Alnylam Pharmaceuticals, Inc.
DE ˙ XTRA ˙ US02043Q1076
251,80 € ↑6,70 (2,73%)
2026-06-03
DEL PRIS
SecurityDE:DUL / Alnylam Pharmaceuticals, Inc.
InstitutionCi Investments Inc.
Latest Disclosed Ownership3,611 shares
Latest Disclosed Value $ 1,194,772
Ci Investments Inc. reports 40.33% decrease in ownership of DUL / Alnylam Pharmaceuticals, Inc.

On May 13, 2026 - Ci Investments Inc. filed a 13F-HR form disclosing ownership of 3,611 shares of Alnylam Pharmaceuticals, Inc. (DE:DUL) valued at $1,031,663 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 12, 2026 disclosing 6,052 shares of Alnylam Pharmaceuticals, Inc.. This represents a change in shares of -40.33% during the quarter. The current value of the position is $909,250 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 3,611 -2,441 -40.33 1,195 -50.37 0.0041
2026-02-12 2025-12-31 13F ALNYLAM PHARMACEUTICALS COM 02043Q107 6,052 -1,172 -16.22 2,407 80,100.00 0.0105
2025-11-12 2025-09-30 13F ALNYLAM PHARMACEUTICALS COM 02043Q107 7,224 3,109 75.55 3 200.00 0.0120
2025-08-12 2025-06-30 13F ALNYLAM PHARMACEUTICALS COM 02043Q107 4,115 1,894 85.28 1 0.0050
2025-05-13 2025-03-31 13F ALNYLAM PHARMACEUTICALS COM 02043Q107 2,221 -1,263 -36.25 1 0.0025
2025-02-12 2024-12-31 13F ALNYLAM PHARMACEUTICALS COM 02043Q107 3,484 -113 -3.14 1 0.0031
2024-11-12 2024-09-30 13F ALNYLAM PHARMACEUTICALS COM 02043Q107 3,597 -25 -0.69 1 0.0038
2024-08-12 2024-06-30 13F ALNYLAM PHARMACEUTICALS COM 02043Q107 3,622 -269 -6.91 1 0.0035
2024-05-13 2024-03-31 13F ALNYLAM PHARMACEUTICALS COM 02043Q107 3,891 1,540 65.50 1 0.0023
2024-02-12 2023-12-31 13F ALNYLAM PHARMACEUTICALS COM 02043Q107 2,351 -297 -11.22 0 0.0023
2023-11-13 2023-09-30 13F ALNYLAM PHARMACEUTICALS COM 02043Q107 2,648 -337 -11.29 0 0.0026
2023-08-11 2023-06-30 13F ALNYLAM PHARMACEUTICALS COM 02043Q107 2,985 1,355 83.13 1 0.0029
2023-05-12 2023-03-31 13F ALNYLAM PHARMACEUTICALS COM 02043Q107 1,630 891 120.57 0 0.0016
2023-02-10 2022-12-31 13F ALNYLAM PHARMACEUTICALS COM 02043Q107 739 345 87.56 0 -100.00 0.0009
2022-11-14 2022-09-30 13F ALNYLAM PHARMACEUTICALS COM 02043Q107 394 136 52.71 79 107.89 0.0004
2022-08-12 2022-06-30 13F ALNYLAM PHARMACEUTICALS COM 02043Q107 258 -434 -62.72 38 -66.37 0.0002
2022-05-12 2022-03-31 13F ALNYLAM PHARMACEUTICALS COM 02043Q107 692 49 7.62 113 3.67 0.0004
2022-02-11 2021-12-31 13F ALNYLAM PHARMACEUTICALS COM 02043Q107 643 126 24.37 109 11.22 0.0004
2021-11-12 2021-09-30 13F ALNYLAM PHARMACEUTICALS COM 02043Q107 517 517 98 0.0004
2020-11-09 2020-09-30 13F ALNYLAM PHARMACEUTICALS COM 02043Q107 0 -2,036 -100.00 0 -100.00
2020-08-07 2020-06-30 13F ALNYLAM PHARMACEUTICALS COM 02043Q107 2,036 2,036 -36.77 302 -18.60 0.0016
2020-08-07 2020-03-31 13F ALNYLAM PHARMACEUTICALS COM 02043Q107 0 -3,220 -100.00 0 -100.00
2020-02-11 2019-12-31 13F ALNYLAM PHARMACEUTICALS COM 02043Q107 3,220 3,220 371 0.0019
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.