-Q (Quarterly Report)

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q (Mark One) x QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2016 OR o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Numbe

October 27, 2016 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): October 27, 2016 SANDRIDGE MISSISSIPPIAN TRUST I (Exact name of Registrant as specified in its charter) Delaware 001-35122 27-6990649 (State or other jurisdiction of incorporation or

October 27, 2016 EX-99.1

SandRidge Mississippian Trust I Announces Quarterly Distribution

Exhibit 99.1 SandRidge Mississippian Trust I Announces Quarterly Distribution SANDRIDGE MISSISSIPPIAN TRUST I The Bank of New York Mellon Trust Company, N.A., Trustee News Release For Immediate Release AUSTIN, Texas October 27, 2016 ? SANDRIDGE MISSISSIPPIAN TRUST I (NYSE: SDT) today announced a quarterly distribution for the three-month period ended September 30, 2016 (which primarily relates to

August 8, 2016 10-Q

SandRidge Mississippian Trust I 10-Q (Quarterly Report)

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q (Mark One) x QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2016 OR o 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: 00

July 28, 2016 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): July 28, 2016 SANDRIDGE MISSISSIPPIAN TRUST I (Exact name of Registrant as specified in its charter) Delaware 001-35122 27-6990649 (State or other jurisdiction of incorporation or org

July 28, 2016 EX-99.1

SandRidge Mississippian Trust I Announces Quarterly Distribution

Exhibit 99.1 SandRidge Mississippian Trust I Announces Quarterly Distribution SANDRIDGE MISSISSIPPIAN TRUST I The Bank of New York Mellon Trust Company, N.A., Trustee News Release For Immediate Release AUSTIN, Texas July 28, 2016 ? SANDRIDGE MISSISSIPPIAN TRUST I (NYSE: SDT) today announced a quarterly distribution for the three-month period ended June 30, 2016 (which primarily relates to producti

May 10, 2016 10-Q

SandRidge Mississippian Trust I 10-Q (Quarterly Report)

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q (Mark One) x QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2016 OR o 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: 0

April 28, 2016 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): April 28, 2016 SANDRIDGE MISSISSIPPIAN TRUST I (Exact name of Registrant as specified in its charter) Delaware 001-35122 27-6990649 (State or other jurisdiction of incorporation or or

April 28, 2016 EX-99.1

SandRidge Mississippian Trust I Announces Quarterly Distribution

Exhibit 99.1 SandRidge Mississippian Trust I Announces Quarterly Distribution SANDRIDGE MISSISSIPPIAN TRUST I The Bank of New York Mellon Trust Company, N.A., Trustee News Release For Immediate Release AUSTIN, Texas April 28, 2016 ? SANDRIDGE MISSISSIPPIAN TRUST I (NYSE: SDT) today announced a quarterly distribution for the three-month period ended March 31, 2016 (which primarily relates to produc

March 16, 2016 10-K

SandRidge Mississippian Trust I 10-K (Annual Report)

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-K (Mark One) x ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2015 OR o 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 16, 2016 NT 10-K

SandRidge Mississippian Trust I NT 10-K

OMB APPROVAL UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 12b-25 NOTIFICATION OF LATE FILING OMB Number: 3235-0058 Expires: August 31, 2015 Estimated average burden hours per response . . . . . . 2.50 SEC FILE NUMBER 001-35122 CUSIP NUMBER 80007T101 (Check one): x Form 10-K o Form 20-F o Form 11-K o Form 10-Q o Form 10-D o Form N-SAR o Form N-CSR For Period Ended: D

March 16, 2016 EX-99.1

February 8, 2016

Exhibit 99.1 February 8, 2016 Mr. Lance J. Galvin SandRidge Energy, Inc. 123 Robert S. Kerr Avenue Oklahoma City, Oklahoma 73102 The Bank of New York Mellon Trust Company, N.A. As Trustee of SandRidge Mississippian Trust I 919 Congress Avenue, Suite 500 Austin, Texas 78701 Re: Evaluation Summary SandRidge Mississippian Trust I Interests Proved Reserves As of January 1, 2016 Ladies and Gentlemen: A

January 28, 2016 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): January 28, 2016 SANDRIDGE MISSISSIPPIAN TRUST I (Exact name of Registrant as specified in its charter) Delaware 001-35122 27-6990649 (State or other jurisdiction of incorporation or

January 28, 2016 EX-99.1

SandRidge Mississippian Trust I Announces Quarterly Distribution

Exhibit 99.1 SandRidge Mississippian Trust I Announces Quarterly Distribution SANDRIDGE MISSISSIPPIAN TRUST I The Bank of New York Mellon Trust Company, N.A., Trustee News Release For Immediate Release AUSTIN, Texas January 28, 2016 ? SANDRIDGE MISSISSIPPIAN TRUST I (NYSE: SDT) today announced a quarterly distribution for the three-month period ended December 31, 2015 (which primarily relates to p

November 6, 2015 10-Q

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

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q (Mark One) x QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2015 OR o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Numbe

October 29, 2015 8-K

SandRidge Mississippian Trust I 8-K (Current Report/Significant Event)

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 29, 2015 SANDRIDGE MISSISSIPPIAN TRUST I (Exact name of Registrant as specified in its charter) Delaware 001-35122 27-6990649 (State or other jurisdiction of incorporation or

October 29, 2015 EX-99.1

SandRidge Mississippian Trust I Announces Quarterly Distribution

Exhibit 99.1 SandRidge Mississippian Trust I Announces Quarterly Distribution SANDRIDGE MISSISSIPPIAN TRUST I The Bank of New York Mellon Trust Company, N.A., Trustee News Release For Immediate Release AUSTIN, Texas October 29, 2015 ? SANDRIDGE MISSISSIPPIAN TRUST I (NYSE: SDT) today announced a quarterly distribution for the three-month period ended September 30, 2015 (which primarily relates to

August 7, 2015 10-Q

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

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q (Mark One) x QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2015 OR o 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: 00

July 30, 2015 8-K

SandRidge Mississippian Trust I 8-K (Current Report/Significant Event)

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 30, 2015 SANDRIDGE MISSISSIPPIAN TRUST I (Exact name of Registrant as specified in its charter) Delaware 001-35122 27-6990649 (State or other jurisdiction of incorporation or org

July 30, 2015 EX-99.1

SandRidge Mississippian Trust I Announces Quarterly Distribution

Exhibit 99.1 SandRidge Mississippian Trust I Announces Quarterly Distribution SANDRIDGE MISSISSIPPIAN TRUST I The Bank of New York Mellon Trust Company, N.A., Trustee News Release For Immediate Release AUSTIN, Texas July 30, 2015 ? SANDRIDGE MISSISSIPPIAN TRUST I (NYSE: SDT) today announced a quarterly distribution for the three-month period ended June 30, 2015 (which primarily relates to producti

May 11, 2015 10-Q

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

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q (Mark One) x QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2015 OR o 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: 0

April 30, 2015 EX-99.1

SandRidge Mississippian Trust I Announces Quarterly Distribution

Exhibit 99.1 SandRidge Mississippian Trust I Announces Quarterly Distribution SANDRIDGE MISSISSIPPIAN TRUST I The Bank of New York Mellon Trust Company, N.A., Trustee News Release For Immediate Release AUSTIN, Texas April 30, 2015 ? SANDRIDGE MISSISSIPPIAN TRUST I (NYSE: SDT) today announced a quarterly distribution for the three-month period ended March 31, 2015 (which primarily relates to produc

April 30, 2015 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): April 30, 2015 SANDRIDGE MISSISSIPPIAN TRUST I (Exact name of Registrant as specified in its charter) Delaware 001-35122 27-6990649 (State or other jurisdiction of incorporation or or

March 13, 2015 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) x ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2014 OR o 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 13, 2015 EX-99.1

January 29, 2015

Exhibit 99.1 January 29, 2015 Mr. Lance J. Galvin SandRidge Energy, Inc. 123 Robert S. Kerr Avenue Oklahoma City, Oklahoma 73102 The Bank of New York Mellon Trust Company, N.A. As Trustee of SandRidge Mississippian Trust I 919 Congress Avenue, Suite 500 Austin, Texas 78701 Re: Evaluation Summary SandRidge Mississippian Trust I Interests Proved Reserves As of January 1, 2015 Ladies and Gentlemen: A

January 29, 2015 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): January 29, 2015 SANDRIDGE MISSISSIPPIAN TRUST I (Exact name of Registrant as specified in its charter) Delaware 001-35122 27-6990649 (State or other jurisdiction of incorporation or

January 29, 2015 EX-99.1

SandRidge Mississippian Trust I Announces Quarterly Distribution

Exhibit 99.1 SandRidge Mississippian Trust I Announces Quarterly Distribution SANDRIDGE MISSISSIPPIAN TRUST I The Bank of New York Mellon Trust Company, N.A., Trustee News Release For Immediate Release AUSTIN, Texas January 29, 2015 — SANDRIDGE MISSISSIPPIAN TRUST I (NYSE: SDT) today announced a quarterly distribution for the three-month period ended December 31, 2014 (which primarily relates to p

November 7, 2014 10-Q

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

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q (Mark One) x QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2014 OR o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Numbe

October 30, 2014 EX-99.1

SandRidge Mississippian Trust I Announces Quarterly Distribution

Exhibit 99.1 SandRidge Mississippian Trust I Announces Quarterly Distribution SANDRIDGE MISSISSIPPIAN TRUST I The Bank of New York Mellon Trust Company, N.A., Trustee News Release For Immediate Release AUSTIN, Texas October 30, 2014 — SANDRIDGE MISSISSIPPIAN TRUST I (NYSE: SDT) today announced a quarterly distribution for the three-month period ended September 30, 2014 (which primarily relates to

October 30, 2014 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): October 30, 2014 SANDRIDGE MISSISSIPPIAN TRUST I (Exact name of Registrant as specified in its charter) Delaware 001-35122 27-6990649 (State or other jurisdiction of incorporation or

August 8, 2014 10-Q

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

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q (Mark One) x QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2014 OR o 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: 00

July 31, 2014 EX-99.1

SandRidge Mississippian Trust I Announces Quarterly Distribution

Exhibit 99.1 SandRidge Mississippian Trust I Announces Quarterly Distribution SANDRIDGE MISSISSIPPIAN TRUST I The Bank of New York Mellon Trust Company, N.A., Trustee News Release For Immediate Release AUSTIN, Texas July 31, 2014 ? SANDRIDGE MISSISSIPPIAN TRUST I (NYSE: SDT) today announced a quarterly distribution for the three-month period ended June 30, 2014 (which primarily relates to producti

July 31, 2014 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 31, 2014 SANDRIDGE MISSISSIP

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 31, 2014 SANDRIDGE MISSISSIPPIAN TRUST I (Exact name of Registrant as specified in its charter) Delaware 001-35122 27-6990649 (State or other jurisdiction of incorporation or org

May 9, 2014 10-Q

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

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q (Mark One) x QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2014 OR o 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: 0

April 24, 2014 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): April 24, 2014 SANDRIDGE MISSISSIPPIAN TRUST I (Exact name of Registrant as specified in its charter) Delaware 001-35122 27-6990649 (State or other jurisdiction of incorporation or or

April 24, 2014 EX-99.1

Contact: SandRidge Mississippian Trust I The Bank of New York Mellon Trust Company, N.A., as Trustee Sarah Newell 1(512) 236-6531 919 Congress Avenue, Austin, TX 78701

Exhibit 99.1 SandRidge Mississippian Trust I Announces Quarterly Distribution SANDRIDGE MISSISSIPPIAN TRUST I The Bank of New York Mellon Trust Company, N.A., Trustee News Release For Immediate Release AUSTIN, Texas April 24, 2014 — SANDRIDGE MISSISSIPPIAN TRUST I (NYSE: SDT) today announced a quarterly distribution for the three-month period ended March 31, 2014 (which primarily relates to produc

March 14, 2014 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) x ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2013 OR o 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 14, 2014 EX-99.1

January 30, 2014

Exhibit 99.1 January 30, 2014 Mr. Lance J. Galvin SandRidge Energy, Inc. 123 Robert S. Kerr Avenue Oklahoma City, Oklahoma 73102 The Bank of New York Mellon Trust Company, N.A. As Trustee of SandRidge Mississippian Trust I 919 Congress Avenue, Suite 500 Austin, Texas 78701 Re: Evaluation Summary SandRidge Mississippian Trust I Interests Proved Reserves As of December 31, 2013 Ladies and Gentlemen:

January 30, 2014 EX-99.1

SandRidge Mississippian Trust I Announces Quarterly Distribution

Exhibit 99.1 SandRidge Mississippian Trust I Announces Quarterly Distribution SANDRIDGE MISSISSIPPIAN TRUST I The Bank of New York Mellon Trust Company, N.A., Trustee News Release For Immediate Release AUSTIN, Texas January 30, 2014 — SANDRIDGE MISSISSIPPIAN TRUST I (NYSE: SDT) today announced a quarterly distribution for the three-month period ended December 31, 2013 (which primarily relates to p

January 30, 2014 8-K

- CURRENT REPORT OF MATERIAL EVENTS OR CORPORATE CHANGES

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 30, 2014 SANDRIDGE MISSISSIPPIAN TRUST I (Exact name of Registrant as specified in its charter) Delaware 001-35122 27-6990649 (State or other jurisdiction of incorporation or

November 8, 2013 10-Q

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

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q (Mark One) x QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2013 OR o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Numbe

October 24, 2013 EX-99.1

SandRidge Mississippian Trust I Announces Quarterly Distribution

Exhibit 99.1 SandRidge Mississippian Trust I Announces Quarterly Distribution SANDRIDGE MISSISSIPPIAN TRUST I The Bank of New York Mellon Trust Company, N.A., Trustee News Release For Immediate Release AUSTIN, Texas October 24, 2013 — SANDRIDGE MISSISSIPPIAN TRUST I (NYSE: SDT) today announced a quarterly distribution for the three-month period ended September 30, 2013 (which primarily relates to

October 24, 2013 8-K

- CURRENT REPORT OF MATERIAL EVENTS OR CORPORATE CHANGES

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 24, 2013 SANDRIDGE MISSISSIPPIAN TRUST I (Exact name of Registrant as specified in its charter) Delaware 001-35122 27-6990649 (State or other jurisdiction of incorporation or

October 11, 2013 CORRESP

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SandRidge Mississippian Trust I October 11, 2013 Mr. Brad Skinner Senior Assistant Chief Accountant Division of Corporation Finance U.S. Securities and Exchange Commission 100 F Street, N.E. Washington, D.C. 20549-3628 Re: SandRidge Mississippian Trust I Form 10-K for the Fiscal Year Ended December 31, 2012 Filed March 15, 2013 Response Letter Dated August 21, 2013 File No. 001-35122 Dear Mr. Skin

September 27, 2013 CORRESP

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SandRidge Mississippian Trust I September 27, 2013 Filed via EDGAR Mr. Brad Skinner Senior Assistant Chief Accountant Division of Corporation Finance U.S. Securities and Exchange Commission 100 F Street, NE Washington, D.C. 20549-3628 Re: SandRidge Mississippian Trust I Form 10-K for the Fiscal Year Ended December 31, 2012 Filed March 15, 2013 Response Letter dated August 21, 2013 File No. 001-351

August 21, 2013 CORRESP

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CORRESP SandRidge Mississippian Trust I August 21, 2013 Mr. H. Roger Schwall Assistant Director Division of Corporation Finance U.S. Securities and Exchange Commission 100 F Street, N.E. Washington, D.C. 20549-3628 Re: SandRidge Mississippian Trust I Form 10-K for the Fiscal Year Ended December 31, 2012 Filed March 15, 2013 File No. 001-35122 Dear Mr. Schwall: SandRidge Mississippian Trust I (the

August 9, 2013 10-Q

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

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q (Mark One) x QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2013 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: 00

August 9, 2013 CORRESP

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CORRESP SandRidge Mississippian Trust I August 9, 2013 Filed via EDGAR Mr. H. Roger Schwall Assistant Director Division of Corporate Finance U.S. Securities and Exchange Commission 100 F Street, NE Washington, D.C. 20549-3628 Re: SandRidge Mississippian Trust I Form 10-K for the Fiscal Year Ended December 31, 2012 Filed March 15, 2013 File No. 001-35122 Dear Mr. Schwall, In response to your letter

July 25, 2013 8-K

- FORM 8-K

Form 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 25, 2013 SANDRIDGE MISSISSIPPIAN TRUST I (Exact name of Registrant as specified in its charter) Delaware 001-35122 27-6990649 (State or other jurisdiction of incorporati

July 25, 2013 EX-99.1

SandRidge Mississippian Trust I Announces Quarterly Distribution

EX-99.1 Exhibit 99.1 SandRidge Mississippian Trust I Announces Quarterly Distribution SANDRIDGE MISSISSIPPIAN TRUST I The Bank of New York Mellon Trust Company, N.A., Trustee News Release For Immediate Release AUSTIN, Texas July 25, 2013 — SANDRIDGE MISSISSIPPIAN TRUST I (NYSE: SDT) today announced a quarterly distribution for the three-month period ended June 30, 2013 (which primarily relates to

May 10, 2013 10-Q

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

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q (Mark One) x QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2013 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: 0

April 25, 2013 EX-99.1

SandRidge Mississippian Trust I Announces Quarterly Distribution

EX-99.1 Exhibit 99.1 SandRidge Mississippian Trust I Announces Quarterly Distribution SANDRIDGE MISSISSIPPIAN TRUST I The Bank of New York Mellon Trust Company, N.A., Trustee News Release For Immediate Release AUSTIN, Texas April 25, 2013 — SANDRIDGE MISSISSIPPIAN TRUST I (NYSE: SDT) today announced a quarterly distribution for the three-month period ended March 31, 2013 (which primarily relates t

April 25, 2013 8-K

- FORM 8-K

Form 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 25, 2013 SANDRIDGE MISSISSIPPIAN TRUST I (Exact name of Registrant as specified in its charter) Delaware 001-35122 27-6990649 (State or other jurisdiction of incorporat

March 15, 2013 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, 2012 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, 2013 EX-99.1

February 13, 2013

Exhibit 99.1 February 13, 2013 Mr. Rodney E. Johnson SandRidge Energy, Inc. 123 Robert S. Kerr Avenue Oklahoma City, Oklahoma 73102 Dear Mr. Johnson: In accordance with your request, we have estimated the proved reserves and future revenue, as of December 31, 2012, to the SandRidge Mississippian Trust I (SRMTI) royalty interest in certain oil and gas properties located in Oklahoma. We completed ou

January 31, 2013 EX-99.1

SandRidge Mississippian Trust I Announces Distribution of $0.650747 Per Unit

Press Release Exhibit 99.1 SandRidge Mississippian Trust I Announces Distribution of $0.650747 Per Unit SANDRIDGE MISSISSIPPIAN TRUST I The Bank of New York Mellon Trust Company, N.A., Trustee News Release For Immediate Release AUSTIN, Texas January 31, 2013 — SANDRIDGE MISSISSIPPIAN TRUST I (NYSE: SDT) today announced a quarterly distribution for the three-month period ended December 31, 2012 (wh

January 31, 2013 8-K

Current Report

Form 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 31, 2013 SANDRIDGE MISSISSIPPIAN TRUST I (Exact name of Registrant as specified in its charter) Delaware 001-35122 27-6990649 (State or other jurisdiction of incorpor

November 13, 2012 10-Q

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

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q (Mark One) ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2012 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 Numbe

November 1, 2012 EX-99.1

SandRidge Mississippian Trust I Announces Distribution of $0.683076 Per Unit

Press Release dated November 1, 2012 Exhibit 99.1 SandRidge Mississippian Trust I Announces Distribution of $0.683076 Per Unit SANDRIDGE MISSISSIPPIAN TRUST I The Bank of New York Mellon Trust Company, N.A., Trustee News Release For Immediate Release AUSTIN, Texas November 1, 2012 — SANDRIDGE MISSISSIPPIAN TRUST I (NYSE: SDT) today announced a quarterly distribution for the three-month period ende

November 1, 2012 8-K

- FORM 8-K

Form 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 1, 2012 SANDRIDGE MISSISSIPPIAN TRUST I (Exact name of Registrant as specified in its charter) Delaware 001-35122 27-6990649 (State or other jurisdiction of incorpor

October 24, 2012 S-3

- S-3

Use these links to rapidly review the document TABLE OF CONTENTS Table of Contents As filed with the Securities and Exchange Commission on October 23, 2012 Registration No.

October 9, 2012 SC 13D/A

SDT / SandRidge Mississippian Trust I / SANDRIDGE ENERGY INC - SCHEDULE 13D AMENDMENT NO 3 Activist Investment

Schedule 13D Amendment No 3 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.

August 13, 2012 10-Q

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

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q (Mark One) x QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2012 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: 00

August 13, 2012 EX-3.3

Amendment No. 1 to Amended and Restated Trust Agreement of SandRidge Mississippian Trust I, dated June 13, 2012, by the Bank of New York Mellon Trust Company, N.A.

Exhibit 3.3 AMENDMENT NO. 1 TO AMENDED AND RESTATED TRUST AGREEMENT OF SANDRIDGE MISSISSIPPIAN TRUST I WHEREAS, SandRidge Mississippian Trust I (the ?Trust?) has determined that defects exist in (i) the second sentence of Section 6.02(a) of the Amended and Restated Trust Agreement of the Trust, dated as of April 12, 2011 (?Trust Agreement?), in that the phrase ?an unsecured lien,? which has no cog

July 26, 2012 EX-99.1

Equivalent Producing Development Wells

Press Release dated July 26, 2012 Exhibit 99.1 SandRidge Mississippian Trust I Announces Distribution of $0.727696 Per Unit SANDRIDGE MISSISSIPPIAN TRUST I The Bank of New York Mellon Trust Company, N.A., Trustee News Release For Immediate Release AUSTIN, Texas July 26, 2012 — SANDRIDGE MISSISSIPPIAN TRUST I (NYSE: SDT) today announced a quarterly distribution for the three-month period ended June

July 26, 2012 8-K

- FORM 8-K

Form 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 26, 2012 SANDRIDGE MISSISSIPPIAN TRUST I (Exact name of Registrant as specified in its charter) Delaware 001-35122 27-6990649 (State or other jurisdiction of incorporati

June 20, 2012 SC 13D/A

SDT / SandRidge Mississippian Trust I / SANDRIDGE ENERGY INC - AMENDMENT NO. 2 TO SCHEDULE 13D Activist Investment

SC 13D/A 1 d369148dsc13da.htm AMENDMENT NO. 2 TO SCHEDULE 13D UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D Under the Securities Exchange Act of 1934 (Amendment No. 2) SandRidge Mississippian Trust I (Name of Issuer) Common Units of Beneficial Interest (Title of Class of Securities) 80007T 101 (CUSIP Number) Philip T. Warman Senior Vice President and General

May 14, 2012 10-Q

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

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q (Mark One) x QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2012 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: 0

April 30, 2012 8-K

- FORM 8-K

Form 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 30, 2012 SANDRIDGE MISSISSIPPIAN TRUST I (Exact name of Registrant as specified in its charter) Delaware 001-35122 27-6990649 (State or other jurisdiction of incorporat

April 30, 2012 EX-99.1

SandRidge Mississippian Trust I Announces Distribution of $0.79 Per Unit

Press Release dated April 30, 2012 Exhibit 99.1 SandRidge Mississippian Trust I Announces Distribution of $0.79 Per Unit SANDRIDGE MISSISSIPPIAN TRUST I The Bank of New York Mellon Trust Company, N.A., Trustee News Release For Immediate Release AUSTIN, Texas April 30, 2012 — SANDRIDGE MISSISSIPPIAN TRUST I (NYSE: SDT) today announced a quarterly distribution for the three-month period ended March

March 26, 2012 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) x ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2011 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 26, 2012 EX-99.1

February 3, 2012

Exhibit 99.1 ENGINEERING ? GEOLOGY ? GEOPHYSICS ? PETROPHYSICS CHAIRMAN & CEO C.H. (SCOTT) REES III PRESIDENT & COO DANNY D. SIMMONS EXECUTIVE VP G. LANCE BINDER EXECUTIVE COMMITTEE P. SCOTT FROST - DALLAS J. CARTER HENSON. JR. - HOUSTON DAN PAUL SMITH - DALLAS JOSEPH J. SPELLMAN - DALLAS THOMAS J. TELLA II - DALLAS February 3, 2012 Mr. Rodney E. Johnson SandRidge Energy, Inc. 123 Robert S. Kerr A

February 24, 2012 SC 13D/A

SDT / SandRidge Mississippian Trust I / SANDRIDGE ENERGY INC - SCHEDULE 13D AMENDMENT Activist Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D Under the Securities Exchange Act of 1934 (Amendment No. 1) SandRidge Mississippian Trust I (Name of Issuer) Common Units of Beneficial Interest (Title of Class of Securities) 80007T 101 (CUSIP Number) Philip T. Warman Senior Vice President and General Counsel SandRidge Energy, Inc. and SandRidge Exploration and P

February 2, 2012 EX-99.1

SandRidge Mississippian Trust I

Press Release dated February 2, 2012 Exhibit 99.1 SandRidge Mississippian Trust I SandRidge Mississippian Trust I Announces Distribution of $0.79 Per Unit SANDRIDGE MISSISSIPPIAN TRUST I The Bank of New York Mellon Trust Company, N.A., Trustee News Release For Immediate Release AUSTIN, Texas February 2, 2012 — SANDRIDGE MISSISSIPPIAN TRUST I (NYSE: SDT) today announced a quarterly distribution for

February 2, 2012 8-K

- FORM 8-K

Form 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 2, 2012 SANDRIDGE MISSISSIPPIAN TRUST I (Exact name of Registrant as specified in its charter) Delaware 001-35122 27-6990649 (State or other jurisdiction of incorpor

November 14, 2011 10-Q

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

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q (Mark One) ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2011 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 Numbe

October 28, 2011 EX-99.1

SandRidge Mississippian Trust I

Exhibit 99.1 SandRidge Mississippian Trust I SandRidge Mississippian Trust I Announces Distribution of $0.82 Per Unit SANDRIDGE MISSISSIPPIAN TRUST I The Bank of New York Mellon Trust Company, N.A., Trustee News Release For Immediate Release AUSTIN, Texas October 28, 2011 ? SANDRIDGE MISSISSIPPIAN TRUST I (NYSE: SDT) today announced a quarterly distribution for the period from June 1, 2011 through

October 28, 2011 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): October 28, 2011 SANDRIDGE MISSISSIPPIAN TRUST I (Exact name of Registrant as specified in its charter) Delaware 001-34800 20-8084793 (State or other jurisdiction of incorporation or

August 18, 2011 SC 13G/A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G UNDER THE SECURITIES EXCHANGE ACT OF 1934 (AMENDMENT NO. 1) SANDRIDGE MISSISSIPPIAN TRUST I (Name of Issuer) COMMON UNITS (Title of Class of Securities) (CUSIP Numbe

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G UNDER THE SECURITIES EXCHANGE ACT OF 1934 (AMENDMENT NO. 1) SANDRIDGE MISSISSIPPIAN TRUST I (Name of Issuer) COMMON UNITS (Title of Class of Securities) 80007T101 (CUSIP Number) Check the following box if a fee is being paid with this statement [ ]. (A fee is not required only if the filing person: (1) has a previ

August 15, 2011 10-Q

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

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q (Mark One) x QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2011 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: 00

July 22, 2011 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): July 22, 2011 SANDRIDGE MISSISSIPPIAN TRUST I (Exact name of Registrant as specified in its charter) Delaware 001-35122 27-6990649 (State or other jurisdiction of incorporation or org

July 22, 2011 EX-99.1

SandRidge Mississippian Trust I

Exhibit 99.1 SandRidge Mississippian Trust I SandRidge Mississippian Trust I Announces Distribution of $1.07 Per Unit SandRidge Mississippian Trust I The Bank of New York Mellon Trust Company, N.A., Trustee For Immediate Release AUSTIN, Texas July 22, 2011 ? SANDRIDGE MISSISSIPPIAN TRUST I (NYSE: SDT) announced today that its distribution for the period from January 1, 2011 through May 31, 2011 wi

May 27, 2011 SC 13G

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G UNDER THE SECURITIES EXCHANGE ACT OF 1934 (AMENDMENT NO. ) SANDRIDGE MISSISSIPPIAN TRUST I (Name of Issuer) COMMON UNITS (Title of Class of Securities) (CUSIP Number

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G UNDER THE SECURITIES EXCHANGE ACT OF 1934 (AMENDMENT NO. ) SANDRIDGE MISSISSIPPIAN TRUST I (Name of Issuer) COMMON UNITS (Title of Class of Securities) 80007T101 (CUSIP Number) Check the following box if a fee is being paid with this statement o. (A fee is not required only if the filing person: (1) has a previous

May 20, 2011 10-Q

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

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q (Mark One) x QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2011 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: 0

April 19, 2011 EX-99.A

AGREEMENT REGARDING JOINT FILING OF STATEMENT ON SCHEDULE 13D OR 13G

CUSIP NO.: 80007T 101 EXHIBIT A AGREEMENT REGARDING JOINT FILING OF STATEMENT ON SCHEDULE 13D OR 13G The undersigned agree to file jointly with the Securities and Exchange Commission (the ?SEC?) any and all statements on Schedule 13D or Schedule 13G (and any amendments or supplements thereto) required under section 13(d) of the Securities Exchange Act of 1934, as amended, in connection with purcha

April 19, 2011 SC 13D

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D Under the Securities Exchange Act of 1934 SandRidge Mississippian Trust I (Name of Issuer) Common Units of Beneficial Interest (Title of Class of Securities) 80007T

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D Under the Securities Exchange Act of 1934 SandRidge Mississippian Trust I (Name of Issuer) Common Units of Beneficial Interest (Title of Class of Securities) 80007T 101 (CUSIP Number) Philip T. Warman Senior Vice President and General Counsel SandRidge Energy, Inc. and SandRidge Exploration and Production, LLC 123

April 18, 2011 EX-10.10

Registration Rights Agreement, dated as of April 12, 2011, by and between SandRidge Energy, Inc. and SandRidge Mississippian Trust I

Exhibit 10.10 REGISTRATION RIGHTS AGREEMENT BY AND BETWEEN SANDRIDGE MISSISSIPPIAN TRUST I AND SANDRIDGE ENERGY, INC., DATED AS OF APRIL 12, 2011 This Registration Rights Agreement (the ?Agreement?) is made and entered into as of April 12, 2011, by and between SandRidge Mississippian Trust I, a statutory trust formed under the laws of the State of Delaware (the ?Trust?), and SandRidge Energy, Inc.

April 18, 2011 EX-10.6

Administrative Services Agreement, by and between SandRidge Energy, Inc. and SandRidge Mississippian Trust I

Exhibit 10.6 ADMINISTRATIVE SERVICES AGREEMENT This Administrative Services Agreement (this ?Agreement?) by and between SandRidge Energy, Inc., a Delaware corporation, with offices at 123 Robert S. Kerr Avenue, Oklahoma City, OK 73102-6406 (the ?Company?), and SandRidge Mississippian Trust I, a statutory trust formed under the laws of the State of Delaware (the ?Trust?) is delivered to be effectiv

April 18, 2011 EX-10.5

Term Overriding Royalty Interest Conveyance (PUD), by and between SandRidge Exploration and Production, LLC and Mistmada Oil Company

Exhibit 10.5 TERM OVERRIDING ROYALTY INTEREST CONVEYANCE (PUD) This TERM OVERRIDING ROYALTY INTEREST CONVEYANCE (this ?Conveyance?) from SandRidge Exploration and Production, LLC, a Delaware limited liability company, with offices at 123 Robert S. Kerr Avenue, Oklahoma City, OK 73102-6406 (?Assignor?) to Mistmada Oil Company, Inc., an Oklahoma corporation, with offices at 123 Robert S. Kerr Avenue

April 18, 2011 EX-10.4

Term Overriding Royalty Interest Conveyance (PDP), by and between SandRidge Exploration and Production, LLC and Mistmada Oil Company

Exhibit 10.4 TERM OVERRIDING ROYALTY INTEREST CONVEYANCE (PDP) This TERM OVERRIDING ROYALTY INTEREST CONVEYANCE (this ?Conveyance?) from SandRidge Exploration and Production, LLC, a Delaware limited liability company, with offices at 123 Robert S. Kerr Avenue, Oklahoma City, OK 73102-6406 (?Assignor?) to Mistmada Oil Company, Inc., an Oklahoma corporation, with offices at 123 Robert S. Kerr Avenue

April 18, 2011 EX-10.9

DERIVATIVES AGREEMENT

Exhibit 10.9 DERIVATIVES AGREEMENT This DERIVATIVES AGREEMENT, delivered as of April 12, 2011, is between SandRidge Energy, Inc., a Delaware corporation (?SandRidge?), and SandRidge Mississippian Trust I, a Delaware statutory trust (the ?Trust?) and is delivered to be effective as of 12:01 a.m., Central Time, April 1, 2011. R E C I T A L S WHEREAS, the Trust is governed by that certain Amended and

April 18, 2011 EX-10.8

MORTGAGE SANDRIDGE EXPLORATION AND PRODUCTION, LLC, as MORTGAGOR SANDRIDGE MISSISSIPPIAN TRUST I, as MORTGAGEE Dated as of April 12, 2011

EX-10.8 10 dex108.htm MORTGAGE Exhibit 10.8 WHEN RECORDED PLEASE RETURN TO: SandRidge Energy, Inc. Attn: Phillip T. Warman 123 Robert S. Kerr Avenue Oklahoma City, OK 73102-6406 Space above for County Recorder’s Use A POWER OF SALE HAS BEEN GRANTED IN THIS MORTGAGE. A POWER OF SALE MAY ALLOW THE MORTGAGEE TO TAKE THE MORTGAGED PROPERTY AND SELL IT WITHOUT GOING TO A COURT IN A FORECLOSURE ACTION U

April 18, 2011 EX-10.7

DEVELOPMENT AGREEMENT

Exhibit 10.7 DEVELOPMENT AGREEMENT This Development Agreement (the ?Development Agreement?) by and among SandRidge Energy, Inc., a Delaware corporation, with offices at 123 Robert S. Kerr Avenue, Oklahoma City, OK 73102-6406 (?SandRidge Parent?), SandRidge Exploration and Production, LLC, a Delaware limited liability company and wholly owned subsidiary of SandRidge Parent with offices at 123 Rober

April 18, 2011 EX-10.3

Assignment of Overriding Royalty Interest, by and between Mistmada Oil Company and SandRidge Mississippian Trust I

EX-10.3 5 dex103.htm ASSIGNMENT OF OVERRIDING ROYALTY INTEREST Exhibit 10.3 WHEN RECORDED PLEASE RETURN TO: Mistmada Oil Company, Inc. Attn: Philip T. Warman 123 Robert S. Kerr Avenue Oklahoma City, OK 73102-6406 ASSIGNMENT OF OVERRIDING ROYALTY INTEREST KNOW ALL MEN BY THESE PRESENTS THAT: This ASSIGNMENT OF OVERRIDING ROYALTY INTEREST (this “Assignment”) from Mistmada Oil Company, Inc., an Oklah

April 18, 2011 EX-10.2

Perpetual Overriding Royalty Interest Conveyance (PUD), by and between SandRidge Exploration and Production, LLC and SandRidge Mississippian Trust I

EX-10.2 4 dex102.htm PERPETUAL OVERRIDING ROYALTY INTEREST CONVEYANCE Exhibit 10.2 PERPETUAL OVERRIDING ROYALTY INTEREST CONVEYANCE (PUD) This PERPETUAL OVERRIDING ROYALTY INTEREST CONVEYANCE (this “Conveyance”) from SandRidge Exploration and Production, LLC, a Delaware limited liability company, with offices at 123 Robert S. Kerr Avenue, Oklahoma City, OK 73102-6406 (“Assignor”), to SandRidge Mis

April 18, 2011 EX-3.1

Amended and Restated Trust Agreement of SandRidge Mississippian Trust I, dated April 12, 2011, by and among SandRidge Energy, Inc., The Bank of New York Mellon Trust Company, N.A., and The Corporation Trust Company

Exhibit 3.1 AMENDED AND RESTATED TRUST AGREEMENT OF SANDRIDGE MISSISSIPPIAN TRUST I Among SANDRIDGE ENERGY, INC. and THE BANK OF NEW YORK MELLON TRUST COMPANY, N.A. and CORPORATION TRUST COMPANY Dated: As of April 12, 2011 TABLE OF CONTENTS Page ARTICLE I DEFINITIONS 2 ARTICLE II NAME AND PURPOSE OF THE TRUST; DECLARATION OF TRUST 9 Section 2.01. Name; Certificate of Trust 9 Section 2.02. Purpose

April 18, 2011 EX-10.1

Perpetual Overriding Royalty Interest Conveyance (PDP), by and between SandRidge Exploration and Production, LLC and SandRidge Mississippian Trust I

EX-10.1 3 dex101.htm PERPETUAL OVERRIDING ROYALTY INTEREST CONVEYANCE Exhibit 10.1 PERPETUAL OVERRIDING ROYALTY INTEREST CONVEYANCE (PDP) This PERPETUAL OVERRIDING ROYALTY INTEREST CONVEYANCE (this “Conveyance”) from SandRidge Exploration and Production, LLC, a Delaware limited liability company, with offices at 123 Robert S. Kerr Avenue, Oklahoma City, OK 73102-6406 (“Assignor”), to SandRidge Mis

April 18, 2011 8-K

Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year, Entry into a Material Definitive Agreement, Unregistered Sales of Equity Securities, 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): April 12, 2011 SANDRIDGE MISSISSIPPIAN TRUST I (Exact name of registrant as specified in its charter) Delaware 1-35122 27-6990649 (State or Other Jurisdiction of Incorporation or Orga

April 8, 2011 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): April 6, 2011 SANDRIDGE MISSISSIPPIAN TRUST I (Exact name of registrant as specified in its charter) Delaware 1-35122 27-6990649 (State or Other Jurisdiction of Incorporation or Organ

April 8, 2011 EX-1.1

15,000,000 Common Units SANDRIDGE MISSISSIPPIAN TRUST I UNDERWRITING AGREEMENT

Exhibit 1.1 EXECUTION COPY 15,000,000 Common Units SANDRIDGE MISSISSIPPIAN TRUST I UNDERWRITING AGREEMENT St. Petersburg, Florida April 6, 2011 Raymond James & Associates, Inc. Morgan Stanley & Co. Incorporated As Representatives of the Several Underwriters listed on Schedule I hereto c/o Raymond James & Associates, Inc. 880 Carillon Parkway St. Petersburg, Florida 33716 c/o Morgan Stanley & Co. I

April 7, 2011 FWP

SandRidge Mississippian Trust I April 6, 2011

Filed pursuant to Rule 433 Issuer Free Writing Prospectus dated April 6, 2011 Relating to Preliminary Prospectus dated March 28, 2011 Registration Statement No.

April 7, 2011 424B4

SandRidge Mississippian Trust I 15,000,000 Common Units

Table of Contents Index to Financial Statements Filed Pursuant to Rule 424(b)(4) Registration Nos.

April 6, 2011 S-1MEF

As filed with the Securities and Exchange Commission on April 6, 2011

As filed with the Securities and Exchange Commission on April 6, 2011 Registration No.

April 4, 2011 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 (g) OF THE SECURITIES EXCHANGE ACT OF 1934 SandRidge Mississippian Trust I (Exact name of

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 (g) OF THE SECURITIES EXCHANGE ACT OF 1934 SandRidge Mississippian Trust I (Exact name of registrant as specified in its charter) Delaware 20-8084793 (State of incorporation or organization) (I.R.S. Employer Identification Number) 919 Congr

April 1, 2011 CORRESP

RAYMOND JAMES & ASSOCIATES, INC. Member New York Stock Exchange/SIPC The Raymond James Financial Center 880 Carillon Parkway P.O. Box 12749 St. Petersburg, FL 33733-2749 (727) 573-3800 www.raymondjames.com

April 1, 2011 Division of Corporation Finance Securities and Exchange Commission 100 F Street, N.

April 1, 2011 CORRESP

[Letterhead of SandRidge Energy, Inc.] April 1, 2011

[Letterhead of SandRidge Energy, Inc.] April 1, 2011 Division of Corporation Finance Securities and Exchange Commission 100 F Street, N.E. Washington, D.C. 20549 Attention: Pamela Long VIA FACSIMILE and EDGAR Re: SandRidge Mississippian Trust I Registration Statement on Form S-1 File No. 333-171551 SandRidge Energy, Inc. Registration Statement on Form S-3 File No. 333-171551-01 Ladies and Gentleme

March 31, 2011 S-1/A

As filed with the Securities and Exchange Commission on March 31, 2011

As filed with the Securities and Exchange Commission on March 31, 2011 Registration No.

March 29, 2011 424A

Subject to Completion, dated March 28, 2011

Table of Contents Index to Financial Statements The information in this preliminary prospectus is not complete and may be changed.

March 23, 2011 CORRESP

[Letterhead of SandRidge Energy, Inc.]

[Letterhead of SandRidge Energy, Inc.] Via EDGAR and Hand Delivery March 23, 2011 Pamela Long Assistant Director Division of Corporation Finance United States Securities and Exchange Commission Washington, D.C. 20549 Re: SandRidge Mississippian Trust I Amendment No. 2 to Registration Statement on Form S-1 Filed March 4, 2011 File No. 333-171551 SandRidge Energy, Inc. Amendment No. 2 to Registratio

March 23, 2011 EX-10.10

REGISTRATION RIGHTS AGREEMENT BY AND BETWEEN SANDRIDGE MISSISSIPPIAN TRUST I SANDRIDGE ENERGY, INC., DATED AS OF [ ], 2011

Exhibit 10.10 REGISTRATION RIGHTS AGREEMENT BY AND BETWEEN SANDRIDGE MISSISSIPPIAN TRUST I AND SANDRIDGE ENERGY, INC., DATED AS OF [ ], 2011 This Registration Rights Agreement (the ?Agreement?) is made and entered into as of [ ], 2011, by and between SandRidge Mississippian Trust I, a statutory trust formed under the laws of the State of Delaware (the ?Trust?), and SandRidge Energy, Inc. (?SandRid

March 23, 2011 EX-10.6

ADMINISTRATIVE SERVICES AGREEMENT

Exhibit 10.6 ADMINISTRATIVE SERVICES AGREEMENT This Administrative Services Agreement (this ?Agreement?) by and between SandRidge Energy, Inc., a Delaware corporation, with offices at 123 Robert S. Kerr Avenue, Oklahoma City, OK 73102-6406 (the ?Company?), and SandRidge Mississippian Trust I, a statutory trust formed under the laws of the State of Delaware (the ?Trust?) is delivered to be effectiv

March 23, 2011 EX-10.7

DEVELOPMENT AGREEMENT

Exhibit 10.7 DEVELOPMENT AGREEMENT This Development Agreement (the ?Development Agreement?) by and among SandRidge Energy, Inc., a Delaware corporation, with offices at 123 Robert S. Kerr Avenue, Oklahoma City, OK 73102-6406 (?SandRidge?), SandRidge Exploration and Production, LLC, a Delaware limited liability company and wholly owned subsidiary of SandRidge with offices at 123 Robert S. Kerr Aven

March 23, 2011 EX-10.3

PERPETUAL OVERRIDING ROYALTY INTEREST CONVEYANCE (PDP)

Exhibit 10.3 PERPETUAL OVERRIDING ROYALTY INTEREST CONVEYANCE (PDP) This PERPETUAL OVERRIDING ROYALTY INTEREST CONVEYANCE (this ?Conveyance?) from SandRidge Exploration and Production, LLC, a Delaware limited liability company, with offices at 123 Robert S. Kerr Avenue, Oklahoma City, OK 73102-6406 (?Assignor?), to SandRidge Mississippian Trust I, a statutory trust formed under the laws of the Sta

March 23, 2011 EX-10.9

MORTGAGE SANDRIDGE EXPLORATION AND PRODUCTION, LLC, as MORTGAGOR SANDRIDGE MISSISSIPPIAN TRUST I, as MORTGAGEE Dated as of , 2011

Exhibit 10.9 WHEN RECORDED PLEASE RETURN TO: SandRidge Energy, Inc. Attn: Phillip T. Warman 123 Robert S. Kerr Avenue Oklahoma City, OK 73102-6406 Space above for County Recorder?s Use A POWER OF SALE HAS BEEN GRANTED IN THIS MORTGAGE. A POWER OF SALE MAY ALLOW THE MORTGAGEE TO TAKE THE MORTGAGED PROPERTY AND SELL IT WITHOUT GOING TO A COURT IN A FORECLOSURE ACTION UPON DEFAULT BY MORTGAGOR UNDER

March 23, 2011 EX-10.5

ASSIGNMENT OF OVERRIDING ROYALTY INTEREST

Exhibit 10.5 WHEN RECORDED PLEASE RETURN TO: Mistmada Oil Company, Inc. Attn: Philip T. Warman 123 Robert S. Kerr Avenue Oklahoma City, OK 73102-6406 ASSIGNMENT OF OVERRIDING ROYALTY INTEREST KNOW ALL MEN BY THESE PRESENTS THAT: This ASSIGNMENT OF OVERRIDING ROYALTY INTEREST (this ?Assignment?) from Mistmada Oil Company, Inc., an Oklahoma corporation, with offices at 123 Robert S. Kerr Avenue, Okl

March 23, 2011 EX-1.1

12,500,000 Common Units SANDRIDGE MISSISSIPPIAN TRUST I UNDERWRITING AGREEMENT

Exhibit 1.1 12,500,000 Common Units SANDRIDGE MISSISSIPPIAN TRUST I UNDERWRITING AGREEMENT St. Petersburg, Florida , 2011 Raymond James & Associates, Inc. Morgan Stanley & Co. Incorporated As Representatives of the Several Underwriters listed on Schedule I hereto c/o Raymond James & Associates, Inc. 880 Carillon Parkway St. Petersburg, Florida 33716 c/o Morgan Stanley & Co. Incorporated 1585 Broad

March 23, 2011 EX-4.2

AMENDED AND RESTATED TRUST AGREEMENT SANDRIDGE MISSISSIPPIAN TRUST I SANDRIDGE ENERGY, INC. THE BANK OF NEW YORK MELLON TRUST COMPANY, N.A. CORPORATION TRUST COMPANY Dated: As of [ ], 2011 TABLE OF CONTENTS Page ARTICLE I DEFINITIONS 2 ARTICLE II NAM

Exhibit 4.2 AMENDED AND RESTATED TRUST AGREEMENT OF SANDRIDGE MISSISSIPPIAN TRUST I Among SANDRIDGE ENERGY, INC. and THE BANK OF NEW YORK MELLON TRUST COMPANY, N.A. and CORPORATION TRUST COMPANY Dated: As of [ ], 2011 TABLE OF CONTENTS Page ARTICLE I DEFINITIONS 2 ARTICLE II NAME AND PURPOSE OF THE TRUST; DECLARATION OF TRUST 9 Section 2.01. Name; Certificate of Trust 9 Section 2.02. Purpose 9 Sec

March 23, 2011 EX-10.2

TERM OVERRIDING ROYALTY INTEREST CONVEYANCE (PUD)

Exhibit 10.2 TERM OVERRIDING ROYALTY INTEREST CONVEYANCE (PUD) This TERM OVERRIDING ROYALTY INTEREST CONVEYANCE (this ?Conveyance?) from SandRidge Exploration and Production, LLC, a Delaware limited liability company, with offices at 123 Robert S. Kerr Avenue, Oklahoma City, OK 73102-6406 (?Assignor?) to Mistmada Oil Company, Inc., an Oklahoma corporation, with offices at 123 Robert S. Kerr Avenue

March 23, 2011 EX-10.1

TERM OVERRIDING ROYALTY INTEREST CONVEYANCE (PDP)

Exhibit 10.1 TERM OVERRIDING ROYALTY INTEREST CONVEYANCE (PDP) This TERM OVERRIDING ROYALTY INTEREST CONVEYANCE (this ?Conveyance?) from SandRidge Exploration and Production, LLC, a Delaware limited liability company, with offices at 123 Robert S. Kerr Avenue, Oklahoma City, OK 73102-6406 (?Assignor?) to Mistmada Oil Company, Inc., an Oklahoma corporation, with offices at 123 Robert S. Kerr Avenue

March 23, 2011 EX-10.4

PERPETUAL OVERRIDING ROYALTY INTEREST CONVEYANCE (PUD)

Exhibit 10.4 PERPETUAL OVERRIDING ROYALTY INTEREST CONVEYANCE (PUD) This PERPETUAL OVERRIDING ROYALTY INTEREST CONVEYANCE (this ?Conveyance?) from SandRidge Exploration and Production, LLC, a Delaware limited liability company, with offices at 123 Robert S. Kerr Avenue, Oklahoma City, OK 73102-6406 (?Assignor?), to SandRidge Mississippian Trust I, a statutory trust formed under the laws of the Sta

March 23, 2011 S-1/A

As filed with the Securities and Exchange Commission on March 23, 2011

Table of Contents Index to Financial Statements As filed with the Securities and Exchange Commission on March 23, 2011 Registration No.

March 23, 2011 EX-10.8

DERIVATIVES AGREEMENT dated as of [ ], 2011 SANDRIDGE ENERGY, INC., SANDRIDGE MISSISSIPPIAN TRUST I

Exhibit 10.8 DERIVATIVES AGREEMENT dated as of [ ], 2011 between SANDRIDGE ENERGY, INC., and SANDRIDGE MISSISSIPPIAN TRUST I This DERIVATIVES AGREEMENT, dated as of [ ], 2011, is between SandRidge Energy, Inc., a Delaware corporation (?SandRidge?), and SandRidge Missippian Trust I, a Delaware statutory trust (the ?Trust?). R E C I T A L S WHEREAS, the Trust is governed by that certain Amended and

March 4, 2011 CORRESP

[Letterhead of SandRidge Energy, Inc.]

[Letterhead of SandRidge Energy, Inc.] Via EDGAR and Hand Delivery March 4, 2011 Pamela Long Assistant Director Division of Corporation Finance United States Securities and Exchange Commission Washington, D.C. 20549 Re: SandRidge Mississippian Trust I Amendment No. 1 to Registration Statement on Form S-1 Filed February 9, 2011 File No. 333-171551 SandRidge Energy, Inc. Amendment No. 1 to Registrat

March 4, 2011 S-1/A

As filed with the Securities and Exchange Commission on March 4, 2011

Table of Contents Index to Financial Statements As filed with the Securities and Exchange Commission on March 4, 2011 Registration No.

February 9, 2011 S-1/A

As filed with the Securities and Exchange Commission on February 9, 2011

Table of Contents Index to Financial Statements As filed with the Securities and Exchange Commission on February 9, 2011 Registration No.

February 9, 2011 CORRESP

[Letterhead of SandRidge Energy, Inc.]

[Letterhead of SandRidge Energy, Inc.] Via EDGAR and Hand Delivery February 9, 2011 Pamela Long Assistant Director Division of Corporation Finance United States Securities and Exchange Commission Washington, D.C. 20549 Re: SandRidge Mississippian Trust I Registration Statement on Form S-1 Filed January 5, 2011 File No. 333-171551 SandRidge Energy, Inc. Registration Statement on Form S-3 Filed Janu

January 5, 2011 EX-4.1

TRUST AGREEMENT SANDRIDGE MISSISSIPPIAN TRUST I

Exhibit 4.1 Execution Copy TRUST AGREEMENT OF SANDRIDGE MISSISSIPPIAN TRUST I This Trust Agreement of SandRidge Mississippian Trust I is entered into effective as of the 30th day of December, 2010 (this ?Trust Agreement?), by and among SandRidge Energy, Inc., a Delaware corporation with its principal office in Oklahoma City, Oklahoma (together with its successors and assigns, ?SandRidge?), and The

January 5, 2011 EX-3.1

CERTIFICATE OF TRUST SANDRIDGE MISSISSIPPIAN TRUST I

Exhibit 3.1 Execution Version CERTIFICATE OF TRUST OF SANDRIDGE MISSISSIPPIAN TRUST I THIS Certificate of Trust of SandRidge Mississippian Trust I (the ?Trust?) is being duly executed and filed on behalf of the Trust by the undersigned, as trustees, to form a statutory trust under the Delaware Statutory Trust Act (12 Del. C. ? 3801 et seq.) (the ?Act?). 1. Name. The name of the statutory trust for

January 5, 2011 S-1

As filed with the Securities and Exchange Commission on January 5, 2011

Table of Contents Index to Financial Statements As filed with the Securities and Exchange Commission on January 5, 2011 Registration No.

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