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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
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

Fidelity Investments
Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return
Capital World Investors
Capital World Investors Los Angeles, California $846B AUM 46.74% 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
Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
T. Rowe Price Investment Management
T. Rowe Price Investment Management Baltimore, Maryland $153B AUM 38.14% 1-Year Est. Return
Invesco
Invesco Atlanta, Georgia $1.26T AUM 61.52% 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

TCW Group's ALNY Position: Q2 2026 in Review

TCW Group increased its Alnylam Pharmaceuticals (ALNY) stake by 6.4% in Q2 2026, buying an estimated $40.4K and bringing the position to 2,236 shares worth $673K. The position accounts for ﹤0.01% of the portfolio, ranked #439.

TCW Group first reported a position in ALNY in Q1 2020 and has held it in 6 quarters since. The position peaked at $5.78M in Q2 2020. 790 funds tracked by Wall St. Rank hold ALNY as of Q2 2026.

  • TCW Group held 2,236 shares of Alnylam Pharmaceuticals worth $673K as of Q2 2026.
  • TCW Group bought 134 Alnylam Pharmaceuticals shares in Q2 2026, an estimated $40.4K.
  • Alnylam Pharmaceuticals made up ﹤0.01% of TCW Group's portfolio in Q2 2026, its #439 holding.
  • TCW Group first reported a position in Alnylam Pharmaceuticals in Q1 2020 and has held it in 6 quarters since.
  • TCW Group's Alnylam Pharmaceuticals position peaked at $5.78M in Q2 2020.
  • 790 funds tracked by Wall St. Rank held Alnylam Pharmaceuticals as of Q2 2026.

Based on TCW Group's 13F filing for Q2 2026, filed 3 Aug 2026.