Donnelley Financial Solutions(DFIN) - 2025 Q1 - Quarterly Results

Exhibit 99.1 DFIN Reports First-Quarter 2025 Results CHICAGO – April 30, 2025 – Donnelley Financial Solutions, Inc. (NYSE: DFIN) (the "Company" or "DFIN") today reported financial results for the first quarter of 2025. Highlights for the first quarter of 2025: (a) Adjusted EBITDA, Adjusted EBITDA margin, organic net sales, gross leverage and net leverage are non-GAAP financial measures that exclude the impact of certain items noted in the reconciliation tables below. The tables below provide reconciliations ...