Twin Tree Management
ALNY icon

Twin Tree Management’s Alnylam Pharmaceuticals ALNY Stock Holding History

Twin Tree Management’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
Q1 		– Sell
-22,000
Closed -$8.75M – 1258
2025
Q4 		$8.75M Buy
22,000
+13,100
+147% +$5.8M 0.08% 330
2025
Q3 		$4.06M Sell
8,900
-13,000
-59% -$5.29M 0.02% 818
2025
Q2 		$7.14M Sell
21,900
-27,900
-56% -$7.72M 0.01% 892
2025
Q1 		$13.4M Buy
49,800
+43,300
+666% +$11.1M 0.03% 564
2024
Q4 		$1.53M Sell
6,500
-46,600
-88% -$12.3M ﹤0.01% 1208
2024
Q3 		$14.6M Buy
53,100
+41,700
+366% +$10.9M 0.03% 512
2024
Q2 		$2.77M Sell
11,400
-11,800
-51% -$1.86M 0.01% 894
2024
Q1 		$3.47M Buy
+23,200
New +$3.87M 0.01% 896
2023
Q4 		– Sell
-7,900
Closed -$1.4M – 1355
2023
Q3 		$1.4M Buy
+7,900
New +$1.51M ﹤0.01% 921
2023
Q1 		– Sell
-323,600
Closed -$76.9M – 1258
2022
Q4 		$76.9M Sell
323,600
-77,500
-19% -$16.5M 0.17% 104
2022
Q3 		$80.3M Buy
401,100
+397,500
+11,042% +$75.8M 0.15% 97
2022
Q2 		$525K Sell
3,600
-97,900
-96% -$13.9M ﹤0.01% 1284
2022
Q1 		$16.6M Buy
+101,500
New +$15.5M 0.03% 540
2021
Q4 		– Sell
-10,000
Closed -$1.89M – 1568
2021
Q3 		$1.89M Buy
10,000
+8,500
+567% +$1.59M ﹤0.01% 1041
2021
Q2 		$254K Buy
+1,500
New +$220K ﹤0.01% 1170
2020
Q4 		– Sell
-2,200
Closed -$320K – 1257
2020
Q3 		$320K Buy
+2,200
New +$313K ﹤0.01% 1005
2019
Q2 		– Sell
-1,400
Closed -$131K – 1219
2019
Q1 		$131K Sell
1,400
-6,200
-82% -$519K ﹤0.01% 1070
2018
Q4 		$554K Sell
7,600
-47,600
-86% -$3.66M ﹤0.01% 955
2018
Q3 		$4.83M Buy
55,200
+45,700
+481% +$4.6M 0.03% 405
2018
Q2 		$936K Hold
9,500
– – 0.01% 791
2018
Q1 		$1.13M Buy
9,500
+5,900
+164% +$761K 0.01% 642
2017
Q4 		$457K Hold
3,600
– – ﹤0.01% 806
2017
Q3 		$423K Buy
+3,600
New +$307K ﹤0.01% 774

Other funds holding ALNY

Fidelity Investments
Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return
Capital World Investors
Capital World Investors Los Angeles, California $733B AUM 35.63% 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
VPM
Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM
JP Morgan Chase
JP Morgan Chase New York $1.56T AUM 27.86% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
T. Rowe Price Investment Management
T. Rowe Price Investment Management Baltimore, Maryland $145B AUM 22.78% 1-Year Est. Return
Invesco
Invesco Atlanta, Georgia $1.02T AUM 30.18% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return

Twin Tree Management's ALNY Position: Q1 2026 in Review

Twin Tree Management sold out of Alnylam Pharmaceuticals (ALNY) in Q1 2026, closing a stake of 3,641 shares — an estimated $1.24M sold.

Twin Tree Management first reported a position in ALNY in Q2 2018 and held it in 15 quarters. The position peaked at $14.6M in Q3 2022. 786 funds tracked by Wall St. Rank hold ALNY as of Q1 2026.

  • Twin Tree Management reported no remaining Alnylam Pharmaceuticals position as of Q1 2026 after selling out during the quarter.
  • Twin Tree Management sold 3,641 Alnylam Pharmaceuticals shares in Q1 2026, an estimated $1.24M.
  • Twin Tree Management first reported a position in Alnylam Pharmaceuticals in Q2 2018 and held it in 15 quarters.
  • Twin Tree Management's Alnylam Pharmaceuticals position peaked at $14.6M in Q3 2022.
  • 786 funds tracked by Wall St. Rank held Alnylam Pharmaceuticals as of Q1 2026.

Based on Twin Tree Management's 13F filing for Q1 2026, filed 14 May 2026.