Joan M. Lammtennant - Sep 29, 2025 Form 4 Insider Report for AMBAC FINANCIAL GROUP INC (AMBC)

Role
Director
Signature
William J. White, attorney in fact
Stock symbol
AMBC
Transactions as of
Sep 29, 2025
Transactions value $
$0
Form type
4
Date filed
9/30/2025, 04:34 PM
Previous filing
Jul 1, 2025
Next filing
Oct 2, 2025
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
LAMMTENNANT JOAN M Director AMBAC FINANCIAL GROUP, INC., ONE WORLD TRADE CENTER, 41ST FLOOR, NEW YORK William J. White, attorney in fact 2025-09-30 0001208239

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction AMBC Common Stock, par value $0.01 per share Conversion of derivative security $0 +107K $0.00 107K Sep 29, 2025 Direct F1

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Underlying Class Amount Exercise Price Ownership Footnotes
transaction AMBC Restricted Stock Units Conversion of derivative security $0 -107K -100% $0.00 0 Sep 29, 2025 Common Stock 107K Direct F1, F2
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 Upon the closing of the sale of Ambac Assurance Corporation to an entity owned by funds managed by Oaktree Capital Management, L.P., a change of control was triggered causing the Director's Restricted Stock Units to vest and settle.
F2 Each restricted stock unit ("RSU") represents a contingent right to receive one share of the common stock of Ambac Financial Group, Inc. (the "Company").