Gran Tierra Energy (GTE) director and 10% owner reports 360,000-share buy

Rhea-AI Filing Summary

Gran Tierra Energy Inc. director and 10% owner Daniel Lau reported buying additional common stock. On 12/18/2025, he purchased 360,000 shares of Gran Tierra Energy common stock with transaction code "P," indicating a purchase. The reported weighted average purchase price was $3.9548 per share, with individual trades executed between $3.92 and $3.99.

Following this transaction, Lau was reported to beneficially own 3,531,200 shares of Gran Tierra Energy common stock held indirectly. These securities are held by private investment funds managed by an investment advisory firm for which Lau is a control person, and he disclaims beneficial ownership except to the extent of his pecuniary interest.

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

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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^*

Lau Daniel

(Last) (First) (Middle)

915 1055 WEST HASTINGS STREET

(Street)

VANCOUVER A1 V6E 2E9

(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)

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

3. Date of Earliest Transaction (Month/Day/Year)
12/18/2025

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	12/18/2025		P		360,000	A	$3.9548(1)	3,531,200	I	See Note(2)
Common Stock								240,000	D
Common Stock								145,000	I	See Note(3)

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. The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $3.92 to $3.99, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission upon request, full information regarding the number of shares purchased at each separate price within the ranges set forth in this footnote.

2. These securities are held by private investment funds managed by an investment advisory firm of which Mr. Lau is a control person. He disclaims beneficial ownership of such securities except to the extent of his pecuniary interest therein.

3. These securities are held by companies of which Mr. Lau is a director and controlling shareholder. He disclaims beneficial ownership of such securities except to the extent of his pecuniary interest therein.

	/s/ Daniel Lau	12/19/2025
	** 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 for Daniel Lau?

Daniel Lau, a director and 10% owner of Gran Tierra Energy Inc., reported purchasing 360,000 shares of the company’s common stock on 12/18/2025.

At what price did Daniel Lau buy Gran Tierra Energy (GTE) shares?

The filing states a weighted average price of $3.9548 per share for the 360,000 purchased shares, with individual trades between $3.92 and $3.99.

How many Gran Tierra Energy (GTE) shares does Daniel Lau beneficially own after the transaction?

After the reported transaction, Daniel Lau is shown as beneficially owning 3,531,200 shares of Gran Tierra Energy common stock held indirectly.

How does Daniel Lau hold his Gran Tierra Energy (GTE) shares?

The filing explains that the reported securities are held by private investment funds managed by an investment advisory firm of which Lau is a control person. He disclaims beneficial ownership except to the extent of his pecuniary interest.

What transaction code was used in Daniel Lau’s Gran Tierra Energy (GTE) Form 4?

The transaction is coded as "P", which indicates a purchase of common stock.

Is Daniel Lau a director or officer of Gran Tierra Energy (GTE)?

The filing identifies Daniel Lau as a director and 10% owner of Gran Tierra Energy Inc.