0001104659-21-128649.txt : 20211021 0001104659-21-128649.hdr.sgml : 20211021 20211021205226 ACCESSION NUMBER: 0001104659-21-128649 CONFORMED SUBMISSION TYPE: 3 PUBLIC DOCUMENT COUNT: 1 CONFORMED PERIOD OF REPORT: 20211021 FILED AS OF DATE: 20211021 DATE AS OF CHANGE: 20211021 REPORTING-OWNER: OWNER DATA: COMPANY CONFORMED NAME: CLACKSON TIMOTHY P CENTRAL INDEX KEY: 0001242992 FILING VALUES: FORM TYPE: 3 SEC ACT: 1934 Act SEC FILE NUMBER: 001-40925 FILM NUMBER: 211338465 MAIL ADDRESS: STREET 1: C/O ARIAD PHARMACEUTICALS INC STREET 2: 26 LANDSDOWNE STREET CITY: CAMBRIDGE STATE: MA ZIP: 02139 ISSUER: COMPANY DATA: COMPANY CONFORMED NAME: Xilio Therapeutics, Inc. CENTRAL INDEX KEY: 0001840233 STANDARD INDUSTRIAL CLASSIFICATION: PHARMACEUTICAL PREPARATIONS [2834] IRS NUMBER: 851623397 STATE OF INCORPORATION: DE FISCAL YEAR END: 1231 BUSINESS ADDRESS: STREET 1: 828 WINTER STREET CITY: WALTHAM STATE: MA ZIP: 02451 BUSINESS PHONE: 617-833-1027 MAIL ADDRESS: STREET 1: 828 WINTER STREET CITY: WALTHAM STATE: MA ZIP: 02451 3 1 tm2130646-17_3seq1.xml OWNERSHIP DOCUMENT X0206 3 2021-10-21 0 0001840233 Xilio Therapeutics, Inc. XLO 0001242992 CLACKSON TIMOTHY P C/O XILIO THERAPEUTICS, INC. 828 WINTER STREET, SUITE 300 WALTHAM, MA 02451 0 0 1 0 Common Stock 20068 D Common Stock 70888 I The Timothy P. Clackson Irrevocable GST Trust of 2020 Stock Option (right to buy) 5.51 2022-01-15 Common Stock 7525 D Stock Option (right to buy) 5.51 2022-01-15 Common Stock 2776 D Stock Option (right to buy) 5.51 2022-01-15 Common Stock 5281 D Stock Option (right to buy) 5.89 2022-01-15 Common Stock 5213 D The option was granted on July 23, 2020 for 32,846 shares. On May 21, 2019, 25% of the shares underlying the option vested and the remaining shares shall vest in equal monthly installments until May 21, 2022. The option was granted on July 23, 2020 for 11,104 shares. On June 14, 2020, 25% of the shares underlying the option vested and the remainder shall vest in equal monthly installments thereafter until June 14, 2023. The option was granted on July 23, 2020 for 23,045 shares. The shares began vesting on March 12, 2020 and shall vest in equal monthly installments until February 12, 2024. The option was granted on March 11, 2021 for 35,752 shares. The shares underlying the option began vesting on April 1, 2021 and shall vest in equal monthly installments thereafter until March 1, 2025. /s/ Timothy Clackson 2021-10-21