XT
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XTX Topco’s Alnylam Pharmaceuticals ALNY Stock Holding History

XTX Topco’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 		$1.75M Buy
+5,810
New +$1.75M 0.02% 1249
2026
Q1 		– Sell
-1,856
Closed -$738K – 3797
2025
Q4 		$738K Buy
1,856
+1,022
+123% +$452K 0.02% 1269
2025
Q3 		$380K Buy
+834
New +$340K 0.02% 1306
2025
Q2 		– Sell
-1,488
Closed -$402K – 2310
2025
Q1 		$402K Buy
+1,488
New +$382K 0.02% 1190
2024
Q3 		– Sell
-1,480
Closed -$360K – 2046
2024
Q2 		$360K Sell
1,480
-3,325
-69% -$525K 0.03% 846
2024
Q1 		$718K Buy
+4,805
New +$802K 0.1% 286
2023
Q4 		– Sell
-8,836
Closed -$1.56M – 1543
2023
Q3 		$1.56M Buy
8,836
+4,332
+96% +$827K 0.27% 27
2023
Q2 		$855K Buy
+4,504
New +$893K 0.15% 132
2022
Q4 		– Sell
-3,884
Closed -$777K – 1091
2022
Q3 		$777K Buy
+3,884
New +$741K 0.19% 91
2022
Q2 		– Sell
-1,497
Closed -$244K – 828
2022
Q1 		$244K Buy
+1,497
New +$228K 0.11% 341

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

XTX Topco's ALNY Position: Q2 2026 in Review

XTX Topco opened a new position in Alnylam Pharmaceuticals (ALNY) in Q2 2026: 5,810 shares worth $1.75M. The stake represents 0.02% of the portfolio and ranks #1249 among its holdings. This is a return to the name: XTX Topco previously reported a position in ALNY as recently as Q4 2025.

XTX Topco first reported a position in ALNY in Q1 2022 and has held it in 10 quarters since. 788 funds tracked by Wall St. Rank hold ALNY as of Q2 2026.

  • XTX Topco held 5,810 shares of Alnylam Pharmaceuticals worth $1.75M as of Q2 2026.
  • Alnylam Pharmaceuticals was a new XTX Topco position in Q2 2026.
  • Alnylam Pharmaceuticals made up 0.02% of XTX Topco's portfolio in Q2 2026, its #1249 holding.
  • XTX Topco first reported a position in Alnylam Pharmaceuticals in Q1 2022 and has held it in 10 quarters since.
  • 788 funds tracked by Wall St. Rank held Alnylam Pharmaceuticals as of Q2 2026.

Based on XTX Topco's 13F filing for Q2 2026, filed 14 Aug 2026.