Alnylam Pharmaceuticals, Inc.
DE ˙ XTRA ˙ US02043Q1076
260,50 € ↑8,70 (3,46%)
2026-06-04
DEL PRIS
SecurityDE:DUL / Alnylam Pharmaceuticals, Inc.
InstitutionHall Laurie J Trustee
Latest Disclosed Ownership2,812 shares
Latest Disclosed Value $ 930,406
Hall Laurie J Trustee ownership in DUL / Alnylam Pharmaceuticals, Inc.

On April 6, 2026 - Hall Laurie J Trustee filed a 13F-HR form disclosing ownership of 2,812 shares of Alnylam Pharmaceuticals, Inc. (DE:DUL) valued at $803,388 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 20, 2026 disclosing 2,812 shares of Alnylam Pharmaceuticals, Inc.. This represents a change in shares of 0.00% during the quarter. The current value of the position is $732,526 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)
2026-04-06 2026-03-31 13F ALNYLAM PHARMA Equities 02043Q107 2,812 0 0.00 930 -16.82 0.2112
2026-01-20 2025-12-31 13F ALNYLAM PHARMA Equities 02043Q107 2,812 -438 -13.48 1,118 -24.56 0.3716
2025-10-14 2025-09-30 13F ALNYLAM PHARMA Equities 02043Q107 3,250 0 0.00 1,482 39.94 0.4842
2025-07-15 2025-06-30 13F ALNYLAM PHARMA Equities 02043Q107 3,250 0 0.00 1,060 20.75 0.3504
2025-05-15 2025-03-31 13F ALNYLAM PHARMA Equities 02043Q107 3,250 0 0.00 878 0.3131
2025-01-16 2024-12-31 13F ALNYLAM PHARMA COM 02043Q107 3,250 0 0.00 1 0.2511
2024-10-08 2024-09-30 13F ALNYLAM PHARMA COM 02043Q107 3,250 0 0.00 1 0.2833
2024-07-22 2024-06-30 13F ALNYLAM PHARMA COM 02043Q107 3,250 0 0.00 1 0.2750
2024-04-23 2024-03-31 13F ALNYLAM PHARMA COM 02043Q107 3,250 0 0.00 0 0.1712
2024-01-11 2023-12-31 13F ALNYLAM PHARMA COM 02043Q107 3,250 0 0.00 1 0.2384
2023-10-12 2023-09-30 13F ALNYLAM PHARMA COM 02043Q107 3,250 0 0.00 1 0.2452
2023-07-14 2023-06-30 13F ALNYLAM PHARMA COM 02043Q107 3,250 0 0.00 1 0.2449
2023-04-07 2023-03-31 13F ALNYLAM PHARMA COM 02043Q107 3,250 0 0.00 1 -100.00 0.2777
2023-01-11 2022-12-31 13F ALNYLAM PHARMA COM 02043Q107 3,250 0 0.00 1 -100.00 0.3476
2022-10-11 2022-09-30 13F ALNYLAM PHARMA COM 02043Q107 3,250 0 0.00 651 37.34 0.3208
2022-07-06 2022-06-30 13F ALNYLAM PHARMA COM 02043Q107 3,250 0 0.00 474 -10.73 0.2216
2022-04-06 2022-03-31 13F ALNYLAM PHARMA COM 02043Q107 3,250 0 0.00 531 -3.63 0.2041
2022-01-05 2021-12-31 13F ALNYLAM PHARMA COM 02043Q107 3,250 -550 -14.47 551 -23.15 0.1952
2021-10-04 2021-09-30 13F ALNYLAM PHARMA COM 02043Q107 3,800 0 0.00 717 11.34 0.2768
2021-07-07 2021-06-30 13F ALNYLAM PHARMA COM 02043Q107 3,800 0 0.00 644 19.93 0.2430
2021-04-15 2021-03-31 13F ALNYLAM PHARMA COM 02043Q107 3,800 0 0.00 537 8.70 0.2062
2021-01-25 2020-12-31 13F ALNYLAM PHARMA COM 02043Q107 3,800 0 0.00 494 -10.67 0.2000
2020-10-09 2020-09-30 13F ALNYLAM PHARMA COM 02043Q107 3,800 0 0.00 553 26.26 0.2473
2020-02-12 2019-12-31 13F ALNYLAM PHARMA COM 02043Q107 3,800 0 0.00 438 43.14 0.2021
2019-10-25 2019-09-30 13F ALNYLAM PHARMA COM 02043Q107 3,800 0 0.00 306 10.87 0.1560
2019-08-01 2019-06-30 13F ALNYLAM PHARMA COM 02043Q107 3,800 0 0.00 276 -22.25 0.1433
2019-05-02 2019-03-31 13F ALNYLAM PHARMA COM 02043Q107 3,800 0 0.00 355 11.29 0.1870
2019-02-14 2018-12-31 13F ALNYLAM PHARMA COM 02043Q107 3,800 0 0.00 319 -4.20 0.1759
2018-10-30 2018-09-30 13F ALNYLAM PHARMA COM 02043Q107 3,800 0 0.00 333 -10.96 0.1755
2018-08-01 2018-06-30 13F ALNYLAM PHARMA COM 02043Q107 3,800 0 0.00 374 -17.44 0.2149
2018-05-10 2018-03-31 13F ALNYLAM PHARMA COM 02043Q107 3,800 0 0.00 453 -6.21 0.2760
2018-01-30 2017-12-31 13F ALNYLAM PHARMA COM 02043Q107 3,800 0 0.00 483 8.30 0.2752
2017-10-02 2017-09-30 13F ALNYLAM PHARMA COM 02043Q107 3,800 0 0.00 446 47.19 0.2779
2017-08-22 2017-06-30 13F ALNYLAM PHARMA COM 02043Q107 3,800 0 0.00 303 67.40 0.1937
2017-04-13 2017-03-31 13F ALNYLAM PHARMA COM 02043Q107 3,800 0 0.00 181 13.13 0.1155
2017-01-10 2016-12-31 13F ALNYLAM PHARMA COM 02043Q107 3,800 0 0.00 160 -33.61 0.1021
2016-07-12 2016-06-30 13F ALNYLAM PHARMA COM 02043Q107 3,800 0 0.00 241 -11.72 0.1571
2016-04-28 2016-03-31 13F ALNYLAM PHARMA COM 02043Q107 3,800 0 0.00 273 12.35 0.1719
2016-02-19 2015-12-31 13F ALNYLAM PHARMA COM 02043Q107 3,800 0 0.00 243 -20.33 0.1750
2015-10-26 2015-09-30 13F ALNYLAM PHARMACEUTICALS COMMON STOCK 02043Q107 3,800 0 0.00 305 -33.11 0.2436
2015-07-16 2015-06-30 13F ALNYLAM PHARMACEUTICALS COMMON STOCK 02043Q107 3,800 0 0.00 456 14.86 0.3320
2015-04-24 2015-03-31 13F ALNYLAM PHARMACEUTICALS COMMON STOCK 02043Q107 3,800 3,800 0.00 397 0.2893
2015-02-03 2014-12-31 13F ALNYLAM PHARMACEUTICALS COMMON STOCK 02043Q107 0 -3,800 -100.00 0 -100.00
2014-11-10 2014-09-30 13F ALNYLAM PHARMACEUTICALS COMMON STOCK 02043Q107 3,800 0 0.00 297 23.75 0.2233
2014-07-21 2014-06-30 13F ALNYLAM PHARMACEUTICALS COMMON STOCK 02043Q107 3,800 0 0.00 240 -5.88 0.1803
2014-04-23 2014-03-31 13F/A-1 ALNYLAM PHARMACEUTICALS COMMON STOCK 02043Q107 3,800 0 0.00 255 4.51 0.1972
2014-04-22 2014-03-31 13F ALNYLAM PHARMACEUTICALS COMMON STOCK 02043Q107 3,800 244
2014-02-21 2013-12-31 13F ALNYLAM PHARMACEUTICALS COMMON STOCK 02043Q107 3,800 0 0.00 244 0.41 0.1876
2013-10-15 2013-09-30 13F ALNYLAM PHARMACEUTICALS COMMON STOCK 02043Q107 3,800 3,800 243 0.2047
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.