GeoPark: Fourth Sail group reports 4.18% stake

GeoPark Ltd reports Schedule 13G/A ownership disclosure by Fourth Sail-related parties.

Accepted by SEC EDGAR 03/23/2026 - 12:46 PM EDT Learn about SEC filing dates

Rhea-AI Filing Summary

GeoPark Ltd reports Schedule 13G/A ownership disclosure by Fourth Sail-related parties. The filing states the ownership percentages are based on 64,625,278 Class A Common Shares outstanding. The group reports a 4.18% aggregate stake. Fourth Sail Long Short directly holds 2,411,154 shares and Fourth Sail Discovery directly holds 288,831 shares. The cover rows list shared voting and dispositive power by entity, including Fourth Sail Capital LP: 2,699,985 and Ariel Merenstein: 3,232,585.

Insights

Corporate Governance Analyst

Disclosure clarifies ownership concentration and voting influence among related funds.

The filing lists beneficial ownership based on 64,625,278 Class A Common Shares outstanding and reports a 4.18% position held across Fourth Sail entities. Detailed per-entity voting and dispositive figures are provided, showing shared control rather than sole voting authority.

Implications depend on future filings; subsequent amendments or Form 4s would show active trading or control shifts.

Investor Relations Advisor

Routine passive ownership disclosure, useful for cap table transparency.

The schedule identifies direct holdings for two entities: 2,411,154 and 288,831 Class A shares, and larger shared-power amounts attributed to related entities and the named managing partner. The disclosure frames ownership as shared voting/dispositive power, not sole control.

Holdings represent a minority stake by percentage; cash-flow treatment or sale intent is not included here.

FAQ

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

What stake in GeoPark (GPRK) do Fourth Sail entities report?

They report an aggregate 4.18% stake based on 64,625,278 Class A Common Shares outstanding. The filing attributes that percentage to combined holdings and shared voting/dispositive power among the named entities and individuals.

Which Fourth Sail entities directly hold GeoPark shares?

The filing shows direct holdings of 2,411,154 shares by Fourth Sail Long Short LLC and 288,831 shares by Fourth Sail Discovery LLC. Other entities show shared voting/dispositive power rather than direct sole holdings.

How is voting and dispositive power reported for the group?

Reported figures list shared voting power and shared dispositive power by entity, for example Fourth Sail Capital LP: 2,699,985 and Ariel Merenstein: 3,232,585, indicating collective influence rather than sole control.

Does this filing indicate intent to buy or sell GPRK shares?

No. This Schedule 13G/A discloses beneficial ownership and voting/dispositive power figures; it does not state any purchase or sale intentions, or any cash-flow treatment tied to these positions.

What outstanding share base is used to calculate the percentage?

The ownership percentages are calculated using 64,625,278 Class A Common Shares outstanding, as stated in the disclosure that supports the reported 4.18% figure.

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

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SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 4)

GeoPark Ltd

(Name of Issuer)

Ordinary Shares

(Title of Class of Securities)

(CUSIP Number)

10/13/2025

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

Rule 13d-1(b)

Rule 13d-1(c)

Rule 13d-1(d)

schemaVersion:

SCHEDULE 13G

CUSIP No.

1

Names of Reporting Persons

Fourth Sail Capital LP

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

CAYMAN ISLANDS

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 2,699,985.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 2,699,985.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

0.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

4.18 %

12

Type of Reporting Person (See Instructions)

PN

SCHEDULE 13G

CUSIP No.

1

Names of Reporting Persons

Ariel Merenstein

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

UNITED STATES

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 3,232,585.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 3,232,585.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

0.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

4.18 %

12

Type of Reporting Person (See Instructions)

IN

SCHEDULE 13G

CUSIP No.

1

Names of Reporting Persons

Fourth Sail Capital US LP

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 2,699,985.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 2,699,985.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

0.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

4.18 %

12

Type of Reporting Person (See Instructions)

PN

SCHEDULE 13G

CUSIP No.

1

Names of Reporting Persons

Tordesilhas Capital Gestora De Recursos Ltda.

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

BRAZIL

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 2,699,985.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 2,699,985.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

0.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

4.18 %

12

Type of Reporting Person (See Instructions)

OO

SCHEDULE 13G

CUSIP No.

1

Names of Reporting Persons

Fourth Sail Long Short LLC

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 2,411,154.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 2,411,154.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

0.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

3.73 %

12

Type of Reporting Person (See Instructions)

OO

SCHEDULE 13G

CUSIP No.

1

Names of Reporting Persons

Fourth Sail Discovery LLC

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 288,831.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 288,831.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

0.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

0.45 %

12

Type of Reporting Person (See Instructions)

OO

SCHEDULE 13G

Item 1.
(a)	Name of issuer: GeoPark Ltd
(b)	Address of issuer's principal executive offices: CALLE 94 NO. 11-30 8 PISO, BOGOTA, COLOMBIA 00000
Item 2.
(a)	Name of person filing: Fourth Sail Capital LP Ariel Merenstein Fourth Sail Capital US LP Tordesilhas Capital Gestora De Recursos Ltda. Fourth Sail Long Short LLC Fourth Sail Discovery LLC
(b)	Address or principal business office or, if none, residence: 10 MARKET STREET #754 GRAND CAYMAN, Cayman Islands KY1-9006
(c)	Citizenship: Fourth Sail Capital LP - CAYMAN ISLANDS Ariel Merenstein - UNITED STATES Fourth Sail Capital US LP - DELAWARE Tordesilhas Capital Gestora De Recursos Ltda. - BRAZIL Fourth Sail Long Short LLC - DELAWARE Fourth Sail Discovery LLC - DELAWARE
(d)	Title of class of securities: Ordinary Shares
(e)	CUSIP No.:
Item 3.	If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:
(a)	Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o);
(b)	Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);
(c)	Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c);
(d)	Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);
(e)	An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);
(f)	An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);
(g)	A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);
(h)	A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
(i)	A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);
(j)	A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J). If filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J), please specify the type of institution:
(k)	Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).
Item 4.	Ownership
(a)	Amount beneficially owned: The information required by this item with respect to each Reporting Person is set forth in Rows 5 through 9 and 11 of the cover pages to this Schedule 13G. The ownership percentages reported are based on 64,625,278.00 Class A Common Shares outstanding. As of the date of this Schedule 13G, Fourth Sail Long Short directly holds 2,411,154 Class A Common Shares, Fourth Sail Discovery directly holds 288,831 Class A Common Shares. Fourth Sail Capital LP is the General Partner, Fourth Sail Capital US LP is the Investment Manager of Fourth Sail Long Short. Mr. Merenstein is the managing partner of Fourth Sail Capital.
(b)	Percent of class: 4.18 %
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: Fourth Sail Capital LP - 0 Ariel Merenstein - 0 Fourth Sail Capital US LP - 0 Tordesilhas Capital Gestora De Recursos Ltda. - 0 Fourth Sail Long Short LLC - 0 Fourth Sail Discovery LLC - 0
	(ii) Shared power to vote or to direct the vote: Fourth Sail Capital LP - 2,699,985 Ariel Merenstein - 3,232,585 Fourth Sail Capital US LP - 2,699,985 Tordesilhas Capital Gestora De Recursos Ltda. - 2,699,985 Fourth Sail Long Short LLC - 2,411,154 Fourth Sail Discovery LLC - 288,831
	(iii) Sole power to dispose or to direct the disposition of: Fourth Sail Capital LP - 0 Ariel Merenstein - 0 Fourth Sail Capital US LP - 0 Tordesilhas Capital Gestora De Recursos Ltda. - 0 Fourth Sail Long Short LLC - 0 Fourth Sail Discovery LLC - 0
	(iv) Shared power to dispose or to direct the disposition of: Fourth Sail Capital LP - 2,699,985 Ariel Merenstein - 3,232,585 Fourth Sail Capital US LP - 2,699,985 Tordesilhas Capital Gestora De Recursos Ltda. - 2,699,985 Fourth Sail Long Short LLC - 2,411,154 Fourth Sail Discovery LLC - 288,831
Item 5.	Ownership of 5 Percent or Less of a Class.
	Not Applicable
Item 6.	Ownership of more than 5 Percent on Behalf of Another Person.
	Not Applicable
Item 7.	Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
	Not Applicable
Item 8.	Identification and Classification of Members of the Group.
	Not Applicable
Item 9.	Notice of Dissolution of Group.
	Not Applicable

Item 10.

Certifications:

By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under ?? 240.14a-11.

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.

Fourth Sail Capital LP

Signature:	Thiago Doria
Name/Title:	Authorized Person
Date:	03/23/2026

Ariel Merenstein

Signature:	Thiago Doria
Name/Title:	Attorney in fact
Date:	03/23/2026

Fourth Sail Capital US LP

Signature:	Thiago Doria
Name/Title:	Authorized Person
Date:	03/23/2026

Tordesilhas Capital Gestora De Recursos Ltda.

Signature:	Tathiana Azevedo
Name/Title:	Authorized Person
Date:	03/23/2026

Fourth Sail Long Short LLC

Signature:	Thiago Doria
Name/Title:	Authorized Person
Date:	03/23/2026

Fourth Sail Discovery LLC

Signature:	Thiago Doria
Name/Title:	Authorized Person
Date:	03/23/2026