X0306 4 2023-03-01 0 0001054905 INNOSPEC INC. IOSP 0001338883 Williams Patrick 8310 SOUTH VALLEY HIGHWAY SUITE 350 ENGLEWOOD CO 80112 0 1 0 0 PRESIDENT & CEO Common Stock 2023-03-01 4 S 0 4540 109.2755 D 161973 D Common Stock 2023-03-01 4 S 0 4328 110.0649 D 157645 D Common Stock 2023-03-01 4 S 0 275 110.8976 D 157370 D The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions in prices ranging from $108.67 to $109.66, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, 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 ranges set forth in footnotes (1), (2) and (3) to this Form 4. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions in prices ranging from $109.67 to $110.66, inclusive. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions in prices ranging from $110.77 to $111.12, inclusive. Patrick Scott Williams 2023-03-02