Who owns ALX Oncology Holdings Inc.?
Institutional ownership of ALXO from SEC Form 13F filings across 65 reporting managers. All positions are from one synchronized reporting period — 2026-06-30 books, filed up to 45 days after quarter end — so every row is comparable.
65
13F holders
$97.8M
value, 2026 filers
36.1%
of shares outstanding (48.6M sh)
28
new positions (2026 filers)
Top institutional holders
ordered by shares owned · positions as of 2026-06-30· % of fund = share of the manager's own book · % of co. = share of ALXO's shares outstanding
| # | Manager | Shares | Value | % of fund | % of co. | Δ shares QoQ |
|---|---|---|---|---|---|---|
| 1 | BlackRock, Inc. | 7.4M | $15.3M | 0.0% | 5.5% | +1552.4% |
| 2 | Blackstone Inc. | 6.6M | $13.6M | 0.0% | 4.9% | +13.2% |
| 3 | SILVERARC CAPITAL MANAGEMENT, LLCNEW | 5.7M | $11.9M | 1.2% | 4.3% | new |
| 4 | TCG Crossover Management, LLC | 5.7M | $11.7M | 0.3% | 4.2% | -56.5% |
| 5 | VANGUARD CAPITAL MANAGEMENT LLC | 5.0M | $10.3M | 0.0% | 3.7% | -40.5% |
| 6 | MARSHALL WACE, LLP | 3.1M | $6.4M | 0.0% | 2.3% | -18.3% |
| 7 | GEODE CAPITAL MANAGEMENT, LLC | 2.8M | $5.8M | 0.0% | 2.1% | +465.0% |
| 8 | TWO SIGMA INVESTMENTS, LP | 2.2M | $4.5M | 0.0% | 1.6% | +37.2% |
| 9 | MILLENNIUM MANAGEMENT LLC | 1.5M | $3.2M | 0.0% | 1.1% | -22.4% |
| 10 | ACADIAN ASSET MANAGEMENT LLC | 1.3M | $2,713 | 0.0% | 1% | +19.3% |
| 11 | JPMORGAN CHASE & CO | 1.0M | $2.3M | 0.0% | 0.8% | +1055180.8% |
| 12 | NORTHERN TRUST CORP | 935,669 | $1.9M | 0.0% | 0.7% | +583.1% |
| 13 | VANGUARD PORTFOLIO MANAGEMENT LLC | 749,229 | $1.6M | 0.0% | 0.6% | +665.4% |
| 14 | VANGUARD FIDUCIARY TRUST CO | 743,491 | $1.5M | 0.0% | 0.6% | +152.5% |
| 15 | GOLDMAN SACHS GROUP INC | 742,331 | $1.5M | 0.0% | 0.6% | +435.6% |
| 16 | UBS Group AG | 462,943 | $958,292 | 0.0% | 0.3% | -49.4% |
| 17 | Sixth Street Partners Management Company, L.P.NEW | 241,113 | $499,104 | 0.1% | 0.2% | new |
| 18 | CHARLES SCHWAB INVESTMENT MANAGEMENT INCNEW | 241,113 | $499,104 | 0.0% | 0.2% | new |
| 19 | Bank of New York Mellon CorpNEW | 238,447 | $493,585 | 0.0% | 0.2% | new |
| 20 | IEQ CAPITAL, LLC | 175,382 | $363,041 | 0.0% | 0.1% | +90.2% |
| 21 | MORGAN STANLEY | 157,873 | $326,798 | 0.0% | 0.1% | +59.7% |
| 22 | Invesco Ltd. | 149,923 | $310,341 | 0.0% | 0.1% | +1265.4% |
| 23 | Nuveen, LLCNEW | 143,645 | $297,345 | 0.0% | 0.1% | new |
| 24 | SUSQUEHANNA INTERNATIONAL GROUP, LLP | 123,157 | $254,935 | 0.0% | 0.1% | -90.7% |
| 25 | RHUMBLINE ADVISERSNEW | 107,902 | $223,350 | 0.0% | 0.1% | new |
Source: SEC Form 13F-HR filings (institutional managers over $100M in US-listed positions). 13Fs disclose long positions only, up to 45 days after quarter end; each manager's latest filed quarter is shown per row and dollar values are the manager's filed marks. Aggregates labeled "2026 filers" count only managers whose latest book is a 2026 quarter. Related: valuation · options positioning · supply chain. Research, not investment advice.