# EDGAR Filing Document

**Accession Number:** 0001273441
**File Stem:** 0001013594-25-001347
**Filing Date:** 2025-11
**Character Count:** 24131
**Document Hash:** f7fd148b9e528b33c70efc05f2271e76
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001013594-25-001347.hdr.sgml**: 20251107

**ACCESSION NUMBER**: 0001013594-25-001347

**CONFORMED SUBMISSION TYPE**: SCHEDULE 13D/A

**PUBLIC DOCUMENT COUNT**: 2

**FILED AS OF DATE**: 20251107

**DATE AS OF CHANGE**: 20251107

**SUBJECT COMPANY**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** GRAN TIERRA ENERGY INC.
- **CENTRAL INDEX KEY:** 0001273441
- **STANDARD INDUSTRIAL CLASSIFICATION:** CRUDE PETROLEUM & NATURAL GAS [1311]
- **ORGANIZATION NAME:** 01 Energy & Transportation
- **EIN:** 000000000
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** SCHEDULE 13D/A
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 005-83601
- **FILM NUMBER:** 251464118

**BUSINESS ADDRESS:**
- **STREET 1:** 500 CENTRE STREET SE
- **CITY:** CALGARY
- **STATE:** A0
- **ZIP:** T2G 1A6
- **BUSINESS PHONE:** (403) 265-3221

**MAIL ADDRESS:**
- **STREET 1:** 500 CENTRE STREET SE
- **CITY:** CALGARY
- **STATE:** A0
- **ZIP:** T2G 1A6

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** GRAN TIERRA ENERGY, INC.
- **DATE OF NAME CHANGE:** 20051130

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** GOLDSTRIKE INC
- **DATE OF NAME CHANGE:** 20040113

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** GOLKSTRIKE INC
- **DATE OF NAME CHANGE:** 20031216
**FILED BY**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Equinox Partners Investment Management LLC
- **CENTRAL INDEX KEY:** 0000938552

**ORGANIZATION NAME:**
- **EIN:** 133360821
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** SCHEDULE 13D/A

**BUSINESS ADDRESS:**
- **STREET 1:** THREE STAMFORD PLAZA
- **STREET 2:** 301 TRESSER BLVD, 13TH FL
- **CITY:** STAMFORD
- **STATE:** CT
- **ZIP:** 06901
- **BUSINESS PHONE:** 203-516-2270

**MAIL ADDRESS:**
- **STREET 1:** THREE STAMFORD PLAZA
- **STREET 2:** 301 TRESSER BLVD, 13TH FL
- **CITY:** STAMFORD
- **STATE:** CT
- **ZIP:** 06901

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** Equinox Partners Investment Management
- **DATE OF NAME CHANGE:** 20201005

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** MASON HILL ADVISORS LLC
- **DATE OF NAME CHANGE:** 20120913

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** MASON HILL ASSET MANAGEMENT INCET AL
- **DATE OF NAME CHANGE:** 19950221

## Ex-99

**<u>Schedule 1</u>**

Transactions in the Common Stock of the Issuer by Reporting Persons During the Past 60 Days

---

| | | | | | | | | |
|:---|:---|:---|:---|:---|:---|:---|:---|:---|
| &nbsp;&nbsp; <u>Date</u>  | &nbsp;&nbsp; <u>Buy/Sell</u>  | &nbsp;&nbsp; <u>Buy/Sell</u>  | &nbsp;&nbsp; <u>Buy/Sell</u>  | &nbsp;&nbsp; <u>Security</u>  | &nbsp;&nbsp; <u>Security</u>  | &nbsp;&nbsp; Approximate <br> <u>Price Per Share</u><sup>1</sup>  | &nbsp;&nbsp; Approximate <br> <u>Price Per Share</u><sup>1</sup>  | &nbsp;&nbsp; Amount of Shares <u>Bought/(Sold)</u>  |
| &nbsp;&nbsp; <br> **Equinox Partners, L.P.**  | &nbsp;&nbsp; <br> **Equinox Partners, L.P.**  | &nbsp;&nbsp; <br> **Equinox Partners, L.P.**  | &nbsp;&nbsp; <br> **Equinox Partners, L.P.**  | &nbsp;&nbsp; <br> **Equinox Partners, L.P.**  | &nbsp;&nbsp; <br> **Equinox Partners, L.P.**  | &nbsp;&nbsp; <br> **Equinox Partners, L.P.**  | &nbsp;&nbsp; <br> **Equinox Partners, L.P.**  | &nbsp;&nbsp; <br> **Equinox Partners, L.P.**  |
| &nbsp;&nbsp; 11/04/2025  | &nbsp;&nbsp; 11/04/2025  | &nbsp;&nbsp; BUY  | &nbsp;&nbsp; Common Stock  | &nbsp;&nbsp; Common Stock  | &nbsp;&nbsp; $3.79  | &nbsp;&nbsp; $3.79  | &nbsp;&nbsp; 91908  | &nbsp;&nbsp; 91908  |
| &nbsp;&nbsp; 11/05/2025  | &nbsp;&nbsp; 11/05/2025  | &nbsp;&nbsp; BUY  | &nbsp;&nbsp; Common Stock  | &nbsp;&nbsp; Common Stock  | &nbsp;&nbsp; $4.02  | &nbsp;&nbsp; $4.02  | &nbsp;&nbsp; 57276  | &nbsp;&nbsp; 57276  |
| &nbsp;&nbsp; 11/06/2025  | &nbsp;&nbsp; 11/06/2025  | &nbsp;&nbsp; BUY  | &nbsp;&nbsp; Common Stock  | &nbsp;&nbsp; Common Stock  | &nbsp;&nbsp; $4.07  | &nbsp;&nbsp; $4.07  | &nbsp;&nbsp; 66600  | &nbsp;&nbsp; 66600  |
| &nbsp;&nbsp; 11/07/2025  | &nbsp;&nbsp; 11/07/2025  | &nbsp;&nbsp; BUY  | &nbsp;&nbsp; Common Stock  | &nbsp;&nbsp; Common Stock  | &nbsp;&nbsp; $4.11  | &nbsp;&nbsp; $4.11  | &nbsp;&nbsp; 16877  | &nbsp;&nbsp; 16877  |
| &nbsp;&nbsp; <br> **Kuroto Fund LP**  | &nbsp;&nbsp; <br> **Kuroto Fund LP**  | &nbsp;&nbsp; <br> **Kuroto Fund LP**  | &nbsp;&nbsp; <br> **Kuroto Fund LP**  | &nbsp;&nbsp; <br> **Kuroto Fund LP**  | &nbsp;&nbsp; <br> **Kuroto Fund LP**  | &nbsp;&nbsp; <br> **Kuroto Fund LP**  | &nbsp;&nbsp; <br> **Kuroto Fund LP**  | &nbsp;&nbsp; <br> **Kuroto Fund LP**  |
| &nbsp;&nbsp; 11/04/2025  | &nbsp;&nbsp; 11/04/2025  | &nbsp;&nbsp; BUY  | &nbsp;&nbsp; Common Stock  | &nbsp;&nbsp; Common Stock  | &nbsp;&nbsp; $3.79  | &nbsp;&nbsp; $3.79  | &nbsp;&nbsp; 30636  | &nbsp;&nbsp; 30636  |
| &nbsp;&nbsp; 11/05/2025  | &nbsp;&nbsp; 11/05/2025  | &nbsp;&nbsp; BUY  | &nbsp;&nbsp; Common Stock  | &nbsp;&nbsp; Common Stock  | &nbsp;&nbsp; $4.02  | &nbsp;&nbsp; $4.02  | &nbsp;&nbsp; 19092  | &nbsp;&nbsp; 19092  |
| &nbsp;&nbsp; 11/06/2025  | &nbsp;&nbsp; 11/06/2025  | &nbsp;&nbsp; BUY  | &nbsp;&nbsp; Common Stock  | &nbsp;&nbsp; Common Stock  | &nbsp;&nbsp; $4.07  | &nbsp;&nbsp; $4.07  | &nbsp;&nbsp; 22200  | &nbsp;&nbsp; 22200  |
| &nbsp;&nbsp; 11/07/2025  | &nbsp;&nbsp; 11/07/2025  | &nbsp;&nbsp; BUY  | &nbsp;&nbsp; Common Stock  | &nbsp;&nbsp; Common Stock  | &nbsp;&nbsp; $4.11  | &nbsp;&nbsp; $4.11  | &nbsp;&nbsp; 5626  | &nbsp;&nbsp; 5626  |
| &nbsp;&nbsp; <br> **Mason Hill Partners, LP**  | &nbsp;&nbsp; <br> **Mason Hill Partners, LP**  | &nbsp;&nbsp; <br> **Mason Hill Partners, LP**  | &nbsp;&nbsp; <br> **Mason Hill Partners, LP**  | &nbsp;&nbsp; <br> **Mason Hill Partners, LP**  | &nbsp;&nbsp; <br> **Mason Hill Partners, LP**  | &nbsp;&nbsp; <br> **Mason Hill Partners, LP**  | &nbsp;&nbsp; <br> **Mason Hill Partners, LP**  | &nbsp;&nbsp; <br> **Mason Hill Partners, LP**  |
| &nbsp;&nbsp; 11/04/2025  | &nbsp;&nbsp; 11/04/2025  | &nbsp;&nbsp; BUY  | &nbsp;&nbsp; Common Stock  | &nbsp;&nbsp; Common Stock  | &nbsp;&nbsp; $3.79  | &nbsp;&nbsp; $3.79  | &nbsp;&nbsp; 61272  | &nbsp;&nbsp; 61272  |
| &nbsp;&nbsp; 11/05/2025  | &nbsp;&nbsp; 11/05/2025  | &nbsp;&nbsp; BUY  | &nbsp;&nbsp; Common Stock  | &nbsp;&nbsp; Common Stock  | &nbsp;&nbsp; $4.02  | &nbsp;&nbsp; $4.02  | &nbsp;&nbsp; 38184  | &nbsp;&nbsp; 38184  |
| &nbsp;&nbsp; 11/06/2025  | &nbsp;&nbsp; 11/06/2025  | &nbsp;&nbsp; BUY  | &nbsp;&nbsp; Common Stock  | &nbsp;&nbsp; Common Stock  | &nbsp;&nbsp; $4.07  | &nbsp;&nbsp; $4.07  | &nbsp;&nbsp; 44400  | &nbsp;&nbsp; 44400  |
| &nbsp;&nbsp; 11/07/2025  | &nbsp;&nbsp; 11/07/2025  | &nbsp;&nbsp; BUY  | &nbsp;&nbsp; Common Stock  | &nbsp;&nbsp; Common Stock  | &nbsp;&nbsp; $4.11  | &nbsp;&nbsp; $4.11  | &nbsp;&nbsp; 11251  | &nbsp;&nbsp; 11251  |
| &nbsp;&nbsp; <br> **Managed Account**  | &nbsp;&nbsp; <br> **Managed Account**  | &nbsp;&nbsp; <br> **Managed Account**  | &nbsp;&nbsp; <br> **Managed Account**  | &nbsp;&nbsp; <br> **Managed Account**  | &nbsp;&nbsp; <br> **Managed Account**  | &nbsp;&nbsp; <br> **Managed Account**  | &nbsp;&nbsp; <br> **Managed Account**  | &nbsp;&nbsp; <br> **Managed Account**  |
| &nbsp;&nbsp; 11/04/2025  | &nbsp;&nbsp; 11/04/2025  | &nbsp;&nbsp; BUY  | &nbsp;&nbsp; Common Stock  | &nbsp;&nbsp; Common Stock  | &nbsp;&nbsp; $3.79  | &nbsp;&nbsp; $3.79  | &nbsp;&nbsp; 92184  | &nbsp;&nbsp; 92184  |
| &nbsp;&nbsp; 11/05/2025  | &nbsp;&nbsp; 11/05/2025  | &nbsp;&nbsp; BUY  | &nbsp;&nbsp; Common Stock  | &nbsp;&nbsp; Common Stock  | &nbsp;&nbsp; $4.02  | &nbsp;&nbsp; $4.02  | &nbsp;&nbsp; 57448  | &nbsp;&nbsp; 57448  |
| &nbsp;&nbsp; 11/06/2025  | &nbsp;&nbsp; 11/06/2025  | &nbsp;&nbsp; BUY  | &nbsp;&nbsp; Common Stock  | &nbsp;&nbsp; Common Stock  | &nbsp;&nbsp; $4.07  | &nbsp;&nbsp; $4.07  | &nbsp;&nbsp; 66800  | &nbsp;&nbsp; 66800  |
| &nbsp;&nbsp; 11/07/2025  | &nbsp;&nbsp; 11/07/2025  | &nbsp;&nbsp; BUY  | &nbsp;&nbsp; Common Stock  | &nbsp;&nbsp; Common Stock  | &nbsp;&nbsp; $4.11  | &nbsp;&nbsp; $4.11  | &nbsp;&nbsp; 16928  | &nbsp;&nbsp; 16928  |

---

&nbsp;&nbsp;&nbsp;&nbsp; <sup>1</sup> The above purchases were executed by a broker-dealer in multiple open market purchase transactions on the indicated date. The reported price is the approximate weighted average purchase price per share on the indicated date. The range of prices for each such date's transactions are:

11/04/2025 - Range: $3.59 - $3.89

11/05/2025 – Range: $3.81 - $4.08

11/06/2025 – Range: $3.96 - $4.15

11/07/2025 – Range: $4.08 - $4.20

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

## SCHEDULE 13D

### Under the Securities Exchange Act of 1934

**(Amendment No. 1)**

**Gran Tierra Energy Inc.**

*(Name of Issuer)*

**Common Stock, par value $0.001 per share**

*(Title of Class of Securities)*

**38500T200**

*(CUSIP Number)*

**Eric Wagner**<br>Kleinberg, Kaplan, Wolff & Cohen P.C.<br>500 Fifth Avenue<br>New York NY 10110<br>(212) 880-9845

*(Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications)*

**11/04/2025**

*(Date of Event Which Requires Filing of this Statement)*

| **CUSIP No.** | **38500T200** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**Equinox Partners Investment Management LLC** | Name of reporting person<br>**Equinox Partners Investment Management LLC** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**OO** | Source of funds (See Instructions)<br>**OO** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | |
| 6 | Citizenship or place of organization<br>**DELAWARE** | Citizenship or place of organization<br>**DELAWARE** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**5796370.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**5796370.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**5796370.00** | Aggregate amount beneficially owned by each reporting person<br>**5796370.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | |
| 13 | Percent of class represented by amount in Row (11)<br>**16.4%** | Percent of class represented by amount in Row (11)<br>**16.4%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**IA** | Type of Reporting Person (See Instructions)<br>**IA** | |

---

**Comment for Reporting Person:** Note to Row 8: Includes 2,284,787 shares of Common Stock, par value $0.001 per share (the "Shares") of Gran Tierra Energy Inc. (the "Issuer") held in one or more client accounts over which Equinox Partners Investment Management LLC, as investment advisor, has shared voting and dispositive power. The filing of this statement should not be deemed as admission that Equinox Partners Investment Management LLC is, for the purposes of Section 13 of the Act, the beneficial owner of the Shares held in such client account(s).

| **CUSIP No.** | **38500T200** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**Equinox Partners, L.P.** | Name of reporting person<br>**Equinox Partners, L.P.** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**WC** | Source of funds (See Instructions)<br>**WC** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | |
| 6 | Citizenship or place of organization<br>**DELAWARE** | Citizenship or place of organization<br>**DELAWARE** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**2396343.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**2396343.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**2396343.00** | Aggregate amount beneficially owned by each reporting person<br>**2396343.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | |
| 13 | Percent of class represented by amount in Row (11)<br>**6.8%** | Percent of class represented by amount in Row (11)<br>**6.8%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**PN** | Type of Reporting Person (See Instructions)<br>**PN** | |

---

| **CUSIP No.** | **38500T200** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**Kuroto Fund LP** | Name of reporting person<br>**Kuroto Fund LP** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**WC** | Source of funds (See Instructions)<br>**WC** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | |
| 6 | Citizenship or place of organization<br>**DELAWARE** | Citizenship or place of organization<br>**DELAWARE** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**616254.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**616254.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**616254.00** | Aggregate amount beneficially owned by each reporting person<br>**616254.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | |
| 13 | Percent of class represented by amount in Row (11)<br>**1.8%** | Percent of class represented by amount in Row (11)<br>**1.8%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**PN** | Type of Reporting Person (See Instructions)<br>**PN** | |

---

| **CUSIP No.** | **38500T200** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**Mason Hill Partners, LP** | Name of reporting person<br>**Mason Hill Partners, LP** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**WC** | Source of funds (See Instructions)<br>**WC** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | |
| 6 | Citizenship or place of organization<br>**DELAWARE** | Citizenship or place of organization<br>**DELAWARE** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**498986.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**498986.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**498986.00** | Aggregate amount beneficially owned by each reporting person<br>**498986.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | |
| 13 | Percent of class represented by amount in Row (11)<br>**1.4%** | Percent of class represented by amount in Row (11)<br>**1.4%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**PN** | Type of Reporting Person (See Instructions)<br>**PN** | |

---

| **CUSIP No.** | **38500T200** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**Sean M. Fieler** | Name of reporting person<br>**Sean M. Fieler** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**OO** | Source of funds (See Instructions)<br>**OO** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | |
| 6 | Citizenship or place of organization<br>**X1** | Citizenship or place of organization<br>**X1** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**5796370.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**5796370.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**5796370.00** | Aggregate amount beneficially owned by each reporting person<br>**5796370.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | |
| 13 | Percent of class represented by amount in Row (11)<br>**16.4%** | Percent of class represented by amount in Row (11)<br>**16.4%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**IN** | Type of Reporting Person (See Instructions)<br>**IN** | |

---

**Comment for Reporting Person:** Note to Row 8:  See Footnote 1 on page 2. The filing of this statement should not be deemed an admission that Mr. Fieler is, for the purposes of Section 13 of the Act, the beneficial owner of the Shares held in such client account(s).

**Item 1. Security and Issuer**

**(a) Title of Class of Securities:**
Common Stock, par value $0.001 per share

**(b) Name of Issuer:**
Gran Tierra Energy Inc.

**(c) Address of Issuer's Principal Executive Offices:**
500 Centre Street S.E., Calgary, A0, T2G 1A6

The following constitutes Amendment No. 1 (this "Amendment No. 1") to the Schedule 13D (the "Schedule 13D") filed by the undersigned with respect to shares of the Common Stock, par value $0.001 per share (the "Shares") of Gran Tierra Energy Inc. (the "Issuer"). This Amendment No. 1 amends the Schedule 13D as specifically set forth herein.

**Item 5. Interest in Securities of the Issuer**

**(a)**
Item 5 of the Schedule 13D is hereby amended and restated in its entirety as follows:

(a)-(b)	The aggregate percentage of Shares reported owned by the Reporting Persons is based upon  35,295,753 Shares outstanding, which is the total number of Shares outstanding as reported in the Issuer's Quarterly Report on Form 10-Q filed with the Securities and Exchange Commission on October 31, 2025.

As of the date hereof, the Reporting Persons beneficially own an aggregate of 5,796,370 Shares, constituting approximately 16.4% of the outstanding Shares. See rows (11) and (13) of the cover pages to this Schedule 13D for the aggregate number of Shares and percentage of the outstanding Shares beneficially owned by each of the Reporting Persons. See rows (7) through (10) of the cover pages to this Schedule 13D, including the notes relating thereto, for the number of Shares as to which each Reporting Person has the sole or shared power to vote or direct the vote and the sole or shared power to dispose or to direct the disposition.

The filing of this Schedule 13D shall not be deemed an admission that the Reporting Persons are, for purposes of Section 13(d) of the Securities Exchange Act of 1934, as amended, the beneficial owners of any securities of the Issuer that he or it does not directly own. Each of the Reporting Persons specifically disclaims beneficial ownership of the securities reported herein that he or it does not directly own.

The Reporting Persons expect that Brad Virbitsky, a portfolio manager and partner at EPIM who was appointed to the Issuer's Board of Directors as an independent director effective September 30, 2025, will be awarded certain securities of the Issuer as compensation for his serving as a member of the Issuer's Board of Directors.

**(b)**
See Item 5(a).

**(c)**
During the past sixty (60) days, the Reporting Persons have not entered into any transactions in the Shares except as set forth on Schedule 1 hereto.

### SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

**Reporting Person:** Equinox Partners Investment Management LLC

**Signature:** /s/ Sean M. Fieler

**Name/Title:** Manager

**Date:** 11/07/2025

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

**Reporting Person:** Equinox Partners, L.P.

**Signature:** /s/ Sean M. Fieler

**Name/Title:** Manager of Equinox Partners Investment Management LLC, the Investment Manager of Equinox Partners, L.P.

**Date:** 11/07/2025

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

**Reporting Person:** Kuroto Fund LP

**Signature:** /s/ Sean M. Fieler

**Name/Title:** Manager of Equinox Partners Investment Management LLC, the Investment Manager of Kuroto Fund LP

**Date:** 11/07/2025

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

**Reporting Person:** Mason Hill Partners, LP

**Signature:** /s/ Sean M. Fieler

**Name/Title:** Manager of Equinox Partners Investment Management LLC, the Investment Manager of Mason Hill Partners, LP

**Date:** 11/07/2025

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

**Reporting Person:** Sean M. Fieler

**Signature:** /s/ Sean M. Fieler

**Name/Title:** Sean M. Fieler

**Date:** 11/07/2025