ALNYLAM PHARMACEUTICALS INC (ALNY): Institutional Ownership
Hedge funds and institutional managers reporting a position in ALNY · Health Care. Based on the most recent 13F filing from each holder, sourced from SEC EDGAR.
Reported Holders
24
13F filers
Aggregate Value
$1.9B
Across holders
Last Price
$291.37
2026-06-26
Sector
Health Care
GICS
Holder activity8 new7 added9 reduced
| Manager⇅ | Type⇅ | Shares⇅ | Market Value▼ | % of Total⇅ | % of Portfolio⇅ | Action⇅ | QoQ Change⇅ | Quarter⇅ |
|---|---|---|---|---|---|---|---|---|
| TWO SIGMA INVESTMENTS, LP CIK 0001179392 | Hedge Fund | 1.99M | $659.3M | 33.9% | 0.5% | Added | +$455.4M | Q1 2026 |
| DODGE & COX CIK 0000200217 | Institutional Manager | 1.93M | $638.3M | 32.9% | 0.4% | Reduced | $-11.6M | Q1 2026 |
| Qube Research & Technologies Ltd CIK 0001729829 | Hedge Fund | 838K | $277.3M | 14.3% | 0.3% | Added | +$21.0M | Q1 2026 |
| BAILLIE GIFFORD & CO CIK 0001088875 | Institutional Manager | 287K | $95.0M | 4.9% | 0.1% | Reduced | $-6.6M | Q1 2026 |
| MARSHALL WACE, LLP CIK 0001318757 | Hedge Fund | 270K | $89.2M | 4.6% | 0.1% | Reduced | $-4.3M | Q1 2026 |
| Bridgewater Associates, LP CIK 0001350694 | Hedge Fund | 107K | $35.3M | 1.8% | 0.2% | Added | +$6.9M | Q1 2026 |
| Man Group plc CIK 0001637460 | Hedge Fund | 98K | $32.5M | 1.7% | 0.1% | Added | +$16.9M | Q1 2026 |
| ADAGE CAPITAL PARTNERS GP, L.L.C. CIK 0001165408 | Hedge Fund | 84K | $27.5M | 1.4% | 0.0% | New | — | Q2 2025 |
| Schonfeld Strategic Advisors LLC CIK 0001665241 | Hedge Fund | 72K | $23.7M | 1.2% | 0.2% | Added | +$8.9M | Q1 2026 |
| Gotham Asset Management, LLC CIK 0001510387 | Hedge Fund | 44K | $14.5M | 0.7% | 0.0% | Added | +$1.4M | Q1 2026 |
| ExodusPoint Capital Management, LP CIK 0001736225 | Hedge Fund | 31K | $14.1M | 0.7% | 0.1% | New | — | Q3 2025 |
| Hudson Bay Capital Management LP CIK 0001393825 | Hedge Fund | 40K | $13.2M | 0.7% | 0.0% | Reduced | $-14.9M | Q1 2026 |
| CITADEL ADVISORS LLC CIK 0001423053 | Hedge Fund | 23K | $7.7M | 0.4% | 0.0% | Reduced | $-22.1M | Q1 2026 |
| Holocene Advisors, LP CIK 0001700574 | Hedge Fund | 13K | $6.0M | 0.3% | 0.0% | New | — | Q3 2025 |
| Fisher Asset Management, LLC CIK 0000850529 | Institutional Manager | 6K | $2.0M | 0.1% | 0.0% | New | — | Q1 2026 |
| SOROS FUND MANAGEMENT LLC CIK 0001029160 | Family Office | 4K | $2.0M | 0.1% | 0.0% | New | — | Q3 2025 |
| MOORE CAPITAL MANAGEMENT, LP CIK 0001448574 | Hedge Fund | 4K | $1.9M | 0.1% | 0.0% | New | — | Q3 2025 |
| Brevan Howard Capital Management LP CIK 0001512857 | Hedge Fund | 5K | $1.5M | 0.1% | 0.0% | Added | +$61K | Q1 2026 |
| Walleye Capital LLC CIK 0001758720 | Hedge Fund | 3K | $873K | 0.0% | 0.0% | Reduced | $-3.6M | Q1 2026 |
| TUDOR INVESTMENT CORP ET AL CIK 0000923093 | Hedge Fund | 900 | $298K | 0.0% | 0.0% | Reduced | $-596K | Q1 2026 |
Added
Hedge Fund
$659.3M· 33.9% of total· 0.5% port· 1.99M sh· +$455.4M QoQ· Q1 2026
Reduced
Institutional Manager
$638.3M· 32.9% of total· 0.4% port· 1.93M sh· $-11.6M QoQ· Q1 2026
Added
Hedge Fund
$277.3M· 14.3% of total· 0.3% port· 838K sh· +$21.0M QoQ· Q1 2026
Reduced
Institutional Manager
$95.0M· 4.9% of total· 0.1% port· 287K sh· $-6.6M QoQ· Q1 2026
Reduced
Hedge Fund
$89.2M· 4.6% of total· 0.1% port· 270K sh· $-4.3M QoQ· Q1 2026
Added
Hedge Fund
$35.3M· 1.8% of total· 0.2% port· 107K sh· +$6.9M QoQ· Q1 2026
Added
Hedge Fund
$32.5M· 1.7% of total· 0.1% port· 98K sh· +$16.9M QoQ· Q1 2026
New
Hedge Fund
$27.5M· 1.4% of total· 0.0% port· 84K sh· — QoQ· Q2 2025
Added
Hedge Fund
$23.7M· 1.2% of total· 0.2% port· 72K sh· +$8.9M QoQ· Q1 2026
Added
Hedge Fund
$14.5M· 0.7% of total· 0.0% port· 44K sh· +$1.4M QoQ· Q1 2026
New
Hedge Fund
$14.1M· 0.7% of total· 0.1% port· 31K sh· — QoQ· Q3 2025
Reduced
Hedge Fund
$13.2M· 0.7% of total· 0.0% port· 40K sh· $-14.9M QoQ· Q1 2026
Reduced
Hedge Fund
$7.7M· 0.4% of total· 0.0% port· 23K sh· $-22.1M QoQ· Q1 2026
New
Hedge Fund
$6.0M· 0.3% of total· 0.0% port· 13K sh· — QoQ· Q3 2025
New
Institutional Manager
$2.0M· 0.1% of total· 0.0% port· 6K sh· — QoQ· Q1 2026
New
Family Office
$2.0M· 0.1% of total· 0.0% port· 4K sh· — QoQ· Q3 2025
New
Hedge Fund
$1.9M· 0.1% of total· 0.0% port· 4K sh· — QoQ· Q3 2025
Added
Hedge Fund
$1.5M· 0.1% of total· 0.0% port· 5K sh· +$61K QoQ· Q1 2026
Reduced
Hedge Fund
$873K· 0.0% of total· 0.0% port· 3K sh· $-3.6M QoQ· Q1 2026
Reduced
Hedge Fund
$298K· 0.0% of total· 0.0% port· 900 sh· $-596K QoQ· Q1 2026
Reduced
Hedge Fund
$297K· 0.0% of total· 0.0% port· 898 sh· $-1.0M QoQ· Q1 2026
New
Family Office
$263K· 0.0% of total· 0.0% port· 806 sh· — QoQ· Q2 2025
New
Hedge Fund
$6K· 0.0% of total· 0.0% port· 15 sh· — QoQ· Q4 2025
Reduced
Hedge Fund
$652· 0.0% of total· 0.0% port· 2 sh· $-4K QoQ· Q1 2026
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