WALTHAM, MA
XILIO THERAPEUTICS, INC.XLO— Latest position per institution from SEC 13F filings
15
Institutional holders
2.92M
Total shares held
27.71M
Estimated value
145.93K
Avg. position size
BAIN CAPITAL LIFE SCIENCES INVESTORS, LLC
CIK 1703031
Shares
664.02K
Value
6.36M
Filed
Jun 30, 2026
ORBIMED ADVISORS LLC
CIK 1055951
Shares
592.30K
Value
5.67M
Filed
Jun 30, 2026
FRAZIER LIFE SCIENCES MANAGEMENT, L.P.
CIK 1892134
Shares
422.50K
Value
4.05M
Filed
Jun 30, 2026
STONEPINE CAPITAL MANAGEMENT, LLC
CIK 1440771
Shares
225.99K
Value
2.17M
Filed
Jun 30, 2026
VANGUARD CAPITAL MANAGEMENT LLC
CIK 2100119
Shares
178.52K
Value
1.71M
Filed
Jun 30, 2026
SIO CAPITAL MANAGEMENT, LLC
CIK 1482416
Shares
152.46K
Value
1.46M
Filed
Jun 30, 2026
CALIGAN PARTNERS LP
CIK 1727492
Shares
112.13K
Value
943K
Filed
Mar 31, 2026
ADAGE CAPITAL PARTNERS GP, L.L.C.
CIK 1165408
Shares
111.54K
Value
1.07M
Filed
Jun 30, 2026
MERCK & CO., INC.
CIK 310158
Shares
105.98K
Value
1.02M
Filed
Jun 30, 2026
RENAISSANCE TECHNOLOGIES LLC
CIK 1037389
Shares
64.15K
Value
614.59K
Filed
Jun 30, 2026
MORGAN STANLEY
CIK 895421
Shares
56.95K
Value
545.62K
Filed
Jun 30, 2026
AJU IB INVESTMENT CO., LTD.
CIK 1710065
Shares
47.70K
Value
401.12K
Filed
Mar 31, 2026
GEODE CAPITAL MANAGEMENT, LLC
CIK 1214717
Shares
39.05K
Value
374.17K
Filed
Jun 30, 2026
FMR LLC
CIK 315066
Shares
36.56K
Value
307.45K
Filed
Mar 31, 2026
CITADEL ADVISORS LLC
CIK 1423053
Shares
25.95K
Value
248.60K
Filed
Jun 30, 2026
VANGUARD FIDUCIARY TRUST CO
CIK 933478
Shares
22.59K
Value
216.45K
Filed
Jun 30, 2026
BRIDGEWAY CAPITAL MANAGEMENT, LLC
CIK 1107261
Shares
17.54K
Value
168.07K
Filed
Jun 30, 2026
TWO SIGMA INVESTMENTS, LP
CIK 1179392
Shares
14.54K
Value
139.33K
Filed
Jun 30, 2026
VELAN CAPITAL INVESTMENT MANAGEMENT LP
CIK 1848809
Shares
14.29K
Value
136.85K
Filed
Jun 30, 2026
GHISALLO CAPITAL MANAGEMENT LLC
CIK 1825214
Shares
13.80K
Value
116.06K
Filed
Mar 31, 2026
| # | Institution | CIK | Shares | Est. Value | Period |
|---|---|---|---|---|---|
| 1 | BAIN CAPITAL LIFE SCIENCES INVESTORS, LLC | 1703031 | 664.02K | 6.36M | Jun 30, 2026 |
| 2 | ORBIMED ADVISORS LLC | 1055951 | 592.30K | 5.67M | Jun 30, 2026 |
| 3 | FRAZIER LIFE SCIENCES MANAGEMENT, L.P. | 1892134 | 422.50K | 4.05M | Jun 30, 2026 |
| 4 | STONEPINE CAPITAL MANAGEMENT, LLC | 1440771 | 225.99K | 2.17M | Jun 30, 2026 |
| 5 | VANGUARD CAPITAL MANAGEMENT LLC | 2100119 | 178.52K | 1.71M | Jun 30, 2026 |
| 6 | SIO CAPITAL MANAGEMENT, LLC | 1482416 | 152.46K | 1.46M | Jun 30, 2026 |
| 7 | CALIGAN PARTNERS LP | 1727492 | 112.13K | 943K | Mar 31, 2026 |
| 8 | ADAGE CAPITAL PARTNERS GP, L.L.C. | 1165408 | 111.54K | 1.07M | Jun 30, 2026 |
| 9 | MERCK & CO., INC. | 310158 | 105.98K | 1.02M | Jun 30, 2026 |
| 10 | RENAISSANCE TECHNOLOGIES LLC | 1037389 | 64.15K | 614.59K | Jun 30, 2026 |
| 11 | MORGAN STANLEY | 895421 | 56.95K | 545.62K | Jun 30, 2026 |
| 12 | AJU IB INVESTMENT CO., LTD. | 1710065 | 47.70K | 401.12K | Mar 31, 2026 |
| 13 | GEODE CAPITAL MANAGEMENT, LLC | 1214717 | 39.05K | 374.17K | Jun 30, 2026 |
| 14 | FMR LLC | 315066 | 36.56K | 307.45K | Mar 31, 2026 |
| 15 | CITADEL ADVISORS LLC | 1423053 | 25.95K | 248.60K | Jun 30, 2026 |
| 16 | VANGUARD FIDUCIARY TRUST CO | 933478 | 22.59K | 216.45K | Jun 30, 2026 |
| 17 | BRIDGEWAY CAPITAL MANAGEMENT, LLC | 1107261 | 17.54K | 168.07K | Jun 30, 2026 |
| 18 | TWO SIGMA INVESTMENTS, LP | 1179392 | 14.54K | 139.33K | Jun 30, 2026 |
| 19 | VELAN CAPITAL INVESTMENT MANAGEMENT LP | 1848809 | 14.29K | 136.85K | Jun 30, 2026 |
| 20 | GHISALLO CAPITAL MANAGEMENT LLC | 1825214 | 13.80K | 116.06K | Mar 31, 2026 |
Data sourced from SEC Form 13F institutional holdings reports. Positions reflect the most recent filing per institution.