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Two Sigma Securities’s Alnylam Pharmaceuticals ALNY Stock Holding History

Two Sigma Securities’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
2024
Q4 		– Sell
-3,700
Closed -$1.02M – 1636
2024
Q3 		$1.02M Sell
3,700
-6,300
-63% -$1.64M 0.02% 876
2024
Q2 		$2.43M Sell
10,000
-200
-2% -$31.6K 0.03% 628
2024
Q1 		$1.52M Sell
10,200
-300
-3% -$50K 0.01% 898
2023
Q4 		$2.01M Buy
10,500
+8,500
+425% +$1.45M 0.02% 695
2023
Q3 		$354K Buy
2,000
+400
+25% +$76.3K ﹤0.01% 1804
2023
Q2 		$304K Buy
+1,600
New +$317K ﹤0.01% 1859
2023
Q1 		– Sell
-900
Closed -$214K – 2607
2022
Q4 		$214K Sell
900
-500
-36% -$107K 0.01% 1894
2022
Q3 		$280K Buy
+1,400
New +$267K 0.01% 1639
2022
Q2 		– Sell
-4,200
Closed -$686K – 2182
2022
Q1 		$686K Buy
+4,200
New +$640K 0.02% 809
2021
Q1 		– Sell
-2,100
Closed -$273K – 834
2020
Q4 		$273K Hold
2,100
– – 0.01% 1120
2020
Q3 		$306K Buy
+2,100
New +$298K 0.01% 854
2020
Q1 		– Sell
-5,100
Closed -$587K – 1323
2019
Q4 		$587K Buy
+5,100
New +$508K ﹤0.01% 1352
2019
Q2 		– Sell
-3,900
Closed -$364K – 2051
2019
Q1 		$364K Buy
+3,900
New +$326K ﹤0.01% 1055
2018
Q4 		– Sell
-9,000
Closed -$788K – 2109
2018
Q3 		$788K Buy
9,000
+2,000
+29% +$201K 0.01% 1143
2018
Q2 		$689K Sell
7,000
-11,900
-63% -$1.18M ﹤0.01% 1583
2018
Q1 		$2.25M Buy
18,900
+11,600
+159% +$1.5M 0.01% 799
2017
Q4 		$927K Buy
+7,300
New +$917K 0.02% 442

Other funds holding ALNY

Capital World Investors
Capital World Investors Los Angeles, California $733B AUM 35.63% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return
Vanguard Group
Vanguard Group Malvern, Pennsylvania $6.9T AUM 27.45% 1-Year Est. Return
BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
Capital Research Global Investors
Capital Research Global Investors Los Angeles, California $645B AUM 30.41% 1-Year Est. Return
Invesco
Invesco Atlanta, Georgia $1.02T AUM 30.18% 1-Year Est. Return
JP Morgan Chase
JP Morgan Chase New York $1.56T AUM 27.86% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return
Baillie Gifford & Co
Baillie Gifford & Co Edinburgh, United Kingdom $97.9B AUM 20.73% 1-Year Est. Return

Two Sigma Securities's ALNY Position: Q4 2025 in Review

Two Sigma Securities sold out of Alnylam Pharmaceuticals (ALNY) in Q4 2025, closing a stake of 1,740 shares — an estimated $793K sold.

Two Sigma Securities first reported a position in ALNY in Q2 2017 and held it in 16 quarters. The position peaked at $13.2M in Q2 2024. 848 funds tracked by Wall St. Rank hold ALNY as of Q4 2025.

  • Two Sigma Securities reported no remaining Alnylam Pharmaceuticals position as of Q4 2025 after selling out during the quarter.
  • Two Sigma Securities sold 1,740 Alnylam Pharmaceuticals shares in Q4 2025, an estimated $793K.
  • Two Sigma Securities first reported a position in Alnylam Pharmaceuticals in Q2 2017 and held it in 16 quarters.
  • Two Sigma Securities's Alnylam Pharmaceuticals position peaked at $13.2M in Q2 2024.
  • 848 funds tracked by Wall St. Rank held Alnylam Pharmaceuticals as of Q4 2025.

Based on Two Sigma Securities's 13F filing for Q4 2025, filed 17 Feb 2026.