# EDGAR Filing Document

**Accession Number:** 0000874501
**File Stem:** 0001628280-26-024697
**Filing Date:** 2026-4
**Character Count:** 1374
**Document Hash:** 256e79defc0be388fe5a27e7fb5958e8
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001628280-26-024697.hdr.sgml**: 20260410

**ACCESSION NUMBER**: 0001628280-26-024697

**CONFORMED SUBMISSION TYPE**: ARS

**PUBLIC DOCUMENT COUNT**: 1

**CONFORMED PERIOD OF REPORT**: 20251231

**FILED AS OF DATE**: 20260410

**DATE AS OF CHANGE**: 20260410

**EFFECTIVENESS DATE**: 20260410

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** OCTAVE SPECIALTY GROUP INC
- **CENTRAL INDEX KEY:** 0000874501
- **STANDARD INDUSTRIAL CLASSIFICATION:** SURETY INSURANCE [6351]
- **ORGANIZATION NAME:** 02 Finance
- **EIN:** 133621676
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** ARS
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-10777
- **FILM NUMBER:** 26855047

**BUSINESS ADDRESS:**
- **STREET 1:** 40 WALL STREET
- **STREET 2:** 55TH FLOOR
- **CITY:** NEW YORK
- **STATE:** NY
- **ZIP:** 10005
- **BUSINESS PHONE:** 2126587470

**MAIL ADDRESS:**
- **STREET 1:** 40 WALL STREET
- **STREET 2:** 55TH FLOOR
- **CITY:** NEW YORK
- **STATE:** NY
- **ZIP:** 10005

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** AMBAC FINANCIAL GROUP INC
- **DATE OF NAME CHANGE:** 19980121

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** AMBAC INC /DE/
- **DATE OF NAME CHANGE:** 19930328

### Attached PDF Documents

**Attachment 1:** `a2025annualreport_final.pdf`

_No text found in this document._