X0306 4 2023-02-24 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 2023-02-24 4 M 0 1323 95.70 A 184802 D Common Stock 2023-02-24 4 D 0 1323 109.42 D 183479 D Common Stock 2023-02-27 4 S 0 21 108.31 D 183458 D Common Stock 2023-02-27 4 S 0 501 110.0556 D 182957 D Common Stock 2023-02-27 4 S 0 6699 111.1555 D 176258 D Common Stock 2023-02-27 4 S 0 1925 111.6911 D 174333 D Common Stock 2023-02-27 4 A 0 1326 0.00 A 175659 D Common Stock 2023-02-28 4 S 0 3415 110.0376 D 172244 D Common Stock 2023-02-28 4 S 0 5444 110.9672 D 166800 D Common stock 2023-02-28 4 S 0 287 111.5846 D 166513 D Stock Appreciation Right 95.70 2023-02-24 4 M 0 1323 0.00 D 2023-02-24 2030-02-24 Common Stock 1323 0 D Employee stock option (right to buy) 109.42 2023-02-27 4 A 0 3979 0.00 A 2026-02-27 2033-02-27 Common Stock 3979 3979 D The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions in prices ranging from $109.43 to $110.42, 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), (3), (5), (6) and (7) 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 $110.495 to $111.49, inclusive. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions in prices ranging from $111.50 to $112.02, inclusive. Represents Restricted Stock Units ("RSUs") granted on February 27, 2023 which vest in full on February 27, 2026. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions in prices ranging from $110.46 to $110.4518, inclusive. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions in prices ranging from $110.46 to $111.425, inclusive. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions in prices ranging from $111.475 to $111.7, inclusive. Patrick Scott Williams 2023-03-01