Ionis Pharmaceuticals Inc IONS
We take great care to ensure that the data presented and summarized in this overview for IONIS PHARMACEUTICALS INC is accurate and up-to-date, based on a comprehensive analysis of 13F filing forms for institutional ownership and form 4 filings for insider transactions. Please note that this data may differ from other sources and should not be relied upon as the sole basis for investment decisions.
Top Institutions Holding IONS
View all-
Vanguard Group Inc Valley Forge, PA16.5MShares$1.18 Billion0.02% of portfolio
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T. Rowe Price Investment Management, Inc. Baltimore, MD13.2MShares$941 Million0.53% of portfolio
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Capital World Investors Los Angeles, CA12.7MShares$910 Million0.12% of portfolio
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Black Rock Inc. New York, NY10.3MShares$738 Million0.01% of portfolio
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Wellington Management Group LLP Boston, MA6.59MShares$471 Million0.08% of portfolio
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Lombard Odier Asset Management (Europe) LTD London, X06.49MShares$465 Million0.44% of portfolio
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Bellevue Group Ag Kuesnacht, V86.24MShares$447 Million8.74% of portfolio
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State Street Corp Boston, MA4.39MShares$314 Million0.01% of portfolio
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Deep Track Capital, LP Greenwich, CT3.81MShares$272 Million7.86% of portfolio
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Pictet Asset Management Sa Geneva 73, V83.1MShares$221 Million0.15% of portfolio
Latest Institutional Activity in IONS
Top Purchases
Top Sells
About IONS
Ionis Pharmaceuticals, Inc. discovers and develops RNA-targeted therapeutics in the United States. The company offers SPINRAZA for spinal muscular atrophy (SMA) in pediatric and adult patients; TEGSEDI, an injection for the treatment of polyneuropathy of hereditary transthyretin-mediated amyloidosis in adults; and WAYLIVRA, a treatment for familial chylomicronemia syndrome and familial partial lipodystrophy. It also develops medicines for various indications that are in phase 3 study, including Eplontersen as a monthly self-administered subcutaneous injection to treat all types of TTR amyloidosis; Olezarsen for patients with severe hypertriglyceridemia (SHTG); Donidalorsen for patients with hereditary angioedema; ION363 for patients with amyotrophic lateral sclerosis; Pelacarsen for patients with established cardiovascular disease and elevated lipoprotein(a); and Tofersen to inhibit the production of superoxide dismutase 1. In addition, the company develops medicines for metabolic diseases, infectious diseases, renal diseases, ophthalmic diseases, and cancer. It has a strategic collaboration with Biogen Inc.; and collaboration and license agreement with AstraZeneca, Bayer AG, GlaxoSmithKline plc, Novartis AG, Roche, Janssen Biotech, Inc., and Flamingo Therapeutics, Inc. Ionis Pharmaceuticals, Inc. was founded in 1989 and is based in Carlsbad, California.
Insider Transactions at IONS
Insider Transaction List
View all| Date | Insider | Transaction | Ownership Type | Shares Traded | Value / Price |
|---|---|---|---|---|---|
|
Dec 01
2025
|
Joseph H Wender Director |
SELL
Open market or private sale
|
Indirect |
28,000
-24.61%
|
$2,240,000
$80.95 P/Share
|
|
Nov 25
2025
|
Shannon L. Devers EVP, Chief Human Resources Ofc |
SELL
Open market or private sale
|
Direct |
16,777
-48.95%
|
$1,342,160
$80.91 P/Share
|
|
Nov 25
2025
|
Shannon L. Devers EVP, Chief Human Resources Ofc |
BUY
Exercise of conversion of derivative security
|
Direct |
16,777
+32.87%
|
$889,181
$53.77 P/Share
|
|
Nov 25
2025
|
Joseph Klein Iii Director |
SELL
Open market or private sale
|
Indirect |
12,000
-100.0%
|
$960,000
$80.0 P/Share
|
|
Nov 25
2025
|
Joseph Klein Iii Director |
BUY
Exercise of conversion of derivative security
|
Indirect |
12,000
+50.0%
|
-
|
|
Nov 19
2025
|
Joan E Herman Director |
SELL
Open market or private sale
|
Direct |
44,000
-30.82%
|
$3,168,000
$72.13 P/Share
|
|
Nov 19
2025
|
Joan E Herman Director |
BUY
Exercise of conversion of derivative security
|
Direct |
44,000
+23.1%
|
$2,244,000
$51.98 P/Share
|
|
Nov 18
2025
|
Joseph H Wender Director |
BUY
Exercise of conversion of derivative security
|
Direct |
16,000
+50.0%
|
$384,000
$24.42 P/Share
|
|
Nov 06
2025
|
Richard S Geary EVP, Chief Development Officer |
SELL
Open market or private sale
|
Direct |
33,038
-21.64%
|
$2,477,850
$75.76 P/Share
|
|
Nov 06
2025
|
Richard S Geary EVP, Chief Development Officer |
BUY
Exercise of conversion of derivative security
|
Direct |
33,038
+17.77%
|
$1,916,204
$58.83 P/Share
|
|
Nov 06
2025
|
Brian Birchler EVP, Corp and Development Ops |
SELL
Open market or private sale
|
Direct |
8,000
-14.08%
|
$608,000
$76.17 P/Share
|
|
Nov 05
2025
|
Richard S Geary EVP, Chief Development Officer |
SELL
Open market or private sale
|
Direct |
1,601
-1.32%
|
$120,075
$75.01 P/Share
|
|
Nov 05
2025
|
Richard S Geary EVP, Chief Development Officer |
BUY
Exercise of conversion of derivative security
|
Direct |
1,601
+1.31%
|
$92,858
$58.83 P/Share
|
|
Nov 03
2025
|
Richard S Geary EVP, Chief Development Officer |
SELL
Open market or private sale
|
Direct |
1,680
-1.39%
|
$126,000
$75.05 P/Share
|
|
Nov 03
2025
|
Richard S Geary EVP, Chief Development Officer |
BUY
Exercise of conversion of derivative security
|
Direct |
1,680
+1.37%
|
$97,440
$58.83 P/Share
|
|
Oct 31
2025
|
Joseph Loscalzo Director |
SELL
Open market or private sale
|
Direct |
16,000
-30.58%
|
$1,200,000
$75.1 P/Share
|
|
Oct 31
2025
|
Joseph Loscalzo Director |
BUY
Exercise of conversion of derivative security
|
Direct |
16,000
+23.42%
|
$832,000
$52.22 P/Share
|
|
Oct 31
2025
|
Joseph H Wender Director |
SELL
Open market or private sale
|
Indirect |
11,200
-14.89%
|
$840,000
$75.16 P/Share
|
|
Oct 31
2025
|
Richard S Geary EVP, Chief Development Officer |
SELL
Open market or private sale
|
Direct |
89,249
-28.57%
|
$6,693,675
$75.11 P/Share
|
|
Oct 31
2025
|
Richard S Geary EVP, Chief Development Officer |
BUY
Exercise of conversion of derivative security
|
Direct |
69,249
+23.25%
|
$4,016,442
$58.83 P/Share
|
Last 12 Months Summary
| Exercise of conversion of derivative security | 1.3M shares |
|---|---|
| Open market or private purchase | 20K shares |
| Grant, award, or other acquisition | 48.5K shares |
| Other acquisition or disposition | 3.62K shares |
| Open market or private sale | 1.4M shares |
|---|---|
| Exercise of conversion of derivative security | 12.9K shares |