Perimeter Acquisition Corp I received an updated ownership filing from a group of Harraden Circle investment entities and Frederick V. Fortmiller, Jr. They report beneficial ownership of 2,300,498 shares of Class A common stock, representing 9.28% of the class as of the event date.
All reported shares carry shared voting and dispositive power, with no sole voting or dispositive authority. The position is held across several Delaware limited partnerships, including Harraden Circle Investors, Special Opportunities, Strategic Investments, and Concentrated funds, with Mr. Fortmiller as managing member of key general partners and the adviser.
The filers certify the shares were not acquired and are not held for the purpose or effect of changing or influencing control of Perimeter Acquisition Corp I, and are instead reported on a passive basis under Schedule 13G/A.
Positive
None.
Negative
None.
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
SCHEDULE 13G
UNDER THE SECURITIES EXCHANGE ACT OF 1934
(Amendment No. 2)
Perimeter Acquisition Corp I
(Name of Issuer)
Class A Common Stock
(Title of Class of Securities)
G7010A129
(CUSIP Number)
12/31/2025
(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)
SCHEDULE 13G
CUSIP No.
G7010A129
1
Names of Reporting Persons
Harraden Circle Investments, 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
2,300,498.00
7
Sole Dispositive Power
0.00
8
Shared Dispositive Power
2,300,498.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
2,300,498.00
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)
9.28 %
12
Type of Reporting Person (See Instructions)
OO, HC, IA
SCHEDULE 13G
CUSIP No.
G7010A129
1
Names of Reporting Persons
Harraden Circle Investors GP, 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
2,300,498.00
7
Sole Dispositive Power
0.00
8
Shared Dispositive Power
2,300,498.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
2,300,498.00
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)
9.28 %
12
Type of Reporting Person (See Instructions)
PN, HC
SCHEDULE 13G
CUSIP No.
G7010A129
1
Names of Reporting Persons
Harraden Circle Investors GP, 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
2,300,498.00
7
Sole Dispositive Power
0.00
8
Shared Dispositive Power
2,300,498.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
2,300,498.00
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)
9.28 %
12
Type of Reporting Person (See Instructions)
OO, HC
SCHEDULE 13G
CUSIP No.
G7010A129
1
Names of Reporting Persons
Harraden Circle Investors, 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
1,142,231.00
7
Sole Dispositive Power
0.00
8
Shared Dispositive Power
1,142,231.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
1,142,231.00
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)
4.61 %
12
Type of Reporting Person (See Instructions)
PN
SCHEDULE 13G
CUSIP No.
G7010A129
1
Names of Reporting Persons
Harraden Circle Special Opportunities, 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
663,285.00
7
Sole Dispositive Power
0.00
8
Shared Dispositive Power
663,285.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
663,285.00
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)
2.68 %
12
Type of Reporting Person (See Instructions)
PN
SCHEDULE 13G
CUSIP No.
G7010A129
1
Names of Reporting Persons
Harraden Circle Strategic Investments, 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
408,153.00
7
Sole Dispositive Power
0.00
8
Shared Dispositive Power
408,153.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
408,153.00
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)
1.65 %
12
Type of Reporting Person (See Instructions)
PN
SCHEDULE 13G
CUSIP No.
G7010A129
1
Names of Reporting Persons
Harraden Circle Concentrated, 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
86,829.00
7
Sole Dispositive Power
0.00
8
Shared Dispositive Power
86,829.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
86,829.00
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)
0.35 %
12
Type of Reporting Person (See Instructions)
PN
SCHEDULE 13G
CUSIP No.
G7010A129
1
Names of Reporting Persons
Frederick V. Fortmiller, Jr.
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
2,300,498.00
7
Sole Dispositive Power
0.00
8
Shared Dispositive Power
2,300,498.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
2,300,498.00
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)
9.28 %
12
Type of Reporting Person (See Instructions)
IN, 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:
This Statement is filed on behalf of the following persons (collectively, the "Reporting Persons"):
i) Harraden Circle Investments, LLC ("Harraden Adviser");
ii) Harraden Circle Investors GP, LP ("Harraden GP");
iii) Harraden Circle Investors GP, LLC ("Harraden LLC");
iv) Harraden Circle Investors, LP ("Harraden Fund");
v) Harraden Circle Special Opportunities, LP ("Harraden Special Op Fund");
vi) Harraden Circle Strategic Investments, LP ("Harraden Strategic Fund");
vii) Harraden Circle Concentrated, LP ("Harraden Concentrated Fund"); and
viii) Frederick V. Fortmiller, Jr. ("Mr. Fortmiller")
This Statement relates to Shares (as defined herein) directly beneficially owned by Harraden Fund, Harraden Special Op Fund, Harraden Strategic Fund, and Harraden Concentrated Fund. Harraden GP is the general partner to Harraden Fund, Harraden Special Op Fund, Harraden Strategic Fund, and Harraden Concentrated Fund, and Harraden LLC is the general partner of Harraden GP. Harraden Adviser serves as investment manager to Harraden Fund, Harraden Special Op Fund, Harraden Strategic Fund, Harraden Concentrated Fund, and other high net worth individuals. Mr. Fortmiller is the managing member of each of Harraden LLC and Harraden Adviser. In such capacities, each of Harraden GP, Harraden LLC, Harraden Adviser and Mr. Fortmiller may be deemed to indirectly beneficially own the Shares reported herein directly beneficially owned by Harraden Fund, Harraden Special Op Fund, Harraden Strategic Fund, and Harraden Concentrated Fund.
(b)
Address or principal business office or, if none, residence:
885 Third Avenue, Suite 2600B, New York, NY 10022
(c)
Citizenship:
Each of Harraden Fund, Harraden Special Op Fund, Harraden Strategic Fund, Harraden Concentrated Fund, and Harraden GP is a Delaware limited partnership. Each of Harraden LLC and Harraden Adviser is a Delaware limited liability company. Mr. Fortmiller is a citizen of the United States of America.
(d)
Title of class of securities:
Class A Common Stock
(e)
CUSIP No.:
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:
2,300,498
(b)
Percent of class:
9.28 %
(c)
Number of shares as to which the person has:
(i) Sole power to vote or to direct the vote:
0
(ii) Shared power to vote or to direct the vote:
2,300,498
(iii) Sole power to dispose or to direct the disposition of:
0
(iv) Shared power to dispose or to direct the disposition of:
2,300,498
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.
If a parent holding company has filed this schedule, pursuant to Rule 13d-1(b)(ii)(G), so indicate under Item 3(g) and attach an exhibit stating the identity and the Item 3 classification of the relevant subsidiary. If a parent holding company has filed this schedule pursuant to Rule 13d-1(c) or Rule 13d-1(d), attach an exhibit stating the identification of the relevant subsidiary.
See disclosure in Item 2 hereof.
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.
Harraden Circle Investments, LLC
Signature:
/s/ Frederick V. Fortmiller, Jr.
Name/Title:
Frederick V. Fortmiller, Jr., managing member
Date:
02/13/2026
Harraden Circle Investors GP, LP
Signature:
/s/ Frederick V. Fortmiller, Jr.
Name/Title:
Frederick V. Fortmiller, Jr., managing member; Harraden Circle Investors GP, LLC, general partner
Date:
02/13/2026
Harraden Circle Investors GP, LLC
Signature:
/s/ Frederick V. Fortmiller, Jr.
Name/Title:
Frederick V. Fortmiller, Jr., managing member
Date:
02/13/2026
Harraden Circle Investors, LP
Signature:
/s/ Frederick V. Fortmiller, Jr.
Name/Title:
Frederick V. Fortmiller, Jr., managing member; Harraden Circle Investors GP, LLC, general partner; Harraden Circle Investors GP, LP, general partner
Date:
02/13/2026
Harraden Circle Special Opportunities, LP
Signature:
/s/ Frederick V. Fortmiller, Jr.
Name/Title:
Frederick V. Fortmiller, Jr., managing member; Harraden Circle Investors GP, LLC, general partner; Harraden Circle Investors GP, LP, general partner
Date:
02/13/2026
Harraden Circle Strategic Investments, LP
Signature:
/s/ Frederick V. Fortmiller, Jr.
Name/Title:
Frederick V. Fortmiller, Jr., managing member; Harraden Circle Investors GP, LLC, general partner; Harraden Circle Investors GP, LP, general partner
Date:
02/13/2026
Harraden Circle Concentrated, LP
Signature:
/s/ Frederick V. Fortmiller, Jr.
Name/Title:
Frederick V. Fortmiller, Jr., managing member; Harraden Circle Investors GP, LLC, general partner; Harraden Circle Investors GP, LP, general partner
What stake in Perimeter Acquisition Corp I (PMTR) is reported in this Schedule 13G/A?
The filing reports beneficial ownership of 2,300,498 Class A shares, equal to 9.28% of Perimeter Acquisition Corp I’s outstanding Class A common stock. All of these shares are held with shared voting and shared dispositive power by the reporting group.
Who are the reporting persons in the Perimeter Acquisition Corp I (PMTR) Schedule 13G/A?
The reporting persons are Harraden Circle Investments, LLC, several affiliated Harraden Circle funds and general partners, and Frederick V. Fortmiller, Jr.. Mr. Fortmiller is managing member of Harraden Circle Investments and Harraden Circle Investors GP, giving him indirect beneficial ownership of the reported shares.
How is voting and dispositive power over PMTR shares structured in this filing?
The group reports 0 shares with sole voting or dispositive power and 2,300,498 shares with shared voting and shared dispositive power. This means decisions to vote or sell the shares are made collectively through the Harraden entities and associated control structure.
How are the 2,300,498 PMTR shares allocated among the Harraden funds?
The position is spread across several funds: 1,142,231 shares (4.61%) in Harraden Circle Investors, 663,285 shares (2.68%) in Harraden Circle Special Opportunities, 408,153 shares (1.65%) in Harraden Circle Strategic Investments, and 86,829 shares (0.35%) in Harraden Circle Concentrated.
Does the Harraden group intend to influence control of Perimeter Acquisition Corp I (PMTR)?
The certification states the securities were not acquired and are not held for the purpose or effect of changing or influencing control of Perimeter Acquisition Corp I. They are reported on a passive basis consistent with a Schedule 13G/A filing.
What is the event date and security class covered in this PMTR Schedule 13G/A?
The filing relates to Class A Common Stock of Perimeter Acquisition Corp I, with CUSIP G7010A129. The reported event date triggering the filing obligation is December 31, 2025, aligning ownership information to that reference date.
