X0303 4 2011-04-12 0 0001274913 INHIBITEX, INC. INHX 0001412554 Henson Geoffrey W. 9005 WESTSIDE PARKWAY ALPHARETTA GA 30009 0 1 0 0 Vice President Employee Stock Option (right to buy) 1.00 2011-04-12 4 A 0 56000 1.00 A 2011-04-12 2014-11-04 Common Stock 56000 56000 D On November 4, 2009, the reporting person was granted an option to purchase 112,000 shares of common stock. The option is exercisable in two equal installments based upon the achievement of specific performance conditions. On April 12, 2011, a performance criteria was met in vesting of the option as to 50% of the shares. /s/Russell H. Plumb Attorney-in-fact for Geoffrey W. Henson 2011-04-14