Form 4 Filing for BYLINE BANCORP, INC.

This Form 4 filing details a transaction by Doran Brian F, General Counsel of BYLINE BANCORP, INC. On February 22, 2026, Mr. Doran acquired 1783 shares of Common Stock under transaction code "A", with a post-transaction share count of 2533. The shares acquired are restricted and subject to time vesting over three years, contingent upon continued employment, as indicated by footnote F1. The transaction price was reported as $0.00 per share. The filing was signed by Mr. Doran on February 24, 2026. This transaction is directly owned.