1ST SOURCE CORP Director's Stock Purchase

John F. Affleck-Graves, a director of 1ST SOURCE CORP, purchased 263 shares of the company's common stock on August 4, 2025. The transaction was priced at $60.68 per share, totaling approximately $15,958.84. Following this transaction, Affleck-Graves owns 19,605 shares of the company's common stock. This purchase was made directly by Affleck-Graves, as indicated by the ownership nature of the transaction. The filing was submitted on August 6, 2025, and signed by John B. Griffith, Attorney-in-Fact.