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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1840233	Xilio Therapeutics Inc.	XLO	()	DE

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1725443	Rivervest Venture Fund Iv, L.p.	101 S. Hanley Road, Suite 1850 St. Louis MO 63105		No	No	Yes	No

Reported Non-Derivative Transactions

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
Common Stock	Acquisiton	2021-10-26	832,120	$0.00	832,120	No	4	C	Indirect	See Footnotes
Common Stock	Acquisiton	2021-10-26	359,324	$0.00	1,191,444	No	4	C	Indirect	See Footnotes
Common Stock	Acquisiton	2021-10-26	250,000	$16.00	1,441,444	No	4	P	Indirect	See Footnotes

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	C	Indirect	See Footnotes
No	4	C	Indirect	See Footnotes
No	4	P	Indirect	See Footnotes

Reported Derivative Transactions

Sec. Name	Sec. Type	Acquisiton - Disposition	Date	Amount	Price	Amount - 2	Price - 2
Common Stock	Series B Preferred Stock	Disposition	2021-10-26	832,120	$0.00	832,120	$0.00
Common Stock	Series B Preferred Stock	Disposition	2021-10-26	359,324	$0.00	359,324	$0.00

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
0			No	4	C	Indirect
0			No	4	C	Indirect

Footnotes

Each share of Series B Preferred Stock and Series C Preferred Stock automatically converted into 1 share of the Issuer's common stock upon the closing of the Issuer's initial public offering on October 26, 2021. The shares have no expiration date.
The shares held by RiverVest Venture Fund IV, L.P. ("RiverVest IV") are indirectly held by RiverVest Venture Partners IV, L.P. ("RiverVest Partners IV"), which is the general partner of RiverVest IV. RiverVest Venture Partners IV, LLC is the general partner of RiverVest Partners IV.
The individual managers of RiverVest Ventures Partners IV, LLC are Jay Schmelter, John P. McKearn, Ph.D. and Niall O'Donnell. RiverVest Partners IV, RiverVest Venture Partners IV, LLC and each of the individual managers share voting and dispositive power with regard to the securities directly held by RiverVest Venture Fund IV, L.P.
RiverVest IV purchased the shares in the Issuer's initial public offering.