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Position history for DED. E. Shaw & Co., Inc.'s holdings in ALNYLAM PHARMACEUTICALS INC

Yes. D. E. Shaw holds 1,104,109 shares of ALNY (Alnylam Pharmaceuticals), worth $332.4M, as of its Q2 2026 13F filing. It increased the position by 45,047 shares (+4.3%) from Q1 2026. D. E. Shaw has held ALNY in every 13F on record since Q4 2018, 31 quarterly filings. ALNY is 0.2% of D. E. Shaw's reported 13F portfolio.

Current Value

$332.4M

Current Shares

1.1M

Total Value Change

+$241M

Total Shares Change

+771,804

Quarter-by-Quarter History
QuarterActionSharesChangeValueWeightPriceConviction
2026-Q2
Latest
Increased
1.1M
+4.3%
$332.4M0.2%$301.03
39
2026-Q1
Increased
1.1M
+138.3%
$350.4M0.2%$330.87
60
2025-Q4
Increased
444,493
+122.9%
$176.8M0.1%$397.65
49
2025-Q3
Increased
199,417
+84.2%
$90.9M0.1%$456.00
46
2025-Q2
Decreased
108,276
-62.6%
$35.3M0.0%$326.09
0
2025-Q1
Decreased
289,862
-20.2%
$78.3M0.1%$270.02
0
2024-Q4
Increased
363,085
+9.3%
$85.4M0.1%$235.31
33
2024-Q3
Increased
332,305
+18.9%
$91.4M0.1%$275.03
35

Other major holders of ALNY: FMR LLC, Capital World Investors, VANGUARD GROUP INC

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