YYM BioSciences prices underwritten public offering of 25,000,000 common shares

YM BioSciences Inc. (NYSE Amex: YMI; TSX: YM), a life sciences product development company that identifies and advances a diverse portfolio of promising cancer-related products at various stages of development, today announced that it has priced an underwritten public offering of 25,000,000 common shares at a price to the public of $1.60 per share.

The Company expects that the offering will yield gross proceeds, before expenses, of approximately $40.0 million and intends to use the net proceeds of the offering to fund its drug development activities and for general corporate purposes. The offering is expected to close on December 17, 2010, subject to customary closing conditions. In connection with the offering, the Company also granted the underwriters a 30-day option to purchase up to 3,750,000 additional common shares to cover over-allotments, if any.

Roth Capital Partners, LLC is acting as the sole book-running manager for the offering. JMP Securities and Rodman & Renshaw LLC acted as co-managers. Bloom Burton & Co. is acting as financial advisor to YM BioSciences in connection with the offering. The securities described above are being offered by the Company pursuant to a registration statement filed with the Securities and Exchange Commission (SEC), which became effective on December 1, 2010.