Gran Tierra (NYSE: GTE) sees Equinox-linked funds sell 674,949 shares

Rhea-AI Filing Summary

For Gran Tierra Energy Inc. (GTE), entities affiliated with Equinox Partners reported a series of open-market sales of common shares. On 2026-08-13 and 2026-08-14, the funds and managed accounts sold an aggregate of 674,949 common shares at prices of $9.23 and $9.31 per share. The positions are reported as indirectly owned through Equinox Partners, L.P., Kuroto Fund LP, Mason Hill Partners, LP, and managed accounts. The reporting persons disclose that they may be deemed to beneficially own the securities through these relationships but disclaim beneficial ownership except to the extent of their pecuniary interest. The Rule 10b5-1 trading-plan checkbox was not marked.

Insider Trade Summary

Net Seller: 674,949 shares

Net Sell 8 txns

Insider Equinox Partners Investment Management LLC, EQUINOX PARTNERS LP, KUROTO FUND LP, MASON HILL PARTNERS LP

Role 10% Owner | 10% Owner | 10% Owner | 10% Owner

Sold 674,949 shs ($6.26M)

Type	Security	Shares	Price	Value
Sale	Common Shares, par value $0.001 per share F1, F2	140,929	$9.31	$1.31M
Sale	Common Shares, par value $0.001 per share F1	141,057	$9.31	$1.31M
Sale	Common Shares, par value $0.001 per share F1, F2	35,993	$9.31	$335K
Sale	Common Shares, par value $0.001 per share F1, F2	30,011	$9.31	$279K
Sale	Common Shares, par value $0.001 per share F1, F2	132,412	$9.23	$1.22M
Sale	Common Shares, par value $0.001 per share F1	132,532	$9.23	$1.22M
Sale	Common Shares, par value $0.001 per share F1, F2	33,818	$9.23	$312K
Sale	Common Shares, par value $0.001 per share F1, F2	28,197	$9.23	$260K

Holdings After Transaction: Common Shares, par value $0.001 per share — 1,407,074 shares (Indirect, By Equinox Partners, L.P.); Common Shares, par value $0.001 per share — 1,408,547 shares (Indirect, By Managed Account); Common Shares, par value $0.001 per share — 359,336 shares (Indirect, By Kuroto Fund LP); Common Shares, par value $0.001 per share — 299,625 shares (Indirect, By Mason Hill Partners, LP)

Footnotes (2)

1. F1. Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein. The filing of this Form 4 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 he or it does not directly own.
2. F2. EPIM is the investment advisor to Equinox Partners, L.P., Kuroto Fund LP, and Mason Hill Partners, LP (collectively, the "Funds"). Mr. Fieler is the president of EPIM. By virtue of these relationships, each of EPIM and Mr. Fieler may be deemed to beneficially own the securities owned directly by the Funds.

Key Figures

Total shares sold: 674,949 shares Per-share sale price on 2026-08-13: $9.23 per share Per-share sale price on 2026-08-14: $9.31 per share +4 more

7 metrics

Total shares sold 674,949 shares Aggregate common shares sold indirectly by reporting persons on 2026-08-13 and 2026-08-14

Per-share sale price on 2026-08-13 $9.23 per share Price for GTE common share sales on 2026-08-13

Per-share sale price on 2026-08-14 $9.31 per share Price for GTE common share sales on 2026-08-14

Shares sold by Equinox Partners, L.P. on 2026-08-14 140,929 shares Indirectly owned GTE common shares sold at $9.31 per share

Shares sold by Managed Account on 2026-08-14 141,057 shares Indirectly owned GTE common shares sold at $9.31 per share

Shares sold by Kuroto Fund LP on 2026-08-13 33,818 shares Indirectly owned GTE common shares sold at $9.23 per share

Shares sold by Mason Hill Partners, LP on 2026-08-13 28,197 shares Indirectly owned GTE common shares sold at $9.23 per share

Key Terms

ten percent owner, indirect ownership, beneficial ownership, pecuniary interest, +1 more

5 terms

ten percent owner regulatory

"Each reporting person is identified as a ten percent owner of the issuer"

indirect ownership financial

"The common shares are reported as indirectly owned through funds and accounts"

beneficial ownership regulatory

"Each of the Reporting Persons disclaims beneficial ownership of the securities"

Beneficial ownership means the person or entity that actually enjoys the benefits of owning shares or other assets — such as receiving dividends, voting rights, or price gains — even if the legal title is held in another name. For investors it matters because knowing who truly controls and profits from a company reveals who can influence decisions, exposes potential conflicts of interest or hidden concentration of power, and affects transparency and risk in the stock.

pecuniary interest financial

"Disclaims beneficial ownership except to the extent of his or its pecuniary interest"

investment advisor financial

"EPIM is the investment advisor to Equinox Partners, L.P., Kuroto Fund LP"

An investment advisor is a person or firm that provides personalized guidance on buying, selling and managing investments and often oversees client portfolios for a fee. For investors this matters because the advisor shapes risk, costs and long-term returns, and is typically required by law to act in the client’s best interests — think of them as a financial coach or GPS that helps navigate choices and avoid costly detours.

FAQ

What insider transaction did Equinox-related entities report for GTE on this Form 4?

Affiliates of Equinox Partners reported sales of 674,949 Gran Tierra Energy (GTE) common shares on 2026-08-13 and 2026-08-14, executed as indirect holdings through funds and managed accounts at prices of $9.23 and $9.31 per share.

At what prices were the GTE shares sold by Equinox-related entities?

The reported GTE share sales were executed at $9.23 per share on 2026-08-13 and $9.31 per share on 2026-08-14. These were open-market or private transactions involving indirect holdings through funds and managed accounts.

How many GTE shares did Equinox-related entities sell in total?

The filing reports aggregate sales of 674,949 Gran Tierra Energy (GTE) common shares across eight transactions. All transactions involve indirect ownership through Equinox Partners, L.P., Kuroto Fund LP, Mason Hill Partners, LP, and managed accounts advised by Equinox Partners Investment Management LLC.

Were the GTE insider sales by Equinox under a Rule 10b5-1 trading plan?

The Rule 10b5-1 checkbox in the filing is not checked, so the transactions are not reported as being made under a Rule 10b5-1 trading plan. No footnote indicates a pre-arranged trading plan for these specific sales.

How are the GTE shares held and reported by Equinox-related entities?

The GTE shares are reported as indirectly owned by funds and managed accounts, including Equinox Partners, L.P., Kuroto Fund LP, and Mason Hill Partners, LP. The reporting persons disclaim beneficial ownership except to the extent of their pecuniary interest in these entities.

Who are the reporting persons in the GTE Form 4 filing?

The reporting persons are Equinox Partners Investment Management LLC, Equinox Partners, L.P., Kuroto Fund LP, and Mason Hill Partners, LP. Equinox Partners Investment Management LLC advises the funds and its president, Sean M. Fieler, may be deemed to beneficially own their securities.

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Form 4 Insider Transactions: What Each Field Means →

Available on EDGAR 08/17/2026 - 04:52 PM Accepted by SEC EDGAR 08/17/2026 - 04:51 PM Learn about SEC filing dates

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

X

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^*

Equinox Partners Investment Management LLC

(Last) (First) (Middle)

THREE STAMFORD PLAZA

301 TRESSER BLVD, 13TH FL.

(Street)

STAMFORD CONNECTICUT 06901

(City) (State) (Zip)

UNITED STATES

(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)

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
08/13/2026

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

	Form filed by One Reporting Person
X	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 Shares, par value $0.001 per share	08/13/2026		S		132,412	D	$9.23	1,548,003	I(1)(2)	By Equinox Partners, L.P.
Common Shares, par value $0.001 per share	08/13/2026		S		132,532	D	$9.23	1,549,604	I(1)	By Managed Account
Common Shares, par value $0.001 per share	08/13/2026		S		33,818	D	$9.23	395,329	I(1)(2)	By Kuroto Fund LP
Common Shares, par value $0.001 per share	08/13/2026		S		28,197	D	$9.23	329,636	I(1)(2)	By Mason Hill Partners, LP
Common Shares, par value $0.001 per share	08/14/2026		S		140,929	D	$9.31	1,407,074	I(1)(2)	By Equinox Partners, L.P.
Common Shares, par value $0.001 per share	08/14/2026		S		141,057	D	$9.31	1,408,547	I(1)	By Managed Account
Common Shares, par value $0.001 per share	08/14/2026		S		35,993	D	$9.31	359,336	I(1)(2)	By Kuroto Fund LP
Common Shares, par value $0.001 per share	08/14/2026		S		30,011	D	$9.31	299,625	I(1)(2)	By Mason Hill Partners, LP

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

1. Name and Address of Reporting Person^*

Equinox Partners Investment Management LLC

(Last) (First) (Middle)

THREE STAMFORD PLAZA

301 TRESSER BLVD, 13TH FL.

(Street)

STAMFORD CONNECTICUT 06901

(City) (State) (Zip)

UNITED STATES

(Country)

Relationship of Reporting Person(s) to Issuer

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

1. Name and Address of Reporting Person^*

EQUINOX PARTNERS LP

(Last) (First) (Middle)

301 TRESSER BLVD.

13TH FLOOR

(Street)

STAMFORD CONNECTICUT 06901

(City) (State) (Zip)

UNITED STATES

(Country)

Relationship of Reporting Person(s) to Issuer

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

1. Name and Address of Reporting Person^*

KUROTO FUND LP

(Last) (First) (Middle)

THREE STAMFORD PLAZA

301 TRESSER BLVD, 13TH FL.

(Street)

STAMFORD CONNECTICUT 06901

(City) (State) (Zip)

UNITED STATES

(Country)

Relationship of Reporting Person(s) to Issuer

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

1. Name and Address of Reporting Person^*

MASON HILL PARTNERS LP

(Last) (First) (Middle)

301 TRESSER BLVD.

13TH FLOOR

(Street)

STAMFORD CONNECTICUT 06901

(City) (State) (Zip)

UNITED STATES

(Country)

Relationship of Reporting Person(s) to Issuer

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

Explanation of Responses:

1. Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein. The filing of this Form 4 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 he or it does not directly own.

2. EPIM is the investment advisor to Equinox Partners, L.P., Kuroto Fund LP, and Mason Hill Partners, LP (collectively, the "Funds"). Mr. Fieler is the president of EPIM. By virtue of these relationships, each of EPIM and Mr. Fieler may be deemed to beneficially own the securities owned directly by the Funds.

Remarks:

This Form 4 is filed jointly by Equinox Partners Investment Management LLC ("EPIM"), Sean M. Fieler, Equinox Partners, L.P., Kuroto Fund LP, and Mason Hill Partners, LP (collectively, the "Reporting Persons").

	EQUINOX PARTNERS INVESTMENT MANAGEMENT LLC By: /s/ Sean M. Fieler Title: Manager	08/17/2026
	EQUINOX PARTNERS, L.P. By: /s/ Sean M. Fieler Title: Manager of Equinox Partners Investment Management LLC, the Investment Manager of Equinox Partners, L.P.	08/17/2026
	KUROTO FUND LP By: Sean M. Fieler Title: Manager of Equinox Partners Investment Management LLC, the Investment Manager of Kuroto Fund LP	08/17/2026
	MASON HILL PARTNERS, LP By: Sean M. Fieler Title: Manager of Equinox Partners Investment Management LLC, the Investment Manager of Mason Hill Partners, LP	08/17/2026
	/s/ Sean M. Fieler SEAN M. FIELER	08/17/2026
	** 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)