X0306 4 2015-08-03 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 2015-08-03 4 S 0 3596 27.21 D 70244 D Common Stock 2015-08-03 4 S 0 3409 27.02 D 66835 D Common Stock 2015-08-03 4 M 0 19450 15.38 A 86285 D Common Stock 2015-08-03 4 S 0 19450 27.02 D 66835 D Employee Stock Option (right to buy) 15.38 2015-08-03 4 M 0 19450 0.00 D 2022-03-01 Common Stock 19450 0 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. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $27.13 to $27.38, 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. Includes 128 shares acquired under the Chemtura Corporation 2012 Employee Stock Purchase Plan on June 30, 2015. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $26.83 to $27.22, 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. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $26.77 to $27.22, 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, which initially represented a right to purchase a total of 28,733 shares (9,283 of which were purchased on May 4, 2015), became exercisable in three equal installments on March 1, 2013; March 1, 2014; and March 1, 2015. /s/ Alan Schutzman by Power of Attorney 2015-08-05