A municipal-bond firm said it will go public.

MBIA, the holding company of Municipal Bond Investors Assurance Corp., filed a registration statement with the Securities and Exchange Commission for its first public offering of stock--5.5 million shares of its common stock, a 15% stake, at an offering price of between $22 and $25 per share. The company, which insures municipal bonds and is based in White Plains, N.Y., said it will seek to list its common stock on the New York Stock Exchange. Current holders are Aetna Life & Casualty and Aetna Insurance, Fireman’s Fund, Continental Insurance and certain of their affiliates.