Frontier Capital reports 5.65% FTAI Infrastructure (FIP) ownership in Schedule 13G

Rhea-AI Filing Summary

FTAI Infrastructure Inc. received a Schedule 13G showing that Frontier Capital Management Co., LLC, a Delaware entity, holds a significant passive stake in its common stock. Frontier reports beneficial ownership of 6,576,963 shares, representing 5.65% of the outstanding common stock as of the event date.

The filing states that Frontier has sole voting power over 3,296,991 shares and sole dispositive power over all 6,576,963 shares, with no shared voting or dispositive authority. Frontier certifies that the securities were acquired and are held in the ordinary course of business and not for the purpose of changing or influencing control of FTAI Infrastructure Inc.

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

FTAI Infrastructure Inc.

(Name of Issuer)

Common Stock, par value $0.01 per share

(Title of Class of Securities)

35953C106

(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. 35953C106

1

Names of Reporting Persons

FRONTIER CAPITAL MANAGEMENT CO.,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 3,296,991.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 6,576,963.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

6,576,963.00

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)

5.65 %

12

Type of Reporting Person (See Instructions)

IA

SCHEDULE 13G

Item 1.
(a)	Name of issuer: FTAI Infrastructure Inc.
(b)	Address of issuer's principal executive offices: 1345 Avenue of the Americas, 45th Floor, New York, New York 10105
Item 2.
(a)	Name of person filing: FRONTIER CAPITAL MANAGEMENT CO., LLC
(b)	Address or principal business office or, if none, residence: 99 Summer Street Boston, MA 02110
(c)	Citizenship: Delaware
(d)	Title of class of securities: Common Stock, par value $0.01 per share
(e)	CUSIP No.: 35953C106
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: 6,576,963
(b)	Percent of class: 5.65%
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: 3,296,991
	(ii) Shared power to vote or to direct the vote: 0
	(iii) Sole power to dispose or to direct the disposition of: 6,576,963
	(iv) Shared power to dispose or to direct the disposition of: 0
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.

FRONTIER CAPITAL MANAGEMENT CO.,LLC

Signature:	Robert E. Phay
Name/Title:	Robert E. Phay, Chief Compliance Officer & General Counsel
Date:	02/17/2026

FAQ

What stake does Frontier Capital Management hold in FTAI Infrastructure Inc. (FIP)?

Frontier Capital Management Co., LLC reports beneficial ownership of 6,576,963 shares of FTAI Infrastructure Inc. common stock. This position represents 5.65% of the company’s outstanding common stock as disclosed in the Schedule 13G ownership filing for the 12/31/2025 event date.

Does Frontier Capital Management have voting control over all its FIP shares?

No. Frontier Capital Management reports sole voting power over 3,296,991 shares of FTAI Infrastructure Inc. common stock. It has no shared voting power, meaning a portion of the 6,576,963 beneficially owned shares is held without voting authority attached.

How many FTAI Infrastructure (FIP) shares can Frontier Capital Management sell on its own?

Frontier Capital Management has sole dispositive power over 6,576,963 shares of FTAI Infrastructure Inc. common stock. Sole dispositive power means Frontier alone can decide whether and when to sell or otherwise dispose of these shares, with no shared dispositive authority reported.

Is Frontier Capital Management’s FIP stake considered a passive investment?

Yes. Frontier Capital Management certifies the FTAI Infrastructure Inc. shares were acquired and are held in the ordinary course of business. It further states they were not acquired and are not held for the purpose of changing or influencing the control of the issuer.

What class of FTAI Infrastructure securities does Frontier Capital Management own?

Frontier Capital Management’s position is in FTAI Infrastructure Inc. common stock with a par value of $0.01 per share. The filing identifies the securities by CUSIP 35953C106, confirming the specific equity class covered by this Schedule 13G ownership report.

When did Frontier Capital Management’s FIP ownership trigger this Schedule 13G filing?

The Schedule 13G lists 12/31/2025 as the date of the event requiring the filing. This date reflects when Frontier Capital Management’s beneficial ownership position in FTAI Infrastructure Inc. common stock met the relevant reporting threshold under SEC beneficial ownership rules.