Alnylam Pharmaceuticals, Inc.
DE ˙ XTRA ˙ US02043Q1076
260,50 € ↑8,70 (3,46%)
2026-06-04
DEL PRIS
SecurityDE:DUL / Alnylam Pharmaceuticals, Inc.
InstitutionSmartleaf Asset Management LLC
Latest Disclosed Ownership1,361 shares
Latest Disclosed Value $ 430,198
Smartleaf Asset Management LLC reports 13.13% increase in ownership of DUL / Alnylam Pharmaceuticals, Inc.

On May 15, 2026 - Smartleaf Asset Management LLC filed a 13F-HR form disclosing ownership of 1,361 shares of Alnylam Pharmaceuticals, Inc. (DE:DUL) valued at $388,838 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 1,203 shares of Alnylam Pharmaceuticals, Inc.. This represents a change in shares of 13.13% during the quarter. The current value of the position is $354,540 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)
2026-05-15 2026-03-31 13F ALNYLAM PHARMACEUTICALS COM 02043Q107 1,361 158 13.13 430 -9.85 0.0155
2026-02-13 2025-12-31 13F ALNYLAM PHARMACEUTICALS COM 02043Q107 1,203 126 11.70 478 -0.83 0.0181
2025-11-05 2025-09-30 13F ALNYLAM PHARMACEUTICALS COM 02043Q107 1,077 483 81.31 482 151.83 0.0298
2025-08-14 2025-06-30 13F ALNYLAM PHARMACEUTICALS COM 02043Q107 594 -301 -33.63 192 -20.42 0.0169
2025-05-14 2025-03-31 13F ALNYLAM PHARMACEUTICALS COM 02043Q107 895 148 19.81 240 36.36 0.0232
2025-02-05 2024-12-31 13F ALNYLAM PHARMACEUTICALS COM 02043Q107 747 306 69.39 176 45.45 0.0180
2024-11-13 2024-09-30 13F ALNYLAM PHARMACEUTICALS COM 02043Q107 441 326 283.48 121 332.14 0.0147
2024-10-08 2024-06-30 13F/A-1 ALNYLAM PHARMACEUTICALS COM 02043Q107 115 105 1,050.00 28 2,700.00 0.0047
2024-08-13 2024-06-30 13F ALNYLAM PHARMACEUTICALS COM 02043Q107 115 105 28 0.0047
2024-10-07 2024-03-31 13F/A-1 ALNYLAM PHARMACEUTICALS COM 02043Q107 10 10 2 0.0003
2024-05-03 2024-03-31 13F ALNYLAM PHARMACEUTICALS COM 02043Q107 10 10 1 0.0003
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.