X0303 4 2011-04-28 0 0000885721 EXPRESS SCRIPTS INC ESRX 0001129892 TOAN BARRETT A C/O EXPRESS SCRIPTS, INC. ONE EXPRESS WAY ST. LOUIS MO 63121 1 0 0 0 Common Stock 2011-04-28 4 M 0 84000 11.8425 A 386704 D Common Stock 2011-04-28 4 M 0 8464 35.8450 A 395168 D Common Stock 2011-04-28 4 M 0 4376 30.8300 A 399544 D Non-Qualified Stock Option (Right-to-Buy) 11.8425 2011-04-28 4 M 0 84000 D 2012-05-25 Express Scripts Inc. Common Stock 84000 0 D Non-Qualified Stock Option (Right-to-Buy) 35.845 2011-04-28 4 M 0 8464 D 2015-05-28 Express Scripts Inc. Common Stock 8464 4230 D Non-Qualified Stock Option (Right-to-Buy) 30.83 2011-04-28 4 M 0 4376 D 2016-05-27 Express Scripts Inc. Common Stock 4376 8752 D Options vest on May 24, 2006. Options vest in three equal installments on May 1, 2009, May 1, 2010, and May 1, 2011. Options vest in three equal installments on May 1, 2010, May 1, 2011, and May 1, 2012. Options are subject to early termination upon the occurrence of certain events, including voluntary retirement. Stock Option granted pursuant to Express Scripts, Inc. 2000 Long-Term Incentive Plan. Barrett Toan 2011-04-28