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
-3,641
Closed -$1.24M – 1257
2025
Q4 		$1.45M Sell
3,641
-12,364
-77% -$5.47M 0.01% 915
2025
Q3 		$7.3M Buy
+16,005
New +$6.52M 0.03% 621
2025
Q2 		– Sell
-7,074
Closed -$1.96M – 1577
2025
Q1 		$1.91M Buy
+7,074
New +$1.82M ﹤0.01% 1152
2024
Q3 		– Sell
-43,749
Closed -$11.4M – 1487
2024
Q2 		$10.6M Buy
43,749
+28,239
+182% +$4.46M 0.02% 564
2024
Q1 		$2.32M Buy
+15,510
New +$2.59M 0.01% 969
2023
Q4 		– Sell
-6,289
Closed -$1.07M – 1354
2023
Q3 		$1.11M Buy
+6,289
New +$1.2M ﹤0.01% 960
2022
Q4 		– Sell
-72,861
Closed -$15.5M – 1261
2022
Q3 		$14.6M Buy
72,861
+63,421
+672% +$12.1M 0.03% 452
2022
Q2 		$1.38M Sell
9,440
-22,344
-70% -$3.17M ﹤0.01% 1155
2022
Q1 		$5.19M Buy
+31,784
New +$4.84M 0.01% 915
2021
Q3 		– Sell
-16,500
Closed -$3.1M – 1540
2021
Q2 		$2.8M Buy
+16,500
New +$2.42M 0.01% 818
2020
Q4 		– Sell
-134
Closed -$20K – 1256
2020
Q3 		$20K Buy
134
+117
+688% +$16.6K ﹤0.01% 1141
2020
Q2 		$3K Buy
+17
New +$2.29K ﹤0.01% 1416
2019
Q1 		– Sell
-5,919
Closed -$495K – 1295
2018
Q4 		$432K Sell
5,919
-18,788
-76% -$1.45M ﹤0.01% 987
2018
Q3 		$2.16M Buy
24,707
+16,180
+190% +$1.63M 0.01% 574
2018
Q2 		$840K Buy
+8,527
New +$846K 0.01% 812

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

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. 793 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.
  • 793 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.