X0306 4 2015-11-03 0 0001091862 Chemtura CORP CHMT 0001454769 Flaherty Billie S. 199 BENSON ROAD MIDDLEBURY CT 06749 0 1 0 0 EVP, Gnrl. Counsel & Secretary Common Stock 2015-11-03 4 S 0 3125 31.86 D 63855 D Common Stock 2015-11-03 4 M 0 5038 20.50 A 68893 D Common Stock 2015-11-03 4 S 0 5038 31.88 D 63855 D Employee Stock Option (right to buy) 20.50 2015-11-03 4 M 0 5038 0.00 D 2023-03-01 Common Stock 5038 15114 D The option exercise and sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person. Includes 145 shares acquired under the Chemtura Corporation 2012 Employee Stock Purchase Plan on September 30, 2015. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $31.86 to $31.88, inclusive. The reporting person undertakes to provide Chemtura Corporation, any security holder of Chemtura Corporation, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within. This option initially represented a right to purchase a total of 20,152 shares. As of March 1, 2015, 13,434 stock options have become exercisable. The remaining 6,718 stock options vest on March 1, 2016. /s/ Alan Schutzman by Power of Attorney 2015-11-04