X0508 4 2024-12-18 0001840233 Xilio Therapeutics, Inc. XLO 0000882095 GILEAD SCIENCES, INC. 333 LAKESIDE DRIVE FOSTER CITY CA 94404 0 0 1 0 0 Common Stock 2024-12-18 4 P 0 1759978 1.04 A 9105451 D Prefunded Warrants (right to buy) 0.0001 2024-12-18 4 P 0 6092816 1.0399 A Common Stock 6092816 9975266 D The Prefunded Warrants have no expiration date and are exercisable at any time on or after the date of issuance. A holder of Prefunded Warrants may not exercise the Prefunded Warrants if, after giving effect to such exercise, the holder and its affiliates would beneficially own, for purposes of Section 13(d) of the Securities Exchange Act of 1934, as amended, more than 19.99% of the outstanding shares of Common Stock of the Issuer. Gilead Sciences, Inc. By: /s/ Andrew D. Dickson 2024-12-19