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 508 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 |
|---|---|---|---|---|---|
|
Vanguard Group Inc
Valley Forge, PA |
Nov 07, 2025 Q3 2025 |
16,481,730
shares
|
$1.18 Billion
0.02% of portfolio
|
Q3 2025
Reduced 1.39%
|
|
|
T. Rowe Price Investment Management, Inc.
Baltimore, MD |
Nov 14, 2025 Q3 2025 |
13,156,929
shares
|
$941 Million
0.53% of portfolio
|
Q3 2025
Reduced 18.02%
|
|
|
Capital World Investors
Los Angeles, CA |
Nov 13, 2025 Q3 2025 |
12,722,728
shares
|
$910 Million
0.12% of portfolio
|
Q3 2025
Added 1.46%
|
|
|
Black Rock Inc.
New York, NY |
Aug 13, 2024 Q2 2024 |
10,321,030
shares
|
$738 Million
0.01% of portfolio
|
Q2 2024
Added 5.62%
|
|
|
Wellington Management Group LLP
Boston, MA |
Nov 14, 2025 Q3 2025 |
6,588,811
shares
|
$471 Million
0.08% of portfolio
|
Q3 2025
Added 3.83%
|
|
|
Lombard Odier Asset Management (Europe) LTD
London, X0 |
Nov 14, 2025 Q3 2025 |
6,494,000
shares
|
$465 Million
0.44% of portfolio
|
Q3 2025
New holding
|
|
|
Bellevue Group Ag
Kuesnacht, V8 |
Nov 14, 2025 Q3 2025 |
6,244,451
shares
|
$447 Million
8.74% of portfolio
|
Q3 2025
Reduced 20.49%
|
|
|
State Street Corp
Boston, MA |
Nov 14, 2025 Q3 2025 |
4,388,651
shares
|
$314 Million
0.01% of portfolio
|
Q3 2025
Reduced 3.13%
|
|
|
Deep Track Capital, LP
Greenwich, CT |
Nov 14, 2025 Q3 2025 |
3,808,144
shares
|
$272 Million
7.86% of portfolio
|
Q3 2025
Reduced 22.15%
|
|
|
Pictet Asset Management Sa
Geneva 73, V8 |
Aug 10, 2023 Q2 2023 |
3,095,670
shares
|
$221 Million
0.15% of portfolio
|
Q2 2023
Added 178.13%
|
|
|
Geode Capital Management, LLC
Boston, MA |
Nov 12, 2025 Q3 2025 |
3,066,289
shares
|
$219 Million
0.01% of portfolio
|
Q3 2025
Added 6.06%
|
|
|
Tweedy Browne Co.
Tweedy, Browne CO LLC | Stamford, Ct
|
Nov 20, 2025 Q3 2025 |
2,901,216
shares
|
$208 Million
17.06% of portfolio
|
Q3 2025
Added 0.32%
|
|
|
Price T Rowe Associates Inc
Baltimore, MD |
Nov 14, 2025 Q3 2025 |
2,729,685
shares
|
$195 Million
0.02% of portfolio
|
Q3 2025
Reduced 12.68%
|
|
|
Ken Griffin
Citadel Advisors LLC | Chicago, Il
|
Nov 14, 2025 Q3 2025 |
2,402,065
shares
|
$172 Million
0.03% of portfolio
|
Q3 2025
Added 60.68%
|
|
|
David A. Siegel
Two Sigma Advisers, LP | New York, Ny
|
Nov 14, 2025 Q3 2025 |
2,073,111
shares
|
$148 Million
0.29% of portfolio
|
Q3 2025
Reduced 22.29%
|
|
|
Deerfield Management Company, L.P. (Series C)
New York, NY |
Nov 14, 2025 Q3 2025 |
1,979,669
shares
|
$142 Million
2.41% of portfolio
|
Q3 2025
New holding
|
|
|
Two Sigma Investments, LP
New York, NY |
Nov 14, 2025 Q3 2025 |
1,575,943
shares
|
$113 Million
0.17% of portfolio
|
Q3 2025
Reduced 11.88%
|
|
|
Charles Schwab Investment Management Inc
San Francisco, CA |
Nov 10, 2025 Q3 2025 |
1,519,951
shares
|
$109 Million
0.02% of portfolio
|
Q3 2025
Added 2.16%
|
|
|
Pictet Asset Management Holding Sa
Carouge, V8 |
Nov 18, 2025 Q3 2025 |
1,393,124
shares
|
$99.7 Million
0.09% of portfolio
|
Q3 2025
Added 128.89%
|
|
|
American Century Companies Inc
Kansas City, MO |
Nov 12, 2025 Q3 2025 |
1,372,225
shares
|
$98.2 Million
0.05% of portfolio
|
Q3 2025
Added 190.27%
|
|
|
Adage Capital Partners Gp, L.L.C.
Boston, MA |
Nov 14, 2025 Q3 2025 |
1,315,000
shares
|
$94.1 Million
0.14% of portfolio
|
Q3 2025
Reduced 65.39%
|
|
|
Royal Bank Of Canada
Toronto, A6 |
Nov 14, 2025 Q3 2025 |
1,226,624
shares
|
$87.8 Million
0.01% of portfolio
|
Q2 2025
Added 29.84%
|
|
|
Morgan Stanley
New York, NY |
Nov 14, 2025 Q3 2025 |
1,180,316
shares
|
$84.5 Million
0.0% of portfolio
|
Q3 2025
Reduced 13.35%
|
|
|
Ubs Asset Management Americas Inc
Chicago, IL |
Nov 14, 2025 Q3 2025 |
1,154,166
shares
|
$82.6 Million
0.02% of portfolio
|
Q3 2025
Added 45.9%
|
|
|
Macquarie Group LTD
Australia, C3 |
Nov 13, 2025 Q3 2025 |
1,131,936
shares
|
$81 Million
0.09% of portfolio
|
Q3 2025
Reduced 21.07%
|
|