Dorman Products, Inc.

1. These shares were withheld by the Issuer upon the vesting of restricted stock units 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.

2. These shares are held in trust for the benefit of the reporting person's grandchildren. The reporting person's spouse is a co-trustee of the trust. The reporting person disclaims beneficial ownership of the shares held by such trust, and this report should not be deemed an admission that the reporting person is the beneficial owner of the trust's shares for purposes of Section 16 or for any other purpose.

3. The shares are represented by units held in a unitized stock fund through the Issuer's 401(k) Retirement Plan and Trust. The unitized stock fund of the Issuer's 401(k) Retirement Plan and Trust consists of cash and common stock in amounts that vary from time to time. As of March 2, 2026, the reporting person had 16,341 units in the Issuer's 401(k) Retirement Plan and Trust, which units consisted of 24,429 shares of common stock.