Institutional Ownership Ionis Pharmaceuticals Inc (IONS)
This table provides information about the institutional ownership of Ionis Pharmaceuticals Inc (IONS). We have compiled data on the 507 institutions that hold shares in the stock, with a total of 155 Million shares, which have been reported (via 13F filing form) to have a value of $11.1 Billion.
| Holding | Report Date | shares Held | Holding Value (Reported) | Last Trade | Trade History |
|---|---|---|---|---|---|
|
Baker Bros. Advisors LP
New York, NY |
Nov 14, 2025 Q3 2025 |
566,798
shares
|
$40.6 Million
0.3% of portfolio
|
Q3 2025
New holding
|
|
|
Tang Capital Management LLC
San Diego, CA |
Nov 14, 2025 Q3 2025 |
550,000
shares
|
$39.4 Million
1.64% of portfolio
|
Q3 2025
Added 266.67%
|
|
|
Jpmorgan Chase & CO
New York, NY |
Nov 26, 2025 Q3 2025 |
544,468
shares
|
$39 Million
0.0% of portfolio
|
Q3 2025
Added 29.17%
|
|
|
Eversept Partners, LP
New York, NY |
Nov 14, 2025 Q3 2025 |
538,661
shares
|
$38.5 Million
2.73% of portfolio
|
Q3 2025
Reduced 8.53%
|
|
|
Invesco Ltd.
Atlanta, GA |
Nov 13, 2025 Q3 2025 |
519,070
shares
|
$37.1 Million
0.01% of portfolio
|
Q3 2025
Added 102.58%
|
|
|
Hudson Bay Capital Management LP
Greenwich, CT |
Dec 15, 2025 Q3 2025 |
515,000
shares
|
$36.8 Million
0.13% of portfolio
|
Q3 2025
Reduced 31.33%
|
|
|
Jim Simons
Renaissance Technologies LLC | New York, Ny
|
Nov 13, 2025 Q3 2025 |
486,714
shares
|
$34.8 Million
0.05% of portfolio
|
Q3 2025
Added 79.79%
|
|
|
Pinnacle Associates LTD
|
Nov 12, 2025 Q3 2025 |
481,751
shares
|
$34.5 Million
0.44% of portfolio
|
Q3 2025
Reduced 2.59%
|
|
|
Teacher Retirement System Of Texas
Austin, TX |
Oct 30, 2025 Q3 2025 |
473,945
shares
|
$33.9 Million
0.13% of portfolio
|
Q3 2025
Reduced 29.08%
|
|
|
C World Wide Group Holding A
|
Nov 05, 2025 Q3 2025 |
426,000
shares
|
$30.5 Million
0.43% of portfolio
|
Q3 2025
Reduced 5.33%
|
|
|
Susquehanna International Group, LLP
Bala Cynwyd, PA |
Nov 14, 2025 Q3 2025 |
420,950
shares
|
$30.1 Million
0.0% of portfolio
|
Q3 2025
New holding
|
|
|
Boone Capital Management LLC
Atlanta, GA |
Nov 14, 2025 Q3 2025 |
417,833
shares
|
$29.9 Million
8.96% of portfolio
|
Q3 2025
New holding
|
|
|
Nuveen, LLC
Charlotte, NC |
Nov 12, 2025 Q3 2025 |
415,618
shares
|
$29.7 Million
0.01% of portfolio
|
Q3 2025
Added 69.58%
|
|
|
Ikarian Capital, LLC
Dallas, TX |
Nov 14, 2025 Q3 2025 |
415,163
shares
|
$29.7 Million
4.25% of portfolio
|
Q3 2025
New holding
|
|
|
Axa Investment Managers S.A.
Puteaux, I0 |
Nov 14, 2025 Q3 2025 |
406,451
shares
|
$29.1 Million
0.07% of portfolio
|
Q3 2025
New holding
|
|
|
Squarepoint Ops LLC
New York, NY |
Nov 14, 2025 Q3 2025 |
383,792
shares
|
$27.5 Million
0.03% of portfolio
|
Q3 2025
Added 185.57%
|
|
|
Jane Street Group, LLC
New York, NY |
Nov 13, 2025 Q3 2025 |
365,070
shares
|
$26.1 Million
0.0% of portfolio
|
Q3 2025
New holding
|
|
|
Man Group PLC
London, X0 |
Nov 14, 2025 Q3 2025 |
333,820
shares
|
$23.9 Million
0.04% of portfolio
|
Q3 2025
Added 3621.93%
|
|
|
Legal & General Group PLC
London, X0 |
Nov 13, 2025 Q3 2025 |
319,565
shares
|
$22.9 Million
0.0% of portfolio
|
Q3 2025
Reduced 20.97%
|
|
|
Assenagon Asset Management S.A.
|
Oct 07, 2025 Q3 2025 |
312,297
shares
|
$22.3 Million
0.03% of portfolio
|
Q3 2025
Added 1668.99%
|
|
|
Alyeska Investment Group, L.P.
Chicago, IL |
Nov 14, 2025 Q3 2025 |
311,258
shares
|
$22.3 Million
0.07% of portfolio
|
Q3 2025
Added 95.75%
|
|
|
Rhenman & Partners Asset Management Ab
Stockholm, V7 |
Nov 13, 2025 Q3 2025 |
310,000
shares
|
$22.2 Million
2.38% of portfolio
|
Q3 2025
Added 70.33%
|
|
|
Dowling & Yahnke LLC
San Diego, CA |
Nov 02, 2022 Q3 2022 |
302,571
shares
|
$21.6 Million
6.23% of portfolio
|
Q1 2022
Added 0.05%
|
|
|
Swiss National Bank
Zurich, V8 |
Nov 13, 2025 Q3 2025 |
293,100
shares
|
$21 Million
0.01% of portfolio
|
Q3 2025
Added 6.47%
|
|
|
Nuveen Asset Management, LLC
Chicago, IL |
Feb 14, 2025 Q4 2024 |
290,954
shares
|
$20.8 Million
0.0% of portfolio
|
Q4 2024
Reduced 4.54%
|
|