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Form SCHEDULE 13D/A GRAN TIERRA ENERGY INC. Filed by: Equinox Partners Investment Management LLC

August 7, 2026 5:46 PM





If the filing person has previously filed a statement on Schedule 13G to report the acquisition that is the subject of this Schedule 13D, and is filing this schedule because of §§ 240.13d-1(e), 240.13d-1(f) or 240.13d-1(g), check the following box.

The information required on the remainder of this cover page shall not be deemed to be “filed” for the purpose of Section 18 of the Securities Exchange Act of 1934 (“Act”) or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes).




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SCHEDULE 13D




Comment for Type of Reporting Person:
Note to Row 8: Includes 1,938,294 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).


SCHEDULE 13D






SCHEDULE 13D






SCHEDULE 13D






SCHEDULE 13D




Comment for Type of 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).


SCHEDULE 13D


Equinox Partners Investment Management LLC
Signature:/s/ Sean M. Fieler
Name/Title:Manager
Date:08/07/2026
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:08/07/2026
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:08/07/2026
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:08/07/2026
Sean M. Fieler
Signature:/s/ Sean M. Fieler
Name/Title:SEAN M. FIELER
Date:08/07/2026

ATTACHMENTS / EXHIBITS

EXHIBIT 99.1

Categories

SEC Filings