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Alnylam Pharmaceuticals

649 hedge funds and large institutions have $43.1B invested in Alnylam Pharmaceuticals in 2025 Q2 according to their latest regulatory filings, with 96 funds opening new positions, 261 increasing their positions, 214 reducing their positions, and 62 closing their positions.

New
Increased
Maintained
Reduced
Closed

more first-time investments, than exits

New positions opened: | Existing positions closed:

more capital invested

Capital invested by funds: $ → $

more repeat investments, than reductions

Existing positions increased: | Existing positions reduced:

more funds holding

Funds holding:

3.44% more ownership

Funds ownership: 97.84%101.28% (+3.4%)

8% less call options, than puts

Call options by funds: $188M | Put options by funds: $203M

10% less funds holding in top 10

Funds holding in top 10: 109 (-1)

Holders
649
Holders Change
Holders Change %
% of All Funds
Holding in Top 10
9
Holding in Top 10 Change
Holding in Top 10 Change %
% of All Funds
New
Increased
Reduced
Closed
Calls
$188M
Puts
$203M
Net Calls
Net Calls Change
Name Holding Trade Value Shares
Change
Change in
Stake
326
$1.17M
327
$1.15M
328
$1.14M
329
$1.14M
330
$1.13M
331
$1.12M
332
$1.1M
333
$1.08M
334
$1.08M
335
$1.06M
336
$1.06M
337
$1.05M
338
$1.03M
339
$1.03M
340
$995K
341
$984K
342
$973K
343
$968K
344
$956K
345
$951K
346
$948K
347
$946K
348
$930K
349
$925K
350
$916K