---
schema_version: "secwatch.filing_event.v1"
accession: "0000874501-25-000084"
form_type: "8-K"
ticker: "OSG"
cik: "0000874501"
company_name: "OCTAVE SPECIALTY GROUP INC"
filed_at: "2025-05-12T23:59:59+00:00"
generated_at: "2026-05-22T01:03:18.312559+00:00"
event_type: "earnings"
sentiment: "negative"
materiality_score: 0.75
calibrated_materiality_score: 0.75
confidence: "high"
source: SEC EDGAR
---

# Ambac Q1 revenue up 27% to $63M but net loss widens; adjusted EBITDA negative

## Summary
- Total P&C premium production up 70% to $318M; revenue from continuing ops $63M (+27% YoY).
- Net loss from continuing ops attributable to shareholders of $16.1M vs $4.1M loss in Q1'24.
- Diluted EPS from continuing ops loss of $1.22 vs prior year EPS of $0.44 gain.
- Adjusted EBITDA to shareholders negative $1.3M vs positive $0.4M; Cirrata segment adjusted EBITDA up 136%.
- Legacy business sale pending only Wisconsin regulatory approval; discontinued ops net loss of $30.2M.

## SEC filing metadata
- accession: 0000874501-25-000084
- form_type: 8-K
- ticker: OSG
- cik: 0000874501
- company_name: OCTAVE SPECIALTY GROUP INC
- filed_at: 2025-05-12T23:59:59+00:00
- event_type: earnings
- sentiment: negative
- materiality_score: 0.75
- calibrated_materiality_score: 0.75
- confidence: high
- sec_items: 2.02, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/874501/000087450125000084/0000874501-25-000084-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/874501/000087450125000084/ambc-20250512.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000874501-25-000084
- JSON: https://secwatch.observer/filing/0000874501-25-000084.json
- Plain text: https://secwatch.observer/filing/0000874501-25-000084.txt

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.