Akintunde Olatokumbo Bello - Jun 10, 2025 Form 4 Insider Report for Xilio Therapeutics, Inc. (XLO)

Role: Director
Signature: /s/ Elana Brockmann, Attorney-in-Fact
Stock symbol: XLO
Transactions as of: Jun 10, 2025
Transactions value $: $0
Form type: 4
Date filed: 6/12/2025, 04:34 PM
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Bello Akintunde Olatokumbo	Director	828 WINTER STREET, SUITE 300, WALTHAM	/s/ Elana Brockmann, Attorney-in-Fact	2025-06-12	0002070709

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
transaction	XLO	Stock Option (right to buy)	Award	$0	+62K		$0.00	62K	Jun 10, 2025	Common Stock	62K	$0.70	Direct	F1

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	The option was granted on June 10, 2025 and will vest in three equal installments on June 10, 2026, June 10, 2027 and June 10, 2028, subject to the Reporting Person's continued service to the Issuer through the applicable vesting date.