WallStreetZenWallStreetZen

NASDAQ: IONS
Ionis Pharmaceuticals Inc Stock Ownership - Who owns Ionis Pharmaceuticals?

OverviewForecastEarningsRevenueDividendOwnership

Insider buying vs selling

Have Ionis Pharmaceuticals Inc insiders been buying or selling?

Buy
Sell
NameRoleDateSharesPriceValue
Brett P. MoniaChief Executive Officer2026-05-143,220$78.68
$253.35kSell
Brett P. MoniaChief Executive Officer2026-05-143,220$32.60
$104.97kBuy
Brett P. MoniaChief Executive Officer2026-05-131,316$32.60
$42.90kBuy
Brett P. MoniaChief Executive Officer2026-05-131,316$78.01
$102.67kSell
Joseph LoscalzoDirector2026-05-0417,781$75.58
$1.34MSell
Joseph LoscalzoDirector2026-05-0412,000$60.20
$722.40kBuy
Joseph LoscalzoDirector2026-05-0459,508$74.90
$4.46MSell
Joseph LoscalzoDirector2026-05-0416,000$42.88
$686.08kBuy
Joseph LoscalzoDirector2026-05-0410,321$41.08
$423.99kBuy
Joseph LoscalzoDirector2026-05-0412,000$40.05
$480.60kBuy

1 of 29

IONS insiders have sold more... subscribe to Premium to read more.
Net Insider Buy/Sell (L12M) Ownership

Be the first to know when IONS insiders and whales buy or sell their stock.

IONS Shareholders

What type of owners hold Ionis Pharmaceuticals Inc stock?

Institutional
Insider
Retail
NameHoldSharesValueType
Vanguard Portfolio Management LLC4.73%7,808,902$589.18MInstitution
Vanguard Capital Management LLC4.31%7,118,330$537.08MInstitution
Lilly Co Eli1.51%2,500,000$188.63MInsider
Tweedy Browne Co LLC 11.38%2,275,625$171.70MInstitution
Pictet Asset Management Holding Sa0.87%1,434,995$108.27MInstitution
Stanley T. Crooke0.80%1,324,914$99.96MInsider
Invesco Ltd0.77%1,277,358$96.38MInstitution
Vanguard Fiduciary Trust Co0.62%1,024,377$77.29MInstitution
Connor Clark Lunn Investment Management Ltd0.53%874,089$65.95MInstitution
Ubs Group Ag0.49%808,443$61.00MInstitution

1 of 3

IONS vs Biotech Stocks

TickerInst. %Insider %Net Insider (L12M)Net Insider (L3M)
IONS21.56%3.33%Net SellingNet Selling
EXEL35.77%5.71%Net SellingNet Selling
MDGL6.44%93.56%Net BuyingNet Selling
BBIO24.73%54.27%Net SellingNet Selling
SMMT1.87%98.13%Net Buying
View Top Biotech Stocks

Ionis Pharmaceuticals Stock Ownership FAQ

Who owns Ionis Pharmaceuticals?

Ionis Pharmaceuticals (NASDAQ: IONS) is owned by 21.56% institutional shareholders, 3.33% Ionis Pharmaceuticals insiders, and 75.10% retail investors. Lilly Co Eli is the largest individual Ionis Pharmaceuticals shareholder, owning 2.50M shares representing 1.51% of the company. Lilly Co Eli's Ionis Pharmaceuticals shares are currently valued at $188.63M.

If you're new to stock investing, here's how to buy Ionis Pharmaceuticals stock.
©2026 WallStreetZen
Company
AboutNewsBlogStock Investing FAQPlansPrivacy PolicyTerms of ServiceCancellation & RefundsPerformanceHelp GuidesContactTwitterYouTubeNewsletter
Stock Tools
Top Performing AnalystsStock ScreenerStock ForecastTrending StocksStrong Buy StocksHighest Earnings StocksBest Dividend Paying StocksStatisticsStock Market SectorsStock Market IndustriesHow to Buy Stocks Online
Stock Ideas
Buy The DipBiggest Stock Gainers TodayBiggest Stock Losers Today52 Week High Stocks52 Week Low StocksMost Active Stocks TodayMost Undervalued StocksBest Penny Stocks to Buy NowBest Stocks Under $5Best Stocks Under $10
WallStreetZen does not provide financial advice and does not issue recommendations or offers to buy stock or sell any security.

Information is provided 'as-is' and solely for informational purposes and is not advice. WallStreetZen does not bear any responsibility for any losses or damage that may occur as a result of reliance on this data.