X0202 SCHEDULE 13G/A 0001667420 XXXXXXXX LIVE 2 Common Stock, no par value 03/31/2026 0000034782 1st Source Corporation 336901103 100 North Michigan Street South Bend IN 46601 Rule 13d-1(c) Oliver Cromwell Carmichael III X1 1208724 19516 1208724 19516 1228240 4.9 IN Based on 25,207,759 outstanding shares of the Issuer's common stock as of February 12, 2026, as reported by the Issuer to the reporting person. 1st Source Corporation 100 North Michigan Street, South Bend, Indiana 46601 Oliver Cromwell Carmichael III 2605 Elm Hill Pike, Suite I, Nashville, Tennessee 37214 United States Y 1,228,240 4.9% 1,208,724 19,516 1,208,724 19,516 N Y N Of the shares reported herein, (i) 739,777 shares are held in various trusts for the benefit of Mr. Carmichael's children for which Mr. Carmichael serves as trustee and has sole voting and dispositive power; and (ii) 19,516 shares are held directly by Mr. Carmichael's spouse, as to which Mr. Carmichael may be deemed to be attributed shared voting and dispositive power with his spouse. Y Y Y N By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under § 240.14a-11. Oliver Cromwell Carmichael III /s/ Oliver Cromwell Carmichael III 07/06/2026