X0306 4 2019-05-30 0 0001054905 INNOSPEC INC. IOSP 0001466144 Watt Brian 8310 SOUTH VALLEY HIGHWAY SUITE 350 ENGLEWOOD CO CO80112 0 1 0 0 VP, Strat Plan & Regulatory Common Stock 2019-05-30 4 S 0 1896 81.98 D 30992 D Common Stock 2019-05-30 4 S 0 73 82.53 D 30919 D Common Stock 2019-05-30 4 S 0 31 82.54 D 30888 D This transaction was executed in multiple trades at prices ranging from $81.45 to $82.43. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the Commission staff, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. Brian Watt 2019-05-31