ALXO · Alx Oncology Holdings Inc · Shareholders & Ownership
Every disclosed holder of ALXO 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 ALXO
13F quarter Sep 30, 2026, combined view: filers that have not filed yet carry their Jun 30, 2026 positions| Holder group | Shares | % Out |
|---|---|---|
| Institutional (13F) | 105,189,888 | 76.07% |
| Insiders (Forms 3, 4, 5) | 1,243,678 | 0.90% |
| 13D/G-only blocks | 25,213,092 | 18.23% |
| Remaining | 6,630,339 | 4.80% |
| Registered funds (N-PORT, not summed) | 13,127,965 | 9.49% |
Shares outstanding: 138,276,997, the issuer's latest cover-page count restated onto today's split basis.
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 ALXO
| # | Holder | Shares | As of | Notes |
|---|---|---|---|---|
| 1 |
RA CAPITAL MANAGEMENT, L.P.
13F
CIK 1346824 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
13,011,849 | ||
| 2 |
venBio Partners LLC
13F
CIK 1776382 · Exempt reporting adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
12,884,638 | ||
| 3 |
HBM Healthcare Investments (Cayman) Ltd.
13G
CIK 1232258 · Unknown · Mar 31, 2026
Rule 13d-1(c), passive investor
|
8,590,692 | ||
| 4 |
BlackRock, Inc.
13F
CIK 2012383 · Holding company · Jun 30, 2026
carried, not yet filed for the newest quarter
|
7,399,530 | ||
| 4.1 |
BlackRock, Inc.
13G
CIK 2012383 · Holding company · Jun 30, 2026
Rule 13d-1(b), qualified institution, not summed
|
7,327,850 | ||
| 4.2 |
iShares Russell 2000 ETF
Fund
S000004344 · Registered fund · Jun 30, 2026
iShares Trust, not summed
|
2,598,748 | ||
| 4.3 |
iShares Russell 2000 Growth ETF
Fund
S000004343 · Registered fund · Jun 30, 2026
iShares Trust, not summed
|
1,013,254 | ||
| 4.4 |
iShares Micro-Cap ETF
Fund
S000004439 · Registered fund · Jun 30, 2026
iShares Trust, not summed
|
361,777 | ||
| 4.5 |
Master Small Cap Index Series
Fund
S000002716 · Registered fund · Jun 30, 2026
Quantitative Master Series LLC, not summed
|
201,688 | ||
| 5 |
Redmile Group, LLC
13F
CIK 1425738 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
7,392,504 | ||
| 6 |
Blackstone Inc.
13F
CIK 1393818 · Investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
6,593,543 | ||
| 7 |
Driehaus Capital Management LLC
13F
CIK 938206 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
6,025,240 | ||
| 8 |
SILVERARC CAPITAL MANAGEMENT, LLC
13F
CIK 1816307 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
5,744,757 | ||
| 9 |
|
5,655,487 | ||
| 10 |
TCG Crossover Management, LLC
13F
CIK 1839948 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
|
5,655,487 | ||
| 11 |
VANGUARD CAPITAL MANAGEMENT LLC
13F
CIK 2100119 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
4,973,436 | ||
| 12 |
|
4,307,034 | ||
| 13 |
VANGUARD TOTAL STOCK MARKET INDEX FUND
Fund
S000002848 · Registered fund · Jun 30, 2026
VANGUARD INDEX FUNDS, not summed
|
3,642,854 | ||
| 14 |
TANG CAPITAL MANAGEMENT, LLC
13G
CIK 1191935 · Unknown · Dec 31, 2024
Rule 13d-1(c), passive investor
|
3,296,883 | ||
| 15 |
Vivo Capital, LLC
13F
CIK 1674712 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
3,184,713 | ||
| 16 |
MARSHALL WACE, LLP
13F
CIK 1318757 · Exempt reporting adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
3,071,496 | ||
| 17 |
5AM Venture Management, LLC
13F
CIK 1799883 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
3,057,325 | ||
| 18 |
Almitas Capital LLC
13F
CIK 1596468 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
2,938,431 | ||
| 19 |
ORBIMED ADVISORS LLC
13F
CIK 1055951 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
2,866,256 | ||
| 20 |
GEODE CAPITAL MANAGEMENT, LLC
13F
CIK 1214717 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
2,787,809 | ||
| 21 |
TWO SIGMA INVESTMENTS, LP
13F
CIK 1179392 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
2,178,176 | ||
| 22 |
|
1,813,864 | ||
| 23 |
LSV Associates, LLC
13D
CIK 1643828 · Unknown · May 27, 2026
Item 4 purpose: not restated by this amendment, the earlier 13D's purpose stands
|
1,549,132 | ||
| 24 |
MILLENNIUM MANAGEMENT LLC
13F
CIK 1273087 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
1,543,594 | ||
| 25 |
|
1,498,905 | ||
| 25.1 |
STATE STREET SMALL/MID CAP EQUITY INDEX PORTFOLIO
Fund
S000050332 · Registered fund · Jun 30, 2026
STATE STREET INSTITUTIONAL INVESTMENT TRUST, not summed
|
45,100 | ||
| 25.2 |
State Street Total Return V.I.S. Fund
Fund
S000001637 · Registered fund · Jun 30, 2026
STATE STREET VARIABLE INSURANCE SERIES FUNDS INC, not summed
|
2,724 | ||
| 26 |
ACADIAN ASSET MANAGEMENT LLC
13F
CIK 916542 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
|
1,313,490 | ||
| 27 |
VANGUARD EXTENDED MARKET INDEX FUND
Fund
S000002841 · Registered fund · Jun 30, 2026
VANGUARD INDEX FUNDS, not summed
|
1,164,899 | ||
| 28 |
JPMORGAN CHASE & CO
13F
CIK 19617 · Bank · Jun 30, 2026
carried, not yet filed for the newest quarter
|
1,044,728 | ||
| 29 |
NORTHERN TRUST CORP
13F
CIK 73124 · Bank · Jun 30, 2026
carried, not yet filed for the newest quarter
|
935,669 | ||
| 29.1 |
Small Cap Index Fund
Fund
S000001245 · Registered fund · Jun 30, 2026
Northern Funds, not summed
|
56,054 | ||
| 29.2 |
Small Cap Core Fund
Fund
S000001244 · Registered fund · Jun 30, 2026
Northern Funds, not summed
|
15,752 | ||
| 30 |
Ensign Peak Advisors, Inc
13F
CIK 1454984 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
|
810,297 | ||
| 31 |
Nantahala Capital Management, LLC
13F
CIK 1472322 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
750,000 | ||
| 32 |
VANGUARD PORTFOLIO MANAGEMENT LLC
13F
CIK 2100121 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
749,229 | ||
| 33 |
VANGUARD FIDUCIARY TRUST CO
13F
CIK 933478 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
|
743,491 | ||
| 34 |
GOLDMAN SACHS GROUP INC
13F
CIK 886982 · Holding company · Jun 30, 2026
carried, not yet filed for the newest quarter
|
742,331 | ||
| 34.1 |
Goldman Sachs Small Cap Growth Insights Fund
Fund
S000014930 · Registered fund · Jul 31, 2026
Goldman Sachs Trust, not summed
|
83,966 | ||
| 34.2 |
Goldman Sachs Variable Insurance Trust Small Cap Equity Insights Fund
Fund
S000009355 · Registered fund · Jun 30, 2026
Goldman Sachs Variable Insurance Trust, not summed
|
12,550 | ||
| 35 |
RENAISSANCE TECHNOLOGIES LLC
13F
CIK 1037389 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
603,797 | ||
| 36 |
|
579,388 | ||
| 37 |
ADAR1 Capital Management, LLC
13F
CIK 1940272 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
533,660 | ||
| 38 |
|
462,943 | ||
| 39 |
GSA CAPITAL PARTNERS LLP
13F
CIK 1362033 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
413,545 | ||
| 40 |
JPMorgan U.S. Small Company Fund
Fund
S000002795 · Registered fund · Jun 30, 2026
JPMorgan Trust I, not summed
|
393,960 | ||
| 41 |
|
294,379 | ||
| 42 |
CHARLES SCHWAB INVESTMENT MANAGEMENT INC
13F
CIK 884546 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
241,113 | ||
| 42.1 |
Schwab Small-Cap Index Fund
Fund
S000005912 · Registered fund · Jul 31, 2026
SCHWAB CAPITAL TRUST, not summed
|
260,212 | ||
| 43 |
Bank of New York Mellon Corp
13F
CIK 1390777 · Bank · Jun 30, 2026
carried, not yet filed for the newest quarter
|
238,447 | ||
| 44 |
BRIDGEWAY CAPITAL MANAGEMENT, LLC
13F
CIK 1107261 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
226,072 | ||
| 44.1 |
Ultra-Small Company Market Fund
Fund
S000004424 · Registered fund · Jun 30, 2026
Bridgeway Funds, Inc., not summed
|
211,000 | ||
| 44.2 |
Ultra-Small Company Fund
Fund
S000004423 · Registered fund · Jun 30, 2026
Bridgeway Funds, Inc., not summed
|
15,072 | ||
| 45 |
Atom Investors LP
13F
CIK 1738902 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
219,382 | ||
| 46 |
IEQ CAPITAL, LLC
13F
CIK 1779789 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
175,382 | ||
| 47 |
MORGAN STANLEY
13F
CIK 895421 · Holding company · Jun 30, 2026
carried, not yet filed for the newest quarter
|
157,873 | ||
| 48 |
Invesco Ltd.
13F
CIK 914208 · Investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
149,923 | ||
| 48.1 |
Invesco RAFI US 1500 Small-Mid ETF
Fund
S000013120 · Registered fund · Jul 31, 2026
Invesco Exchange-Traded Fund Trust, not summed
|
35,672 | ||
| 49 |
|
143,645 | ||
| 49.1 |
Nuveen Small Cap Blend Index Fund
Fund
S000005367 · Registered fund · Jul 31, 2026
TIAA-CREF Funds, not summed
|
143,645 | ||
| 50 |
SUSQUEHANNA INTERNATIONAL GROUP, LLP
13F
CIK 1446194 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
|
123,157 |
3 more nested rows are not shown here; Every filing lists them all.
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.
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