[Form 4] GRAN TIERRA ENERGY INC. Insider Trading Activity

Rhea-AI Filing Summary

Gary Guidry, President and CEO and a director of Gran Tierra Energy Inc. (GTE), reported acquiring 1,065 shares of the issuer's common stock on 09/16/2025 through the company's Employee Stock Purchase Plan. The purchase was reported at a price of $3.98 (proceeds converted from Canadian dollars to U.S. dollars) and the transaction was noted as exempt under Rule 16b-3(d) and 16b-3(c). Following the transaction, Mr. Guidry beneficially owns 492,665 shares. The Form 4 was signed by an attorney-in-fact, Phillip Abraham, on 09/29/2025.

Positive

• Insider acquisition disclosed by the President and CEO, showing compliance with Section 16 reporting requirements
• Transaction qualified for Rule 16b-3(c) and 16b-3(d) exemptions, indicating it was executed through the company ESPP

Negative

• None.

Insights

Corporate Governance Expert

TL;DR: Insider acquisition via ESPP disclosed; routine, compliant with Rule 16b-3 exemptions.

This Form 4 documents a small purchase by the company's President and CEO under the Employee Stock Purchase Plan. The filing explicitly states the transaction qualified for Rule 16b-3(c) and (d) exemptions, indicating it was a company-approved, routine employee plan transaction rather than a negotiated private purchase. The disclosure and signature by an attorney-in-fact meet Section 16 reporting requirements. The filing does not include additional context such as percentage ownership change or whether the shares were newly issued or purchased on market beyond what is stated.

Securities Analyst

TL;DR: CEO acquired 1,065 shares at CAD-converted $3.98; ownership now 492,665 shares.

The reported purchase is modest in size and occurred through the ESPP on 09/16/2025 at a reported price of $3.98 after currency conversion. The filing provides clear quantitative details: number of shares acquired and total beneficial ownership after the transaction. There is no earnings or material corporate event information in this filing. As disclosed, the transaction was processed under the stated Rule 16b-3 exemptions applicable to employee benefit plans, suggesting standard administrative handling and compliance with Section 16 reporting rules.

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

1. Name and Address of Reporting Person^*

Guidry Gary

(Last) (First) (Middle)

C/O GRAN TIERRA ENERGY INC.

500 CENTRE STREET SE

(Street)

CALGARY A0 T2G 1A6

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
GRAN TIERRA ENERGY INC. [ GTE ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	President and CEO

3. Date of Earliest Transaction (Month/Day/Year)
09/16/2025

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	09/16/2025		A(1)		1,065	A	$3.98(2)	492,665	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. These shares were acquired on September 16, 2025 through the Gran Tierra Inc. Employee Stock Purchase Plan in a transaction that was exempt under both Rule 16b-3(d) and Rule 16b-3(c).

2. Purchase price of security was transacted in Canadian currency and converted to U.S. currency.

	/s/ Phillip Abraham, Attorney-In Fact	09/29/2025
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

FAQ

What did Gran Tierra Energy (GTE) insider Gary Guidry report buying?

He reported acquiring 1,065 shares of Gran Tierra Energy common stock through the Employee Stock Purchase Plan.

At what price were the GTE shares purchased by the insider?

The purchase price was reported as $3.98, converted from Canadian currency to U.S. dollars.

How many GTE shares does Gary Guidry beneficially own after the transaction?

Following the reported transaction, he beneficially owns 492,665 shares.

When was the transaction executed and when was the Form 4 signed?

The transaction date was 09/16/2025 and the Form 4 was signed by an attorney-in-fact on 09/29/2025.

Was the insider transaction subject to any exemptions?

Yes. The filing states the acquisition was exempt under Rule 16b-3(d) and Rule 16b-3(c) for employee plan transactions.