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Ionis Pharmaceuticals

339 hedge funds and large institutions have $5.01B invested in Ionis Pharmaceuticals in 2025 Q1 according to their latest regulatory filings, with 53 funds opening new positions, 103 increasing their positions, 122 reducing their positions, and 61 closing their positions.

New
Increased
Maintained
Reduced
Closed

more funds holding in top 10

Funds holding in top 10:

more call options, than puts

Call options by funds: $ | Put options by funds: $

more ownership

Funds ownership:

less funds holding

Funds holding:

11% less capital invested

Capital invested by funds: $5.61B → $5.01B (-$606M)

13% less first-time investments, than exits

New positions opened: 53 | Existing positions closed: 61

16% less repeat investments, than reductions

Existing positions increased: 103 | Existing positions reduced: 122

Holders
339
Holders Change
Holders Change %
% of All Funds
Holding in Top 10
6
Holding in Top 10 Change
Holding in Top 10 Change %
% of All Funds
New
Increased
Reduced
Closed
Calls
$24.8M
Puts
$18.8M
Net Calls
Net Calls Change

Top Buyers

1 +$79.4M
2 +$60.5M
3 +$57.7M
4
Citadel Advisors
Citadel Advisors
Florida
+$39.6M
5
Fidelity Investments
Fidelity Investments
Massachusetts
+$27.9M
Name Holding Trade Value Shares
Change
Change in
Stake
201
$311K
202
$309K
203
$303K
204
$302K
205
$301K
206
$298K
207
$297K
208
$293K
209
$285K
210
$282K
211
$276K
212
$275K
213
$259K
214
$257K
215
$256K
216
$256K
217
$253K
218
$250K
219
$248K
220
$243K
221
$233K
222
$228K
223
$219K
224
$216K
225
$211K