TCW Group
ALNY icon

TCW Group’s Alnylam Pharmaceuticals ALNY Stock Holding History

TCW Group’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
2026
Q3 		$554K Buy
2,245
+9
+0.4% +$2.29K ﹤0.01% 425
2026
Q2 		$673K Buy
2,236
+134
+6% +$40.4K ﹤0.01% 439
2026
Q1 		$695K Buy
2,102
+102
+5% +$34.7K 0.01% 418
2025
Q4 		$795K Buy
+2,000
New +$885K 0.01% 397
2020
Q4 		– Sell
-33,005
Closed -$4.81M – 332
2020
Q3 		$4.81M Sell
33,005
-6,038
-15% -$858K 0.05% 173
2020
Q2 		$5.78M Sell
39,043
-366
-0.9% -$49.3K 0.07% 154
2020
Q1 		$4.29M Buy
+39,409
New +$4.55M 0.06% 162

Other funds holding ALNY

Capital World Investors
Capital World Investors Los Angeles, California $824B AUM 37.44% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $2.32T AUM 44.66% 1-Year Est. Return
BlackRock
BlackRock New York $6.79T AUM 37.06% 1-Year Est. Return
Capital Research Global Investors
Capital Research Global Investors Los Angeles, California $704B AUM 26.74% 1-Year Est. Return
Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.21T AUM
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.76T AUM
Baillie Gifford & Co
Baillie Gifford & Co Edinburgh, United Kingdom $106B AUM 2.29% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.44T AUM 36.12% 1-Year Est. Return
Invesco
Invesco Atlanta, Georgia $1.27T AUM 50.62% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.92T AUM 36.1% 1-Year Est. Return

TCW Group's ALNY Position: Q3 2026 in Review

TCW Group increased its Alnylam Pharmaceuticals (ALNY) stake by 0.4% in Q3 2026, buying an estimated $2.29K and bringing the position to 2,245 shares worth $554K. The position accounts for ﹤0.01% of the portfolio, ranked #425.

TCW Group first reported a position in ALNY in Q1 2020 and has held it in 7 quarters since. The position peaked at $5.78M in Q2 2020. 591 funds tracked by Wall St. Rank hold ALNY as of Q3 2026.

  • TCW Group held 2,245 shares of Alnylam Pharmaceuticals worth $554K as of Q3 2026.
  • TCW Group bought 9 Alnylam Pharmaceuticals shares in Q3 2026, an estimated $2.29K.
  • Alnylam Pharmaceuticals made up ﹤0.01% of TCW Group's portfolio in Q3 2026, its #425 holding.
  • TCW Group first reported a position in Alnylam Pharmaceuticals in Q1 2020 and has held it in 7 quarters since.
  • TCW Group's Alnylam Pharmaceuticals position peaked at $5.78M in Q2 2020.
  • 591 funds tracked by Wall St. Rank held Alnylam Pharmaceuticals as of Q3 2026.

Based on TCW Group's 13F filing for Q3 2026, filed 10 Nov 2026.