Gran Tierra Energy (NYSE: GTE) CEO adds 1,071 shares in ESPP buy December 16, 2025

Rhea-AI Filing Summary

Gran Tierra Energy Inc. reported an insider share purchase by a person who serves as both a director and the company’s President and CEO. On December 16, 2025, this insider acquired 1,071 shares of common stock at a price of $3.96 per share.

The filing states these shares were obtained through the Gran Tierra Inc. Employee Stock Purchase Plan in a transaction exempt under Rule 16b-3(d) and Rule 16b-3(c). Following this purchase, the reporting person beneficially owns 498,736 shares of Gran Tierra Energy common stock, held directly. The purchase price was originally transacted in Canadian dollars and then converted to U.S. currency for reporting.

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).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

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)
12/16/2025

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	12/16/2025		A(1)		1,071	A	$3.96(2)	498,736	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 December 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	12/16/2025
	** 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 insider transaction did Gran Tierra Energy (GTE) report on December 16, 2025?

The company reported that a director who is also its President and CEO acquired 1,071 shares of Gran Tierra Energy common stock on December 16, 2025 at a price of $3.96 per share.

How many Gran Tierra Energy (GTE) shares does the reporting person own after this transaction?

After the reported transaction, the reporting person beneficially owns 498,736 shares of Gran Tierra Energy common stock, held directly.

At what price were the Gran Tierra Energy (GTE) shares acquired in this insider purchase?

The 1,071 shares were acquired at a price of $3.96 per share, with the purchase price originally transacted in Canadian currency and converted to U.S. currency for reporting.

Under what plan were the shares in this Gran Tierra Energy (GTE) insider transaction acquired?

The filing states the shares were acquired through the Gran Tierra Inc. Employee Stock Purchase Plan in a transaction exempt under Rule 16b-3(d) and Rule 16b-3(c).

What is the relationship of the reporting person to Gran Tierra Energy (GTE)?

The reporting person is both a director of Gran Tierra Energy Inc. and an officer, serving as the company’s President and CEO.

Is the Gran Tierra Energy (GTE) insider transaction reported as a direct or indirect holding?

The 498,736 shares beneficially owned following the transaction are reported as held in direct ownership.