Form 4 Filing for Cass Information Systems Inc.

This filing reports a transaction by Ann W. Marr, a director at Cass Information Systems Inc. On April 23, 2026, Marr acquired 1704 shares of Common Stock at a price of $46.94 per share. Following this transaction, Marr owns 8460 shares of Common Stock. The shares acquired include restricted stock bonus shares that are subject to vesting and forfeiture, as indicated by footnote F1. This transaction is classified as direct ownership.