Exhibit 99.1 DFIN Reports First-Quarter 2024 Results CHICAGO – May 1, 2024 – Donnelley Financial Solutions, Inc. (NYSE: DFIN) (the “Company” or “DFIN”) today reported financial results for the first quarter of 2024. First-quarter 2024 First-quarter 2023 $Change$203.4 million $198.6 million$4.8 million 2.4% Net Earnings $33.3 million$15.8 million $17.5 million 110.8$55.2 million $42.4 million$12.8 million 30.2% Operating Cash Flow (b) ($27.9 million) ($51.5 millio ...