# Filing Detail

Form 10-K - Annual report [Section 13 and 15(d), not S-K Item 405]:
SEC Accession No. 0001628280-26-014653
Filing Date
2026-03-04
Accepted
2026-03-04 16:29:42
Documents
152
Period of Report
2025-12-31

Document Format Files

Seq | Description | Document | Type | Size
--- | --- | --- | --- | ---
1 | 10-K | ambc-20251231.htm iXBRL | 10-K | 5187488
2 | EX-10.2 | a01-015ex102x4q25x10xk.htm | EX-10.2 | 29616
3 | EX-10.44 | a01-015ex1044x4q25x10k.htm | EX-10.44 | 135714
4 | EX-19.1 | a01-015ex191x4qx10kr.htm | EX-19.1 | 101809
5 | EX-21.1 | a01-015ex211x4q25x10k.htm | EX-21.1 | 17373
6 | EX-23.1 | a01-015ex231x4q25x10k.htm | EX-23.1 | 2291
7 | EX-24.1 | a01-015ex241x4q25x10k.htm | EX-24.1 | 20121
8 | EX-31.1 | a01-015ex311x4q25x10k.htm | EX-31.1 | 9309
9 | EX-31.2 | a01-015ex312x4q25x10k.htm | EX-31.2 | 9256
10 | EX-32.1 | a01-015ex321x4q25x10k.htm | EX-32.1 | 8366
16 |  | ambc-20251231_g1.jpg | GRAPHIC | 3081
17 |  | ambc-20251231_g2.jpg | GRAPHIC | 21848
18 |  | ambc-20251231_g3.jpg | GRAPHIC | 91117
| Complete submission text file | 0001628280-26-014653.txt |  | 28255086

Data Files

Seq | Description | Document | Type | Size
--- | --- | --- | --- | ---
11 | XBRL TAXONOMY EXTENSION SCHEMA DOCUMENT | ambc-20251231.xsd | EX-101.SCH | 168814
12 | XBRL TAXONOMY EXTENSION CALCULATION LINKBASE DOCUMENT | ambc-20251231_cal.xml | EX-101.CAL | 174600
13 | XBRL TAXONOMY EXTENSION DEFINITION LINKBASE DOCUMENT | ambc-20251231_def.xml | EX-101.DEF | 1462133
14 | XBRL TAXONOMY EXTENSION LABEL LINKBASE DOCUMENT | ambc-20251231_lab.xml | EX-101.LAB | 1773560
15 | XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE DOCUMENT | ambc-20251231_pre.xml | EX-101.PRE | 1792143
155 | EXTRACTED XBRL INSTANCE DOCUMENT | ambc-20251231_htm.xml | XML | 4973114

Mailing Address 40 WALL STREET 55TH FLOOR NEW YORK NY 10005
Business Address 40 WALL STREET 55TH FLOOR NEW YORK NY 10005 2126587470
OCTAVE SPECIALTY GROUP INC (Filer) CIK: 0000874501 (see all company filings)

EIN.: 133621676 | State of Incorp.: DE | Fiscal Year End: 1231
Type: 10-K | Act: 34 | File No.: 001-10777 | Film No.: 26721801
SIC: 6351 Surety Insurance
(CF Office: 02 Finance)