XML 46 R33.htm IDEA: XBRL DOCUMENT
v3.25.3

Net Income Per Share (Tables) | 9 Months Ended
--- | ---
Sep. 30, 2025
Earnings Per Share [Abstract] |
Reconciliation of Common Shares Used for Basic and Diluted Earnings Per Share | The following table provides a reconciliation of the weighted average shares denominator used for basic net income per share to the denominator used for diluted net income per share:
|  | Three Months Ended September 30, |  | Nine Months Ended September 30,
|  | 2025 |  | 2024 |  | 2025 |  | 2024
Basic WASO denominator |  | 48,106,069 |  |  | 47,688,986 |  |  | 47,862,071 |  |  | 46,580,518 |
Effect of potential dilutive shares : |  |  |  |  |  |  |  |
Restricted stock units |  | — |  |  | — |  |  | — |  |  | — |
Performance stock units (1) |  | — |  |  | — |  |  | — |  |  | — |
Diluted WASO denominator |  | 48,106,069 |  |  | 47,688,986 |  |  | 47,862,071 |  |  | 46,580,518 |
Anti-dilutive shares excluded from the above reconciliation: |  |  |  |  |  |  |  |
Warrants |  | — |  |  | — |  |  | — |  |  | — |
Restricted stock units |  | 170,982 |  |  | 470,482 |  |  | 183,058 |  |  | 480,944 |
Performance stock units (1) |  | — |  |  | 515,035 |  |  | — |  |  | 515,238 |
(1) Performance stock units are reflected based on the performance metrics through the balance sheet date. Vesting of these units is contingent upon meeting certain performance metrics. Although a portion of these performance metrics have been achieved as of the respective period end, it is possible that awards may no longer meet the metric at the end of the performance period.
Schedule of Earnings Per Share, Basic and Diluted | The following table provides a reconciliation of net income attributable to common stockholders to the numerator in the basic and diluted earnings per share calculation, together with the resulting earnings per share amounts:
|  | Three Months Ended September 30, |  | Nine Months Ended September 30,
|  | 2025 |  | 2024 |  | 2025 |  | 2024
Net income (loss) attributable to common stockholders |  | $ | (112,620) |  |  | $ | (27,503) |  |  | $ | (231,710) |  |  | (8,183) |
Adjustment of NCI to fair value |  | — |  |  | — |  |  | (10,276) |  |  | — |
Adjustment to redemption value (ASC 480) |  | (569) |  |  | (2,402) |  |  | (2,717) |  |  | (2,533) |
Numerator of basic and diluted EPS |  | $ | (113,189) |  |  | $ | (29,905) |  |  | $ | (244,703) |  |  | (10,716) |
Per Share: |  |  |  |  |  |  |  |
Basic |  | $ | (2.35) |  |  | $ | (0.63) |  |  | $ | (5.11) |  |  | $ | (0.23) |
Diluted |  | $ | (2.35) |  |  | $ | (0.63) |  |  | $ | (5.11) |  |  | $ | (0.23) |
Schedule of Repurchased Shares | The following table shows shares repurchased by year.
($ in thousands, except per share) |  | Year Ended December 31, |  | YTD 2025
| 2022 |  | 2023 |  | 2024 |
Shares repurchased |  | 1,605,316 |  | 325,068 |  | 937,141 |  | 292,191
Total cost |  | $ | 14,217 |  |  | $ | 4,510 |  |  | $ | 11,678 |  |  | $ | 3,301 |
Average purchase price per share |  | $ | 8.86 |  |  | $ | 13.88 |  |  | $ | 12.46 |  |  | $ | 11.30 |
Unused authorization amount |  |  |  |  |  | $ | 8,449 |
Subsequent to September 30, 2025, Ambac repurchased 3,142,554 common shares in the open market at an average price of $8.46 (including brokerage commissions) under a 10b5-1 program. As of the date of this filing $8,449 of unused capacity remains under Ambac's current share repurchase authorization.

X
- Definition Schedule of Repurchased Shares + References No definition available. + Details
Name: | ambc_ScheduleOfRepurchasedSharesTableTextBlock
Namespace Prefix: | ambc_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_EarningsPerShareAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 260 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482662/260-10-50-1 + Details
Name: | us-gaap_ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the weighted average number of shares used in calculating basic net earnings per share (or unit) and diluted earnings per share (or unit). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482662/260-10-50-1 + Details
Name: | us-gaap_ScheduleOfWeightedAverageNumberOfSharesTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration