GTE

SEC source: 0001104659-26-025658 · tm268448-1_4seq1.xml · nonDerivative · entry 1

Ellson Ryan · CIK 0001642213 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 90,363

F1 · price: Purchase price of security was transacted in Canadian currency and converted to U.S. currency.

SEC source: 0000935836-26-000143 · ownership.xml · nonDerivative · entry 3

LM Asset Management Inc. · CIK 0002057190 · 10% owner

Lau Daniel · CIK 0001950123 · 10% owner

Man Christine · CIK 0001950121 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Note

Disclosed balance after: 4,025,200

F4 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $6.33 to $6.48, inclusive. The reporting persons undertake 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.

F2 · ownership.nature: These securities are held by private investment funds managed by LM Asset Management Inc. ("LMAM"). LMAM may be deemed to beneficially own these securities as the investment adviser to those funds. Daniel Lau and Christine Man are control persons of LMAM and may be deemed to beneficially own these securities as control persons of LMAM. Each reporting person disclaims beneficial ownership of such securities except to the extent of their respective pecuniary interests therein.

SEC source: 0000935836-26-000143 · ownership.xml · nonDerivative · entry 2

LM Asset Management Inc. · CIK 0002057190 · 10% owner

Lau Daniel · CIK 0001950123 · 10% owner

Man Christine · CIK 0001950121 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Note

Disclosed balance after: 4,001,200

F3 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $6.45 to $6.73, inclusive. The reporting persons undertake 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.

F2 · ownership.nature: These securities are held by private investment funds managed by LM Asset Management Inc. ("LMAM"). LMAM may be deemed to beneficially own these securities as the investment adviser to those funds. Daniel Lau and Christine Man are control persons of LMAM and may be deemed to beneficially own these securities as control persons of LMAM. Each reporting person disclaims beneficial ownership of such securities except to the extent of their respective pecuniary interests therein.

SEC source: 0001104659-26-024313 · tm268189-4_4seq1.xml · nonDerivative · entry 1

Evans Jim · CIK 0001642276 · EVP, Corporate Services

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 48,216

F1 · kind: These shares were acquired on March 3, 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).

F2 · price: Purchase price of security was transacted in Canadian currency and converted to U.S. currency.

SEC source: 0001104659-26-024312 · tm268189-3_4seq1.xml · nonDerivative · entry 1

Guidry Gary · CIK 0001642424 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 502,768

F1 · kind: These shares were acquired on March 3, 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).

F2 · price: Purchase price of security was transacted in Canadian currency and converted to U.S. currency.

SEC source: 0001104659-26-024311 · tm268189-2_4seq1.xml · nonDerivative · entry 1

Abraham Phillip D · CIK 0001977506 · EVP, Legal and Land

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 41,157

F1 · kind: These shares were acquired on March 3, 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).

F2 · price: Purchase price of security was transacted in Canadian currency and converted to U.S. currency.

SEC source: 0001104659-26-024310 · tm268189-1_4seq1.xml · nonDerivative · entry 1

Morin Sebastien · CIK 0002001396 · Chief Operating Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 32,641

F1 · kind: These shares were acquired on March 3, 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).

F2 · price: Purchase price of security was transacted in Canadian currency and converted to U.S. currency.

SEC source: 0000935836-26-000143 · ownership.xml · nonDerivative · entry 1

LM Asset Management Inc. · CIK 0002057190 · 10% owner

Lau Daniel · CIK 0001950123 · 10% owner

Man Christine · CIK 0001950121 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Note

Disclosed balance after: 3,981,200

F1 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $6.40 to $6.50, inclusive. The reporting persons undertake 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.

F2 · ownership.nature: These securities are held by private investment funds managed by LM Asset Management Inc. ("LMAM"). LMAM may be deemed to beneficially own these securities as the investment adviser to those funds. Daniel Lau and Christine Man are control persons of LMAM and may be deemed to beneficially own these securities as control persons of LMAM. Each reporting person disclaims beneficial ownership of such securities except to the extent of their respective pecuniary interests therein.

SEC source: 0000935836-26-000121 · ownership.xml · nonDerivative · entry 3

LM Asset Management, Inc. · CIK 0002057190 · 10% owner

Lau Daniel · CIK 0001950123 · 10% owner

Man Christine · CIK 0001950121 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Note

Disclosed balance after: 207,000

F2 · ownership.nature: These securities are held by companies of which Daniel Lau and Christine Man are directors and controlling shareholders. They may be deemed to beneficially own these shares because they are control persons of those companies. They disclaim beneficial ownership of such securities except to the extent of their respective pecuniary interests therein.

SEC source: 0001104659-26-017744 · tm266906-4_4seq1.xml · nonDerivative · entry 1

Morin Sebastien · CIK 0002001396 · Chief Operating Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 32,177

F1 · kind: These shares were acquired on February 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).

F2 · price: Purchase price of security was transacted in Canadian currency and converted to U.S. currency.

SEC source: 0001104659-26-017742 · tm266906-3_4seq1.xml · nonDerivative · entry 1

Guidry Gary · CIK 0001642424 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 502,118

F1 · kind: These shares were acquired on February 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).

F2 · price: Purchase price of security was transacted in Canadian currency and converted to U.S. currency.

SEC source: 0001104659-26-017741 · tm266906-2_4seq1.xml · nonDerivative · entry 1

Evans Jim · CIK 0001642276 · EVP, Corporate Services

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 48,007

F1 · kind: These shares were acquired on February 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).

F2 · price: Purchase price of security was transacted in Canadian currency and converted to U.S. currency.

SEC source: 0001104659-26-017740 · tm266906-1_4seq1.xml · nonDerivative · entry 1

Abraham Phillip D · CIK 0001977506 · EVP, Legal and Land

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 40,786

F1 · kind: These shares were acquired on February 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).

F2 · price: Purchase price of security was transacted in Canadian currency and converted to U.S. currency.

SEC source: 0000935836-26-000121 · ownership.xml · nonDerivative · entry 2

LM Asset Management, Inc. · CIK 0002057190 · 10% owner

Lau Daniel · CIK 0001950123 · 10% owner

Man Christine · CIK 0001950121 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Note

Disclosed balance after: 187,000

F2 · ownership.nature: These securities are held by companies of which Daniel Lau and Christine Man are directors and controlling shareholders. They may be deemed to beneficially own these shares because they are control persons of those companies. They disclaim beneficial ownership of such securities except to the extent of their respective pecuniary interests therein.

SEC source: 0000935836-26-000121 · ownership.xml · nonDerivative · entry 1

LM Asset Management, Inc. · CIK 0002057190 · 10% owner

Lau Daniel · CIK 0001950123 · 10% owner

Man Christine · CIK 0001950121 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Note

Disclosed balance after: 177,000

F1 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $5.30 to $5.41, inclusive. The reporting persons undertake 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.

F2 · ownership.nature: These securities are held by companies of which Daniel Lau and Christine Man are directors and controlling shareholders. They may be deemed to beneficially own these shares because they are control persons of those companies. They disclaim beneficial ownership of such securities except to the extent of their respective pecuniary interests therein.

SEC source: 0001104659-26-009664 · tm264993-4_4seq1.xml · nonDerivative · entry 1

Abraham Phillip D · CIK 0001977506 · EVP, Legal and Land

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 40,351

F1 · kind: These shares were acquired on February 2, 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).

F2 · price: Purchase price of security was transacted in Canadian currency and converted to U.S. currency.

SEC source: 0001104659-26-009663 · tm264993-3_4seq1.xml · nonDerivative · entry 1

Guidry Gary · CIK 0001642424 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 501,357

F1 · kind: These shares were acquired on February 2, 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).

F2 · price: Purchase price of security was transacted in Canadian currency and converted to U.S. currency.

SEC source: 0001104659-26-009662 · tm264993-2_4seq1.xml · nonDerivative · entry 1

Morin Sebastien · CIK 0002001396 · Chief Operating Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 31,633

F1 · kind: These shares were acquired on February 2, 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).

F2 · price: Purchase price of security was transacted in Canadian currency and converted to U.S. currency.

SEC source: 0001104659-26-009660 · tm264993-1_4seq1.xml · nonDerivative · entry 1

Evans Jim · CIK 0001642276 · EVP, Corporate Services

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 47,762

F1 · kind: These shares were acquired on February 2, 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).

F2 · price: Purchase price of security was transacted in Canadian currency and converted to U.S. currency.

SEC source: 0001104659-26-005109 · tm263658-4_4seq1.xml · nonDerivative · entry 1

Morin Sebastien · CIK 0002001396 · Chief Operating Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 31,084

F1 · kind: These shares were acquired on January 19, 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).

F2 · price: Purchase price of security was transacted in Canadian currency and converted to U.S. currency.

SEC source: 0001104659-26-005108 · tm263658-3_4seq1.xml · nonDerivative · entry 1

Guidry Gary · CIK 0001642424 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 500,588

F1 · kind: These shares were acquired on January 19, 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).

F2 · price: Purchase price of security was transacted in Canadian currency and converted to U.S. currency.

SEC source: 0001104659-26-005104 · tm263658-2_4seq1.xml · nonDerivative · entry 1

Evans Jim · CIK 0001642276 · EVP, Corporate Services

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 47,515

F1 · kind: These shares were acquired on January 19, 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).

F2 · price: Purchase price of security was transacted in Canadian currency and converted to U.S. currency.

SEC source: 0001104659-26-005101 · tm263658-1_4seq1.xml · nonDerivative · entry 1

Abraham Phillip D · CIK 0001977506 · EVP, Legal and Land

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 39,912

F1 · kind: These shares were acquired on January 19, 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).

F2 · price: Purchase price of security was transacted in Canadian currency and converted to U.S. currency.

SEC source: 0000935836-26-000023 · ownership.xml · nonDerivative · entry 1

LM Asset (IM) Inc. · CIK 0002057190 · 10% owner

Lau Daniel · CIK 0001950123 · 10% owner

Man Christine · CIK 0001950121 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Note

Disclosed balance after: 3,931,200

F1 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $3.84 to $3.91, inclusive. The reporting persons undertake 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.

F2 · ownership.nature: These securities are held by private investment funds managed by LM Asset Management, Inc. ("LMAM"). LMAM may be deemed to beneficially own these securities as the investment adviser to those funds. Daniel Lau and Christine Man are control persons of LMAM and may be deemed to beneficially own these securities as control persons of LMAM. Each reporting person disclaims beneficial ownership of such securities except to the extent of their respect pecuniary interest therein.

SEC source: 0000935836-26-000014 · ownership.xml · nonDerivative · entry 2

LM Asset (IM) Inc. · CIK 0002057190 · 10% owner

Lau Daniel · CIK 0001950123 · 10% owner

Man Christine · CIK 0001950121 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Note

Disclosed balance after: 3,851,200

F3 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $3.98 to $4.05, inclusive.

F2 · ownership.nature: These securities are held by private investment funds managed by LM Asset Management, Inc. ("LMAM"). LMAM may be deemed to beneficially own these securities as the investment adviser to those funds. Daniel Lau and Christine Man are control persons of LMAM and may be deemed to beneficially own these securities as control persons of LMAM. Each reporting person disclaims beneficial ownership of such securities except to the extent of their respect pecuniary interest therein.

SEC source: 0000935836-26-000014 · ownership.xml · nonDerivative · entry 1

LM Asset (IM) Inc. · CIK 0002057190 · 10% owner

Lau Daniel · CIK 0001950123 · 10% owner

Man Christine · CIK 0001950121 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Note

Disclosed balance after: 3,771,200

F1 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $3.97 to $4.09, inclusive. The reporting persons undertake 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.

F2 · ownership.nature: These securities are held by private investment funds managed by LM Asset Management, Inc. ("LMAM"). LMAM may be deemed to beneficially own these securities as the investment adviser to those funds. Daniel Lau and Christine Man are control persons of LMAM and may be deemed to beneficially own these securities as control persons of LMAM. Each reporting person disclaims beneficial ownership of such securities except to the extent of their respect pecuniary interest therein.

SEC source: 0001104659-26-001527 · tm262343-2_4seq1.xml · derivative · entry 3

Royal Ronald · CIK 0001642113 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 7,829

Underlying: Common Stock · 3,021 shares

Expires 2025-12-31

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001104659-26-001527 · tm262343-2_4seq1.xml · nonDerivative · entry 2

Royal Ronald · CIK 0001642113 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

SEC source: 0001104659-26-001527 · tm262343-2_4seq1.xml · nonDerivative · entry 1

Royal Ronald · CIK 0001642113 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,021

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001104659-26-001529 · tm262343-3_4seq1.xml · derivative · entry 3

Smith David P · CIK 0001642280 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 19,120

Underlying: Common Stock · 3,021 shares

Expires 2025-12-31

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001104659-26-001529 · tm262343-3_4seq1.xml · nonDerivative · entry 2

Smith David P · CIK 0001642280 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 59,750

SEC source: 0001104659-26-001529 · tm262343-3_4seq1.xml · nonDerivative · entry 1

Smith David P · CIK 0001642280 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 62,771

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001104659-26-001526 · tm262343-1_4seq1.xml · derivative · entry 3

Hazell Evan · CIK 0001646362 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,865

Underlying: Common Stock · 3,021 shares

Expires 2025-12-31

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001104659-26-001526 · tm262343-1_4seq1.xml · nonDerivative · entry 2

Hazell Evan · CIK 0001646362 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,500

SEC source: 0001104659-26-001526 · tm262343-1_4seq1.xml · nonDerivative · entry 1

Hazell Evan · CIK 0001646362 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 8,521

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001104659-26-000891 · tm261982-2_4seq1.xml · derivative · entry 1

Virbitsky Brad · CIK 0002091043 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 43,917

Underlying: Common Stock · 43,917 shares

Expires not disclosed

F1 · derivative.exercise_price: Deferred stock units convert into common stock on a one-for-one basis.

F2 · derivative.exercise_date: Each deferred stock unit represents a contingent right to receive one share of Gran Tierra Energy Inc. common stock. The deferred stock units vest in full at such time as the reporting person ceases to be a member of the Board of Directors of the Issuer.

F2 · derivative.expiration_date: Each deferred stock unit represents a contingent right to receive one share of Gran Tierra Energy Inc. common stock. The deferred stock units vest in full at such time as the reporting person ceases to be a member of the Board of Directors of the Issuer.

SEC source: 0001104659-26-000900 · tm261982-6_4seq1.xml · derivative · entry 2

Redford Alison · CIK 0001881406 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 18,381

Underlying: Common Stock · 18,381 shares

Expires not disclosed

F1 · derivative.exercise_price: Deferred stock units (DSU) and restricted stock units (RSU) convert into common stock on a one-for-one basis.

F2 · derivative.exercise_date: Each RSU and DSU represents a contingent right to receive one share of Gran Tierra Energy Inc. common stock. The DSUs vest in full at such time as the reporting person ceases to be a member of the Board of Directors of the Issuer. RSUs will vest in three equal annual installments: 1/3 of the units will vest on 01/01/2027, an additional 1/3 will vest on 01/01/2028, and the remaining 1/3 will vest on 01/01/2029. Vested shares will be delivered to the reporting person upon vesting.

F2 · derivative.expiration_date: Each RSU and DSU represents a contingent right to receive one share of Gran Tierra Energy Inc. common stock. The DSUs vest in full at such time as the reporting person ceases to be a member of the Board of Directors of the Issuer. RSUs will vest in three equal annual installments: 1/3 of the units will vest on 01/01/2027, an additional 1/3 will vest on 01/01/2028, and the remaining 1/3 will vest on 01/01/2029. Vested shares will be delivered to the reporting person upon vesting.

SEC source: 0001104659-26-000900 · tm261982-6_4seq1.xml · derivative · entry 1

Redford Alison · CIK 0001881406 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 84,275

Underlying: Common Stock · 14,355 shares

Expires not disclosed

F1 · derivative.exercise_price: Deferred stock units (DSU) and restricted stock units (RSU) convert into common stock on a one-for-one basis.

F2 · derivative.exercise_date: Each RSU and DSU represents a contingent right to receive one share of Gran Tierra Energy Inc. common stock. The DSUs vest in full at such time as the reporting person ceases to be a member of the Board of Directors of the Issuer. RSUs will vest in three equal annual installments: 1/3 of the units will vest on 01/01/2027, an additional 1/3 will vest on 01/01/2028, and the remaining 1/3 will vest on 01/01/2029. Vested shares will be delivered to the reporting person upon vesting.

F2 · derivative.expiration_date: Each RSU and DSU represents a contingent right to receive one share of Gran Tierra Energy Inc. common stock. The DSUs vest in full at such time as the reporting person ceases to be a member of the Board of Directors of the Issuer. RSUs will vest in three equal annual installments: 1/3 of the units will vest on 01/01/2027, an additional 1/3 will vest on 01/01/2028, and the remaining 1/3 will vest on 01/01/2029. Vested shares will be delivered to the reporting person upon vesting.

SEC source: 0001104659-26-000902 · tm261982-7_4seq1.xml · derivative · entry 1

Royal Ronald · CIK 0001642113 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 220,599

Underlying: Common Stock · 38,550 shares

Expires not disclosed

F1 · derivative.exercise_price: Deferred stock units convert into common stock on a one-for-one basis.

F2 · derivative.exercise_date: Each deferred stock unit represents a contingent right to receive one share of Gran Tierra Energy Inc. common stock. The deferred stock units vest in full at such time as the reporting person ceases to be a member of the Board of Directors of the Issuer.

F2 · derivative.expiration_date: Each deferred stock unit represents a contingent right to receive one share of Gran Tierra Energy Inc. common stock. The deferred stock units vest in full at such time as the reporting person ceases to be a member of the Board of Directors of the Issuer.

SEC source: 0001104659-26-000899 · tm261982-5_4seq1.xml · derivative · entry 1

Hodgins Robert B. · CIK 0001642212 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 191,629

Underlying: Common Stock · 33,989 shares

Expires not disclosed

F1 · derivative.exercise_price: Deferred stock units convert into common stock on a one-for-one basis.

F2 · derivative.exercise_date: Each deferred stock unit represents a contingent right to receive one share of Gran Tierra Energy Inc. common stock. The deferred stock units vest in full at such time as the reporting person ceases to be a member of the Board of Directors of the Issuer.

F2 · derivative.expiration_date: Each deferred stock unit represents a contingent right to receive one share of Gran Tierra Energy Inc. common stock. The deferred stock units vest in full at such time as the reporting person ceases to be a member of the Board of Directors of the Issuer.

SEC source: 0001104659-26-000895 · tm261982-4_4seq1.xml · derivative · entry 1

Hazell Evan · CIK 0001646362 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 190,877

Underlying: Common Stock · 39,445 shares

Expires not disclosed

F1 · derivative.exercise_price: Deferred stock units convert into common stock on a one-for-one basis.

F2 · derivative.exercise_date: Each deferred stock unit represents a contingent right to receive one share of Gran Tierra Energy Inc. common stock. The deferred stock units vest in full at such time as the reporting person ceases to be a member of the Board of Directors of the Issuer.

F2 · derivative.expiration_date: Each deferred stock unit represents a contingent right to receive one share of Gran Tierra Energy Inc. common stock. The deferred stock units vest in full at such time as the reporting person ceases to be a member of the Board of Directors of the Issuer.

SEC source: 0001104659-26-000894 · tm261982-3_4seq1.xml · derivative · entry 1

Wade Brooke N. · CIK 0001646479 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 243,854

Underlying: Common Stock · 49,284 shares

Expires not disclosed

F1 · derivative.exercise_price: Deferred stock units convert into common stock on a one-for-one basis.

F2 · derivative.exercise_date: Each deferred stock unit represents a contingent right to receive one share of Gran Tierra Energy Inc. common stock. The deferred stock units vest in full at such time as the reporting person ceases to be a member of the Board of Directors of the Issuer.

F2 · derivative.expiration_date: Each deferred stock unit represents a contingent right to receive one share of Gran Tierra Energy Inc. common stock. The deferred stock units vest in full at such time as the reporting person ceases to be a member of the Board of Directors of the Issuer.

SEC source: 0001104659-26-000887 · tm261982-1_4seq1.xml · derivative · entry 1

Scott Sondra · CIK 0001717040 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 85,435

Underlying: Common Stock · 9,856 shares

Expires not disclosed

F1 · derivative.exercise_price: Deferred stock units convert into common stock on a one-for-one basis.

F2 · derivative.exercise_date: Each deferred stock unit represents a contingent right to receive one share of Gran Tierra Energy Inc. common stock. The deferred stock units vest in full at such time as the reporting person ceases to be a member of the Board of Directors of the Issuer.

F2 · derivative.expiration_date: Each deferred stock unit represents a contingent right to receive one share of Gran Tierra Energy Inc. common stock. The deferred stock units vest in full at such time as the reporting person ceases to be a member of the Board of Directors of the Issuer.

SEC source: 0001104659-26-000184 · tm261723-4_4seq1.xml · nonDerivative · entry 1

Morin Sebastien · CIK 0002001396 · Chief Operating Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 30,486

F1 · kind: These shares were acquired on December 30, 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).

F2 · price: Purchase price of security was transacted in Canadian currency and converted to U.S. currency.

SEC source: 0001104659-26-000183 · tm261723-3_4seq1.xml · nonDerivative · entry 1

Abraham Phillip D · CIK 0001977506 · EVP, Legal and Land

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 39,434

F1 · kind: These shares were acquired on December 30, 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).

F2 · price: Purchase price of security was transacted in Canadian currency and converted to U.S. currency.

SEC source: 0001104659-26-000181 · tm261723-1_4seq1.xml · nonDerivative · entry 1

Guidry Gary · CIK 0001642424 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 499,751

F1 · kind: These shares were acquired on December 30, 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).

F2 · price: Purchase price of security was transacted in Canadian currency and converted to U.S. currency.

SEC source: 0001104659-26-000182 · tm261723-2_4seq1.xml · nonDerivative · entry 1

Evans Jim · CIK 0001642276 · EVP, Corporate Services

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 47,246

F1 · kind: These shares were acquired on December 30, 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).

F2 · price: Purchase price of security was transacted in Canadian currency and converted to U.S. currency.

SEC source: 0000935836-25-000733 · ownership.xml · nonDerivative · entry 1

LM Asset (IM) Inc. · CIK 0002057190 · 10% owner

Lau Daniel · CIK 0001950123 · 10% owner

Man Christine · CIK 0001950121 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Note

Disclosed balance after: 3,671,200

F1 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $3.83 to $3.91, inclusive. The reporting persons undertake 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.

F2 · ownership.nature: These securities are held by private investment funds managed by LM Asset (IM) Inc. ("LMAIM"). LMAIM may be deemed to beneficially own these securities as the investment adviser to those funds. Daniel Lau and Christine Man are control persons of LMAIM and may be deemed to beneficially own these securities as control persons of LMAIM. Each reporting person disclaims beneficial ownership of such securities except to the extent of their respective pecuniary interests therein.

SEC source: 0000935836-25-000730 · ownership.xml · nonDerivative · entry 1

Lau Daniel · CIK 0001950123 · 10% owner

10b5-1 filing: No plan indicated

Ownership: Indirect · See Note

Disclosed balance after: 3,531,200

F1 · price: 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.

F2 · ownership.nature: 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.

SEC source: 0001104659-25-121727 · tm2533714-5_4seq1.xml · nonDerivative · entry 1

Guidry Gary · CIK 0001642424 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 498,736

F1 · kind: 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).

F2 · price: Purchase price of security was transacted in Canadian currency and converted to U.S. currency.