Exhibit 99.1 For: Immediate Release Contact: Brett Bauer October 24, 2024 574-235-2000 1st Source Corporation Reports Third Quarter Results, Cash Dividend Declared QUARTERLY HIGHLIGHTS South Bend, IN - 1st Source Corporation (NASDAQ: SRCE), parent company of 1st Source Bank, today reported quarterly net income of $34.94 million for the third quarter of 2024, compared to$36.79 million the previous quarter and up 6.07% from the $32.94 million reported in the third quarter a year ago. Year-to-date 2024 net in ...