Equinox-linked funds sell 413,887 Gran Tierra shares

Equinox Partners Investment Management LLC and related funds reported sales of Gran Tierra Energy Inc. common shares.

Rhea-AI Filing Summary

Equinox Partners Investment Management LLC and related funds reported sales of Gran Tierra Energy Inc. common shares. On August 11 and 12, 2026, entities including Equinox Partners, L.P., Kuroto Fund LP, Mason Hill Partners, LP, and managed accounts indirectly sold an aggregate of 413,887 common shares of Gran Tierra Energy at per-share prices of $9.30 and $9.49. The shares were held by these funds and accounts, and the reporting persons disclaim beneficial ownership beyond their pecuniary interests.

Insider Trade Summary

Net Seller: 413,887 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 413,887 shs ($3.88M)

Type	Security	Shares	Price	Value
Sale	Common Shares, par value $0.001 per share F1, F2	66,974	$9.49	$636K
Sale	Common Shares, par value $0.001 per share F1	67,036	$9.49	$636K
Sale	Common Shares, par value $0.001 per share F1, F2	17,105	$9.49	$162K
Sale	Common Shares, par value $0.001 per share F1, F2	14,262	$9.49	$135K
Sale	Common Shares, par value $0.001 per share F1, F2	100,641	$9.30	$936K
Sale	Common Shares, par value $0.001 per share F1	100,734	$9.30	$937K
Sale	Common Shares, par value $0.001 per share F1, F2	25,703	$9.30	$239K
Sale	Common Shares, par value $0.001 per share F1, F2	21,432	$9.30	$199K

Holdings After Transaction: Common Shares, par value $0.001 per share — 1,680,415 shares (Indirect, By Equinox Partners, L.P.); Common Shares, par value $0.001 per share — 1,682,136 shares (Indirect, By Managed Account); Common Shares, par value $0.001 per share — 429,147 shares (Indirect, By Kuroto Fund LP); Common Shares, par value $0.001 per share — 357,833 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: 413,887 shares Sale price 11 Aug 2026: $9.30 per share Sale price 12 Aug 2026: $9.49 per share +3 more

6 metrics

Total shares sold 413,887 shares Aggregate non-derivative sales reported across eight transactions

Sale price 11 Aug 2026 $9.30 per share Price for multiple common share sales on 2026-08-11

Sale price 12 Aug 2026 $9.49 per share Price for multiple common share sales on 2026-08-12

Number of sale transactions 8 transactions Non-derivative code S sales of common shares

Largest single sale block 100,734 shares Indirectly held by Managed Account, sold at $9.30 per share

Second-largest sale block 100,641 shares Indirectly held by Equinox Partners, L.P., sold at $9.30 per share

Key Terms

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

5 terms

ten percent owner regulatory

"each reporting person is indicated as a ten percent owner of the issuer"

beneficial ownership regulatory

"disclaims beneficial ownership of the securities reported herein except to the extent"

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 of the securities reported herein except to the extent of his or its pecuniary interest"

indirect ownership financial

"ownership type for these sales is reported as indirect, held by funds or managed accounts"

Section 13(d) of the Securities Exchange Act of 1934 regulatory

"for purposes of Section 13(d) of the Securities Exchange Act of 1934, as amended"

Section 13(d) of the Securities Exchange Act of 1934 is a U.S. rule that requires anyone who buys more than 5% of a public company’s shares to publicly disclose who they are, how many shares they own, and their intentions toward the company. For investors, this is like a neighborhood alert when someone acquires a large stake in a building: it reveals potential changes in control or strategy that could affect the stock’s price, governance, or future direction.

FAQ

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

What insider activity did GTE report in this Form 4?

Gran Tierra Energy Inc. reported that entities associated with Equinox Partners sold 413,887 common shares in open market or private transactions at $9.30 and $9.49 per share on August 11–12, 2026.

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

The Form 4 lists Equinox Partners Investment Management LLC, Equinox Partners, L.P., Kuroto Fund LP, and Mason Hill Partners, LP as reporting persons, collectively referred to as the “Reporting Persons” and identified as ten percent owners of Gran Tierra Energy Inc.

How many GTE shares were sold on August 11, 2026?

On August 11, 2026, entities including Equinox Partners, L.P., a managed account, Kuroto Fund LP, and Mason Hill Partners, LP reported multiple sales of Gran Tierra Energy common shares at $9.30 per share, contributing to the overall 413,887-share disposition.

At what prices were GTE shares sold in this insider transaction?

Reported sales of Gran Tierra Energy common shares occurred at $9.30 per share on August 11, 2026 and at $9.49 per share on August 12, 2026, in open market or private transactions by funds and accounts associated with Equinox Partners.

Were the GTE insider sales in this filing made under a Rule 10b5-1 plan?

The Rule 10b5-1 checkbox in the Form 4 is marked false, and the footnotes do not indicate that these Gran Tierra Energy share sales were executed under a Rule 10b5-1 trading plan or similar pre-arranged program.

Do the reporting persons claim full beneficial ownership of the GTE shares sold?

No. The filing states that the reporting persons disclaim beneficial ownership of the reported Gran Tierra Energy securities except to the extent of their pecuniary interest and clarify that certain securities are owned directly by the funds and accounts.

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

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Accepted by SEC EDGAR 08/13/2026 - 06:23 PM EDT 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

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)
08/11/2026

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	08/11/2026		S		100,641	D	$9.3	1,747,389	I(1)(2)	By Equinox Partners, L.P.
Common Shares, par value $0.001 per share	08/11/2026		S		100,734	D	$9.3	1,749,172	I(1)	By Managed Account
Common Shares, par value $0.001 per share	08/11/2026		S		25,703	D	$9.3	446,252	I(1)(2)	By Kuroto Fund LP
Common Shares, par value $0.001 per share	08/11/2026		S		21,432	D	$9.3	372,095	I(1)(2)	By Mason Hill Partners, LP
Common Shares, par value $0.001 per share	08/12/2026		S		66,974	D	$9.49	1,680,415	I(1)(2)	By Equinox Partners, L.P.
Common Shares, par value $0.001 per share	08/12/2026		S		67,036	D	$9.49	1,682,136	I(1)	By Managed Account
Common Shares, par value $0.001 per share	08/12/2026		S		17,105	D	$9.49	429,147	I(1)(2)	By Kuroto Fund LP
Common Shares, par value $0.001 per share	08/12/2026		S		14,262	D	$9.49	357,833	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	08/13/2026
	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.	08/13/2026
	KUROTO FUND LP By: Sean M. Fieler Title: Manager of Equinox Partners Investment Management LLC, the Investment Manager of Kuroto Fund LP	08/13/2026
	MASON HILL PARTNERS, LP By: Sean M. Fieler Title: Manager of Equinox Partners Investment Management LLC, the Investment Manager of Mason Hill Partners, LP	08/13/2026
	/s/ Sean M. Fieler SEAN M. FIELER	08/13/2026
	** 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)