Fort Baker reports 6.3% stake in Perimeter Acquisition

Perimeter Acquisition Corp. I reports a Schedule 13G filing disclosing beneficial ownership of 1,573,684 Class A ordinary shares by Fort Baker Capital Management entities and Steven Patrick Pigott.

Rhea-AI Filing Summary

Perimeter Acquisition Corp. I reports a Schedule 13G filing disclosing beneficial ownership of 1,573,684 Class A ordinary shares by Fort Baker Capital Management entities and Steven Patrick Pigott.

The filing states these shares represent 6.3% of the Class A outstanding, based on 24,788,000 shares outstanding as of March 30, 2026. The reporting persons state shared voting and dispositive power over the 1,573,684 shares through Fort Baker Capital Management LP and Fort Baker Capital, LLC.

Insights

Institutional Ownership Analyst

Large passive ownership stake disclosed: Fort Baker holds 6.3% (1,573,684 shares).

The filing lists Fort Baker Capital Management LP, Fort Baker Capital, LLC, and Steven Patrick Pigott as reporting persons with shared voting and dispositive power over 1,573,684 shares. The percentage calculation uses 24,788,000 shares outstanding as of March 30, 2026.

Holder structure shows indirect control via a general partner and an LP; subsequent Form 13 filings or Form 4s would clarify any active trading. Future filings may detail changes in ownership or voting arrangements.

Corporate Governance Specialist

Disclosure clarifies voting/dispositive power and disclaimers of group status.

The report states each reporting person "disclaims membership in a group" and disclaims beneficial ownership except to the extent of pecuniary interest. Shared voting/dispositive power is explicitly recorded as 1,573,684 shares.

This filing is informational under Section 13; monitor periodic reports for any shifts that could affect governance or proxy matters.

Key Figures

Shares beneficially owned: 1,573,684 shares Percent of class: 6.3% Shares outstanding: 24,788,000 shares +2 more

5 metrics

Shares beneficially owned 1,573,684 shares reported by Fort Baker entities

Percent of class 6.3% of Class A ordinary shares

Shares outstanding 24,788,000 shares as of March 30, 2026

Securities class Class A Ordinary Shares Par value $0.0001

CUSIP G7010A129 Class A Ordinary Shares CUSIP

Key Terms

Schedule 13G, Beneficial ownership, Shared dispositive power, Disclaims membership in a group

4 terms

Schedule 13G regulatory

"Item 1. (a) Name of issuer: Perimeter Acquisition Corp. I"

A Schedule 13G is a formal document that investors file with the government when they acquire a large ownership stake in a company, usually for investment purposes rather than control. It helps keep the public informed about who owns significant parts of a company's shares, which can influence how the company is managed and how investors make decisions. Filing this schedule is important for transparency and understanding the ownership landscape of publicly traded companies.

Beneficial ownership financial

"Item 4. (a) Amount beneficially owned: Reference is hereby made to Items 5-9"

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.

Shared dispositive power regulatory

"Shared power to dispose or to direct the disposition of: 1,573,684"

Disclaims membership in a group regulatory

"The Reporting Persons are filing this jointly, but not as members of a group"

FAQ

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

What stake does Fort Baker report in PMTR?

Fort Baker reports beneficial ownership of 1,573,684 shares, equal to 6.3% of Class A ordinary shares based on 24,788,000 shares outstanding as of March 30, 2026. The ownership is held with shared voting and dispositive power.

Who are the reporting persons on the Schedule 13G for PMTR?

The reporting persons are Fort Baker Capital Management LP, Fort Baker Capital, LLC, and Steven Patrick Pigott. Pigott is identified as Chief Investment Officer and the signatures are dated 05/15/2026.

How was the 6.3% ownership percentage calculated?

The percentage was derived from the issuer’s Form 10-K which stated 24,788,000 Class A shares outstanding as of March 30, 2026; dividing 1,573,684 by that outstanding share count yields the reported 6.3%.

Does the filing indicate sole control of the shares?

No. The filing shows 0 sole voting power and 0 sole dispositive power for each reporting person, with 1,573,684 shares listed as shared voting and shared dispositive power.

Does the Schedule 13G state the reporting persons form a group?

The filing explicitly states the reporting persons are filing jointly but "not as members of a group" and each disclaims membership in a group, per the disclosure language in Item 4.

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

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Accepted by SEC EDGAR 05/15/2026 - 02:22 PM Learn about SEC filing dates

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

Perimeter Acquisition Corp. I

(Name of Issuer)

Class A Ordinary Shares, $0.0001 par value

(Title of Class of Securities)

G7010A129

(CUSIP Number)

03/31/2026

(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 Number(s): G7010A129

1

Names of Reporting Persons

Fort Baker Capital Management 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 1,573,684.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 1,573,684.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

1,573,684.00

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)

6.3 %

12

Type of Reporting Person (See Instructions)

IA

SCHEDULE 13G

CUSIP Number(s): G7010A129

1

Names of Reporting Persons

Steven Patrick Pigott

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 1,573,684.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 1,573,684.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

1,573,684.00

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)

6.3 %

12

Type of Reporting Person (See Instructions)

IN

SCHEDULE 13G

CUSIP Number(s): G7010A129

1

Names of Reporting Persons

Fort Baker Capital, 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 1,573,684.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 1,573,684.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

1,573,684.00

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)

6.3 %

12

Type of Reporting Person (See Instructions)

HC

SCHEDULE 13G

Item 1.
(a)	Name of issuer: Perimeter Acquisition Corp. I
(b)	Address of issuer's principal executive offices: 4514 Cole Avenue, Suite 1600, DALLAS, TEXAS, 75204.
Item 2.
(a)	Name of person filing: Fort Baker Capital Management LP Steven Patrick Pigott Fort Baker Capital, LLC
(b)	Address or principal business office or, if none, residence: The principal business address of each reporting person is 700 Larkspur Landing Circle, Suite 275, Larkspur, CA 94939.
(c)	Citizenship: Fort Baker Capital Management LP: Delaware Limited Partnership Steven Patrick Pigott: Citizen of the United States Fort Baker Capital, LLC: Delaware Limited Liability Company
(d)	Title of class of securities: Class A Ordinary Shares, $0.0001 par value
(e)	CUSIP Number(s): G7010A129
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: Reference is hereby made to Items 5-9 of this Schedule, which Items are incorporated by reference herein. Fort Baker Capital Management LP directly holds 1,573,684 Class A ordinary shares. Steven Patrick Pigott acts as Limited Partner/Chief Investment Officer for Fort Baker Capital Management LP. Fort Baker Capital, LLC acts as General Partner for Fort Baker Capital Management LP. The Reporting Persons are filing this Schedule 13G jointly, but not as members of a group, and each disclaims membership in a group. Each also disclaims beneficial ownership of the securities reported herein except to the extent of that person's pecuniary interest therein. The calculation of percentage of beneficial ownership in Item 11 was derived from the Issuer's annual report on Form 10-K filed with the Securities and Exchange Commission on March 30, 2026, in which the Issuer stated that the number of Class A ordinary shares outstanding was 24,788,000 as of March 30, 2026.
(b)	Percent of class: Fort Baker Capital Management LP: 6.3% Steven Patrick Pigott: 6.3% Fort Baker Capital, LLC: 6.3%
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: Fort Baker Capital Management LP: 0 Steven Patrick Pigott: 0 Fort Baker Capital, LLC: 0
	(ii) Shared power to vote or to direct the vote: Fort Baker Capital Management LP: 1,573,684 Steven Patrick Pigott: 1,573,684 Fort Baker Capital, LLC: 1,573,684
	(iii) Sole power to dispose or to direct the disposition of: Fort Baker Capital Management LP: 0 Steven Patrick Pigott: 0 Fort Baker Capital, LLC: 0
	(iv) Shared power to dispose or to direct the disposition of: Fort Baker Capital Management LP: 1,573,684 Steven Patrick Pigott: 1,573,684 Fort Baker Capital, LLC: 1,573,684
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 acquired and are held in the ordinary course of business and 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.

Fort Baker Capital Management LP

Signature:	/s/ Steven Patrick Pigott
Name/Title:	Steven Patrick Pigott, Chief Investment Officer
Date:	05/15/2026

Steven Patrick Pigott

Signature:	/s/ Steven Patrick Pigott
Name/Title:	Steven Patrick Pigott
Date:	05/15/2026

Fort Baker Capital, LLC

Signature:	/s/ Steven Patrick Pigott
Name/Title:	Steven Patrick Pigott, Chief Investment Officer
Date:	05/15/2026