Form 4 Filing for Michael R. McMullen

This filing details a transaction by Michael R. McMullen, a director at BRISTOL MYERS SQUIBB CO. On September 30, 2026, Mr. McMullen acquired 560.897 Deferred Share Units, which convert to common stock upon settlement. This acquisition, valued at $62.40 per unit, brings his total ownership of these units to 17,050.601. The Deferred Share Units become settleable upon Mr. McMullen ceasing to be a director or at a future specified date. This also includes deferred compensation and reinvested dividends from the 1987 Deferred Compensation Plan for Non-Employee Directors. The transaction code is "A" for acquisition, and the ownership nature is "D" for direct ownership. The filing is made on Form 4 and was signed on October 2, 2026.