Ambac rebrands to Octave Specialty Group, new ticker OSG starting Nov 20

OCTAVE SPECIALTY GROUP INC

Name changed to Octave Specialty Group, Inc. effective Nov 10, 2025; AMBC ticker to OSG on Nov 20.
Subsidiaries rebranded: Cirrata Group becomes Octave Partners, Beat Capital Partners becomes Octave Ventures.
Legacy financial guarantee business sold; company now focused on building MGA platform across U.S., U.K., Bermuda.
CEO Claude LeBlanc says rebrand marks culmination of transformation into a diversified specialty insurance enterprise.

Key facts

Extracted from this filing and checked against the source text.

Governance Changes SEC 8-K Item 5.03/5.05/5.06 confidence 0.9

OCTAVE SPECIALTY GROUP INC: Amended certificate of incorporation to change company name to 'Octave Specialty Group, Inc.' (effective 2025-11-10).

Change: charter amendment
Effective: 2025-11-10

Exact text from the filing

On November 10, 2025, the Company filed with the Secretary of State of the State of Delaware a certificate of amendment to its certificate of incorporation, changing the Company’s name to “Octave Specialty Group, Inc.” (the “Name Change”).

View on SEC.gov

Governance Changes SEC 8-K Item 5.03/5.05/5.06 confidence 0.9

OCTAVE SPECIALTY GROUP INC: Amended and restated bylaws to reflect the company name change (effective 2025-11-10).

Change: bylaw amendment
Effective: 2025-11-10

Exact text from the filing

In connection with the Name Change, the bylaws of the Company were amended and restated in their entirety to reflect the Name Change.

View on SEC.gov

259 governance changes filed in the last 30 days. Browse all governance changes →

OCTAVE SPECIALTY GROUP INC filing history →

Source: SEC EDGAR

accession 0001628280-25-051169

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