Institutional shares held 132 Million
829K calls
789K puts
Total value of holdings $4.05B
$25.5M calls
$24.2M puts
Market Cap $4.36B
141,940,992 Shares Out.
Institutional ownership 92.97%
# of Institutions 400


Latest Institutional Activity in IONS

Top Purchases

Q1 2025
Teacher Retirement System Of Texas Shares Held: 500K ($15.4M)
Q1 2025
Sovran Advisors, LLC Shares Held: 329K ($10.1M)
Q1 2025
Sonora Investment Management Group, LLC Shares Held: 154K ($4.73M)
Q1 2025
Bleakley Financial Group, LLC Shares Held: 22.3K ($684K)
Q1 2025
Moisand Fitzgerald Tamayo, LLC Shares Held: 5K ($154K)

Top Sells

Q1 2025
Envestnet Asset Management Inc Shares Held: 15K ($462K)
Q1 2025
Gamma Investing LLC Shares Held: 961 ($29.5K)
Q1 2025
Sumitomo Mitsui Trust Holdings, Inc. Shares Held: 142K ($4.37M)
Q1 2025
Davenport & CO LLC Shares Held: 56.4K ($1.73M)
Q1 2025
New York State Common Retirement Fund Shares Held: 78.3K ($2.4M)

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

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Date Insider Transaction Ownership Type Shares Traded Value / Price
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Last 12 Months Summary

Buy / Acquisition
399K Shares
From 33 Insiders
Exercise of conversion of derivative security 327K shares
Open market or private purchase 20K shares
Grant, award, or other acquisition 48.5K shares
Other acquisition or disposition 3.15K shares
Sell / Disposition
221K Shares
From 15 Insiders
Open market or private sale 221K shares

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P - Open market or private purchase×
S - Open market or private sale×
V - Transaction voluntarily reported earlier than required×
A - Grant, award, or other acquisition×
D - Sale (or disposition) back to the issuer×
F - Payment of exercise price or tax liability×
I - Discretionary transaction×
M - Exercise of conversion of derivative security×
C - Conversion of derivative security×
E - Expiration of short derivative position×
H - Expiration (or cancellation) of long derivative position with value received×
O - Exercise of out-of-the-money derivative securities×
X - Exercise of in-the-money or at-the-money derivatives securities×
G - Bona fide gift×
L - Small Acquisition×
W - Acquisition or disposition by will or laws×
Z - Deposit into or withdrawal from voting trust×
J - Other acquisition or disposition×
K - Transaction in equity swap or similar instrument×
U - Disposition due to a tender of shares in a change of control transaction×
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