Ranked by reported Q1 2026 13F market value
Share of total reported institutional value in ALMS held by the largest 10 / 25 filers.
| # | Institution | Shares Held | Market Value | QoQ Change | Ownership % | % of Fund |
|---|---|---|---|---|---|---|
| 1 | BlackRock, Inc. | 7.2M | $158.0M | +57.0% | 5.734% | 0.00% |
| 2 | Deep Track Capital, LP | 6.8M | $149.2M | β | 5.416% | 3.08% |
| 3 | Samsara BioCapital, LLC | 6.3M | $139.8M | +10.2% | 5.074% | 13.58% |
| 4 | Foresite Capital Management V, LLC | 5.9M | $129.9M | +2.0% | 4.716% | 47.94% |
| 5 | venBio Partners LLC | 4.5M | $99.8M | -2.0% | 3.621% | 35.56% |
| 6 | Foresite Capital Management VI LLC | 4.2M | $93.6M | 0.0% | 3.397% | 20.33% |
| 7 | VANGUARD CAPITAL MANAGEMENT LLC | 4.0M | $88.8M | β | 3.225% | 0.00% |
| 8 | Cormorant Asset Management, LP | 3.9M | $87.0M | +8.6% | 3.158% | 4.37% |
| 9 | Nextech Invest, Ltd. | 3.5M | $78.0M | +21.4% | 2.832% | 5.49% |
| 10 | Saturn V Capital Management LP | 3.2M | $70.5M | +2.1% | 2.561% | 12.77% |
| 11 | UBS Group AG | 3.1M | $67.3M | +2579.8% | 2.443% | 0.01% |
| 12 | Octagon Capital Advisors LP | 2.8M | $62.4M | +11.8% | 2.264% | 6.90% |
| 13 | MPM Oncology Impact Management LP | 2.4M | $52.6M | -0.6% | 1.908% | 4.06% |
| 14 | JANUS HENDERSON GROUP PLC | 2.1M | $46.2M | β | 1.676% | 0.02% |
| 15 | BAKER BROS. ADVISORS LP | 2.0M | $44.3M | +28.8% | 1.609% | 0.25% |
| 16 | SR ONE CAPITAL MANAGEMENT, LP | 2.0M | $43.2M | 0.0% | 1.567% | 4.72% |
| 17 | GEODE CAPITAL MANAGEMENT, LLC | 1.9M | $42.3M | +29.0% | 1.534% | 0.00% |
| 18 | STATE STREET CORP | 1.8M | $39.7M | +43.1% | 1.441% | 0.00% |
| 19 | Invesco Ltd. | 1.5M | $33.3M | +258.3% | 1.209% | 0.01% |
| 20 | Ikarian Capital, LLC | 1.5M | $32.6M | β | 1.182% | 3.46% |
| 21 | MARSHALL WACE, LLP | 1.2M | $25.8M | +214.5% | 0.938% | 0.03% |
| 22 | Weiss Asset Management LP | 1.1M | $24.2M | β | 0.878% | 0.53% |
| 23 | PRINCIPAL FINANCIAL GROUP INC | 1.1M | $23.3M | β | 0.846% | 0.01% |
| 24 | FMR LLC | 974K | $21.5M | +3959.6% | 0.779% | 0.00% |
| 25 | GREAT POINT PARTNERS LLC | 856K | $18.9M | β | 0.685% | 4.62% |
denotes a marquee investor (Buffett, Burry, ARK, Tiger Global, Pershing Square, Baupost and other widely-followed managers). β% of Fundβ shows how much of that investorβs total 13F portfolio is invested in ALMS β a direct measure of their conviction.
Filings activity in ALMS during Q1 2026, grouped by how each filer changed its position.
8 quarters of 13F filings Β· Ξ columns show change vs prior quarter
| Quarter | Inst. Holders | Ξ Holders | Ownership % | Ξ Ownership | Total 13F Value | Ξ Value |
|---|---|---|---|---|---|---|
| Q1 2026 | 193 | +45% | 70.07% | +44.51 pp | $2.12B | +174% |
| Q4 2025 | 133 | +4.7% | 25.56% | +15.01 pp | $772M | +142% |
| Q3 2025 | 127 | +12% | 10.55% | +2.52 pp | $319M | +31% |
| Q2 2025 | 113 | +55% | 8.03% | 0.14 pp | $243M | 1.7% |
| Q1 2025 | 73 | +14% | 8.17% | 2.30 pp | $247M | 22% |
| Q4 2024 | 64 | +23% | 10.47% | 1.89 pp | $316M | 15% |
| Q3 2024 | 52 | +73% | 12.36% | 0.22 pp | $373M | 1.7% |
| Q2 2024 | 30 | β | 12.58% | β | $380M | β |
Source: SEC 13F institutional filings. Ownership % requires market cap data and will show once linked. Ξ columns compare to the immediately prior filed quarter.
Quick answers to the most common questions about buying ALMS stock.
Based on Q1 2026 13F filings, institutional ownership of Alumis Inc. Common Stock stands at 70.1%, held across 193 reporting institutions.
BlackRock, Inc. is the largest reported institutional holder of ALMS, with approximately 7,170,868 shares worth $0.16B as of Q1 2026.
No marquee "smart money" managers (Berkshire, Burry, ARK, Tiger Global, Pershing Square, Baupost, etc.) currently appear among the top 25 institutional holders of ALMS.
Our composite Smart Money Score for ALMS is 59 out of 100 (Neutral). It combines net institutional buying activity, ownership shift, marquee investor presence, and holder-count growth.
89 institutions opened new positions in ALMS during Q1 2026, while 29 fully exited. 97 added to existing positions and 7 trimmed.
ALMS institutional ownership rose by 44.51 percentage points quarter-over-quarter, with a net change of +60 holders.
The top 10 institutions account for 51.7% of all reported 13F value in ALMS, and the top 25 account for 79.0%.
All data is sourced from SEC Form 13F filings, which institutional investment managers with at least $100M in assets are required to file each quarter. We process every 13F filing from EDGAR and recompute the aggregates after each cycle. Insider transactions are sourced from Form 4 filings.
Alumis Inc. Common Stock (ALMS) Institutional Ownership