EXHIBIT 99.1 NEWS RELEASE Ducommun Incorporated Reports First Quarter 2024 Results Record Start to the Year for both Q1 Revenue and Gross Margins SANTA ANA, CALIFORNIA (May 8, 2024) – Ducommun Incorporated (NYSE: DCO) (“Ducommun” or the “Company”) today reported results for its first quarter ended March 30, 2024. First Quarter 2024 Recap • Net revenue was $190.8 million, an increase of 5.3% over Q1 2023 • Net income of $6.8 million, or $0.46 per diluted share, or 3.6% of revenue, up 70 bps year-over-year • ...