X0205 3 2012-05-16 0 0000945436 MEMC ELECTRONIC MATERIALS INC WFR 0001550421 Chinnasami Vijayan S. C/O MEMC ELECTRONIC MATERIALS, INC. P.O. BOX 8 ST. PETERS MO 63376 0 1 0 0 SVP Solar Materials Common Stock 14000 D Common Stock 5000 D Employee Stock Option (Right to Buy) 11.92 2020-08-02 Common Stock 67000 D Employee Stock Option (Right to Buy) 11.63 2021-04-27 Common Stock 32000 D Each restricted stock unit represents a contingent right to receive one share of MEMC common stock. The grant was made on April 27, 2011 pursuant to the MEMC Electronic Materials, Inc. 2010 Equity Incentive Plan and is intended to qualify as an exempt transaction under Rule 16b-3. The 14,000 restricted stock units vest in 50% increments on April 27, 2014 and April 27, 2015. The option to purchase 67,000 shares of common stock was awarded on August 2, 2010 under the MEMC 2010 Equity Incentive Plan in a transaction exempt under Rule 16b-3 and becomes exercisable at an exercise price of $11.92 per share in 10%, 20%, 30% and 40% increments on August 2, 2011, August 2, 2012, August 2, 2013 and August 2, 2014, respectively. The option to purchase 32,000 shares of common stock was awarded on April 27, 2011 under the MEMC 2010 Equity Incentive Plan in a transaction exempt under Rule 16b-3 and becomes exercisable at an exercise price of $11.63 per share in 10%, 20%, 30% and 40% increments on April 27, 2012, April 27, 2013, April 27, 2014 and April 27, 2015, respectively. /s/ Vijayan S. Chinnasami 2012-05-18