Ambac Financial Group stock changes as ticker shifts to OSG

Published on 09/22/2026 at 18:27 | Editorial responsibility: Rafael Müller, Editor-in-Chief AD HOC NEWS

Ambac Financial Group stock traded under the OSG symbol on September 21, 2026, at USD 4.41. The company name and listing identity have changed.

AMBC, US0234361089, Illustration mit AI erstellt.

Ambac Financial Group stock is now tied to the OSG symbol after the company changed its name and ticker, while the latest quoted price was USD 4.41 on the New York Stock Exchange as of September 21, 2026. The identity change is the central fact for investors tracking the former AMBC listing.

AMBC ticker gives way to OSG

According to MarketBeat on September 22, 2026, Octave Specialty Group uses the NYSE symbol OSG and lists AMBC as its previous symbol. The page also identifies the company in the insurance sector, linking the former AMBC reference to the current OSG listing.

The quoted OSG price was USD 4.41 at 3:58 p.m. Eastern Time on September 21, 2026, down USD 0.09, or 2.00 percent, from the prior close. That dated quotation provides the usable market reference for the former AMBC security.

Price target remains above quote

MarketBeat reported on September 22, 2026, that the stock had a consensus rating of Hold and an average price target of USD 11.50. The quoted target stood USD 7.09 above the USD 4.41 market price, a difference of about 160.8 percent based on the portal's calculation.

The same September 22, 2026 market overview listed a high price target of USD 15.00 and a low target of USD 8.00. Those figures describe the range of published expectations shown for OSG, but they do not represent a recommendation in this article.

Former AMBC identity needs care

The symbol transition matters because searches for AMBC can now point to an earlier security identifier rather than the active quotation. The current listing information names OSG as the symbol, so price comparisons must use the OSG quote and the New York Stock Exchange venue consistently.

For investors reviewing historical Ambac data, the distinction between the former AMBC symbol and the current OSG symbol is more important than a simple day move. The September 21, 2026 price of USD 4.41, the 2.00 percent daily decline, and the USD 11.50 consensus target all refer to the current OSG listing context.

Stock closes at USD 4.41

OSG closed at USD 4.41 on the New York Stock Exchange on September 21, 2026, at 3:58 p.m. Eastern Time, according to the quoted market data. The company is presented in the current listing data as Octave Specialty Group, with AMBC shown as the previous symbol.