OSG Octave Specialty Group, Inc.
NYSEActiveCommon stock
OSG is the ticker symbol of Octave Specialty Group, Inc., which is listed on NYSE. The symbol was previously used by Overseas Shipholding Group Inc..
OSG at a glance
- Symbol
- OSG
- Company / issuer
- Octave Specialty Group, Inc.
- Security type
- Common stock
- Exchange
- NYSE
- Status
- Actively traded
- Seen in listing files
- Jan 2021 – present
- Sector
- Finance
- Industry
- Property-Casualty Insurers
- Country
- United States
- IPO year
- 2015
- Market cap
- $186.5 million (Sep 2026)
OSG ticker history
All companies and securities we have recorded under the symbol OSG, from periodic snapshots of US exchange listing files.
| Name | Security | First seen | Last seen |
|---|---|---|---|
| Overseas Shipholding Group Inc. | Class A Common Stock | Jan 2021 | Jun 2024 |
| Octave Specialty Group, Inc. | Common Stock | Nov 2025 | present |
Octave Specialty Group, Inc. company profile
- Industry (SIC)
- Surety Insurance
- Headquarters
- New York, NY
- Incorporated in
- DE
- Fiscal year end
- December 31
- SEC filer category
- Accelerated filer
- Latest annual report
- 10-K filed 2026-03-04
- Latest interim report
- 10-Q filed 2026-08-06
- SEC CIK
- 874501
Former company names
- Ambac Financial Group Inc (until 2025)
- Ambac Inc (until 1998)
Source: SEC EDGAR filer data.
OSG price chart
Interactive chart provided by TradingView (loads third-party scripts).
Frequently asked questions
What company has the ticker symbol OSG?
OSG is the ticker symbol of Octave Specialty Group, Inc on NYSE.
Is OSG still trading?
Yes. OSG appears in the current NYSE listings as of Sep 2026.
Which companies have used the ticker OSG?
Our listing records show OSG used by: Overseas Shipholding Group Inc.; Octave Specialty Group, Inc..
Which exchange is OSG listed on?
OSG is listed on NYSE.
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