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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
301
$1.53M
302
$1.51M
303
$1.49M
304
$1.48M
305
$1.48M
306
$1.47M
307
$1.44M
308
$1.44M
309
$1.41M
310
$1.4M
311
$1.39M
312
$1.38M
313
$1.38M
314
$1.38M
315
$1.34M
316
$1.34M
317
$1.34M
318
$1.33M
319
$1.31M
320
$1.3M
321
$1.3M
322
$1.29M
323
$1.28M
324
$1.28M
325
$1.2M