CGO / Calamos Global Total Return Fund - Pengajuan SECLaporan Tahunan, Pernyataan Proksi

Calamos Global Total Return Fund

Mga Batayang Estadistika
LEI 549300K2D63KU54WRP95
CIK 1285650
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 Calamos Global Total Return Fund
SEC Filings (Chronological Order)
Halaman ini menyediakan daftar lengkap dan kronologis dari Pengajuan SEC, tidak termasuk pengajuan kepemilikan yang kami sediakan di tempat lain.
May 12, 2025 DEF 14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☒ Defin

April 25, 2025 CORRESP

April 25, 2025

April 25, 2025 Mr. John Kernan Chief Accounting Office Securities and Exchange Commission 100 F Street, NE Washington, DC 20549 Re: Calamos Global Total Return Fund (“CGO”) (File No. 811-2547); Calamos Convertible and High Income Fund (“CHY”) (File No. 811-21319); Calamos Convertible Opportunities and Income Fund (“CHI”) (File No. 811-21080); Calamos Global Dynamic Income Fund (“CHW”) (File No. 81

May 14, 2024 8-K

Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 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 14, 2024 Calamos Global Total Return Fund (Exact Name of Registrant as Specified in Its Charter) Delaware (State or Other Jurisdiction of Incorporation) 811-21547 20-3377281 (Commission File Number) (IRS Employer Identification No.

May 14, 2024 EX-3.2

CALAMOS GLOBAL TOTAL RETURN FUND AMENDMENT NO. 1 TO THE BY-LAWS

Exhibit 3.2 CALAMOS GLOBAL TOTAL RETURN FUND AMENDMENT NO. 1 TO THE BY-LAWS The undersigned, being at least a majority of the Trustees of Calamos Global Total Return Fund (the “Trust”), hereby amend the Trust’s By-Laws, as amended and restated through August 23, 2021 (the “By-Laws”), as follows: 1. The By-Laws are hereby amended by deleting Article 12 thereof in its entirety and replacing it with

May 14, 2024 DEF 14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☒ Defin

May 8, 2023 DEF 14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☒ Defin

October 3, 2022 424B3

Calamos Global Total Return Fund (the "Fund") Supplement dated September 30, 2022 to the Fund's Prospectus dated March 1, 2021, and as supplemented from time to time and to the Fund's Statement of Information ("SAI") dated March 1, 2021, and as suppl

Calamos Global Total Return Fund (the "Fund") Supplement dated September 30, 2022 to the Fund's Prospectus dated March 1, 2021, and as supplemented from time to time and to the Fund's Statement of Information ("SAI") dated March 1, 2021, and as supplemented from time to time I.

June 7, 2022 CORRESP

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ROPES & GRAY LLP 191 NORTH WACKER DRIVE 32nd FLOOR CHICAGO, ILLINOIS 60606-4302 WWW.

June 2, 2022 424B3

Calamos Global Total Return Fund (the "Fund") Supplement dated June 1, 2022 to the Fund's Prospectus dated March 1, 2021, and as supplemented from time to time and to the Fund's Statement of Information ("SAI") dated March 1, 2021, as supplemented fr

424B3 1 tm2217416d10424b3.htm 424B3 Filed pursuant to Rule 424(b)(3) File No. 333-251787 Calamos Global Total Return Fund (the "Fund") Supplement dated June 1, 2022 to the Fund's Prospectus dated March 1, 2021, and as supplemented from time to time and to the Fund's Statement of Information ("SAI") dated March 1, 2021, as supplemented from time to time I. Recent Developments — Mandatory Redeemable

May 11, 2022 DEF 14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

DEF 14A 1 tm2214781d1def14a.htm DEF 14A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant x Filed by a Party other than the Registrant ¨ Check the appropriate box: ¨ Preliminary Proxy Statement ¨ Confidential, for Use of the Commission Only (a

March 25, 2022 NPORT-EX

See accompanying Notes to Schedule of Investments

Calamos Global Total Return Fund SCHEDULE OF INVESTMENTS JANUARY 31, 2022 (UNAUDITED) PRINCIPAL AMOUNT VALUE CORPORATE BONDS (12.

January 19, 2022 424B3

Calamos Global Total Return Fund (the "Fund") Supplement dated January 19, 2022 to the Fund's Statement of Additional Information dated March 1, 2021, and as supplemented June 30, 2021 and August 26, 2021

Filed pursuant to Rule 424(b)(3) File No. 333-251787 Calamos Global Total Return Fund (the "Fund") Supplement dated January 19, 2022 to the Fund's Statement of Additional Information dated March 1, 2021, and as supplemented June 30, 2021 and August 26, 2021 Effective immediately, the tenth paragraph under the section titled "Investment Restrictions" on page S-31 of the Statement of Additional Info

January 3, 2022 424B3

Calamos Global Total Return Fund (the "Fund") Supplement dated January 1, 2022 to the Fund's Prospectus dated March 1, 2021, and as supplemented March 5, 2021, August 26, 2021 and September 30, 2021

Filed pursuant to Rule 424(b)(3) File No. 333-251787 Calamos Global Total Return Fund (the "Fund") Supplement dated January 1, 2022 to the Fund's Prospectus dated March 1, 2021, and as supplemented March 5, 2021, August 26, 2021 and September 30, 2021 The section titled "Effects of Leverage" beginning on page 42 of the Prospectus is deleted in its entirety and replaced with the following: Effects

September 30, 2021 424B3

Calamos Global Total Return Fund (the “Fund”) Supplement dated September 30, 2021 to the Fund’s Prospectus dated March 1, 2021, and as supplemented March 5, 2021 and August 26, 2021

Filed pursuant to Rule 424(b)(3) File No. 333- 251787 Amendment to Prospectus Supplement (To Prospectus dated March 1, 2021) Calamos Global Total Return Fund (the ?Fund?) Supplement dated September 30, 2021 to the Fund?s Prospectus dated March 1, 2021, and as supplemented March 5, 2021 and August 26, 2021 All references in the Prospectus Supplement to the Distribution Agreement shall mean the dist

September 28, 2021 NPORT-EX

See accompanying Notes to Schedule of Investments

Calamos Global Total Return Fund SCHEDULE OF INVESTMENTS JULY 31, 2021 (UNAUDITED) PRINCIPAL AMOUNT VALUE CORPORATE BONDS (12.

September 13, 2021 SC 13G

WOW / WideOpenWest Inc / NORTHWESTERN MUTUAL LIFE INSURANCE CO - CALAMOS GLOBAL TOTAL RETURN FUND Passive Investment

Calamos Global Total Return Fund SECURITIES AND EXCHANGE COMMISSION Washington, D.

August 26, 2021 424B3

Calamos Global Total Fund (the “Fund”) Supplement dated August 26, 2021 to the Fund’s Prospectus dated March 1, 2021, and as supplemented March 5, 2021 and to the Fund’s Statement of Information (“SAI”) dated March 1, 2021

Calamos Global Total Fund (the “Fund”) Supplement dated August 26, 2021 to the Fund’s Prospectus dated March 1, 2021, and as supplemented March 5, 2021 and to the Fund’s Statement of Information (“SAI”) dated March 1, 2021 I.

August 26, 2021 EX-3.1

Amended and Restated Declaration of Trust of Calamos Global Total Return Fund dated August 23, 2021.

Exhibit 3.1 CALAMOS GLOBAL TOTAL RETURN FUND THIRD AMENDED AND RESTATED Agreement and Declaration of Trust This THIRD AMENDED AND RESTATED AGREEMENT AND DECLARATION OF TRUST is made on August 23, 2021, by the Trustees hereunder; WHEREAS, the Trust has been formed under the Delaware Act upon the filing of the Certificate of Trust in the Office of the Secretary of State of the State of Delaware; WHE

August 26, 2021 8-K

Current Report

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported) August 23, 2021 Calamos Global Total Return Fund (Exact Name of Registrant as Specified in Its Charter) Delaware (State or Other Jurisdiction of Incorporation) 811-21547 20-3377281 (Commission File Number) (IRS Employer Identification No.

August 26, 2021 EX-3.2

Amended and Restated Bylaws of Calamos Global Total Return Fund dated August 23, 2021.

Exhibit 3.2 Calamos Global Total Return Fund BY-LAWS (as amended and restated through August 23, 2021) Article 1 Agreement and Declaration of Trust 1.1 General. These By-Laws shall be subject to the Agreement and Declaration of Trust, as from time to time amended, supplemented or restated (the ?Declaration of Trust?) of Calamos Global Total Return Fund (the ?Trust?), a Delaware statutory trust est

May 12, 2021 DEF 14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ? Filed by a Party other than the Registrant ? Check the appropriate box: ? Preliminary Proxy Statement ? Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ? Defin

March 31, 2021 NPORT-EX

See accompanying Notes to Schedule of Investments

Calamos Global Total Return Fund SCHEDULE OF INVESTMENTS JANUARY 31, 2021 (UNAUDITED) PRINCIPAL AMOUNT VALUE CORPORATE BONDS (13.

March 5, 2021 424B5

Calamos Global Total Return Fund Up to 1,985,440 Common Shares

424B5 1 tm2038976d9424b5.htm 424B5 Filed pursuant to Rule 424(b)(5) File No. 333-251787 Prospectus Supplement (To Prospectus dated March 5, 2021) Calamos Global Total Return Fund Up to 1,985,440 Common Shares Calamos Global Total Return Fund (the "Fund," "we," "us," or "our") has entered into a distribution agreement dated March 5, 2021 (the "Distribution Agreement") with Foreside Fund Services, L

February 26, 2021 CORRESP

February 26, 2021

CORRESP 1 filename1.htm February 26, 2021 Via E-mail and Edgar Securities and Exchange Commission Division of Investment Management 100 F Street, N.E. Washington, D.C. 20549-0505 Attention: Ms. Lisa Larkin Re: Calamos Global Total Return Fund (the “Fund”) Pre-Effective Amendment No. 2 to the Fund’s Registration Statement on Form N-2 File Nos. 333-251787 and 811-21547 Ladies and Gentlemen: Pursuant

February 19, 2021 CORRESP

February 19, 2021

CORRESP 1 filename1.htm February 19, 2021 Via E-mail and Edgar Securities and Exchange Commission Division of Investment Management 100 F Street, N.E. Washington, D.C. 20549-0505 Attention: Ms. Lisa Larkin Re: Calamos Global Total Return Fund (the “Fund”) Pre-Effective Amendment No. 1 to the Fund’s Registration Statement on Form N-2 File Nos. 333-251787 and 811-21547 Ladies and Gentlemen: Pursuant

February 8, 2021 CORRESP

STATEMENT OF ADDITIONAL INFORMATION

CORRESP 1 filename1.htm February 8, 2021 Ms. Lisa N. Larkin Securities and Exchange Commission 100 F Street, NE Washington, DC 20549-4720 Re: Calamos Global Total Return (File Nos. 333-251787, 811-21547) (the “Registrant” or the “Fund”) Dear Ms. Larkin: This letter is in response to the comment of the staff (the “Staff”) of the Securities and Exchange Commission (the “Commission”) that you provide

January 12, 2021 EX-3.2

Amended and Restated Bylaws of Calamos Global Total Return Fund dated January 12, 2021.

Exhibit 3.2 CALAMOS GLOBAL TOTAL RETURN FUND BY-LAWS (as amended and restated through January 12, 2021) ARTICLE 1 Agreement and Declaration of Trust 1.1 General. These By-Laws shall be subject to the Agreement and Declaration of Trust, as from time to time amended, supplemented or restated (the “Declaration of Trust”) of Calamos Global Total Return Fund (the “Trust”), a Delaware statutory trust es

January 12, 2021 EX-3.1

Amended and Restated Declaration of Trust of Calamos Global Total Return Fund dated January 12, 2021.

Exhibit 3.1 CALAMOS GLOBAL TOTAL RETURN FUND SECOND AMENDED AND RESTATED AGREEMENT AND DECLARATION OF TRUST This SECOND AMENDED AND RESTATED AGREEMENT AND DECLARATION OF TRUST is made on January 12, 2021, by the Trustees hereunder; WHEREAS, the Trust has been formed under the Delaware Act upon the filing of the Certificate of Trust in the Office of the Secretary of State of the State of Delaware;

January 12, 2021 8-K

- 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 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 12, 2021 Calamos Global Total Return Fund (Exact Name of Registrant as Specified in Its Charter) Delaware (State or Other Jurisdiction of Incorporation) 811-21547 20-3377281 (Commission File Number) (IRS Employer Identification No.

September 29, 2020 NPORT-EX

See accompanying Notes to Schedule of Investments

HTML Calamos Global Total Return Fund SCHEDULE OF INVESTMENTS JULY 31, 2020 (UNAUDITED) PRINCIPAL AMOUNT VALUE CORPORATE BONDS (20.

May 14, 2020 DEF 14A

- DEF 14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ☑ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☑ Defin

March 31, 2020 NPORT-EX

Materials (2.0%)

Calamos Global Total Return Fund SCHEDULE OF INVESTMENTS JANUARY 31, 2020 (UNAUDITED) PRINCIPAL AMOUNT VALUE CORPORATE BONDS (19.

February 21, 2020 486BPOS

As filed with the Securities and Exchange Commission on February 21, 2020

As filed with the Securities and Exchange Commission on February 21, 2020 1933 Act File No.

February 21, 2020 EX-99.N

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

Exhibit n CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM We consent to the use in this Post-Effective Amendment No.

February 21, 2020 EX-99.S.4

Power of Attorney for Karen L. Stuckey and Christopher M. Toub

Exhibit s.4 POWER OF ATTORNEY The person whose signature appears below hereby appoints John P. Calamos, Sr. and J. Christopher Jackson and each of them, any of whom may act without the joinder of the others, as such person’s attorney-in-fact to sign and file on such person’s behalf individually and in the capacity stated below such registration statements, amendments, post-effective amendments, ex

February 21, 2020 EX-99.H.10

First Amendment to Distribution Agreement relating to Common Shares dated January 13, 2020, between Registrant and Foreside Fund Services, LLC

Exhibit h.10 First Amendment to Distribution Agreement THIS FIRST AMENDMENT made as of January 13, 2020 to that certain Distribution Agreement by and between Calamos Global Total Return Fund, a Delaware statutory trust (the “Fund”), and Foreside Fund Services, LLC, a Delaware limited liability company (the “Distributor”) dated as of March 8, 2019 (the “Distribution Agreement”). WHEREAS, the Fund h

February 21, 2020 EX-99.H.12

First Amendment to Sub-Placement Agent Agreement dated January 13, 2020, between Foreside Fund Services, LLC and UBS Securities LLC

First Amendment to Sub-Placement Agent Agreement This FIRST AMENDMENT (this “First Amendment”) is made as of January 13, 2020 to that certain Sub-Placement Agent Agreement by and between UBS Securities LLC (the “Agent”), and Foreside Fund Services, LLC, a Delaware limited liability company (the “Distributor”), dated as of March 8, 2019 (the “Sub-Placement Agent Agreement”).

February 21, 2020 EX-99.R.1

Code of Ethics

Exhibit r.1 Table of Contents Page UNDERSTANDING AND APPLYING THE CODE 3 1. Understanding the Terms 3 2. Purpose of the Code of Ethics and Insider Trading Policy 7 3. Scope 8 4. Reporting Violations of the Code 8 CONSEQUENCES OF FAILURE TO COMPLY WITH THE CODE 9 RESTRICTIONS ON THE USE AND DISCLOSURE OF CONFIDENTIAL INFORMATION BY CALAMOS PERSONNEL 9 1. Insider Trading and Tipping 9 2. General Pro

September 27, 2019 NPORT-EX

CGO / Calamos Global Total Return Fund NPORT-EX - - CALAMOS GLOBAL TOTAL RETURN FUND

CALAMOS GLOBAL TOTAL RETURN FUND Calamos Global Total Return Fund SCHEDULE OF INVESTMENTS JULY 31, 2019 (UNAUDITED) PRINCIPAL AMOUNT VALUE CORPORATE BONDS (21.

May 24, 2019 DEF 14A

CGO / Calamos Global Total Return Fund DEF 14A - - DEF 14A

DEF 14A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ☑ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2))

March 13, 2019 POS EX

CGO / Calamos Global Total Return Fund CALAMOS GLOBAL TOTAL RETURN FUND

Calamos Global Total Return Fund As filed with the Securities and Exchange Commission on March 13, 2019 1933 Act File No.

March 13, 2019 EX-99.H.10

Sub-Placement Agent Agreement relating to Common Shares dated February [ ], 2021, between Foreside Fund Services, LLC and UBS Securities LLC

Sub-Placement Agent Agreement Exhibit h.10 SUB-PLACEMENT AGENT AGREEMENT Foreside Fund Services, LLC Three Canal Plaza, Suite 100 Portland, Maine 04101 March 8, 2019 UBS Securities LLC 1285 Avenue of the Americas New York, New York 10019 RE: At-the-Market Offerings by Calamos Global Total Return Fund Ladies and Gentlemen: From time to time Foreside Fund Services, LLC (the “Distributor”, “we” or “u

March 13, 2019 EX-99.H.9

Distribution Agreement relating to Common Shares dated February [ ], 2021, between Registrant and Foreside Fund Services, LLC

Distribution Agreement Exhibit h.9 DISTRIBUTION AGREEMENT This DISTRIBUTION AGREEMENT (this “Agreement”) made as of March 8, 2019 by and between Calamos Global Total Return Fund, a Delaware statutory trust (the “Fund”), and Foreside Fund Services, LLC, a Delaware limited liability company (the “Distributor”). WITNESSETH: WHEREAS, the Fund is registered under the Investment Company Act of 1940, as

March 7, 2019 EX-99.CERT

Certification of Principal Executive Officer.

EX-99.CERT 2 cgo-ex99cert.htm CERTIFICATIONS Calamos Global Total Return Fund N-Q EX-99.CERT CERTIFICATION OF PRINCIPAL EXECUTIVE OFFICER I, John P. Calamos, Sr., certify that: 1. I have reviewed this report on Form N-Q of Calamos Global Total Return Fund; 2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to ma

March 7, 2019 N-Q

Calamos Global Total Return Fund N-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM N-Q QUARTERLY SCHEDULE OF PORTFOLIO HOLDINGS OF REGISTERED MANAGEMENT INVESTMENT COMPANIES INVESTMENT COMPANY ACT FILE NUMBER: 811-21547 EXACT NAME OF REGISTRANT AS SPECIFIED IN CHARTER: Calamos Global Total Return Fund ADDRESS OF PRINCIPAL EXECUTIVE OFFICES: 2020 Calamos Court, Naperville, Illinois 60563-2787 NAME AND AD

March 1, 2019 EX-99.N

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

Consent of Auditors Exhibit n. CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM We consent to the use in this Post-Effective Amendment No. 3 to Registration Statement No. 333-224205 on Form N-2 of our report dated December 17, 2018, relating to the financial statements and financial highlights of Calamos Global Total Return Fund appearing in the Statement of Additional Information, which i

March 1, 2019 486BPOS

CGO / Calamos Global Total Return Fund CALAMOS GLOBAL TOTAL RETURN FUND

CALAMOS GLOBAL TOTAL RETURN FUND Table of Contents As filed with the Securities and Exchange Commission on February 28, 2019 1933 Act File No.

February 22, 2019 EX-99.K.4

Administration Agreement

Administration Agreement Exhibit k.4 ADMINISTRATION AGREEMENT THIS ADMINISTRATION AGREEMENT (this “Agreement”) is entered into as of October 26, 2018 by and between State Street Bank and Trust Company, a Massachusetts trust company (the “Administrator”), and each registered management investment company identified on Schedule A hereto (each, a “Trust” and, together with the Administrator, the “Par

February 22, 2019 EX-99.S.3

Power of Attorney for Lloyd A. Wennlund.

Power of Attorney (for Lloyd A. Wennlund) Exhibit s.3 POWER OF ATTORNEY The person whose signature appears below hereby appoints John P. Calamos, Sr. and J. Christopher Jackson and each of them, any of whom may act without the joinder of the others, as such person’s attorney-in-fact to sign and file on such person’s behalf individually and in the capacity stated below such registration statements,

February 22, 2019 486BPOS

CGO / Calamos Global Total Return Fund CALAMOS GLOBAL TOTAL RETURN FUND

CALAMOS GLOBAL TOTAL RETURN FUND Table of Contents As filed with the Securities and Exchange Commission on February 22, 2019 1933 Act File No.

February 22, 2019 EX-99.L.4

February 22, 2019

Opinion of Richards, Layton & Finger, P.A. regarding Common Shares Exhibit l.4 February 22, 2019 Calamos Global Total Return Fund 2020 Calamos Court Naperville, Illinois 60563 Re: Calamos Global Total Return Fund Ladies and Gentlemen: We have acted as special Delaware counsel for Calamos Global Total Return Fund, a Delaware statutory trust (the “Trust”), in connection with the matters set forth he

February 22, 2019 EX-99.K.5

Services Agreement

Services Agreement Exhibit k.5 Ernst & Young LLP 155 N Wacker Drive Chicago, IL 60606 Tel: +1 312 879 20 00 Fax: +1 312 879 4000 ey.com Building a better working world Curtis Holloway Principal Financial Officer Calamos Investment Trust, Calamos Closed-End Funds and Calamos Advisors Trust 2020 Calamos Court Naperville, IL 60563 October 15, 2018 Dear Mr. Holloway: Thank you for choosing Ernst & You

February 22, 2019 EX-99.N

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

EX-99.N 5 d711225dex99n.htm CONSENT OF AUDITORS Exhibit n. CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM We consent to the use in this Post-Effective Amendment No. 2 to Registration Statement No. 333-224205 on Form N-2 of our report dated December 17, 2018, relating to the financial statements and financial highlights of Calamos Global Total Return Fund appearing in the Statement of Add

September 7, 2018 N-Q

Calamos Global Total Return Fund N-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM N-Q QUARTERLY SCHEDULE OF PORTFOLIO HOLDINGS OF REGISTERED MANAGEMENT INVESTMENT COMPANIES INVESTMENT COMPANY ACT FILE NUMBER: 811-21547 EXACT NAME OF REGISTRANT AS SPECIFIED IN CHARTER: Calamos Global Total Return Fund ADDRESS OF PRINCIPAL EXECUTIVE OFFICES: 2020 Calamos Court, Naperville, Illinois 60563-2787 NAME AND AD

September 7, 2018 EX-99.CERT

Certification of Principal Executive Officer.

Calamos Global Total Return Fund N-Q EX-99.CERT CERTIFICATION OF PRINCIPAL EXECUTIVE OFFICER I, John P. Calamos, Sr., certify that: 1. I have reviewed this report on Form N-Q of Calamos Global Total Return Fund; 2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circu

July 3, 2018 POS EX

Calamos Global Total Return Fund POS EX

As filed with the Securities and Exchange Commission on July 3, 2018 1933 Act File No.

July 3, 2018 EX-99.(H)(8)

Sales Agreement relating to Common Shares dated June 29, 2018, among Registrant, Calamos Advisors LLC and JonesTrading Institutional Services LLC.

Calamos Global Total Return Fund POS EX Exhibit h.8 calamos GLOBAL TOTAL RETURN fund UP tO 2,685,638 COMMON SHARES of Beneficial interest Capital On Demand™ SALES AGREEMENT June 29, 2018 JONESTRADING INSTITUTIONAL SERVICES LLC 757 Third Avenue, 23rd Floor New York, NY 10017 Ladies and Gentlemen: CALAMOS GLOBAL TOTAL RETURN FUND, a Delaware statutory trust (the “Fund”), CALAMOS ADVISORS LLC, a Dela

June 25, 2018 CORRESP

CGO / Calamos Global Total Return Fund CORRESP

calamos GLOBAL TOTAL RETURN FUND 2020 Calamos Court Naperville, Illinois 60563 June 25, 2018 Securities and Exchange Commission 100 F Street NE Washington, DC 20549-4720 Attention: Ms.

June 19, 2018 CORRESP

CGO / Calamos Global Total Return Fund CORRESP

ROPES & GRAY LLP 191 NORTH WACKER DRIVE 32nd FLOOR CHICAGO, ILLINOIS 60606-4302 WWW.

June 14, 2018 CORRESP

CGO / Calamos Global Total Return Fund CORRESP

ROPES & GRAY LLP 191 NORTH WACKER DRIVE 32nd FLOOR CHICAGO, ILLINOIS 60606-4302 WWW.

May 11, 2018 DEF 14A

CGO / Calamos Global Total Return Fund DEF 14A

DEF 14A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ☑ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2))

March 8, 2018 EX-99.CERT

(a) Certification of Principal Executive Officer.

Calamos Global Total Return Fund N-Q EX-99.CERT CERTIFICATION OF PRINCIPAL EXECUTIVE OFFICER I, John P. Calamos, Sr., certify that: 1. I have reviewed this report on Form N-Q of Calamos Global Total Return Fund; 2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circu

March 8, 2018 N-Q

Calamos Global Total Return Fund N-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM N-Q QUARTERLY SCHEDULE OF PORTFOLIO HOLDINGS OF REGISTERED MANAGEMENT INVESTMENT COMPANIES INVESTMENT COMPANY ACT FILE NUMBER: 811-21547 EXACT NAME OF REGISTRANT AS SPECIFIED IN CHARTER: Calamos Global Total Return Fund ADDRESS OF PRINCIPAL EXECUTIVE OFFICES: 2020 Calamos Court, Naperville, Illinois 60563-2787 NAME AND AD

September 1, 2017 N-Q

Calamos Global Total Return Fund - N-Q

N-Q UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM N-Q QUARTERLY SCHEDULE OF PORTFOLIO HOLDINGS OF REGISTERED MANAGEMENT INVESTMENT COMPANIES INVESTMENT COMPANY ACT FILE NUMBER: 811-21547 EXACT NAME OF REGISTRANT AS SPECIFIED IN CHARTER: Calamos Global Total Return Fund ADDRESS OF PRINCIPAL EXECUTIVE OFFICES: 2020 Calamos Court, Naperville Illinois 60563-2787 NAME AND

September 1, 2017 EX-99.CERT

Certification of Principal Executive Officer.

EX-99.CERT Calamos Global Total Return Fund - N-Q EX-99.CERT CERTIFICATION OF PRINCIPAL EXECUTIVE OFFICER I, John P. Calamos, Sr., certify that: 1. I have reviewed this report on Form N-Q of Calamos Global Total Return Fund; 2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light

May 4, 2017 DEF 14A

Calamos Global Total Return Fund DEF 14A

DEF 14A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ? Filed by a Party other than the Registrant ? Check the appropriate box: ? Preliminary Proxy Statement ? Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2))

March 3, 2017 EX-99.CERT

Certification of Principal Executive Officer.

Calamos Global Total Return Fund - N-Q EX-99.CERT CERTIFICATION OF PRINCIPAL EXECUTIVE OFFICER I, John P. Calamos, Sr., certify that: 1. I have reviewed this report on Form N-Q of Calamos Global Total Return Fund; 2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the cir

March 3, 2017 N-Q

Calamos Global Total Return Fund - N-Q

N-Q UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM N-Q QUARTERLY SCHEDULE OF PORTFOLIO HOLDINGS OF REGISTERED MANAGEMENT INVESTMENT COMPANIES INVESTMENT COMPANY ACT FILE NUMBER: 811-21547 EXACT NAME OF REGISTRANT AS SPECIFIED IN CHARTER: Calamos Global Total Return Fund ADDRESS OF PRINCIPAL EXECUTIVE OFFICES: 2020 Calamos Court, Naperville Illinois 60563-2787 NAME AND

October 27, 2016 CORRESP

Calamos Advisors LLC

CORRESP Calamos Advisors LLC J. Christopher Jackson Calamos Advisors LLC 2020 Calamos Court Naperville, IL 60563-2787 (630) 245-8394 October 27, 2016 VIA EDGAR Securities and Exchange Commission Division of Investment Management 100 F Street, N.E. Washington, DC 20549 Attn: Megan Miller Re: Calamos Investment Trust (“Investment Trust”) (File No. 811-05443); Calamos Advisors Trust (“Advisors Trust”

September 15, 2016 EX-99.CERT

CERTIFICATION OF PRINCIPAL EXECUTIVE OFFICER

EX-99.CERT CERTIFICATION OF PRINCIPAL EXECUTIVE OFFICER I, John P. Calamos, Sr., certify that: 1. I have reviewed this report on Form N-Q of Calamos Global Total Return Fund; 2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements

September 15, 2016 N-Q

Calamos Global Total Return Fund N-Q (Quarterly Schedule of Portfolio Holdings)

N-Q UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM N-Q QUARTERLY SCHEDULE OF PORTFOLIO HOLDINGS OF REGISTERED MANAGEMENT INVESTMENT COMPANIES INVESTMENT COMPANY ACT FILE NUMBER: 811-21547 EXACT NAME OF REGISTRANT AS SPECIFIED IN CHARTER: Calamos Global Total Return Fund ADDRESS OF PRINCIPAL EXECUTIVE OFFICES: 2020 Calamos Court, Naperville Illinois 60563-2787 NAME AND

May 10, 2016 DEF 14A

Calamos Global Total Return Fund DEF 14A

DEF 14A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ? Filed by a Party other than the Registrant ? Check the appropriate box: ? Preliminary Proxy Statement ? Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2))

March 22, 2016 N-Q

Calamos Global Total Return Fund N-Q (Quarterly Schedule of Portfolio Holdings)

N-Q UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM N-Q QUARTERLY SCHEDULE OF PORTFOLIO HOLDINGS OF REGISTERED MANAGEMENT INVESTMENT COMPANIES INVESTMENT COMPANY ACT FILE NUMBER: 811-21547 EXACT NAME OF REGISTRANT AS SPECIFIED IN CHARTER: Calamos Global Total Return Fund ADDRESS OF PRINCIPAL EXECUTIVE OFFICES: 2020 Calamos Court, Naperville Illinois 60563-2787 NAME AND

March 22, 2016 EX-99.CERT

CERTIFICATION OF PRINCIPAL EXECUTIVE OFFICER

CERTIFICATION OF PRINCIPAL EXECUTIVE OFFICER I, John P. Calamos, Sr., certify that: 1. I have reviewed this report on Form N-Q of Calamos Global Total Return Fund; 2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made,

September 21, 2015 N-Q

Calamos Global Total Return Fund N-Q (Quarterly Schedule of Portfolio Holdings)

N-Q UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM N-Q QUARTERLY SCHEDULE OF PORTFOLIO HOLDINGS OF REGISTERED MANAGEMENT INVESTMENT COMPANIES INVESTMENT COMPANY ACT FILE NUMBER: 811-21547 EXACT NAME OF REGISTRANT AS SPECIFIED IN CHARTER: Calamos Global Total Return Fund ADDRESS OF PRINCIPAL EXECUTIVE OFFICES: 2020 Calamos Court, Naperville Illinois 60563-2787 NAME AND

September 21, 2015 EX-99.CERT

CERTIFICATION OF PRINCIPAL EXECUTIVE OFFICER

EX-99.CERT CERTIFICATION OF PRINCIPAL EXECUTIVE OFFICER I, John P. Calamos, Sr., certify that: 1. I have reviewed this report on Form N-Q of Calamos Global Total Return Fund; 2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements

June 4, 2015 DEF 14A

Calamos Global Total Return Fund DEF 14A

DEF 14A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ? Filed by a Party other than the Registrant ? Check the appropriate box: ? Preliminary Proxy Statement ? Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2))

March 23, 2015 N-Q

Calamos Global Total Return Fund N-Q (Quarterly Schedule of Portfolio Holdings)

N-Q UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM N-Q QUARTERLY SCHEDULE OF PORTFOLIO HOLDINGS OF REGISTERED MANAGEMENT INVESTMENT COMPANIES INVESTMENT COMPANY ACT FILE NUMBER: 811-21547 EXACT NAME OF REGISTRANT AS SPECIFIED IN CHARTER: Calamos Global Total Return Fund ADDRESS OF PRINCIPAL EXECUTIVE OFFICES: 2020 Calamos Court, Naperville Illinois 60563-2787 NAME AND

March 23, 2015 EX-99.CERT

CERTIFICATION OF PRINCIPAL EXECUTIVE OFFICER

CERTIFICATION OF PRINCIPAL EXECUTIVE OFFICER I, John P. Calamos, Sr., certify that: 1. I have reviewed this report on Form N-Q of Calamos Global Total Return Fund; 2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made,

December 30, 2014 EX-99.77B ACCT LTTR

REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM To the Shareholders and Board of Trustees of Calamos Global Total Return Fund In planning and performing our audit of the financial statements of Calamos Global Total Return Fund (the “Fund”) as of and for the year ended October 31, 2014, in accordance with the standards of the Public Company Accounting Oversight Board (United States), we con

September 18, 2014 N-Q

Calamos Global Total Return Fund - N-Q

N-Q UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM N-Q QUARTERLY SCHEDULE OF PORTFOLIO HOLDINGS OF REGISTERED MANAGEMENT INVESTMENT COMPANIES INVESTMENT COMPANY ACT FILE NUMBER: 811-21547 EXACT NAME OF REGISTRANT AS SPECIFIED IN CHARTER: Calamos Global Total Return Fund ADDRESS OF PRINCIPAL EXECUTIVE OFFICES: 2020 Calamos Court, Naperville Illinois 60563-2787 NAME AND

September 18, 2014 EX-99.CERT

CERTIFICATION OF PRINCIPAL EXECUTIVE OFFICER

CERTIFICATION OF PRINCIPAL EXECUTIVE OFFICER I, John P. Calamos, Sr., certify that: 1. I have reviewed this report on Form N-Q of Calamos Global Total Return Fund; 2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made,

May 23, 2014 DEF 14A

- DEF 14A

DEF 14A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant þ Filed by a Party other than the Registrant ¨ Check the appropriate box: ¨ Preliminary Proxy Statement ¨ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2))

March 24, 2014 N-Q

Quarterly Schedule of Portfolio Holdings - N-Q

N-Q UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM N-Q QUARTERLY SCHEDULE OF PORTFOLIO HOLDINGS OF REGISTERED MANAGEMENT INVESTMENT COMPANIES INVESTMENT COMPANY ACT FILE NUMBER: 811-21547 EXACT NAME OF REGISTRANT AS SPECIFIED IN CHARTER: Calamos Global Total Return Fund ADDRESS OF PRINCIPAL EXECUTIVE OFFICES: 2020 Calamos Court, Naperville Illinois 60563-2787 NAME AND

March 24, 2014 EX-99.CERT

CERTIFICATION OF PRINCIPAL EXECUTIVE OFFICER

EX-99.CERT CERTIFICATION OF PRINCIPAL EXECUTIVE OFFICER I, John P. Calamos, Sr., certify that: 1. I have reviewed this report on Form N-Q of Calamos Global Total Return Fund; 2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements

December 26, 2013 EX-99.77B ACCT LTTR

REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM To the Shareholders and Board of Trustees of Calamos Global Total Return Fund In planning and performing our audit of the financial statements of Calamos Global Total Return Fund (the “Fund”) as of and for the year ended October 31, 2013, in accordance with the standards of the Public Company Accounting Oversight Board (United States), we con

September 18, 2013 EX-99.CERT

CERTIFICATION OF PRINCIPAL EXECUTIVE OFFICER

EX-99.CERT CERTIFICATION OF PRINCIPAL EXECUTIVE OFFICER I, John P. Calamos, Sr., certify that: 1. I have reviewed this report on Form N-Q of Calamos Global Total Return Fund; 2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements

September 18, 2013 N-Q

Quarterly Schedule of Portfolio Holdings - N-Q

N-Q UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM N-Q QUARTERLY SCHEDULE OF PORTFOLIO HOLDINGS OF REGISTERED MANAGEMENT INVESTMENT COMPANIES INVESTMENT COMPANY ACT FILE NUMBER: 811-21547 EXACT NAME OF REGISTRANT AS SPECIFIED IN CHARTER: Calamos Global Total Return Fund ADDRESS OF PRINCIPAL EXECUTIVE OFFICES: 2020 Calamos Court, Naperville Illinois 60563-2787 NAME AND

May 22, 2013 DEF 14A

- DEF 14A

DEF 14A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant þ Filed by a Party other than the Registrant ¨ Check the appropriate box: ¨ Preliminary Proxy Statement ¨ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2))

March 25, 2013 N-Q

Quarterly Schedule of Portfolio Holdings - N-Q

N-Q UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM N-Q QUARTERLY SCHEDULE OF PORTFOLIO HOLDINGS OF REGISTERED MANAGEMENT INVESTMENT COMPANIES INVESTMENT COMPANY ACT FILE NUMBER: 811-21547 EXACT NAME OF REGISTRANT AS SPECIFIED IN CHARTER: Calamos Global Total Return Fund ADDRESS OF PRINCIPAL EXECUTIVE OFFICES: 2020 Calamos Court, Naperville Illinois 60563-2787 NAME AND

March 25, 2013 EX-99.CERT

CERTIFICATION OF PRINCIPAL EXECUTIVE OFFICER

EX-99.CERT CERTIFICATION OF PRINCIPAL EXECUTIVE OFFICER I, John P. Calamos, Sr., certify that: 1. I have reviewed this report on Form N-Q of Calamos Global Total Return Fund; 2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements

February 20, 2013 EX-99.H.7

First Amendment to Sales Agreement dated July 2, 2012

EX-99.H.7 FIRST AMENDMENT TO SALES AGREEMENT This FIRST AMENDMENT TO SALES AGREEMENT (the “Amendment”) is made and entered into with effect this 2nd day of July, 2012, by Calamos Global Total Return Fund, a Delaware statutory trust (the “Fund”), Calamos Advisors LLC, a Delaware limited liability company (the “Adviser”) and JonesTrading Institutional Services LLC (“Jones”). Capitalized terms used b

February 20, 2013 EX-99.S

Powers of Attorney for John E. Neal and William R. Rybak

EX-99.S Exhibit s POWER OF ATTORNEY The person whose signature appears below hereby appoints John P. Calamos, Sr., Nimish S. Bhatt, James J. Boyne and J. Christopher Jackson and each of them, any of whom may act without the joinder of the others, as such person’s attorney-in-fact to sign and file on such person’s behalf individually and in the capacity stated below such registration statements, am

February 20, 2013 EX-99.N

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

EX-99.N CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM We consent to the use in this Post-Effective Amendment No. 3 to Registration Statement No. 333-174431 on Form N-2 of our report dated December 14, 2012, relating to the financial statements and financial highlights of Calamos Global Total Return Fund, appearing in the Statement of Additional Information, and to the references to us u

February 20, 2013 486BPOS

- 486BPOS

486BPOS As filed with the Securities and Exchange Commission on February 20, 2013 1933 Act File No.

February 14, 2013 SC 13G/A

CGO / Calamos Global Total Return Fund / GUGGENHEIM FUNDS DISTRIBUTORS, INC. - CGO Passive Investment

OMB APPROVAL OMB Number: 3235-0145 Expires: December 31, 2005 Estimated average burden hours per response.

September 18, 2012 EX-99.CERT

CERTIFICATION OF PRINCIPAL EXECUTIVE OFFICER

EX-99.CERT CERTIFICATION OF PRINCIPAL EXECUTIVE OFFICER I, John P. Calamos, Sr., certify that: 1. I have reviewed this report on Form N-Q of Calamos Global Total Return Fund; 2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements

September 18, 2012 N-Q

Quarterly Schedule of Portfolio Holdings - N-Q

N-Q UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM N-Q QUARTERLY SCHEDULE OF PORTFOLIO HOLDINGS OF REGISTERED MANAGEMENT INVESTMENT COMPANIES INVESTMENT COMPANY ACT FILE NUMBER: 811-21547 EXACT NAME OF REGISTRANT AS SPECIFIED IN CHARTER: Calamos Global Total Return Fund ADDRESS OF PRINCIPAL EXECUTIVE OFFICES: 2020 Calamos Court, Naperville Illinois 60563-2787 NAME AND

June 28, 2012 8-A12B

description of Common Shares on Form 8-A, filed on June 28, 2012

Form 8-A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-A FOR REGISTRATION OF CERTAIN CLASSES OF SECURITIES PURSUANT TO SECTION 12(b) OR 12(g) OF THE SECURITIES EXCHANGE ACT OF 1934 CALAMOS GLOBAL TOTAL RETURN FUND (Exact Name of Registrant as Specified in Its Charter) Delaware 20-3377281 (State of Incorporation or Organization) (I.R.S. Employer Identification No.)

June 28, 2012 25

- FORM 25

Form 25 OMB APPROVAL OMB Number: 3235-0080 Expires: December 31, 2014 Estimated average burden hours per response.

May 22, 2012 DEF 14A

- DEF 14A

DEF 14A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant þ Filed by a Party other than the Registrant ¨ Check the appropriate box: ¨ Preliminary Proxy Statement ¨ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2))

March 22, 2012 EX-99.CERT

CERTIFICATION OF PRINCIPAL EXECUTIVE OFFICER

CERTIFICATION OF PRINCIPAL EXECUTIVE OFFICER I, John P. Calamos, Sr., certify that: 1. I have reviewed this report on Form N-Q of Calamos Global Total Return Fund; 2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made,

March 22, 2012 N-Q

Quarterly Schedule of Portfolio Holdings - N-Q

N-Q UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM N-Q QUARTERLY SCHEDULE OF PORTFOLIO HOLDINGS OF REGISTERED MANAGEMENT INVESTMENT COMPANIES INVESTMENT COMPANY ACT FILE NUMBER: 811-21547 EXACT NAME OF REGISTRANT AS SPECIFIED IN CHARTER: Calamos Global Total Return Fund ADDRESS OF PRINCIPAL EXECUTIVE OFFICES: 2020 Calamos Court, Naperville Illinois 60563 NAME AND ADDR

February 21, 2012 486BPOS

- 486BPOS

486BPOS As filed with the Securities and Exchange Commission on February 21, 2012 1933 Act File No.

February 21, 2012 EX-99.N

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM We consent to the use in this Post-Effective Amendment No.

February 21, 2012 EX-99.S

POWER OF ATTORNEY

EX-99.S Exhibit s POWER OF ATTORNEY The person whose signature appears below hereby appoints John P. Calamos, Sr., Nimish S. Bhatt, James J. Boyne and J. Christopher Jackson and each of them, any of whom may act without the joinder of the others, as such person’s attorney-in-fact to sign and file on such person’s behalf individually and in the capacity stated below such registration statements, am

February 3, 2012 SC 13G/A

CGO / Calamos Global Total Return Fund / GUGGENHEIM FUNDS DISTRIBUTORS, INC. - CGO Passive Investment

OMB APPROVAL OMB Number: 3235-0145 Expires: December 31, 2005 Estimated average burden hours per response.

September 30, 2011 EX-99.N

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

Exhibit n CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM We consent to the incorporation by reference in this Post-Effective Amendment No.

September 30, 2011 EX-99.S

POWER OF ATTORNEY

exv99ws Exhibit s POWER OF ATTORNEY The person whose signature appears below hereby appoints John P.

September 30, 2011 EX-99.L.2

Opinion of K&L Gates LLP regarding Common Shares

exv99wlw2 Exhibit l.2 K&L Gates LLP 70 West Madison Street, Suite 3100 Chicago, Illinois 60602 312-372-1121 September 30, 2011 Calamos Global Total Return Fund 2020 Calamos Court Naperville, Illinois 60563 Ladies and Gentlemen: We have acted as your counsel in connection with the Registration Statement on Form N-2 (File No. 333- 174431), as amended by post-effective amendment no. 1 (the “Registrat

September 30, 2011 EX-99.L.3

Opinion of Morris, Nichols, Arsht and Tunnell LLP regarding Common Shares

exv99wlw3 Exhibit l.3 September 30, 2011 Calamos Global Total Return Fund 2020 Calamos Court Naperville, Illinois 60563 K&L Gates LLP 70 W. Madison Street Suite 3100 Chicago, Illinois 60602 Re: Calamos Global Total Return Fund Ladies and Gentlemen: We have acted as special Delaware counsel to Calamos Global Total Return Fund, a Delaware statutory trust (the “Trust”), in connection with certain mat

September 30, 2011 POS EX

- POS EX

posex As filed with the Securities and Exchange Commission on September 30, 2011 1933 Act File No.

September 30, 2011 COVER

-

COVER 9 filename9.htm K&L Gates LLP 1601 K Street, NW Washington, DC 20006-1600 T 202.778.9000 www.klgates.com September 30, 2011 Eric S. Purple D 202.778.9220 F 202.778.9220 [email protected] BY EDGAR Securities and Exchange Commission 100 F Street, N.E. Washington, DC 20549 Calamos Global Total Return Fund 333-174431 811-21547 Ladies and Gentlemen: On behalf of Calamos Global Total Return

September 30, 2011 EX-99.H.6

Sales Agreement relating to Common Shares dated September 30, 2011, among Registrant, Calamos Advisors LLC and JonesTrading Institutional Services LLC

exv99whw6 Exhibit h.6 CALAMOS GLOBAL TOTAL RETURN FUND UP TO 2,871,921 COMMON SHARES OF BENEFICIAL INTEREST CAPITAL ON DEMAND™ SALES AGREEMENT September 30, 2011 JONESTRADING INSTITUTIONAL SERVICES LLC 780 Third Avenue, 3rd Floor New York, NY 10017 Ladies and Gentlemen: CALAMOS GLOBAL TOTAL RETURN FUND, a Delaware statutory trust (the “Fund”), CALAMOS ADVISORS LLC, a Delaware limited liability com

September 19, 2011 EX-99.CERT

CERTIFICATION OF PRINCIPAL EXECUTIVE OFFICER

exv99wcert CERTIFICATION OF PRINCIPAL EXECUTIVE OFFICER I, John P. Calamos, Sr., certify that: 1. I have reviewed this report on Form N-Q of Calamos Global Total Return Fund; 2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements

September 19, 2011 N-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM N-Q QUARTERLY SCHEDULE OF PORTFOLIO HOLDINGS OF REGISTERED MANAGEMENT INVESTMENT COMPANIES

nvq UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM N-Q QUARTERLY SCHEDULE OF PORTFOLIO HOLDINGS OF REGISTERED MANAGEMENT INVESTMENT COMPANIES INVESTMENT COMPANY ACT FILE NUMBER: 811-21547 EXACT NAME OF REGISTRANT AS SPECIFIED IN CHARTER: Calamos Global Total Return Fund ADDRESS OF PRINCIPAL EXECUTIVE OFFICES: 2020 Calamos Court, Naperville Illinois 60563 NAME AND ADDR

August 24, 2011 CORRESP

-

corresp K&L Gates llp 1601 K Street NW Washington, DC 20006-1600 t 202.778.9000 www.klgates.com August 25, 2011 Mr. Larry Greene Division of Investment Management Securities and Exchange Commission 100 F Street, N.E. Washington, D.C. 20549 Calamos Global Total Return Fund 333-174431 811-21547 Dear Mr. Greene: This letter responds to your comment letter post-marked July 20, 2011 (the “Letter”) rega

August 24, 2011 CORRESP

-

corresp Calamos Advisors, LLC 2020 Calamos Court Naperville, Illinois 60563 Phone: 630-245-7200 www.

August 24, 2011 CORRESP

-

corresp Calamos Advisors, LLC 2020 Calamos Court Naperville, IL 60563 August 25, 2011 BY EDGAR Securities and Exchange Commission 100 F Street, N.

May 25, 2011 DEF 14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant þ Filed by a Party other than the Registrant o Check the appropriate box: o Preliminary Proxy Statement o Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) þ Defin

March 25, 2011 N-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM N-Q QUARTERLY SCHEDULE OF PORTFOLIO HOLDINGS OF REGISTERED MANAGEMENT INVESTMENT COMPANIES

nvq UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM N-Q QUARTERLY SCHEDULE OF PORTFOLIO HOLDINGS OF REGISTERED MANAGEMENT INVESTMENT COMPANIES INVESTMENT COMPANY ACT FILE NUMBER: 811-21547 EXACT NAME OF REGISTRANT AS SPECIFIED IN CHARTER: Calamos Global Total Return Fund ADDRESS OF PRINCIPAL EXECUTIVE OFFICES: 2020 Calamos Court, Naperville Illinois 60563 NAME AND ADDR

March 25, 2011 EX-99.CERT

CERTIFICATION OF PRINCIPAL EXECUTIVE OFFICER

CERTIFICATION OF PRINCIPAL EXECUTIVE OFFICER I, John P. Calamos, Sr., certify that: 1. I have reviewed this report on Form N-Q of Calamos Global Total Return Fund; 2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made,

March 1, 2011 EX-99.L.1

K&L Gates LLP 70 West Madison Street, Suite 3100 Chicago, Illinois 60602 312-372-1121 March 1, 2011

Exhibit l.1 K&L Gates LLP 70 West Madison Street, Suite 3100 Chicago, Illinois 60602 312-372-1121 March 1, 2011 Calamos Global Total Return Fund 2020 Calamos Court Naperville, Illinois 60563 Ladies and Gentlemen: We have acted as your counsel in connection with the Registration Statement on Form N-2 (File No. 333-146944), as amended by post-effective amendment no. 5 (the “Registration Statement”),

March 1, 2011 486BPOS

As filed with the Securities and Exchange Commission on March 1, 2011

e486bpos As filed with the Securities and Exchange Commission on March 1, 2011 1933 Act File No.

March 1, 2011 EX-99.N

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

Exhibit n CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM We consent to the use in this Post-Effective Amendment No.

March 1, 2011 EX-99.L.2

[Letterhead of Morris, Nichols, Arsht & Tunnell LLP] March 1, 2011

Exhibit l.2 [Letterhead of Morris, Nichols, Arsht & Tunnell LLP] March 1, 2011 Calamos Global Total Return Fund 2020 Calamos Court Naperville, Illinois 60563 K&L Gates LLP 70 W. Madison Street Suite 3100 Chicago, Illinois 60602 Re: Calamos Global Total Return Fund Ladies and Gentlemen: We have acted as special Delaware counsel to Calamos Global Total Return Fund, a Delaware statutory trust (the “T

March 1, 2011 EX-99.S

POWER OF ATTORNEY

exv99ws Exhibit s POWER OF ATTORNEY The person whose signature appears below hereby appoints John P.

January 28, 2011 SC 13G

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. )* Calamos Global Total Return Fund (Name of Issuer) Common Stock (Title of Class of Securities)

OMB APPROVAL OMB Number: 3235-0145 Expires: December 31, 2005 Estimated average burden hours per response.

September 21, 2010 EX-99.CERT

CERTIFICATION OF PRINCIPAL EXECUTIVE OFFICER

exv99wcert CERTIFICATION OF PRINCIPAL EXECUTIVE OFFICER I, John P. Calamos, Sr., certify that: 1. I have reviewed this report on Form N-Q of Calamos Global Total Return Fund; 2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements

September 21, 2010 N-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM N-Q QUARTERLY SCHEDULE OF PORTFOLIO HOLDINGS OF REGISTERED MANAGEMENT INVESTMENT COMPANIES

nvq UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM N-Q QUARTERLY SCHEDULE OF PORTFOLIO HOLDINGS OF REGISTERED MANAGEMENT INVESTMENT COMPANIES INVESTMENT COMPANY ACT FILE NUMBER: 811-21547 EXACT NAME OF REGISTRANT AS SPECIFIED IN CHARTER: Calamos Global Total Return Fund ADDRESS OF PRINCIPAL EXECUTIVE OFFICES: 2020 Calamos Court, Naperville Illinois 60563 NAME AND ADDR

May 10, 2010 DEF 14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant þ Filed by a Party other than the Registrant o Check the appropriate box: o Preliminary Proxy Statement o Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) þ Defin

March 23, 2010 N-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM N-Q QUARTERLY SCHEDULE OF PORTFOLIO HOLDINGS OF REGISTERED MANAGEMENT INVESTMENT COMPANIES

nvq UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM N-Q QUARTERLY SCHEDULE OF PORTFOLIO HOLDINGS OF REGISTERED MANAGEMENT INVESTMENT COMPANIES INVESTMENT COMPANY ACT FILE NUMBER: 811-21547 EXACT NAME OF REGISTRANT AS SPECIFIED IN CHARTER: Calamos Global Total Return Fund ADDRESS OF PRINCIPAL EXECUTIVE OFFICES: 2020 Calamos Court, Naperville Illinois 60563 NAME AND ADDR

March 23, 2010 EX-99.CERT

CERTIFICATION OF PRINCIPAL EXECUTIVE OFFICER

exv99wcert CERTIFICATION OF PRINCIPAL EXECUTIVE OFFICER I, John P. Calamos, Sr., certify that: 1. I have reviewed this report on Form N-Q of Calamos Global Total Return Fund; 2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements

March 5, 2010 EX-99.R.1

CALAMOS ASSET MANAGEMENT, INC. CALAMOS ADVISORS LLC CALAMOS FINANCIAL SERVICES LLC CALAMOS PARTNERS LLC CALAMOS WEALTH MANAGEMENT LLC CALAMOS INVESTMENT TRUST CALAMOS ADVISORS TRUST CALAMOS CONVERTIBLE OPPORTUNITIES AND INCOME FUND CALAMOS CONVERTIBL

exv99wrw1 Exhibit R1 CALAMOS ASSET MANAGEMENT, INC. CALAMOS ADVISORS LLC CALAMOS FINANCIAL SERVICES LLC CALAMOS PARTNERS LLC CALAMOS WEALTH MANAGEMENT LLC CALAMOS INVESTMENT TRUST CALAMOS ADVISORS TRUST CALAMOS CONVERTIBLE OPPORTUNITIES AND INCOME FUND CALAMOS CONVERTIBLE AND HIGH INCOME FUND CALAMOS STRATEGIC TOTAL RETURN FUND CALAMOS GLOBAL TOTAL RETURN FUND CALAMOS GLOBAL DYNAMIC INCOME FUND Co

March 5, 2010 EX-99.H.6

CALAMOS GLOBAL TOTAL RETURN FUND UP TO 3,000,000 COMMON SHARES OF BENEFICIAL INTEREST CAPITAL ON DEMAND? AMENDED AND RESTATED SALES AGREEMENT

exv99whw6 Exhibit h6 CALAMOS GLOBAL TOTAL RETURN FUND UP TO 3,000,000 COMMON SHARES OF BENEFICIAL INTEREST CAPITAL ON DEMAND™ AMENDED AND RESTATED SALES AGREEMENT March 5, 2010 JONESTRADING INSTITUTIONAL SERVICES LLC 780 Third Avenue, 3rd Floor New York, NY 10017 Ladies and Gentlemen: CALAMOS GLOBAL TOTAL RETURN FUND, a Delaware statutory trust (the “Fund”), CALAMOS ADVISORS LLC, a Delaware limited liability company (the “Adviser”) and JONESTRADING INSTITUTIONAL SERVICES LLC (“Jones”) previously entered into a sales agreement dated July 8, 2008 (the “Original Agreement”).

March 5, 2010 EX-99.N.1

/s/ DELOITTE & TOUCHE LLP Chicago, Illinois March 5, 2010

Exhibit n1 CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM We consent to the incorporation by reference in this Post-Effective Amendment No.

March 5, 2010 POS EX

As filed with the Securities and Exchange Commission on March 5, 2010

As filed with the Securities and Exchange Commission on March 5, 2010 1933 Act File No.

March 5, 2010 EX-99.S

POWER OF ATTORNEY

exv99ws Exhibit s POWER OF ATTORNEY The person whose signature appears below hereby appoints John P.

March 5, 2010 EX-99.J.1

Custody Agreement.

exv99wjw1 Exhibit J1 Execution Copy Master Custodian Agreement This Agreement is made as of September 11, 2009 by and among each management investment company identified on Appendix A hereto (each such investment company and each management investment company made subject to this Agreement in accordance with Section 19.

February 18, 2010 CORRESP

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corresp February 18, 2010 Mr. Larry Greene Division of Investment Management Securities and Exchange Commission 100 F Street, N.E. Washington, D.C. 20549 Calamos Global Total Return Fund 333-146944 811-21547 Dear Mr. Greene: This letter responds to the comments you verbally conveyed to me on October 8, 2009, regarding post-effective amendment no. 2 to the registration statement on Form N-2 of Cala

February 12, 2010 POS 8C

- FORM POS 8C

As filed with the Securities and Exchange Commission on February 12, 2010 1933 Act File No.

February 12, 2010 COVER

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cover K&L Gates LLP 70 West Madison Street Suite 3100 Chicago, IL 60602-4207 T 312.

February 12, 2010 EX-99.N.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

exv99wnw1 CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM We consent to the use in this Post-Effective Amendment No.

February 12, 2010 EX-99.S

POWER OF ATTORNEY

exv99ws Exhibit s POWER OF ATTORNEY The person whose signature appears below hereby appoints John P.

September 25, 2009 N-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM N-Q QUARTERLY SCHEDULE OF PORTFOLIO HOLDINGS OF REGISTERED MANAGEMENT INVESTMENT COMPANIES

nvq UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM N-Q QUARTERLY SCHEDULE OF PORTFOLIO HOLDINGS OF REGISTERED MANAGEMENT INVESTMENT COMPANIES INVESTMENT COMPANY ACT FILE NUMBER: 811-21547 EXACT NAME OF REGISTRANT AS SPECIFIED IN CHARTER: Calamos Global Total Return Fund ADDRESS OF PRINCIPAL EXECUTIVE OFFICES: 2020 Calamos Court, Naperville Illinois 60563 NAME AND ADDR

September 25, 2009 EX-99.CERT

CERTIFICATION OF PRINCIPAL EXECUTIVE OFFICER

exv99wcert CERTIFICATION OF PRINCIPAL EXECUTIVE OFFICER I, John P. Calamos, Sr., certify that: 1. I have reviewed this report on Form N-Q of Calamos Global Total Return Fund; 2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements

September 1, 2009 CORRESP

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K&L Gates llp 1601 K Street NW Washington, DC 20006-1600 T 202.778.9000 www.klgates.com September 1, 2009 Eric S. Purple D 202.778.9220 F 202.778-9100 [email protected] By E-mail and EDGAR Mr. Larry Greene Division of Investment Management Securities and Exchange Commission 100 F Street, N.E., Room 4700 Washington, D.C. 20549 Attn: Mr. Larry Greene Re: Calamos Global Total Return Fund (File

August 21, 2009 COVER

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cover August 20, 2009 Kevin R. Bettsteller D (312) 807-4442 F (312) 345-1383 [email protected] BY EDGAR Securities and Exchange Commission 100 F Street, N.E. Washington, DC 20549 Calamos Global Total Return Fund 333-146944 811-21547 Ladies and Gentlemen: On behalf of Calamos Global Total Return Fund (the “Fund”), we are transmitting for electronic filing Post—Effective Amendment No. 2

August 21, 2009 EX-99.(S)

POWER OF ATTORNEY

exv99wxsy Exhibit s POWER OF ATTORNEY The person whose signature appears below hereby appoints John P.

August 21, 2009 EX-99.(N)(2)

Deloitte & Touche LLP

EX-99.(N)(2) Exhibit N.2 Deloitte & Touche LLP 111 S. Wacker Drive Chicago, IL 60606-4301 USA Tel: +1 312 486 1000 Fax: +1 312 486 1486 www.deloitte.com August 20, 2009 Calamos Global Total Return Fund 2020 Calamos Court Naperville, Illinois 60563 We have reviewed, in accordance with the standards of the Public Company Accounting Oversight Board (United States), the unaudited interim financial inf

August 21, 2009 POS 8C

- POS 8C

As filed with the Securities and Exchange Commission on August 20, 2009 1933 Act File No.

August 21, 2009 EX-99.(R)(1)

CALAMOS ASSET MANAGEMENT, INC. CALAMOS ADVISORS LLC CALAMOS FINANCIAL SERVICES LLC CALAMOS PARTNERS LLC CALAMOS WEALTH MANAGEMENT LLC CALAMOS INVESTMENT TRUST CALAMOS ADVISORS TRUST CALAMOS CONVERTIBLE OPPORTUNITIES AND INCOME FUND CALAMOS CONVERTIBL

Exhibit r.1 CALAMOS ASSET MANAGEMENT, INC. CALAMOS ADVISORS LLC CALAMOS FINANCIAL SERVICES LLC CALAMOS PARTNERS LLC CALAMOS WEALTH MANAGEMENT LLC CALAMOS INVESTMENT TRUST CALAMOS ADVISORS TRUST CALAMOS CONVERTIBLE OPPORTUNITIES AND INCOME FUND CALAMOS CONVERTIBLE AND HIGH INCOME FUND CALAMOS STRATEGIC TOTAL RETURN FUND CALAMOS GLOBAL TOTAL RETURN FUND CALAMOS GLOBAL DYNAMIC INCOME FUND Code of Eth

August 21, 2009 EX-99.(N)(1)

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

EX-99(N)(1) Exhibit n.1 CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM We consent to the use in this Post-Effective Amendment No. 2 to Registration Statement No. 333-146944 on Form N-2 of our report dated December 18, 2008, relating to the financial statements and financial highlights of Calamos Global Total Return Fund appearing in the Statement of Additional Information, and to the ref

May 18, 2009 DEF 14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

DEF 14A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant þ Filed by a Party other than the Registrant o Check the appropriate box: o Preliminary Proxy Statement o Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2))

March 20, 2009 N-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM N-Q QUARTERLY SCHEDULE OF PORTFOLIO HOLDINGS OF REGISTERED MANAGEMENT INVESTMENT COMPANIES

N-Q UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM N-Q QUARTERLY SCHEDULE OF PORTFOLIO HOLDINGS OF REGISTERED MANAGEMENT INVESTMENT COMPANIES INVESTMENT COMPANY ACT FILE NUMBER: 811-21547 EXACT NAME OF REGISTRANT AS SPECIFIED IN CHARTER: Calamos Global Total Return Fund ADDRESS OF PRINCIPAL EXECUTIVE OFFICES: 2020 Calamos Court, Naperville Illinois 60563 NAME AND ADDR

March 20, 2009 EX-99.CERT

CERTIFICATION OF PRINCIPAL EXECUTIVE OFFICER

EX-99.CERT CERTIFICATION OF PRINCIPAL EXECUTIVE OFFICER I, John P. Calamos, Sr., certify that: 1. I have reviewed this report on Form N-Q of Calamos Global Total Return Fund; 2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements

September 25, 2008 N-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM N-Q QUARTERLY SCHEDULE OF PORTFOLIO HOLDINGS OF REGISTERED MANAGEMENT INVESTMENT COMPANIES

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM N-Q QUARTERLY SCHEDULE OF PORTFOLIO HOLDINGS OF REGISTERED MANAGEMENT INVESTMENT COMPANIES INVESTMENT COMPANY ACT FILE NUMBER: 811-21547 EXACT NAME OF REGISTRANT AS SPECIFIED IN CHARTER: Calamos Global Total Return Fund ADDRESS OF PRINCIPAL EXECUTIVE OFFICES: 2020 Calamos Court, Naperville Illinois 60563 NAME AND ADDRESS

September 25, 2008 EX-99.CERT

CERTIFICATION OF PRINCIPAL EXECUTIVE OFFICER

exv99wcert CERTIFICATION OF PRINCIPAL EXECUTIVE OFFICER I, John P. Calamos, Sr., certify that: 1. I have reviewed this report on Form N-Q of Calamos Global Total Return Fund; 2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements

July 8, 2008 EX-99.(N)

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

exv99wxny Exhibit n CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM We consent to the incorporation by reference in this Post-Effective Amendment No.

July 8, 2008 EX-99.(L)(3)

[Letterhead of Morris, Nichols, Arsht & Tunnell LLP] July 8, 2008

exv99wxlyx3y Exhibit l.3 [Letterhead of Morris, Nichols, Arsht & Tunnell LLP] July 8, 2008 Calamos Global Total Return Fund 2020 Calamos Court Naperville, Illinois 60563 Bell, Boyd & Lloyd LLP 70 W. Madison Street Suite 3100 Chicago, Illinois 60602 Re: Calamos Global Total Return Fund Ladies and Gentlemen: We have acted as special Delaware counsel to Calamos Global Total Return Fund, a Delaware st

July 8, 2008 POS EX

As filed with the Securities and Exchange Commission on July 8, 2008

As filed with the Securities and Exchange Commission on July 8, 2008 1933 Act File No.

July 8, 2008 EX-99.(L)(2)

[Bell, Boyd & Lloyd LLP Letterhead] July 8, 2008

exv99wxlyx2y Exhibit l.2 [Bell, Boyd & Lloyd LLP Letterhead] July 8, 2008 Calamos Global Total Return Fund 2020 Calamos Court Naperville, Illinois 60563 Ladies and Gentlemen: Calamos Global Total Return Fund We have acted as counsel for Calamos Global Total Return Fund (the “Fund”) in connection with the registration under the Securities Act of 1933, as amended (the “Act”), of certain of its commo

July 8, 2008 EX-99.(H)(6)

CALAMOS GLOBAL TOTAL RETURN FUND UP TO 3,000,000 COMMON SHARES OF BENEFICIAL INTEREST CAPITAL ON DEMAND? SALES AGREEMENT

exv99wxhyx6y Exhibit h.6 CALAMOS GLOBAL TOTAL RETURN FUND UP TO 3,000,000 COMMON SHARES OF BENEFICIAL INTEREST CAPITAL ON DEMAND™ SALES AGREEMENT July 8, 2008 JONESTRADING INSTITUTIONAL SERVICES LLC 780 Third Avenue, 3rd Floor New York, NY 10017 Ladies and Gentlemen: CALAMOS GLOBAL TOTAL RETURN FUND, a Delaware statutory trust (the “Fund”), and CALAMOS ADVISORS LLC, a Delaware limited liability co

May 12, 2008 DEF 14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant þ Filed by a Party other than the Registrant o Check the appropriate box: o Preliminary Proxy Statement o Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) þ Defin

March 24, 2008 N-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM N-Q QUARTERLY SCHEDULE OF PORTFOLIO HOLDINGS OF REGISTERED MANAGEMENT INVESTMENT COMPANIES

nvq UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM N-Q QUARTERLY SCHEDULE OF PORTFOLIO HOLDINGS OF REGISTERED MANAGEMENT INVESTMENT COMPANIES INVESTMENT COMPANY ACT FILE NUMBER: 811-21547 EXACT NAME OF REGISTRANT AS SPECIFIED IN CHARTER: Calamos Global Total Return Fund ADDRESS OF PRINCIPAL EXECUTIVE OFFICES: 2020 Calamos Court, Naperville Illinois 60563 NAME AND ADDR

March 24, 2008 EX-99.CERT

CERTIFICATION OF PRINCIPAL EXECUTIVE OFFICER

exv99wcert CERTIFICATION OF PRINCIPAL EXECUTIVE OFFICER I, John P. Calamos, Sr., certify that: 1. I have reviewed this report on Form N-Q of Calamos Global Total Return Fund; 2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements

March 7, 2008 CORRESP

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ROBERT W. DIXON 312-609-7742 [email protected] March 7, 2008 VIA E-MAIL AND EDGAR United States Securities and Exchange Commission Division of Investment Management 100 F Street, N.E. Washington, DC 20549 Attn: Mr. Larry L. Greene, Senior Counsel Re: Calamos Strategic Total Return Fund File Nos. 333-146943 and 811-21484 Calamos Convertible Opportunities and Income Fund File Nos. 333-146945 an

March 7, 2008 CORRESP

-

corresp March 7, 2008 VIA E-MAIL AND EDGAR Securities and Exchange Commission Division of Investment Management 100 F Street, N.

February 28, 2008 CORRESP

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DEBORAH BIELICKE EADES 312-609-7661 [email protected] VEDDER, PRICE P.C. 222 NORTH LASALLE STREET CHICAGO, ILLINOIS 60601 312-609-7500 FAX: 312-609-5005 CHICAGO • NEW YORK CITY • WASHINGTON, D.C. • ROSELAND, NJ February 28, 2008 VIA E-MAIL AND EDGAR United States Securities and Exchange Commission Division of Investment Management 100 F Street, N.E. Washington, DC 20549 Attn: Mr. Larry L. Gre

February 22, 2008 CORRESP

-

February 22, 2008 VIA E-MAIL AND EDGAR Securities and Exchange Commission Division of Investment Management 100 F Street, N.

February 22, 2008 CORRESP

-

ROBERT W. DIXON 312-609-7742 [email protected] February 22, 2008 VIA E-MAIL AND EDGAR United States Securities and Exchange Commission Division of Investment Management 100 F Street, N.E. Washington, DC 20549 Attn: Mr. Larry L. Greene, Senior Counsel Re: Calamos Strategic Total Return Fund File Nos. 333-146943 and 811-21484 Calamos Convertible Opportunities and Income Fund File Nos. 333-14694

January 30, 2008 CORRESP

-

ROBERT W. DIXON 312-609-7742 [email protected] January 30, 2008 United States Securities and Exchange Commission Division of Investment Management 100 F Street, N.E. Washington, DC 20549 Attn: Mr. Larry L. Greene, Senior Counsel Re: Calamos Strategic Total Return Fund File Nos. 333-146943; 811-21484 Calamos Convertible Opportunities and Income Fund File Nos. 333-146945; 811-21080 Calamos Conv

September 26, 2007 EX-99.CERT

CERTIFICATION OF PRINCIPAL EXECUTIVE OFFICER

CERTIFICATION OF PRINCIPAL EXECUTIVE OFFICER I, John P. Calamos, Sr., certify that: 1. I have reviewed this report on Form N-Q of Calamos Global Total Return Fund; 2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made,

September 26, 2007 N-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM N-Q QUARTERLY SCHEDULE OF PORTFOLIO HOLDINGS OF REGISTERED MANAGEMENT INVESTMENT COMPANIES

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM N-Q QUARTERLY SCHEDULE OF PORTFOLIO HOLDINGS OF REGISTERED MANAGEMENT INVESTMENT COMPANIES INVESTMENT COMPANY ACT FILE NUMBER: 811-21547 EXACT NAME OF REGISTRANT AS SPECIFIED IN CHARTER: Calamos Global Total Return Fund ADDRESS OF PRINCIPAL EXECUTIVE OFFICES: 2020 Calamos Court, Naperville Illinois 60563 NAME AND ADDRESS

May 25, 2007 DEF 14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant þ Filed by a Party other than the Registrant o Check the appropriate box: o Preliminary Proxy Statement o Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) þ Defin

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