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Ossiam’s Alnylam Pharmaceuticals ALNY Stock Holding History

Ossiam’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 		$7.47M Buy
24,821
+638
+3% +$192K 0.1% 137
2026
Q1 		$8M Buy
24,183
+22,397
+1,254% +$7.62M 0.14% 79
2025
Q4 		$710K Buy
1,786
+230
+15% +$102K 0.01% 253
2025
Q3 		$710K Buy
1,556
+201
+15% +$81.8K 0.01% 518
2025
Q2 		$442K Buy
1,355
+19
+1% +$5.26K 0.01% 481
2025
Q1 		$361K Sell
1,336
-1,091
-45% -$280K 0.01% 456
2024
Q4 		$571K Buy
2,427
+752
+45% +$198K 0.01% 438
2024
Q3 		$461K Buy
1,675
+509
+44% +$133K 0.01% 458
2024
Q2 		$283K Buy
1,166
+61
+6% +$9.63K 0.01% 511
2024
Q1 		$165K Sell
1,105
-882
-44% -$147K ﹤0.01% 572
2023
Q4 		$380K Hold
1,987
– – 0.01% 514
2023
Q3 		$352K Buy
1,987
+367
+23% +$70K 0.01% 526
2023
Q2 		$308K Buy
1,620
+783
+94% +$155K 0.01% 527
2023
Q1 		$168K Sell
837
-30
-3% -$6.31K ﹤0.01% 504
2022
Q4 		$206K Hold
867
– – 0.01% 474
2022
Q3 		$174K Buy
+867
New +$165K 0.01% 463
2021
Q3 		– Sell
-1,376
Closed -$246K – 438
2021
Q2 		$246K Buy
+1,376
New +$202K 0.01% 368
2019
Q4 		– Sell
-572
Closed -$46K – 476
2019
Q3 		$46K Buy
+572
New +$45.3K ﹤0.01% 430

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

Ossiam's ALNY Position: Q2 2026 in Review

Ossiam increased its Alnylam Pharmaceuticals (ALNY) stake by 2.6% in Q2 2026, buying an estimated $192K and bringing the position to 24,821 shares worth $7.47M. The position accounts for 0.1% of the portfolio, ranked #137.

Ossiam first reported a position in ALNY in Q3 2019 and has held it in 18 quarters since. The position peaked at $8M in Q1 2026. 790 funds tracked by Wall St. Rank hold ALNY as of Q2 2026.

  • Ossiam held 24,821 shares of Alnylam Pharmaceuticals worth $7.47M as of Q2 2026.
  • Ossiam bought 638 Alnylam Pharmaceuticals shares in Q2 2026, an estimated $192K.
  • Alnylam Pharmaceuticals made up 0.1% of Ossiam's portfolio in Q2 2026, its #137 holding.
  • Ossiam first reported a position in Alnylam Pharmaceuticals in Q3 2019 and has held it in 18 quarters since.
  • Ossiam's Alnylam Pharmaceuticals position peaked at $8M in Q1 2026.
  • 790 funds tracked by Wall St. Rank held Alnylam Pharmaceuticals as of Q2 2026.

Based on Ossiam's 13F filing for Q2 2026, filed 13 Aug 2026.