XLO · Xilio Therapeutics, Inc. · Holdings

$8.93 +0.00 (+0.00%) At close · Sep 11

Market Cap

$51.64M

5.78M

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

Use institutional holdings through the 13F API or MCP →

Quarter:

Holders: 26

Total Value: $32,638,867

Total Shares: 3,406,981

Institutional Ownership Trend

19 quarters

Holder Concentration

Across 26 13F filers · Δ vs Mar 31, 2026

Top Holder

19.5%

−5.9 pts

Top 5

75.0%

−1.8 pts

Top 10

93.0%

+1.3 pts

HHI

1,322

Broadly held−312

Quarterly Activity

vs Mar 31, 2026

New

Increased

Decreased

Sold Out

Unchanged

Holder count: +2

Institutional value: +48.2%

Shares held: +30.1%

Top Buyers

vs Mar 31, 2026

Institution	Added	Now Holds
Small Stonepine Capital Management, LLC	+161,832	225,994
Mega VANGUARD CAPITAL MANAGEMENT LLC	+54,857	178,517
Large RENAISSANCE TECHNOLOGIES LLC	+14,587	64,153
Mega GEODE CAPITAL MANAGEMENT, LLC	+1,858	39,055

Top Sellers

vs Mar 31, 2026

Institution	Sold	Now Holds
Mega VANGUARD FIDUCIARY TRUST CO	−5,881	22,594
Mega UBS Group AG	−4,024	14
Mid GSA CAPITAL PARTNERS LLP	−3,356	13,590
Mega MORGAN STANLEY	−539	56,954

Top New Positions

vs Mar 31, 2026

Institution	Acquired	Value (USD)
Mid ORBIMED ADVISORS LLC	592,300	$5,674,234
Large ADAGE CAPITAL PARTNERS GP, L.L.C.	111,541	$1,068,562
Mega CITADEL ADVISORS LLC	25,950	$248,601
Mid BRIDGEWAY CAPITAL MANAGEMENT, LLC	17,544	$168,071
Mega TWO SIGMA INVESTMENTS, LP	14,544	$139,331

Top Sold-Out Positions

vs Mar 31, 2026

Institution	Previously Held	Last Value (USD)
Mid Caligan Partners LP	112,128	$942,996
Micro AJU IB Investment Co., Ltd.	47,695	$401,114
Mega FMR LLC	36,558	$307,452
Mid Ghisallo Capital Management LLC	13,800	$116,058
Large CWM, LLC	4,206	$35,372

Filter: New 10 Increased 4 Reduced 4 Sold out 8 Unchanged 8

Showing 26 of 26

All Common Calls Puts

Compact Export CSV

Holder

Value (USD)

% of 13F

Bain Capital Life Sciences Investors, LLC

$6,361,321

19.49%

664,021

GILEAD SCIENCES, INC.

$6,230,726

19.09%

650,389

ORBIMED ADVISORS LLC

$5,674,234

17.38%

592,300

Frazier Life Sciences Management, L.P.

$4,047,597

12.40%

422,505

Stonepine Capital Management, LLC

$2,165,022

6.63%

225,994

VANGUARD CAPITAL MANAGEMENT LLC

$1,710,192

5.24%

178,517

Sio Capital Management, LLC

$1,460,605

4.48%

152,464

ADAGE CAPITAL PARTNERS GP, L.L.C.

$1,068,562

3.27%

111,541

Merck & Co., Inc.

$1,015,307

3.11%

105,982

RENAISSANCE TECHNOLOGIES LLC

$614,585

1.88%

64,153

MORGAN STANLEY

$545,619

1.67%

56,954

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
MORGAN STANLEY SMITH BARNEY LLC	56,954	$545,619	100.0%	Defined

GEODE CAPITAL MANAGEMENT, LLC

$374,146

1.15%

39,055

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
GEODE CAPITAL MANAGEMENT TRUST COMPANY, LLC	6,532	$62,576	16.7%	Defined
Held directly	32,523	$311,570	83.3%	Defined

CITADEL ADVISORS LLC

$248,601

0.76%

25,950

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Citadel Securities GP LLC	25,950	$248,601	100.0%	Defined

VANGUARD FIDUCIARY TRUST CO

$216,450

0.66%

22,594

BRIDGEWAY CAPITAL MANAGEMENT, LLC

$168,071

0.51%

17,544

TWO SIGMA INVESTMENTS, LP

$139,331

0.43%

14,544

Velan Capital Investment Management LP

$136,850

0.42%

14,285

GSA CAPITAL PARTNERS LLP

$130,192

0.40%

13,590

STATE STREET CORP

$127,519

0.39%

13,311

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
STATE STREET GLOBAL ADVISORS TRUST COMPANY	13,311	$127,519	100.0%	Defined

PRELUDE CAPITAL MANAGEMENT, LLC

$111,128

0.34%

11,600

BlackRock, Inc.

$83,892

0.26%

8,757

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
BlackRock Investment Management, LLC	538	$5,154	6.1%	Sole
BlackRock Fund Advisors	8,219	$78,738	93.9%	Sole

Steward Partners Investment Advisory, LLC

$6,840

0.02%

714

BARCLAYS PLC

$1,101

0.00%

115

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
BARCLAYS CAPITAL INC.	115	$1,101	100.0%	Defined

Key Financial Inc

$565

0.00%

JONES FINANCIAL COMPANIES LLLP

$277

0.00%

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Edward D. Jones & Co., L.P.	29	$277	100.0%	Sole

UBS Group AG

$134

0.00%

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
UBS AG	14	$134	100.0%	Defined

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Impresa Management LLC	36,558	$307,452	100.0%	Defined

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
J.P. Morgan Securities LLC	240	$2,018	100.0%	Defined

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
RBC Capital Markets, LLC	91	$765	100.0%	Defined

Key facts CIK 1840233 CUSIP 98422T209 13F (30d) 13 filings 13 filers Visit website Investor relations