Octave Specialty (OSG) traded flat 0 % during a 24 hours period ending at 09:24 AM Central Europe on Wednesday 28th. One Octave Specialty stock can currently be bought for about USD 4.82 on popular exchanges. Current supply of Octave Specialty stocks is 45.3 mn. Octave Specialty has a current market capitalization of USD 216.3 mn and approximately USD 1.3 mn worth of Octave Specialty was traded on exchanges in the last 24 hours. Since last month end, Octave Specialty has traded 17.56 % up. Simple moving average of last 200 days is at USD 5.16. The highest price of past 52 weeks was recorded at USD 10.38 on 11/11/2025. 52 weeks low was at USD 3.88 on 04/10/2026.

Summary of the latest news for Octave Specialty

BlackRock Portfolio Management LLC filed a Schedule 13G with the U.S. Securities and Exchange Commission on 27 October 2026, reporting ownership of approximately 6.5 percent of the common stock of Octave Specialty Group Inc. The filing lists about 2.9 million shares under BlackRock’s control, with the bulk of the voting and discretionary power held by the firm. The disclosure confirms that no single shareholder holds more than five percent of the company’s outstanding shares, and that the securities were acquired in the ordinary course of business without intent to influence control. The submission also includes the required certification that the holdings are not held for the purpose of changing control and a power‑of‑attorney exhibit. No additional material related to the company’s operations or financial performance is contained in the filing.

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About Octave Specialty

Ambac Financial Group, Inc. is a holding company that offers financial guarantee, insurance, and financial management services. Through its subsidiaries, the company insures municipal and structured finance obligations. Ambac provides investment agreements, interest rate swaps, investment management advisory, and cash management services to states and municipalities. You can find more information about the company and its offerings on its website at www.ambac.com . The company is listed on the New York Stock Exchange. It went public on July 11, 1991.