Form 4 Filing for Dion J. Weisler

Dion J. Weisler, a director at THERMO FISHER SCIENTIFIC INC. (TMO), acquired 55.56 Phantom Stock Units on September 26, 2026. These units are convertible into Common Stock on a 1-for-1 basis and were credited to his account under the company's Deferred Compensation Plan for Directors. The units were valued at $675.00 each as of the quarter end. The shares are distributable upon cessation of director service or a change of control. Following this transaction, Weisler holds 2846.55 Phantom Stock Units.