Alnylam Pharmaceuticals, Inc.
DE ˙ XTRA ˙ US02043Q1076
260,50 € ↑8,70 (3,46%)
2026-06-04
DEL PRIS
SecurityDE:DUL / Alnylam Pharmaceuticals, Inc.
InstitutionQuadrant Capital Group Llc
Latest Disclosed Ownership611 shares
Latest Disclosed Value $ 202,162
Quadrant Capital Group Llc reports 0.65% decrease in ownership of DUL / Alnylam Pharmaceuticals, Inc.

On May 13, 2026 - Quadrant Capital Group Llc filed a 13F-HR/A form disclosing ownership of 611 shares of Alnylam Pharmaceuticals, Inc. (DE:DUL) valued at $174,563 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 12, 2026 disclosing 615 shares of Alnylam Pharmaceuticals, Inc.. This represents a change in shares of -0.65% during the quarter. The current value of the position is $159,166 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)
2026-05-13 2026-03-31 13F/A-1 ALNYLAM PHARMACEUTICALS COM 02043Q107 611 -4 -0.65 202 -17.21 0.0060
2026-05-11 2026-03-31 13F ALNYLAM PHARMACEUTICALS COM 02043Q107 611 -4 49 0.0369
2026-02-12 2025-12-31 13F ALNYLAM PHARMACEUTICALS COM 02043Q107 615 62 11.21 245 -3.17 0.0074
2025-11-13 2025-09-30 13F ALNYLAM PHARMACEUTICALS COM 02043Q107 553 553 252 0.0082
2025-08-13 2025-06-30 13F ALNYLAM PHARMACEUTICALS COM 02043Q107 0 -548 -100.00 0 -100.00
2025-05-13 2025-03-31 13F ALNYLAM PHARMACEUTICALS COM 02043Q107 548 302 122.76 148 157.89 0.0055
2025-02-13 2024-12-31 13F ALNYLAM PHARMACEUTICALS COM 02043Q107 246 -5 -1.99 58 -17.39 0.0040
2024-11-12 2024-09-30 13F ALNYLAM PHARMACEUTICALS COM 02043Q107 251 21 9.13 69 25.45 0.0048
2024-08-12 2024-06-30 13F ALNYLAM PHARMACEUTICALS COM 02043Q107 230 -1 -0.43 56 61.76 0.0042
2024-05-15 2024-03-31 13F ALNYLAM PHARMACEUTICALS COM 02043Q107 231 -75 -24.51 35 -41.38 0.0027
2024-02-08 2023-12-31 13F ALNYLAM PHARMACEUTICALS COM 02043Q107 306 31 11.27 59 20.83 0.0050
2023-11-14 2023-09-30 13F ALNYLAM PHARMACEUTICALS COM 02043Q107 275 23 9.13 49 2.13 0.0049
2023-08-10 2023-06-30 13F ALNYLAM PHARMACEUTICALS COM 02043Q107 252 -73 -22.46 48 -27.69 0.0047
2023-05-11 2023-03-31 13F ALNYLAM PHARMACEUTICALS COM 02043Q107 325 19 6.21 65 -9.72 0.0068
2023-02-13 2022-12-31 13F ALNYLAM PHARMACEUTICALS COM 02043Q107 306 -5 -1.61 73 16.13 0.0082
2022-11-10 2022-09-30 13F ALNYLAM PHARMACEUTICALS COM 02043Q107 311 11 3.67 62 40.91 0.0082
2022-08-09 2022-06-30 13F ALNYLAM PHARMACEUTICALS COM 02043Q107 300 7 2.39 44 -6.38 0.0059
2022-05-06 2022-03-31 13F ALNYLAM PHARMACEUTICALS COM 02043Q107 293 -59 -16.76 47 -21.67 0.0057
2022-02-01 2021-12-31 13F ALNYLAM PHARMACEUTICALS COM 02043Q107 352 -52 -12.87 60 -21.05 0.0072
2021-11-12 2021-09-30 13F ALNYLAM PHARMACEUTICALS COM 02043Q107 404 39 10.68 76 22.58 0.0106
2021-08-09 2021-06-30 13F ALNYLAM PHARMACEUTICALS COM 02043Q107 365 37 11.28 62 34.78 0.0090
2021-05-12 2021-03-31 13F ALNYLAM PHARMACEUTICALS COM 02043Q107 328 72 28.12 46 39.39 0.0075
2021-02-16 2020-12-31 13F ALNYLAM PHARMACEUTICALS COM 02043Q107 256 -167 -39.48 33 -46.77 0.0061
2020-11-13 2020-09-30 13F ALNYLAM PHARMACEUTICALS COM 02043Q107 423 237 127.42 62 121.43 0.0135
2020-08-13 2020-06-30 13F ALNYLAM PHARMACEUTICALS COM 02043Q107 186 -630 -77.21 28 -68.54 0.0062
2020-05-15 2020-03-31 13F Alnylam Pharmaceuticals Com 02043Q107 816 15 1.87 89 -1.11 0.0149
2020-03-19 2019-12-31 13F/A-1 Alnylam Pharmaceuticals Com 02043Q107 801 81 11.25 90 60.71 0.0109
2020-02-03 2019-12-31 13F Alnylam Pharmaceuticals Com 02043Q107 801 81 90 304.1217
2019-10-24 2019-09-30 13F Alnylam Pharmaceuticals COM 02043Q107 720 288 66.67 56 86.67 0.0086
2019-07-24 2019-06-30 13F Alnylam Pharmaceuticals COM 02043Q107 432 -89 -17.08 30 -34.78 0.0047
2019-04-29 2019-03-31 13F Alnylam Pharmaceuticals COM 02043Q107 521 440 543.21 46 820.00 0.0081
2019-01-17 2018-12-31 13F Alnylam Pharmaceuticals COM 02043Q107 81 -12 -12.90 5 -37.50 0.0013
2018-10-29 2018-09-30 13F Alnylam Pharmaceuticals COM 02043Q107 93 12 14.81 8 14.29 0.0023
2018-08-08 2018-06-30 13F Alnylam Pharmaceuticals COM 02043Q107 81 -45 -35.71 7 -50.00 0.0025
2018-05-10 2018-03-31 13F Alnylam Pharmaceuticals COM 02043Q107 126 45 55.56 14 40.00 0.0051
2018-01-31 2017-12-31 13F Alnylam Pharmaceuticals COM 02043Q107 81 0 0.00 10 11.11 0.0040
2017-10-13 2017-09-30 13F Alnylam Pharmaceuticals COM 02043Q107 81 0 0.00 9 50.00 0.0037
2017-08-14 2017-06-30 13F Alnylam Pharmaceuticals COM 02043Q107 81 81 6 0.0027
2017-01-11 2016-12-31 13F Alnylam Pharmaceuticals COM 02043Q107 0 -123 -100.00 0 -100.00
2016-10-25 2016-09-30 13F Alnylam Pharmaceuticals COM 02043Q107 123 0 0.00 7 16.67 0.0046
2016-07-28 2016-06-30 13F Alnylam Pharmaceuticals COM 02043Q107 123 108 720.00 6 0.0041
2016-04-27 2016-03-31 13F Alnylam Pharmaceuticals COM 02043Q107 15 -54 -78.26 0 -100.00
2016-01-28 2015-12-31 13F Alnylam Pharmaceuticals COM 02043Q107 69 69 6 0.0042
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.