Latest Period
Q1 2026
Security Snapshot
ALX ONCOLOGY HOLDINGS INC - Common Stock, par value $0.001 per share (ALXO) Institutional Ownership
CUSIP: 00166B105
13F Institutional Holders and Ownership History from Q3 2020 to Q1 2026
Institutions Reporting
69
Shares (Excl. Options)
94,268,933
Price
$2.00
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- Type / Class
- Equity / Common Stock, par value $0.001 per share
- Symbol
- ALXO on Nasdaq
- Shares outstanding
- 133,751,136
- Price per share
- $1.68
- All holders as of 31 Mar 2026
- Q1 2026
- Total 13F shares
- 94,268,933
- Total reported value
- $189,013,299
- % of total 13F portfolios
- 0%
- Share change
- +62,111,302
- Value change
- +$125,379,513
- Number of holders
- 69
- Price from insider filings
- $1.68
Reported Shares, Excluding Options vs Price
Reported Value, Excluding Options
Total Investors
Key facts
- ALXO - ALX ONCOLOGY HOLDINGS INC - Common Stock, par value $0.001 per share is tracked under CUSIP 00166B105.
- 69 institutions reported positions in Q1 2026.
- 9 significant owners is listed from Schedule 13D/13G reporting.
Change
- Holder count moved from 55 to 69 between Q4 2025 and Q1 2026.
- Reported value moved from $33,447,411 to $189,013,299.
Research use
- You can quickly see who holds this security, then open quarter and manager detail pages for full evidence.
- 13F and Schedule 13D/13G sections are kept together so you can cross-check institutional and beneficial ownership context.
Evidence
Source: SEC Form 13F
Open SEC Evidence
Latest holder context comes from 69 institutions filings for Q1 2026.
Security key
00166B105
Latest holder period
Q1 2026
13F holders
69
13D/G owners
9
CIK / CUSIP context first
Open Q1 2026 holders
ALXO full holder history
ALX ONCOLOGY HOLDINGS INC SEC filings
ALX ONCOLOGY HOLDINGS INC company facts
ALX ONCOLOGY HOLDINGS INC insider transactions
Broader feeds
Recent Quarterly Holder Reports
Open recent reporting periods for CUSIP 00166B105:
Significant Owners of ALX ONCOLOGY HOLDINGS INC - Common Stock, par value $0.001 per share (ALXO) based on Schedule 13D/G filings
| Filer | Ownership | Change % | Holdings Value | Net Change | Nb Shares | Change % | Reporting Name | Report Period |
|---|---|---|---|---|---|---|---|---|
| venBio Global Strategic Fund, L.P. | 10% | $14,547,038 | 13,163,549 | GOODMAN COREY S | 02 Feb 2026 | |||
| RA CAPITAL MANAGEMENT, L.P. | 9.9% | $16,265,211 | 13,117,106 | RA Capital Management, L.P. | 02 Feb 2026 | |||
| TCG Crossover GP II, LLC | 9.9% | $14,703,389 | 13,011,849 | Chen Yu | 30 Jan 2026 | |||
| Redmile Group, LLC | 6.8% | -19% | $18,474,447 | +$9,168,330 | 9,214,188 | +99% | Redmile Group, LLC | 31 Mar 2026 |
| HBM Healthcare Investments (Cayman) Ltd. | 6.5% | -24% | $17,224,337 | +$8,201,837 | 8,590,692 | +91% | HBM Healthcare Investments (Cayman) Ltd. | 31 Mar 2026 |
| TANG CAPITAL PARTNERS LP | 6.3% | $1,681,410 | 3,296,883 | TANG CAPITAL MANAGEMENT, LLC | 31 Dec 2024 | |||
| LSV Associates, LLC | 2.2% | $4,943,442 | 2,942,525 | Michael A Carusi | 27 May 2026 | |||
| MILLENNIUM MANAGEMENT LLC | 1.5% | -75% | $3,947,290 | -$2,381,279 | 1,988,559 | -38% | Millennium Management LLC | 31 Mar 2026 |
| FMR LLC | 3.4% | $917,426 | 1,798,875 | FMR LLC | 29 Nov 2024 |
As of 31 Mar 2026, 69 institutional investors reported holding 94,268,933 shares of ALX ONCOLOGY HOLDINGS INC - Common Stock, par value $0.001 per share (ALXO). This represents 70% of the company’s total 133,751,136 outstanding shares.
Top 25 Institutional Shareholders
The largest institutional shareholders of ALX ONCOLOGY HOLDINGS INC - Common Stock, par value $0.001 per share (ALXO) together control 69% of the company’s outstanding shares — a level of ownership often associated with strong institutional conviction and long‑term capital commitment.
| Institution | Ownership % | Shares Held | Share Change % | Portfolio % | Holdings Value |
|---|---|---|---|---|---|
| RA CAPITAL MANAGEMENT, L.P. | 9.7% | 13,011,849 | 0.28% | $26,088,757 | |
| TCG Crossover Management, LLC | 9.7% | 13,011,849 | 0.75% | $26,088,757 | |
| venBio Partners LLC | 9.6% | 12,884,638 | +33% | 9.2% | $25,833,699 |
| Redmile Group, LLC | 6% | 7,964,188 | +144% | 1.1% | $15,968,197 |
| Blackstone Inc. | 4.4% | 5,826,544 | 0.05% | $11,711,353 | |
| Driehaus Capital Management LLC | 4.3% | 5,734,620 | +303% | 0.08% | $11,497,913 |
| VANGUARD CAPITAL MANAGEMENT LLC | 3.1% | 4,179,736 | 0% | 0% | $8,380,371 |
| MARSHALL WACE, LLP | 2.8% | 3,757,216 | +14145% | 0.01% | $7,514,432 |
| Vivo Capital, LLC | 2.4% | 3,184,713 | 0.53% | $6,385,350 | |
| Almitas Capital LLC | 2.4% | 3,173,834 | +25% | 1.4% | $6,363,537 |
| 5AM Venture Management, LLC | 2.3% | 3,057,325 | 1.7% | $6,129,937 | |
| ORBIMED ADVISORS LLC | 2.1% | 2,866,256 | 0.13% | $5,746,843 | |
| ADAGE CAPITAL PARTNERS GP, L.L.C. | 1.5% | 2,000,000 | 0.01% | $4,010,000 | |
| MILLENNIUM MANAGEMENT LLC | 1.5% | 1,988,559 | -38% | 0% | $3,987,061 |
| TWO SIGMA INVESTMENTS, LP | 1.2% | 1,587,833 | +148% | 0% | $3,183,605 |
| Squadron Capital Management LLC | 1.1% | 1,460,000 | 1.2% | $2,927,300 | |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | 0.99% | 1,328,907 | +780% | 0% | $2,664,459 |
| ACADIAN ASSET MANAGEMENT LLC | 0.82% | 1,101,025 | -20% | 0% | $2,202,000 |
| Ensign Peak Advisors, Inc | 0.71% | 950,550 | 0% | $1,905,853 | |
| UBS Group AG | 0.68% | 914,754 | +5.6% | 0% | $1,834,082 |
| RENAISSANCE TECHNOLOGIES LLC | 0.55% | 732,599 | +73% | 0% | $1,468,861 |
| BANK OF AMERICA CORP /DE/ | 0.43% | 577,783 | +8.6% | 0% | $1,158,455 |
| GEODE CAPITAL MANAGEMENT, LLC | 0.37% | 493,437 | +40% | 0% | $989,757 |
| BlackRock, Inc. | 0.33% | 447,799 | -0.58% | 0% | $897,836 |
| VANGUARD FIDUCIARY TRUST CO | 0.22% | 294,478 | 0% | 0% | $590,428 |
Institutional Holders of ALX ONCOLOGY HOLDINGS INC - Common Stock, par value $0.001 per share (ALXO) across Reporting Periods
| Period | Reported Shares, Excl. Options | Value, Excl. Options | Value Change | Price (Median) | Investors |
|---|---|---|---|---|---|
| 2026 Q1 | 94,268,933 | $189,013,299 | +$125,379,513 | $2.00 | 69 |
| 2025 Q4 | 29,193,302 | $33,447,411 | +$624,566 | $1.13 | 55 |
| 2025 Q3 | 27,785,299 | $51,273,440 | +$2,395,861 | $1.83 | 60 |
| 2025 Q2 | 29,030,607 | $12,060,366 | -$2,784,536 | $0.42 | 58 |
| 2025 Q1 | 34,764,459 | $21,657,278 | -$4,297,920 | $0.62 | 83 |
| 2024 Q4 | 41,028,903 | $68,515,761 | -$8,509,648 | $1.67 | 85 |
| 2024 Q3 | 45,458,855 | $83,126,108 | -$40,248,836 | $1.82 | 90 |
| 2024 Q2 | 48,509,608 | $292,389,850 | -$2,826,841 | $6.03 | 107 |
| 2024 Q1 | 45,776,694 | $510,423,087 | -$5,822,832 | $11.15 | 105 |
| 2023 Q4 | 45,764,823 | $681,456,826 | +$185,269,081 | $14.89 | 93 |
| 2023 Q3 | 33,283,050 | $159,762,120 | -$6,348,070 | $4.80 | 75 |
| 2023 Q2 | 34,283,564 | $257,462,824 | -$6,376,897 | $7.51 | 74 |
| 2023 Q1 | 35,697,467 | $161,353,578 | -$6,004,481 | $4.52 | 85 |
| 2022 Q4 | 36,433,730 | $410,607,954 | -$2,049,707 | $11.27 | 85 |
| 2022 Q3 | 36,439,308 | $348,724,761 | +$5,422,376 | $9.57 | 96 |
| 2022 Q2 | 35,930,829 | $290,675,201 | -$16,579,357 | $8.09 | 92 |
| 2022 Q1 | 36,794,716 | $621,886,079 | +$2,845,527 | $16.90 | 94 |
| 2021 Q4 | 36,290,670 | $779,906,251 | -$55,903,331 | $21.49 | 103 |
| 2021 Q3 | 34,508,619 | $2,548,791,083 | +$109,794,972 | $73.86 | 113 |
| 2021 Q2 | 33,314,685 | $1,821,610,718 | -$28,517,807 | $54.68 | 102 |
| 2021 Q1 | 33,493,682 | $2,466,083,905 | +$80,496,245 | $73.74 | 90 |
| 2020 Q4 | 32,294,048 | $2,779,048,270 | +$439,356,967 | $86.20 | 89 |
| 2020 Q3 | 27,250,196 | $1,027,708,220 | +$1,027,708,220 | $37.74 | 56 |