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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

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

Two Sigma Securities's ALNY Position: Q2 2026 in Review

Two Sigma Securities opened a new position in Alnylam Pharmaceuticals (ALNY) in Q2 2026: 5,585 shares worth $1.68M. The stake represents 0.15% of the portfolio and ranks #143 among its holdings. This is a return to the name: Two Sigma Securities previously reported a position in ALNY as recently as Q3 2025.

Two Sigma Securities first reported a position in ALNY in Q2 2017 and has held it in 17 quarters since. The position peaked at $13.2M in Q2 2024. 790 funds tracked by Wall St. Rank hold ALNY as of Q2 2026.

  • Two Sigma Securities held 5,585 shares of Alnylam Pharmaceuticals worth $1.68M as of Q2 2026.
  • Alnylam Pharmaceuticals was a new Two Sigma Securities position in Q2 2026.
  • Alnylam Pharmaceuticals made up 0.15% of Two Sigma Securities's portfolio in Q2 2026, its #143 holding.
  • Two Sigma Securities first reported a position in Alnylam Pharmaceuticals in Q2 2017 and has held it in 17 quarters since.
  • Two Sigma Securities's Alnylam Pharmaceuticals position peaked at $13.2M in Q2 2024.
  • 790 funds tracked by Wall St. Rank held Alnylam Pharmaceuticals as of Q2 2026.

Based on Two Sigma Securities's 13F filing for Q2 2026, filed 14 Aug 2026.