X0306 4 2022-03-01 0 0000868780 Dorman Products, Inc. DORM 0001769146 Hession David C/O DORMAN PRODUCTS, INC. 3400 WALNUT STREET COLMAR PA 18915 0 1 0 0 SVP and CFO Common Stock 2022-03-01 4 F 0 241 93.54 D 5847.4044 D These shares were withheld by the Issuer upon the vesting of a restricted stock award to satisfy the Reporting Person's tax withholding obligations. Such withholding is treated as a disposition of securities under Section 16 of the Securities Exchange Act of 1934, as amended. The amount shown includes an additional 275.9609 shares of Dorman common stock that have been acquired by the Reporting Person under Dorman's employee stock purchase plan since the Reporting Person's last Form 4 filing. The filing of this Statement shall not be construed as an admission (a) that the person filing this Statement is, for the purposes of Section 16 of the Securities Exchange Act of 1934, as amended, the beneficial owner of any equity securities covered by this Statement, or (b) that this Statement is legally required to be filed by such person. /s/ Frank J. Mahr, by Power of Attorney 2022-03-03