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Alnylam Pharmaceuticals

650 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, 262 increasing their positions, 214 reducing their positions, and 63 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: 97.86%101.3% (+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
650
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
276
$2.12M
277
$2.12M
278
$2.1M
279
$2.09M
280
$2.05M
281
$2M
282
$2M
283
$1.98M
284
$1.96M
285
$1.92M
286
$1.9M
287
$1.87M
288
$1.86M
289
$1.86M
290
$1.82M
291
$1.8M
292
$1.78M
293
$1.77M
294
$1.75M
295
$1.73M
296
$1.73M
297
$1.7M
298
$1.68M
299
$1.63M
300
$1.57M