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HBK Investments’s Alnylam Pharmaceuticals ALNY Stock Holding History

HBK Investments’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
2025
Q4 		– Sell
-1,231
Closed -$561K – 264
2025
Q3 		$561K Buy
+1,231
New +$501K 0.01% 220
2022
Q4 		– Sell
-19,975
Closed -$4M – 26
2022
Q3 		$4M Buy
+19,975
New +$3.81M 0.03% 221
2018
Q4 		– Sell
-13,131
Closed -$1.15M – 1175
2018
Q3 		$1.15M Sell
13,131
-369
-3% -$37.1K 0.01% 680
2018
Q2 		$1.33M Buy
+13,500
New +$1.34M 0.01% 572
2016
Q2 		– Sell
-49,293
Closed -$3.09M – 946
2016
Q1 		$3.09M Buy
49,293
+38,692
+365% +$2.57M 0.03% 347
2015
Q4 		$998K Sell
10,601
-8,599
-45% -$797K 0.01% 579
2015
Q3 		$1.54M Buy
19,200
+442
+2% +$49.1K 0.02% 472
2015
Q2 		$2.25M Sell
18,758
-34,503
-65% -$4.12M 0.02% 385
2015
Q1 		$5.56M Buy
53,261
+702
+1% +$71.1K 0.05% 214
2014
Q4 		$5.1M Buy
+52,559
New +$4.87M 0.06% 200
2014
Q3 		– Sell
-37,099
Closed -$2.34M – 949
2014
Q2 		$2.34M Sell
37,099
-27,801
-43% -$1.65M 0.05% 308
2014
Q1 		$4.36M Buy
64,900
+53,700
+479% +$4.16M 0.08% 191
2013
Q4 		$720K Buy
11,200
+6,650
+146% +$397K 0.01% 554
2013
Q3 		$291K Sell
4,550
-10,750
-70% -$536K ﹤0.01% 754
2013
Q2 		$474K Buy
+15,300
New +$407K 0.01% 582

Other funds holding ALNY

Capital World Investors
Capital World Investors Los Angeles, California $846B AUM 46.74% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return
Vanguard Group
Vanguard Group Malvern, Pennsylvania $6.9T AUM 27.45% 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
Invesco
Invesco Atlanta, Georgia $1.26T AUM 61.52% 1-Year Est. Return
JP Morgan Chase
JP Morgan Chase New York $1.81T AUM 41.13% 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
Baillie Gifford & Co
Baillie Gifford & Co Edinburgh, United Kingdom $110B AUM 4.8% 1-Year Est. Return

HBK Investments's ALNY Position: Q4 2025 in Review

HBK Investments sold out of Alnylam Pharmaceuticals (ALNY) in Q4 2025, closing a stake of 1,231 shares — an estimated $561K sold.

HBK Investments first reported a position in ALNY in Q2 2013 and held it in 15 quarters. The position peaked at $5.56M in Q1 2015. 851 funds tracked by Wall St. Rank hold ALNY as of Q4 2025.

  • HBK Investments reported no remaining Alnylam Pharmaceuticals position as of Q4 2025 after selling out during the quarter.
  • HBK Investments sold 1,231 Alnylam Pharmaceuticals shares in Q4 2025, an estimated $561K.
  • HBK Investments first reported a position in Alnylam Pharmaceuticals in Q2 2013 and held it in 15 quarters.
  • HBK Investments's Alnylam Pharmaceuticals position peaked at $5.56M in Q1 2015.
  • 851 funds tracked by Wall St. Rank held Alnylam Pharmaceuticals as of Q4 2025.

Based on HBK Investments's 13F filing for Q4 2025, filed 17 Feb 2026.