Form 4 Filing for Gregory T. Moskoff

Gregory T. Moskoff, MD, Controller and CAO of FACTSET RESEARCH SYSTEMS INC (FDS), reported a transaction on 2026-09-23 involving 97 Performance Share Units (PSUs) related to Common Stock. These PSUs were earned upon achievement of performance goals and are scheduled to vest on November 1, 2026, provided employment continues. The transaction code was "A" for acquisition, with a price of 0.0. Following the transaction, Mr. Moskoff owns 97 PSUs.