Exhibit 99.1 Dorman Products, Inc. Reports First Quarter 2024 Results Highlights (All comparisons are to the prior year period unless otherwise noted): • Net sales of $468.7 million, up 0.4$466.7 million • Diluted earnings per share (“EPS”) of $1.05, up 483$0.18 • Adjusted diluted EPS* of $1.31, up 134$0.56 • Generated $52 million of cash from operating activities; repaid$15 million of debt and repurchased $27 million of its shares • The Company confirms its full-y ...