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Regeneron Pharmaceuticals’s Alnylam Pharmaceuticals ALNY Stock Holding History

Regeneron Pharmaceuticals’s Portfolio ALNY Stock Details ALNY Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2025
Q4 		– Sell
-1,392,303
Closed -$635M – 4
2025
Q3 		$635M Sell
1,392,303
-3,052,142
-69% -$1.24B 90.64% 1
2025
Q2 		$1.45B Hold
4,444,445
– – 97.6% 1
2025
Q1 		$1.2B Hold
4,444,445
– – 97.23% 1
2024
Q4 		$1.05B Buy
+4,444,445
New +$1.17B 95.54% 1

Other funds holding ALNY

Capital World Investors
Capital World Investors Los Angeles, California $846B AUM 46.74% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return
Vanguard Group
Vanguard Group Malvern, Pennsylvania $6.9T AUM 27.45% 1-Year Est. Return
BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Capital Research Global Investors
Capital Research Global Investors Los Angeles, California $717B AUM 35.42% 1-Year Est. Return
Invesco
Invesco Atlanta, Georgia $1.26T AUM 61.52% 1-Year Est. Return
JP Morgan Chase
JP Morgan Chase New York $1.81T AUM 41.13% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return
Baillie Gifford & Co
Baillie Gifford & Co Edinburgh, United Kingdom $110B AUM 4.8% 1-Year Est. Return

Regeneron Pharmaceuticals's ALNY Position: Q4 2025 in Review

Regeneron Pharmaceuticals sold out of Alnylam Pharmaceuticals (ALNY) in Q4 2025, closing a stake of 1,392,303 shares — an estimated $635M sold.

Regeneron Pharmaceuticals first reported a position in ALNY in Q4 2024 and held it in 4 quarters. The position peaked at $1.45B in Q2 2025. 851 funds tracked by Wall St. Rank hold ALNY as of Q4 2025.

  • Regeneron Pharmaceuticals reported no remaining Alnylam Pharmaceuticals position as of Q4 2025 after selling out during the quarter.
  • Regeneron Pharmaceuticals sold 1,392,303 Alnylam Pharmaceuticals shares in Q4 2025, an estimated $635M.
  • Regeneron Pharmaceuticals first reported a position in Alnylam Pharmaceuticals in Q4 2024 and held it in 4 quarters.
  • Regeneron Pharmaceuticals's Alnylam Pharmaceuticals position peaked at $1.45B in Q2 2025.
  • 851 funds tracked by Wall St. Rank held Alnylam Pharmaceuticals as of Q4 2025.

Based on Regeneron Pharmaceuticals's 13F filing for Q4 2025, filed 6 Feb 2026.