BlackRock discloses 7.6% AMBC stake, 3,535,664 shares on 13G/A

BlackRock, Inc. filed Amendment No. 4 to Schedule 13G reporting beneficial ownership of 3,535,664 shares of Ambac Financial Group (AMBC) common stock, representing 7.6% of the class as of the event date 09/30/2025.

Rhea-AI Filing Summary

BlackRock, Inc. filed Amendment No. 4 to Schedule 13G reporting beneficial ownership of 3,535,664 shares of Ambac Financial Group (AMBC) common stock, representing 7.6% of the class as of the event date 09/30/2025.

BlackRock reports sole voting power over 3,456,958 shares and sole dispositive power over 3,535,664 shares, with no shared voting or dispositive power. The filer is classified as a HC (holding company). The certification states the securities were acquired and are held in the ordinary course of business and not for the purpose of changing or influencing control.

FAQ

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

What did BlackRock disclose about AMBC in this Schedule 13G/A?

BlackRock reported beneficial ownership of 3,535,664 AMBC common shares, equal to 7.6% of the class.

What voting and dispositive powers did BlackRock report over AMBC shares?

BlackRock has sole voting power over 3,456,958 shares and sole dispositive power over 3,535,664 shares; no shared powers were reported.

What is the date of the event triggering this filing for AMBC (AMBC)?

The event date is 09/30/2025.

How is BlackRock classified in this ownership filing?

BlackRock is classified as HC (holding company).

Does the filing indicate an intent to influence control of AMBC?

No. The certification states the shares were acquired and are held in the ordinary course, not to change or influence control.

What is the CUSIP for Ambac Financial Group’s common stock?

The CUSIP is 023139884.

Where is Ambac Financial Group’s principal executive office located?

One World Trade Center, New York, NY 10007.

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

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Accepted by SEC EDGAR 10/17/2025 - 06:40 PM EDT Learn about SEC filing dates

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 4)

AMBAC FINANCIAL GROUP INC

(Name of Issuer)

Common Stock

(Title of Class of Securities)

023139884

(CUSIP Number)

09/30/2025

(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. 023139884

1

Names of Reporting Persons

BlackRock, Inc.

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 3,456,958.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 3,535,664.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

3,535,664.00

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)

7.6 %

12

Type of Reporting Person (See Instructions)

HC

SCHEDULE 13G

Item 1.
(a)	Name of issuer: AMBAC FINANCIAL GROUP INC
(b)	Address of issuer's principal executive offices: ONE WORLD TRADE CENTER New York NY 10007
Item 2.
(a)	Name of person filing: BlackRock, Inc. In accordance with SEC Release No. 34-39538 (January 12, 1998), this Schedule 13G reflects the securities beneficially owned, or deemed to be beneficially owned, by certain business units (collectively, the "Reporting Business Units") of BlackRock, Inc. and its subsidiaries and affiliates. It does not include securities, if any, beneficially owned by other business units whose beneficial ownership of securities are disaggregated from that of the Reporting Business Units in accordance with such release.
(b)	Address or principal business office or, if none, residence: BlackRock, Inc., 50 Hudson Yards New York, NY 10001
(c)	Citizenship: See Item 4 of Cover Page
(d)	Title of class of securities: Common Stock
(e)	CUSIP No.: 023139884
Item 4.	Ownership
(a)	Amount beneficially owned: 3535664
(b)	Percent of class: 7.6 %
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: 3456958
	(ii) Shared power to vote or to direct the vote: 0
	(iii) Sole power to dispose or to direct the disposition of: 3535664
	(iv) Shared power to dispose or to direct the disposition of: 0
Item 5.	Ownership of 5 Percent or Less of a Class.
Item 6.	Ownership of more than 5 Percent on Behalf of Another Person.
	If any other person is known to have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, such securities, a statement to that effect should be included in response to this item and, if such interest relates to more than 5 percent of the class, such person should be identified. A listing of the shareholders of an investment company registered under the Investment Company Act of 1940 or the beneficiaries of employee benefit plan, pension fund or endowment fund is not required. Various persons have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of the common stock of AMBAC FINANCIAL GROUP INC. No one person's interest in the common stock of AMBAC FINANCIAL GROUP INC is more than five percent of the total outstanding common shares.
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 Exhibit 99
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.

BlackRock, Inc.

Signature:	Spencer Fleming
Name/Title:	Managing Director
Date:	10/17/2025

Exhibit Information

Exhibit 24: Power of Attorney Exhibit 99: Item 7