Alnylam Pharmaceuticals, Inc.
DE ˙ XTRA ˙ US02043Q1076
260,50 € ↑8,70 (3,46%)
2026-06-04
CENA AKCJI
SecurityDE:DUL / Alnylam Pharmaceuticals, Inc.
InstitutionSummit Trail Advisors, Llc
Latest Disclosed Ownership3,598 shares
Latest Disclosed Value $ 1,190,470
Summit Trail Advisors, Llc reports 2.39% increase in ownership of DUL / Alnylam Pharmaceuticals, Inc.

On May 12, 2026 - Summit Trail Advisors, Llc filed a 13F-HR form disclosing ownership of 3,598 shares of Alnylam Pharmaceuticals, Inc. (DE:DUL) valued at $1,027,949 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 3,514 shares of Alnylam Pharmaceuticals, Inc.. This represents a change in shares of 2.39% during the quarter. The current value of the position is $937,279 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date
Effective
Date
Form Security Class ID Avg Price
Paid (Est)
Reported
Shares
ΔShares ΔShares
(%)
Reported
Value
(x1000)
ΔValue
(%)
Alloc
(%)
ΔAlloc ΔAlloc (%) Cost Basis
(x1000)
Unrealized
Gain/Loss
(x1000)
2026-05-12 2026-03-31 13F ALNYLAM PHARMACEUTICALS COM 02043Q107 3,598 84 2.39 1,190 -14.82 0.0171
2026-02-17 2025-12-31 13F ALNYLAM PHARMACEUTICALS COM 02043Q107 3,514 79 2.30 1,397 -10.79 0.0242
2025-11-14 2025-09-30 13F ALNYLAM PHARMACEUTICALS COM 02043Q107 3,435 626 22.29 1,566 71.15 0.0216
2025-08-14 2025-06-30 13F ALNYLAM PHARMACEUTICALS COM 02043Q107 2,809 1,006 55.80 916 88.27 0.0157
2025-04-28 2025-03-31 13F ALNYLAM PHARMACEUTICALS COM 02043Q107 1,803 518 40.31 487 60.93 0.0161
2025-01-29 2024-12-31 13F ALNYLAM PHARMACEUTICALS COM 02043Q107 1,285 151 13.32 302 -2.89 0.0112
2024-11-12 2024-09-30 13F ALNYLAM PHARMACEUTICALS COM 02043Q107 1,134 205 22.07 312 38.22 0.0077
2024-08-13 2024-06-30 13F ALNYLAM PHARMACEUTICALS INC COM COM 02043Q107 929 929 226 0.0059
2018-08-10 2018-06-30 13F ALNYLAM PHARMACEUTICALS INC COM EQUITY 02043Q107 0 -27,658 -100.00 0 -100.00
2018-05-21 2018-03-31 13F ALNYLAM PHARMACEUTICALS INC COM EQUITY 02043Q107 27,658 27,369 9,470.24 28 -28.21 0.0044
2018-02-14 2017-12-31 13F ALNYLAM PHARMACEUTICALS EQUITY 02043Q107 289 289 39 0.0049
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.