Gran Tierra CEO buys 394 shares at $10.59

Gran Tierra Energy’s CEO and director acquired additional shares via the employee stock purchase plan, increasing his direct common stock holdings.

Available on EDGAR 09/21/2026 - 04:36 PM EDT Accepted by SEC EDGAR 09/21/2026 - 04:33 PM EDT Learn about SEC filing dates

Rhea-AI Filing Summary

GRAN TIERRA ENERGY INC. (GTE) reported that President and CEO and director Gary Guidry acquired 394 shares of common stock on September 17, 2026. The shares were obtained through the Gran Tierra Inc. Employee Stock Purchase Plan at a price of $10.59 per share, with the purchase price transacted in Canadian currency and converted to U.S. currency. Following this acquisition, Guidry directly holds 509,382 common shares. The transaction was exempt under Rule 16b-3(d) and Rule 16b-3(c).

Insider Trade Summary

Grant/Award: 394 shares

Grant/Award 1 txn

Insider Guidry Gary

Role President and CEO

Type	Security	Shares	Price	Value
Grant/Award	Common Stock F1, F2	394	$10.59	$4K

Holdings After Transaction: Common Stock — 509,382 shares (Direct)

Footnotes (2)

1. F1. These shares were acquired on September 17, 2026 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. F2. Purchase price of security was transacted in Canadian currency and converted to U.S. currency.

Key Figures

Shares acquired: 394 shares Purchase price per share: $10.59 per share Total direct holdings after transaction: 509,382 shares +1 more

4 metrics

Shares acquired 394 shares Common stock acquired on September 17, 2026 through the Employee Stock Purchase Plan

Purchase price per share $10.59 per share Price for the 394 shares acquired, transacted in Canadian currency and converted to U.S. currency

Total direct holdings after transaction 509,382 shares Direct common stock holdings of Gary Guidry following the reported acquisition

Transactions reported 1 acquisition transaction One non-derivative grant/award acquisition of common stock reported in the Form 4

Key Terms

Employee Stock Purchase Plan, Rule 16b-3(d), Rule 16b-3(c), Form 4

4 terms

Employee Stock Purchase Plan financial

"acquired on September 17, 2026 through the Gran Tierra Inc. Employee Stock Purchase Plan"

An employee stock purchase plan is a company program that lets workers buy shares through small payroll deductions, often at a discount to the market price and after a set offering period. Think of it like a workplace savings plan that turns into ownership: it encourages employees to share in the company’s success and can create predictable buying or selling of stock that investors watch because it affects supply, demand and employee incentives.

Rule 16b-3(d) regulatory

"in a transaction that was exempt under both Rule 16b-3(d) and Rule 16b-3(c)"

Rule 16b-3(d) is a narrow SEC safe-harbor that shields company insiders (officers, directors and large shareholders) from liability for short‑swing profits when their buys or sells of company stock are made under a pre-established, written plan or contract that removes the insider’s ability to time trades. For investors, this matters because it permits predictable, automated insider transactions — like scheduled sales for diversification or payroll withholding — without triggering forced disgorgement, so such planned trades are treated differently from opportunistic insider trading.

Rule 16b-3(c) regulatory

"in a transaction that was exempt under both Rule 16b-3(d) and Rule 16b-3(c)"

An SEC rule that lets corporate insiders avoid automatic "short‑swing" profit recovery when they buy or sell their company’s stock under a pre‑approved, written plan that meets specific conditions. For investors, it matters because it clarifies when insider trades are treated as routine, reducing legal uncertainty and helping distinguish trades made for ordinary compensation or pre‑planned reasons from those that might signal opportunistic or timely insider advantage.

Form 4 regulatory

"reported in the Form 4 filing"

Form 4 is a official document that company insiders, such as executives or major shareholders, file with regulators whenever they buy or sell company shares. It provides transparency about how those with inside knowledge are trading, helping investors see if insiders are confident in the company's prospects or may be selling for personal reasons. This information can influence investor decisions by revealing insiders' perspectives on the company's value.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What insider transaction did GTE report for President and CEO Gary Guidry?

Gary Guidry acquired 394 shares of Gran Tierra Energy common stock on September 17, 2026 through the Gran Tierra Inc. Employee Stock Purchase Plan at $10.59 per share, with the purchase price initially in Canadian currency and converted to U.S. currency.

How many GTE shares does Gary Guidry hold after this transaction?

After the September 17, 2026 acquisition, Gary Guidry directly holds 509,382 shares of Gran Tierra Energy common stock, as reported in the Form 4 filing.

Was Gary Guidry’s GTE share acquisition made under a Rule 10b5-1 trading plan?

No. The Form 4 indicates no Rule 10b5-1 plan for this transaction. Instead, the shares were acquired through the Gran Tierra Inc. Employee Stock Purchase Plan.

How were the purchase proceeds for the GTE shares denominated?

The filing states that the purchase price for the acquired Gran Tierra Energy shares was transacted in Canadian currency and then converted to U.S. currency for reporting.

Under what SEC rules was this GTE insider transaction exempt?

The acquisition of shares through the Gran Tierra Inc. Employee Stock Purchase Plan was reported as exempt under Rule 16b-3(d) and Rule 16b-3(c) of the Securities Exchange Act.

AI-generated analysis. How Rhea-AI works. Not financial advice.

Form 4 Insider Transactions: What Each Field Means →

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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 T2G 1A6

(City) (State) (Zip)

ALBERTA, CANADA

(Country)

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
09/17/2026

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

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

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

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	09/17/2026		A(1)		394	A	$10.59(2)	509,382	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 17, 2026 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	09/21/2026
	** 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.
* Form 4: SEC 1474 (03-26)