X0206 3 2022-05-25 0 0000868780 Dorman Products, Inc. DORM 0001931700 Long Donna M. C/O DORMAN PRODUCTS, INC. 3400 EAST WALNUT STREET COLMAR PA 18915 0 1 0 0 SVP, CIO Common Stock 16295.8738 D Employee Stock Option (right to buy) 72.55 2023-03-07 Common Stock 508 D Employee Stock Option (right to buy) 84.93 2027-03-06 Common Stock 1231 D Employee Stock Option (right to buy) 61.68 2028-03-02 Common Stock 3277 D Employee Stock Option (right to buy) 101.45 2029-03-02 Common Stock 1707 D Employee Stock Option (right to buy) 96.36 2030-03-02 Common Stock 1761 D The option, originally an option for a total of 1,730 shares, vested in four equal annual installments beginning on March 7, 2019, which was the first anniversary of the date of grant. The option, originally an option for a total of 1,615 shares, vests in four equal annual installments beginning on March 6, 2020, which was the first anniversary of the date of grant. The option, originally an option for a total of 4,369 shares, vests in four equal annual installments beginning on March 2, 2021, which was the first anniversary of the date of grant. The option vests in four equal annual installments beginning on March 2, 2022, which was the first anniversary of the date of grant. The option vests in four equal annual installments beginning on March 2, 2023, which is the first anniversary of the date of grant. 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 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 2022-06-02