Alnylam Pharmaceuticals, Inc.
DE ˙ XTRA ˙ US02043Q1076
260,50 € ↑8,70 (3,46%)
2026-06-04
DEL PRIS
SecurityDE:DUL / Alnylam Pharmaceuticals, Inc.
InstitutionOrion Capital Management LLC
Latest Disclosed Ownership2,855 shares
Latest Disclosed Value $ 944,634
Orion Capital Management LLC reports 3.77% decrease in ownership of DUL / Alnylam Pharmaceuticals, Inc.

On May 14, 2026 - Orion Capital Management LLC filed a 13F-HR form disclosing ownership of 2,855 shares of Alnylam Pharmaceuticals, Inc. (DE:DUL) valued at $815,674 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 3, 2026 disclosing 2,967 shares of Alnylam Pharmaceuticals, Inc.. This represents a change in shares of -3.77% during the quarter. The current value of the position is $743,728 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)
2026-05-14 2026-03-31 13F ALNYLAM PHARMACEUTICALS COM 02043Q107 2,855 -112 -3.77 945 -19.93 0.3247
2026-02-03 2025-12-31 13F ALNYLAM PHARMACEUTICALS COM 02043Q107 2,967 -173 -5.51 1,180 -17.61 0.3967
2025-10-31 2025-09-30 13F ALNYLAM PHARMACEUTICALS COM 02043Q107 3,140 -100 -3.09 1,432 35.51 0.4975
2025-07-31 2025-06-30 13F ALNYLAM PHARMACEUTICALS COM 02043Q107 3,240 -100 -2.99 1,057 17.20 0.4019
2025-05-14 2025-03-31 13F ALNYLAM PHARMACEUTICALS COM 02043Q107 3,340 0 0.00 902 14.78 0.3800
2025-02-18 2024-12-31 13F ALNYLAM PHARMACEUTICALS COM 02043Q107 3,340 -85 -2.48 786 -16.58 0.3450
2024-11-18 2024-09-30 13F ALNYLAM PHARMACEUTICALS COM 02043Q107 3,425 -150 -4.20 942 8.41 0.4570
2024-08-14 2024-06-30 13F ALNYLAM PHARMACEUTICALS COM 02043Q107 3,575 -100 -2.72 869 58.11 0.4559
2024-05-10 2024-03-31 13F ALNYLAM PHARMACEUTICALS COM 02043Q107 3,675 0 0.00 549 -21.91 0.2917
2024-02-06 2023-12-31 13F ALNYLAM PHARMACEUTICALS COM 02043Q107 3,675 0 0.00 703 8.15 0.4119
2023-11-16 2023-09-30 13F ALNYLAM PHARMACEUTICALS COM 02043Q107 3,675 -300 -7.55 651 -13.91 0.4225
2023-08-08 2023-06-30 13F ALNYLAM PHARMACEUTICALS COM 02043Q107 3,975 0 0.00 755 -5.15 0.4959
2023-05-10 2023-03-31 13F ALNYLAM PHARMACEUTICALS COM 02043Q107 3,975 -30 -0.75 796 -16.30 0.5328
2023-01-23 2022-12-31 13F ALNYLAM PHARMACEUTICALS COM 02043Q107 4,005 -170 -4.07 952 13.76 0.6977
2022-10-27 2022-09-30 13F ALNYLAM PHARMACEUTICALS COM 02043Q107 4,175 -1,690 -28.82 836 -2.22 0.6723
2022-07-22 2022-06-30 13F ALNYLAM PHARMACEUTICALS COM 02043Q107 5,865 -700 -10.66 855 -20.24 0.6626
2022-05-11 2022-03-31 13F ALNYLAM PHARMACEUTICALS COM 02043Q107 6,565 -100 -1.50 1,072 -5.13 0.6451
2022-02-07 2021-12-31 13F ALNYLAM PHARMACEUTICALS COM 02043Q107 6,665 -10 -0.15 1,130 -10.32 0.6420
2021-10-25 2021-09-30 13F ALNYLAM PHARMACEUTICALS COM 02043Q107 6,675 0 0.00 1,260 11.31 0.7621
2021-08-09 2021-06-30 13F ALNYLAM PHARMACEUTICALS COM 02043Q107 6,675 0 0.00 1,132 20.17 0.7043
2021-05-14 2021-03-31 13F ALNYLAM PHARMACEUTICALS COM 02043Q107 6,675 0 0.00 942 8.53 0.6576
2021-02-23 2020-12-31 13F ALNYLAM PHARMACEUTICALS INC COM COM 02043Q107 6,675 6,675 868 0.6421
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.