Alnylam Pharmaceuticals, Inc.
DE ˙ XTRA ˙ US02043Q1076
261,40 € ↑0,90 (0,35%)
2026-06-05
DEL PRIS
SecurityDE:DUL / Alnylam Pharmaceuticals, Inc.
InstitutionCapital International Ltd /ca/
Latest Disclosed Ownership29,078 shares
Latest Disclosed Value $ 9,621,038
Capital International Ltd /ca/ reports 57.03% decrease in ownership of DUL / Alnylam Pharmaceuticals, Inc.

On May 13, 2026 - Capital International Ltd /ca/ filed a 13F-HR form disclosing ownership of 29,078 shares of Alnylam Pharmaceuticals, Inc. (DE:DUL) valued at $8,307,585 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 11, 2026 disclosing 67,667 shares of Alnylam Pharmaceuticals, Inc.. This represents a change in shares of -57.03% during the quarter. The current value of the position is $7,574,819 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 ALNYLAM PHARMACEUTICALS COM 02043Q107 29,078 -38,589 -57.03 9,621 -64.24 0.3566
2026-02-11 2025-12-31 13F ALNYLAM PHARMACEUTICALS COM 02043Q107 67,667 -10,556 -13.49 26,908 -24.56 0.9483
2025-11-13 2025-09-30 13F ALNYLAM PHARMACEUTICALS COM 02043Q107 78,223 -4,577 -5.53 35,670 32.11 1.2907
2025-08-13 2025-06-30 13F ALNYLAM PHARMACEUTICALS COM 02043Q107 82,800 894 1.09 27,000 22.08 1.0343
2025-05-12 2025-03-31 13F ALNYLAM PHARMACEUTICALS COM 02043Q107 81,906 1,624 2.02 22,116 17.07 0.9642
2025-02-13 2024-12-31 13F ALNYLAM PHARMACEUTICALS COM 02043Q107 80,282 -20,141 -20.06 18,891 -31.60 0.7705
2024-11-13 2024-09-30 13F ALNYLAM PHARMACEUTICALS COM 02043Q107 100,423 6,198 6.58 27,619 20.63 1.1903
2024-08-13 2024-06-30 13F ALNYLAM PHARMACEUTICALS COM 02043Q107 94,225 29,001 44.46 22,897 134.90 1.0558
2024-05-14 2024-03-31 13F ALNYLAM PHARMACEUTICALS COM 02043Q107 65,224 -23,161 -26.20 9,748 -42.38 0.4663
2024-02-13 2023-12-31 13F ALNYLAM PHARMACEUTICALS COM 02043Q107 88,385 -4,571 -4.92 16,918 2.76 0.8675
2023-11-13 2023-09-30 13F ALNYLAM PHARMACEUTICALS COM 02043Q107 92,956 -625 -0.67 16,463 -7.38 0.9468
2023-08-11 2023-06-30 13F ALNYLAM PHARMACEUTICALS COM 02043Q107 93,581 0 0.00 17,775 -5.19 0.9961
2023-05-15 2023-03-31 13F ALNYLAM PHARMACEUTICALS COM 02043Q107 93,581 5,536 6.29 18,746 -10.40 1.1241
2023-02-14 2022-12-31 13F ALNYLAM PHARMACEUTICALS COM 02043Q107 88,045 20,030 29.45 20,924 53.69 1.4421
2022-11-14 2022-09-30 13F ALNYLAM PHARMACEUTICALS COM 02043Q107 68,015 22,023 47.88 13,614 102.95 0.9490
2022-08-15 2022-06-30 13F ALNYLAM PHARMACEUTICALS COM 02043Q107 45,992 24,153 110.60 6,708 88.11 0.5048
2022-05-19 2022-03-31 13F/A-1 ALNYLAM PHARMACEUTICALS COM 02043Q107 21,839 21,839 3,566 0.2032
2022-05-16 2022-03-31 13F ALNYLAM PHARMACEUTICALS COM 02043Q107 21,839 21,839 3,566 0.2052
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.