Advanced Magnetics to offer 2 million shares

Advanced Magnetics Inc., a Cambridge maker of medical imaging contrast agents, plans to offer 2 million shares of common stock to the public.

Proceeds from the sale will be used for general corporate purposes, which may include ‘‘working capital, ongoing research and development activities, and capital expenditures,’’ according to documents filed with the Securities and Exchange Commission.

The company intends to grant the underwriters a 30-day option to purchase up to 300,000 additional shares.

Morgan Stanley & Co. is sole book-running manager for the offering.
(AP)