[8-K] Gran Tierra Energy Inc. Reports Material Event

Rhea-AI Filing Summary

Gran Tierra Energy Inc. (NYSE American/TSX/LSE: GTE) has disclosed, via Form 8-K, the imminent resignation of long-standing director Peter Dey. Mr. Dey notified the Board on June 18, 2025 that he will step down for personal reasons, effective June 30, 2025. The filing states explicitly that his departure is unrelated to any disagreement with management or the Company’s operations, policies, or practices. The Board has begun a search process to identify a new independent director.

The 8-K contains no financial data, earnings figures, or strategic transaction details; therefore, the disclosure is limited to a single governance matter. From an investor standpoint, the key takeaway is that the transition appears orderly and voluntary, minimizing concerns about internal conflict or immediate strategic shifts. Nonetheless, investors may wish to monitor how promptly a qualified replacement is appointed and whether the Board’s overall mix of skills and independence is affected in the interim.

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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 18, 2025

GRAN TIERRA ENERGY INC.

(Exact Name of Registrant as Specified in its Charter)

Delaware		001-34018		98-0479924
(State or Other Jurisdiction of Incorporation)		(Commission File Number)		(IRS Employer Identification No.)

500 Centre Street S.E.
Calgary, Alberta, Canada
T2G 1A6

(Address of Principal Executive Offices)

(Zip Code)

(403) 265-3221

(Registrant’s Telephone Number, Including Area Code)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

¨	Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)
¨	Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)
¨	Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))
¨	Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of each class	Trading Symbol(s)	Name of each exchange on which registered
Common Stock, par value $0.001 per share	GTE	NYSE American Toronto Stock Exchange London Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company  ¨

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.  ¨

Item 5.02. Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Offices

(b)       On June 18, 2025, Peter Dey informed the Board of Directors (the “Board”) of Gran Tierra Energy Inc. (the “Company”) that he will resign for personal reasons from the Board effective June 30, 2025. The Board intends to conduct a search for a new director. Mr. Dey’s resignation was not the result of any disagreement with the Company on any matter.

SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

Date: June 20, 2025	GRAN TIERRA ENERGY INC.
	By:	/s/ Ryan Ellson
		Name:  Ryan Ellson
		Title:    Executive Vice President and Chief Financial Officer