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CONGRESS ASSET MANAGEMENT CO

Position in ALNY — Alnylam Pharmaceuticals, Inc.

CIK 897378 BOSTON, MA

Position in ALNY

as of Jun 30, 2026 · filed Jul 7, 2026
Position Value
$79,983,972
-$14,558,490 QoQ
Shares Held
265,701
-7.0% QoQ
Ownership
0.199%
of shares outstanding
% of Portfolio
0.50%
of 13F equity value
Holder Rank
#61
of 780 holders
Holding Since
Sep 2025
4 quarters on record
Voting authority Sole 81% Shared 9% None 9%

Common Shares in ALNY Over Time

Shares Held

Position Value (USD)

Position in Biotechnology

Healthcare · as of Jun 30, 2026

CONGRESS ASSET MANAGEMENT CO holds $715,705,658 across 14 Biotechnology names. ALNY ranks #5 (11.2% of the industry book) .

# Ticker Company Shares Value (USD) Open
5 ALNY
Alnylam Pharmaceuticals, Inc.
This page
265,701 $79,983,972

All Filings in ALNY

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4 filing rows on record
Report Date Value (USD) Shares
2026-06-30 $79,983,972 265,701
2026-03-31 $94,542,462 285,739
2025-12-31 $107,062,888 269,239
2025-09-30 $54,172,800 118,800