STOCKHOLDERS' EQUITY

12 Months Ended

Dec. 31, 2011

STOCKHOLDERS' EQUITY

STOCKHOLDERS' EQUITY

9. STOCKHOLDERS' EQUITY

• Authorized and Outstanding Capital Stock

        The Company is authorized to issue 200,000,000 shares of common stock, $0.0001 par value per share, 4,687,684 shares of class C special stock, $0.0001 par value per share, and 10,000,000 shares of undesignated preferred stock, $0.0001 par value per share.

        No shares of preferred stock were outstanding as of December 31, 2011 or 2010.

        There were 65,214 shares of class C special stock issued and outstanding as of December 31, 2011 and 2010. Each share of class C special stock entitles its holder to one vote per share. Each share of class C special stock is exchangeable, at the option of the holder, for one share of the Company's common stock, at an exchange price of $15.00 per share, subject to adjustment upon certain capitalization events. Holders of class C special stock are not entitled to receive dividends or to participate in the distribution of the Company's assets upon any liquidation, dissolution or winding-up of the Company. The holders of class C special stock have no cumulative voting, preemptive, subscription, redemption or sinking fund rights.

        There were 18,269,754 and 13,565,188 shares of common stock issued and outstanding as of December 31, 2011 and 2010, respectively. The Company has presented the par values of its common stock and the related additional paid in capital on a combined basis for all periods presented.

• Underwritten Public Offering

        On August 2, 2011, the Company completed an underwritten public offering of an aggregate of 2.7 million shares of its common stock at a purchase price of $18.00 per share, resulting in net proceeds of approximately $45.0 million, after underwriters' discounts, commissions and offering expenses.

• Registered Direct Offerings

        On March 8, 2011, the Company completed a registered direct offering of 2,033,247 shares of its common stock and warrants to purchase an aggregate of 711,636 shares of its common stock at a purchase price of $12.3678 per share to institutional investors for gross proceeds of $25.1 million. The offering resulted in net proceeds to the Company of $23.9 million, after deducting placement agent fees and offering expenses. The warrants are exercisable immediately and continuing for a period of three years, at an exercise price of $13.50 per share. In connection with the offering, the Company issued the placement agent warrants to purchase an aggregate of 40,665 shares of the Company's common stock at an exercise price of $15.48 per share, which warrants are exercisable immediately and will expire on June 9, 2014.

        On March 8, 2010, the Company completed a registered direct offering of an aggregate of 1,734,104 shares of its common stock and warrants to an aggregate of 867,052 shares of its common stock, at a purchase price of $10.38 per share to funds affiliated with two institutional investors resulting in net proceeds to the Company of approximately $17.5 million, after deducting placement agent fees and other offering expenses. The warrants are exercisable beginning on September 9, 2010, have an exercise price of $12.48 per share and will expire on September 8, 2015. In connection with the offering, the Company issued the placement agent warrants to purchase an aggregate of 34,682 shares of the Company's common stock at an exercise price of $12.96 per share, which warrants are exercisable beginning on September 8, 2010 and will expire on June 9, 2014.

        On June 23, 2010, the Company completed a registered direct offering of 1,189,061 shares of its common stock and warrants to purchase an aggregate of 594,530 shares of its common stock at a purchase price of $12.615 per share to funds affiliated with certain institutional investors for gross proceeds of $15.0 million. The offering resulted in net proceeds to the Company of approximately $14.1 million, after deducting placement agent fees and offering expenses. The warrants are exercisable immediately, have an exercise price of $14.70 per share and will expire on June 23, 2015. In connection with the offering, the Company issued the placement agent warrants to purchase an aggregate of 35,671 shares of the Company's common stock at an exercise price of $15.78 per share, which warrants are exercisable immediately and will expire on June 9, 2015.

        On December 31, 2010, the Company completed a registered direct offering of 1,764,706 shares of its common stock and warrants to purchase an aggregate of 882,353 shares of its common stock at a purchase price of $10.20 per share to funds affiliated with certain institutional investors for gross proceeds of $18.0 million. The offering resulted in net proceeds to the Company of approximately $16.9 million, after deducting placement agent fees and offering expenses. The warrants are exercisable immediately, have an exercise price of $12.00 per share and expire on December 30, 2015. In connection with the offering, the Company issued the placement agent warrants to purchase an aggregate of 52,941 shares of the Company's common stock at an exercise price of $12.75, which warrants are exercisable immediately and will expire on June 9, 2015.

• Acquisition of Net Assets of Cell Genesys

        In October 2009, the Company acquired Cell Genesys in a direct merger. As a result of the merger, each share of common stock of Cell Genesys issued and outstanding immediately prior to the effective time of the merger was converted into the right to receive 0.0305 of a share of the Company's common stock. In the aggregate, the Company issued approximately 3.4 million shares of its common stock to former Cell Genesys stockholders in connection with the merger. All options to purchase shares of Cell Genesys common stock, other than certain designated options held by certain of Cell Genesys's former officers (Assumed Options), became fully vested and exercisable until immediately prior to the effective time of the merger. At the effective time of the merger, such unexercised options other than the Assumed Options terminated. The Assumed Options were assumed by the Company and will remain outstanding following the merger, but converted into and became options to purchase shares of the Company's common stock on terms substantially identical to those in effect prior to the merger, except for adjustments to the underlying number of shares and the exercise price based on the 0.0305 exchange ratio. As a result of the merger, the Assumed Options converted into options to purchase an aggregate of 39,071 shares of the Company's common stock at a weighted average exercise price of $118.38 per share. All warrants to purchase shares of Cell Genesys common stock which by their terms survived the merger (Assumed Warrants) were assumed by the Company, but were converted into and became warrants to purchase shares of the Company's common stock on terms substantially identical to those in effect prior to the merger, except for adjustments to the underlying number of shares and the exercise price based on the 0.0305 exchange ratio. As a result of the merger, these Assumed Warrants converted into warrants to purchase an aggregate of 65,874 shares of the Company's common stock at a weighted average exercise price of $235.62 per share.

        For additional discussion regarding the merger with Cell Genesys and the assets and liabilities acquired, see Note 4, "Acquisition of Net Assets of Cell Genesys."

• Convertible Senior Notes

        See Note 7, "Convertible Senior Notes" for information regarding the convertible senior notes assumed in the Cell Genesys merger.

• Warrants

        As of December 31, 2011, warrants to purchase an aggregate of 3,794,741 shares of the Company's common stock were outstanding and exercisable as of December 31, 2011:

Issue Date	Number of Underlying Shares Of Common Stock		Per Share Exercise Price		Expiration Date
December 15, 2008		50,000	$	24.00		June 14, 2014
July 21, 2009		30,000	$	12.00		July 20, 2012
August 13, 2009		400,000	$	15.00		August 12, 2014
August 13, 2009		40,000	$	15.00		June 9, 2014
October 14, 2009		65,874	$	235.62		April 1, 2012
March 8, 2010		867,052	$	12.48		September 8, 2015
March 8, 2010		34,682	$	12.96		June 9, 2014
June 23, 2010		594,530	$	14.70		June 23, 2015
June 23, 2010		35,671	$	15.78		June 9, 2015
November 22, 2010		30,000	$	12.00		November 21, 2013
December 30, 2010		882,353	$	12.00		December 30, 2015
December 30, 2010		52,941	$	12.75		June 9, 2015
March 8, 2011		670,971	$	13.50		March 8, 2014
March 8, 2011		40,665	$	15.48		June 9, 2014

        During 2011, the Company issued warrants to purchase an aggregate of 711,636 shares of the Company's common stock in connection with the March 2011 registered direct offering as described above. During 2011, warrants to purchase an aggregate of 1,458 shares of common stock were exercised and warrants to purchase an aggregate of 151,868 shares of the Company's common stock expired unexercised.

        During 2010, the Company issued warrants to purchase an aggregate of 2,467,230 shares of the Company's common stock in connection with registered direct offerings as described above, and warrants to purchase 30,000 shares of the Company's common stock as compensation for investor relations services as described below. During 2010, no warrants were exercised and warrants to purchase an aggregate of 127,291 shares of the Company's common stock expired unexercised.

        During 2009, the Company issued warrants to purchase an aggregate of 440,000 shares of the Company's common stock in connection with a registered direct offering, warrants to purchase an aggregate of 65,874 shares of the Company's common stock in connection with the Cell Genesys merger, and warrants to purchase 30,000 shares of the Company's common stock as compensation for investor relations services as described below. During 2009, no warrants were exercised and warrants to purchase an aggregate of 89,166 shares of the Company's common stock expired unexercised.

        In 2011, 2010 and 2009, the Company issued warrants to purchase 0, 30,000 and 30,000 shares of the Company's common stock, respectively, in consideration for various investor relations services. The warrants became exercisable on a ratable basis over a twelve-month period from the date of grant. The Company uses the Black-Scholes pricing model to value these types of warrants and remeasures the awards each quarter until the measurement date is established. For the years ended December 31, 2011, 2010 and 2009, the Company recorded $204,980, $65,529 and $64,103, respectively, in non-cash general and administrative expense pertaining to consultant warrants.