Sirenia Capital Management LP Discloses New 9.9% Stake in Xilio Therapeutics, Inc.

On May 15, 2026, Sirenia Capital Management LP and Alex Silverstein filed a Schedule 13G disclosing a new 9.9% stake in Xilio Therapeutics, Inc. (XLO). The reporting persons beneficially own 1,142,862 shares of Common Stock, which includes 857,148 shares issuable upon the exercise of warrants held in a managed account for Point72 Associates II, LLC. The reported ownership percentage is capped at 9.9% due to a 9.99% blocker provision within the warrant agreements, which prevents the reporting persons from exercising warrants if such action would result in exceeding that ownership threshold. Alex Silverstein, as the managing member of Sirenia Capital Management GP LLC, shares voting and dispositive power over these securities. The filing indicates that the shares were acquired in the ordinary course of business and not for the purpose of changing or influencing control of the issuer. The principal business office for the reporting persons is located in Miami Beach, Florida.