XLO · Xilio Therapeutics, Inc. · Shareholders & Ownership
Market Cap
$50.60M
Shares
5.78M
Volume · Oct 21
36.27K
Avg daily vol (3M)
13.53K
Every disclosed holder of XLO in one list: 13F institutions, Schedule 13D and 13G filers, insiders (Forms 3, 4 and 5) and registered funds, each from its own latest filing. Holders nest by CIK and SEC reporting links, never by name, and each is summed once.
Who Owns XLO
13F quarter Jun 30, 2026No chart: the summed disclosures exceed shares outstanding, so they are not parts of one whole.
| Holder group | Shares | % Out |
|---|---|---|
| Institutional (13F) | 3,407,302 | 58.92% |
| Insiders (Forms 3, 4, 5) | 37,843 | 0.65% |
| 13D/G-only blocks | 3,298,183 | 57.04% |
| Remaining | 960,817 | -16.62% |
| Registered funds (N-PORT, not summed) | 242,280 | 4.19% |
Shares outstanding: 5,782,511, the issuer's latest cover-page count restated onto today's split basis.
Remaining is negative: the summed disclosures exceed shares outstanding, as when filings are dated at different times or holders that do not disclose their links count the same shares. It is flagged, not clipped.
13D/G-only counts each filer's latest 13D or 13G that no 13F report of the listing contains, that names no 13F filer and that no counted insider files. Funds are never summed: their shares sit inside their advisers' 13F reports.
Holders of XLO
| # | Holder | Shares | As of | Notes |
|---|---|---|---|---|
| 1 |
Sirenia Capital Management LP
13G
CIK 2115022 · Registered investment adviser · Mar 31, 2026
Rule 13d-1(b), qualified institution
|
1,142,862 | ||
| 2 |
Bain Capital Life Sciences Investors, LLC
13F
CIK 1703031 · Unknown · Jun 30, 2026
|
664,021 | ||
| 3 |
GILEAD SCIENCES, INC.
13F
CIK 882095 · Unknown · Jun 30, 2026
|
650,389 | ||
| 3.1 |
|
650,389 | ||
| 4 |
STEMPOINT CAPITAL LP
13G
CIK 1952142 · Registered investment adviser · Jun 30, 2026
Rule 13d-1(b), qualified institution
|
628,866 | ||
| 5 |
ORBIMED ADVISORS LLC
13F
CIK 1055951 · Registered investment adviser · Jun 30, 2026
|
592,300 | ||
| 6 |
|
500,000 | ||
| 7 |
Frazier Life Sciences Management, L.P.
13F
CIK 1892134 · Registered investment adviser · Jun 30, 2026
|
422,505 | ||
| 8 |
Coastlands Capital LP
13G
CIK 2068530 · Investment adviser · Dec 4, 2025
Rule 13d-1(b), qualified institution
|
381,862 | ||
| 9 |
|
334,034 | ||
| 10 |
|
310,559 | ||
| 11 |
Stonepine Capital Management, LLC
13F
CIK 1440771 · Registered investment adviser · Jun 30, 2026
|
225,994 | ||
| 12 |
VANGUARD CAPITAL MANAGEMENT LLC
13F
CIK 2100119 · Registered investment adviser · Jun 30, 2026
|
178,517 | ||
| 13 |
Sio Capital Management, LLC
13F
CIK 1482416 · Investment adviser · Jun 30, 2026
|
152,464 | ||
| 14 |
VANGUARD TOTAL STOCK MARKET INDEX FUND
Fund
S000002848 · Registered fund · Jun 30, 2026
VANGUARD INDEX FUNDS, not summed
|
142,440 | ||
| 15 |
ADAGE CAPITAL PARTNERS GP, L.L.C.
13F
CIK 1165408 · Registered investment adviser · Jun 30, 2026
|
111,541 | ||
| 16 |
Merck & Co., Inc.
13F
CIK 310158 · Unknown · Jun 30, 2026
|
105,982 | ||
| 17 |
RENAISSANCE TECHNOLOGIES LLC
13F
CIK 1037389 · Registered investment adviser · Jun 30, 2026
|
64,153 | ||
| 18 |
MORGAN STANLEY
13F
CIK 895421 · Holding company · Jun 30, 2026
|
56,954 | ||
| 19 |
GEODE CAPITAL MANAGEMENT, LLC
13F
CIK 1214717 · Registered investment adviser · Jun 30, 2026
|
39,055 | ||
| 20 |
VANGUARD EXTENDED MARKET INDEX FUND
Fund
S000002841 · Registered fund · Jun 30, 2026
VANGUARD INDEX FUNDS, not summed
|
35,606 | ||
| 21 |
CITADEL ADVISORS LLC
13F
CIK 1423053 · Registered investment adviser · Jun 30, 2026
|
25,950 | ||
| 22 |
|
23,244 | ||
| 23 |
VANGUARD FIDUCIARY TRUST CO
13F
CIK 933478 · Unknown · Jun 30, 2026
|
22,594 | ||
| 24 |
Fidelity Extended Market Index Fund
Fund
S000006021 · Registered fund · May 31, 2026
Fidelity Concord Street Trust, not summed
|
19,824 | ||
| 25 |
BRIDGEWAY CAPITAL MANAGEMENT, LLC
13F
CIK 1107261 · Registered investment adviser · Jun 30, 2026
|
17,544 | ||
| 25.1 |
Ultra-Small Company Fund
Fund
S000004423 · Registered fund · Jun 30, 2026
Bridgeway Funds, Inc., not summed
|
17,544 | ||
| 26 |
TWO SIGMA INVESTMENTS, LP
13F
CIK 1179392 · Registered investment adviser · Jun 30, 2026
|
14,544 | ||
| 27 |
Velan Capital Investment Management LP
13F
CIK 1848809 · Registered investment adviser · Jun 30, 2026
|
14,285 | ||
| 28 |
GSA CAPITAL PARTNERS LLP
13F
CIK 1362033 · Registered investment adviser · Jun 30, 2026
|
13,590 | ||
| 29 |
STATE STREET CORP
13F
CIK 93751 · Bank · Jun 30, 2026
|
13,311 | ||
| 30 |
PRELUDE CAPITAL MANAGEMENT, LLC
13F
CIK 1387508 · Registered investment adviser · Jun 30, 2026
|
11,600 | ||
| 31 |
|
10,000 | ||
| 32 |
BlackRock, Inc.
13F
CIK 2012383 · Holding company · Jun 30, 2026
|
8,757 | ||
| 32.1 |
iShares Micro-Cap ETF
Fund
S000004439 · Registered fund · Jun 30, 2026
iShares Trust, not summed
|
8,219 | ||
| 33 |
Fidelity Series Total Market Index Fund
Fund
S000065248 · Registered fund · May 31, 2026
Fidelity Concord Street Trust, not summed
|
7,476 | ||
| 34 |
Fidelity Total Market Index Fund
Fund
S000006026 · Registered fund · May 31, 2026
Fidelity Concord Street Trust, not summed
|
4,514 | ||
| 35 |
Fidelity Nasdaq Composite Index Fund
Fund
S000055366 · Registered fund · May 31, 2026
Fidelity Concord Street Trust, not summed
|
2,768 | ||
| 36 |
|
2,375 | ||
| 37 |
Frankenfield Christopher James
Insider
CIK 1988344 · Jan 2, 2026
Chief Financial Officer, issuer-wide
|
1,769 | ||
| 38 |
U.S. VECTOR EQUITY PORTFOLIO
Fund
S000000982 · Registered fund · Jul 31, 2026
DFA INVESTMENT DIMENSIONS GROUP INC, not summed
|
1,507 | ||
| 39 |
Dimensional US Core Equity 1 ETF
Fund
S000081780 · Registered fund · Jul 31, 2026
Dimensional ETF Trust, not summed
|
1,116 | ||
| 40 |
Steward Partners Investment Advisory, LLC
13F
CIK 1723397 · Registered investment adviser · Jun 30, 2026
|
714 | ||
| 41 |
1290 VT Micro Cap Portfolio
Fund
S000044688 · Registered fund · Jun 30, 2026
EQ Advisors Trust, not summed
|
538 | ||
| 42 |
VANGUARD BALANCED INDEX FUND
Fund
S000002560 · Registered fund · Jun 30, 2026
VANGUARD VALLEY FORGE FUNDS, not summed
|
471 | ||
| 43 |
|
455 | ||
| 44 |
SECURITY NATIONAL BANK OF SIOUX CITY IOWA /IA/
13F
CIK 894309 · Unknown · Jun 30, 2026
|
321 | ||
| 45 |
Dimensional U.S. Core Equity 2 ETF
Fund
S000070903 · Registered fund · Jul 31, 2026
Dimensional ETF Trust, not summed
|
254 | ||
| 46 |
BARCLAYS PLC
13F
CIK 312069 · Bank · Jun 30, 2026
|
115 | ||
| 47 |
Key Financial Inc
13F
CIK 1801720 · Registered investment adviser · Jun 30, 2026
|
59 | ||
| 48 |
JONES FINANCIAL COMPANIES LLLP
13F
CIK 815917 · Unknown · Jun 30, 2026
|
29 | ||
| 49 |
UBS Group AG
13F
CIK 1610520 · Bank · Jun 30, 2026
|
14 | ||
| 50 |
Guggenheim Active Allocation Fund
Fund
· Registered fund · May 29, 2026
Guggenheim Active Allocation Fund, not summed
|
3 |
Shares are restated onto today's split basis. Change compares each row with the same holder's previous filing in the same source; a dash means there is none to compare. Nested 13D/G, insider and fund rows are not summed, since a 13F report already holds them.