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Ambac (AMBC) Director Receives 4,126 RSUs with One‑Year Vest

Filing Impact
(Neutral)
Filing Sentiment
(Neutral)
Form Type
4

Rhea-AI Filing Summary

Joan M. Lamm-Tennant, a director of Ambac Financial Group, Inc. (AMBC), was granted 4,126 restricted stock units (RSUs) on 10/01/2025. Each RSU represents a contingent right to one share of the company’s common stock and the grant carries a $0 purchase price. The RSUs vest on 10/01/2026, and vested RSUs will settle into shares when the reporting person resigns or otherwise ceases to be a board member. Following the reported transaction the reporting person beneficially owns 4,126 shares (direct).

Positive

  • 4,126 RSUs granted aligns director interests with shareholders
  • RSUs vest on 10/01/2026, providing a clear, time‑based retention schedule
  • RSUs convert one‑for‑one into common stock at a $0 grant price

Negative

  • None.

Insights

Director received time‑based equity to align with shareholders.

The report shows a 10/01/2025 grant of 4,126 RSUs to Joan M. Lamm-Tennant, classified as direct beneficial ownership of 4,126 shares after the award. The RSUs vest on 10/01/2026, creating a one‑year retention period tied to continued board service.

The settlement condition—vesting shares convert upon resignation or cessation of board service—means realized ownership depends on ongoing service to the board.

Grant is a standard zero‑cost RSU award with one‑year vesting.

The RSUs carry a $0 price and convert one-for-one into common stock, indicating a time‑based equity award rather than a purchase or option exercise. Vesting is scheduled for 10/01/2026, one year after grant, which is a common retention mechanism for non-employee directors.

Insider LAMMTENNANT JOAN M
Role Director
Type Security Shares Price Value
Grant/Award Restricted Stock Units 4,126 $0.00 --
Holdings After Transaction: Restricted Stock Units — 4,126 shares (Direct)
Footnotes (1)
  1. Each restricted stock unit ("RSU") represents a contingent right to receive one share of the common stock of Ambac Financial Group, Inc. (the "Company"). RSU's granted on October 1, 2025 shall vest one year later on October 1, 2026. RSUs that have become vested shall settle and convert into shares of common stock upon the date that the reporting person resigns from, or otherwise ceases to be a member of, the Board of Directors of the Company.
Form 4 Insider Transactions: What Each Field Means →
SEC Form 4
FORM 4 UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940
OMB APPROVAL
OMB Number: 3235-0287
Estimated average burden
hours per response: 0.5
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
1. Name and Address of Reporting Person*
LAMMTENNANT JOAN M
(Last) (First) (Middle)
AMBAC FINANCIAL GROUP, INC.
ONE WORLD TRADE CENTER, 41ST FLOOR
(Street)
NEW YORK NY 10007
(City) (State) (Zip)
2. Issuer Name and Ticker or Trading Symbol
AMBAC FINANCIAL GROUP INC [ AMBC ] 		5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
X Director 10% Owner
Officer (give title below) Other (specify below)
3. Date of Earliest Transaction (Month/Day/Year)
10/01/2025
4. If Amendment, Date of Original Filed (Month/Day/Year)
 6. Individual or Joint/Group Filing (Check Applicable Line)
X Form filed by One Reporting Person
Form filed by More than One Reporting Person
Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4)
Code V Amount (A) or (D) Price
Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year) 3A. Deemed Execution Date, if any (Month/Day/Year) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 6. Date Exercisable and Expiration Date (Month/Day/Year) 7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4)
Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares
Restricted Stock Units (1) 10/01/2025 A 4,126 (2) (2) Common Stock 4,126 $0 4,126 D
Explanation of Responses:
1. Each restricted stock unit ("RSU") represents a contingent right to receive one share of the common stock of Ambac Financial Group, Inc. (the "Company").
2. RSU's granted on October 1, 2025 shall vest one year later on October 1, 2026. RSUs that have become vested shall settle and convert into shares of common stock upon the date that the reporting person resigns from, or otherwise ceases to be a member of, the Board of Directors of the Company.
Remarks:
William J. White, attorney in fact 10/02/2025
** Signature of Reporting Person Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

Source: View Original Filing on SEC EDGAR

FAQ

Who filed the Form 4 for AMBC?

The Form 4 was filed for Joan M. Lamm-Tennant, a director of Ambac Financial Group, Inc. (AMBC).

What security was reported on the AMBC Form 4?

The filing reports 4,126 restricted stock units (RSUs) that convert into common stock of the company.

When were the RSUs granted and when do they vest?

The RSUs were granted on 10/01/2025 and vest on 10/01/2026.

How many shares does the reporting person beneficially own after the transaction?

Following the reported transaction the reporting person beneficially owns 4,126 shares (direct).

Under what condition do vested RSUs convert into shares?

Vested RSUs settle and convert into shares upon the reporting person’s resignation or otherwise ceasing to be a member of the Board of Directors.