Alnylam Pharmaceuticals, Inc.
DE ˙ XTRA ˙ US02043Q1076
251,80 € ↑6,70 (2,73%)
2026-06-03
DEL PRIS
SecurityDE:DUL / Alnylam Pharmaceuticals, Inc.
InstitutionEdgestream Partners, L.P.
Latest Disclosed Ownership5,810 shares
Latest Disclosed Value $ 1,922,355
Edgestream Partners, L.P. reports 19.84% decrease in ownership of DUL / Alnylam Pharmaceuticals, Inc.

On May 18, 2026 - Edgestream Partners, L.P. filed a 13F-HR form disclosing ownership of 5,810 shares of Alnylam Pharmaceuticals, Inc. (DE:DUL) valued at $1,659,917 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 7,248 shares of Alnylam Pharmaceuticals, Inc.. This represents a change in shares of -19.84% during the quarter. The current value of the position is $1,462,958 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)
2026-05-18 2026-03-31 13F ALNYLAM PHARMACEUTICALS COM 02043Q107 5,810 -1,438 -19.84 1,922 -33.31 0.0631
2026-02-13 2025-12-31 13F ALNYLAM PHARMACEUTICALS COM 02043Q107 7,248 7,248 2,882 0.0811
2025-05-02 2025-03-31 13F ALNYLAM PHARMACEUTICALS COM 02043Q107 0 -13,806 -100.00 0 -100.00
2025-02-07 2024-12-31 13F ALNYLAM PHARMACEUTICALS COM 02043Q107 13,806 13,806 3,249 0.1384
2024-11-14 2024-09-30 13F ALNYLAM PHARMACEUTICALS COM 02043Q107 0 -6,052 -100.00 0 -100.00
2024-08-09 2024-06-30 13F ALNYLAM PHARMACEUTICALS COM 02043Q107 6,052 -17,303 -74.09 1,471 -57.88 0.0708
2024-05-10 2024-03-31 13F ALNYLAM PHARMACEUTICALS COM 02043Q107 23,355 15,394 193.37 3,490 129.15 0.1740
2024-02-14 2023-12-31 13F ALNYLAM PHARMACEUTICALS COM 02043Q107 7,961 5,536 228.29 1,524 255.01 0.1097
2023-11-15 2023-09-30 13F ALNYLAM PHARMACEUTICALS COM 02043Q107 2,425 -9,120 -79.00 429 -80.43 0.0342
2023-08-10 2023-06-30 13F ALNYLAM PHARMACEUTICALS COM 02043Q107 11,545 3,872 50.46 2,193 42.62 0.1985
2023-05-15 2023-03-31 13F ALNYLAM PHARMACEUTICALS COM 02043Q107 7,673 7,673 1,537 0.1697
2022-11-14 2022-09-30 13F ALNYLAM PHARMACEUTICALS COM 02043Q107 0 -10,785 -100.00 0 -100.00
2022-08-12 2022-06-30 13F ALNYLAM PHARMACEUTICALS COM 02043Q107 10,785 6,783 169.49 1,573 140.89 0.1240
2022-05-13 2022-03-31 13F ALNYLAM PHARMACEUTICALS COM 02043Q107 4,002 -17,985 -81.80 653 -82.49 0.0520
2022-02-15 2021-12-31 13F ALNYLAM PHARMACEUTICALS COM 02043Q107 21,987 5,566 33.90 3,729 20.29 0.2324
2021-11-15 2021-09-30 13F ALNYLAM PHARMACEUTICALS COM 02043Q107 16,421 4,740 40.58 3,100 56.57 0.1916
2021-08-10 2021-06-30 13F ALNYLAM PHARMACEUTICALS COM 02043Q107 11,681 11,681 1,980 0.1168
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.