ALNY — ALNYLAM PHARMACEUTICALS INC

Ownership history in Holocene Advisors, LP  ·  16 quarters on record

This page tracks every 13F SEC filing in which Holocene Advisors, LP reported a position in ALNYLAM PHARMACEUTICALS INC (ALNY). Data includes quarterly share count, position size as % of portfolio, estimated market value, and end-of-quarter stock price — sourced directly from SEC EDGAR 13F filings.

Peak position
0.87% (2022 Q4)
Avg. % of fund
0.46%
First filed
2019 Q3
Last filed
2025 Q3
Quarters held
16
Quarter Action Shares Change Chg % % of Fund Mkt Value Price (EOQ)
2025 Q3 REDUCED 13,086 -583,730 -97.8% 0.01% $6.0M $456.00
2025 Q2 ADDED 596,816 +577,269 +2953.2% 0.47% $194.6M $326.09
2023 Q1 REDUCED 19,547 -579,253 -96.7% 0.02% $3.9M $200.32
2022 Q4 REDUCED 598,800 -128 -0.0% 0.87% $142.3M $237.65
12 older quarters hidden  —  Sign in free or upgrade to Premium to see full history
% of Fund (quarterly)    ALNY price (monthly, adj. close)

Other funds also holding ALNY

As of 2025 Q4 — sorted by position size

FengHe Fund Management Pte. Ltd. 3Y 4.9% Bellevue Group AG 3Y 7Y 3.36% ROSENBLUM SILVERMAN SUTTON S F INC /CA 3Y 7Y 3.05% Orbis Allan Gray Ltd 3Y 7Y 2.7% 683 Capital Management, LLC 3Y 7Y 2.44% Avidity Partners Management LP 3Y 2.41% ORBIMED ADVISORS LLC 3Y 7Y 2.34% Polymer Capital Management (HK) LTD 2.08% Casdin Capital, LLC 3Y 7Y 1.85% Parkman Healthcare Partners LLC 3Y 1.81%
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