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NASDAQ: SION
Sionna Therapeutics Inc Stock Ownership - Who owns Sionna Therapeutics?

OverviewForecastEarningsRevenueDividendOwnership

Insider buying vs selling

Have Sionna Therapeutics Inc insiders been buying or selling?

Buy
Sell
NameRoleDateSharesPriceValue
Orbimed Advisors LLCDirector2026-07-0785,918$44.86
$3.85MSell
Peter A. ThompsonDirector2026-07-0785,918$44.86
$3.85MSell
Jennifer FitzpatrickChief Legal Officer2026-07-0610,250$6.11
$62.63kBuy
Jennifer FitzpatrickChief Legal Officer2026-07-0610,250$43.60
$446.86kSell
Orbimed Advisors LLCDirector2026-06-30115,844$45.50
$5.27MSell
Peter A. ThompsonDirector2026-06-30115,844$45.50
$5.27MSell
Orbimed Advisors LLCDirector2026-05-27101$44.49
$4.49kSell
Peter A. ThompsonDirector2026-05-27101$44.49
$4.49kSell
Orbimed Advisors LLCDirector2026-05-11184,639$46.22
$8.53MSell
Peter A. ThompsonDirector2026-05-11184,639$46.22
$8.53MSell

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Net Insider Buy/Sell (L12M) Ownership

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SION Shareholders

What type of owners hold Sionna Therapeutics Inc stock?

Institutional
Insider
Retail
NameHoldSharesValueType
Ra Capital Management LP21.94%9,905,045$494.66MInstitution
Tpg GP A LLC14.39%6,494,962$324.36MInsider
Tpg GP A LLC14.39%6,494,962$324.36MInstitution
Peter A. Thompson13.68%6,174,918$308.38MInsider
Atlas Venture Fund XI LP8.18%3,694,020$184.48MInsider
Orbimed Advisors LLC7.82%3,530,702$176.32MInstitution
Viking Global Investors LP7.08%3,195,181$159.57MInstitution
Atlas Venture Life Science Advisors LLC6.63%2,995,602$149.60MInstitution
Bruce Booth6.63%2,995,602$149.60MInsider
Enavate Sciences GP LLC5.49%2,478,030$123.75MInstitution

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SION vs Biotech Stocks

TickerInst. %Insider %Net Insider (L12M)Net Insider (L3M)
SION66.77%33.23%Net SellingNet Selling
ADMA79.02%20.98%Net SellingNet Buying
VRDN75.63%24.37%Net BuyingNet Buying
VERA69.11%30.89%Net SellingNet Selling
PHVS90.09%5.29%Net SellingNet Selling
View Top Biotech Stocks

Sionna Therapeutics Stock Ownership FAQ

Who owns Sionna Therapeutics?

Sionna Therapeutics (NASDAQ: SION) is owned by 100.57% institutional shareholders, 50.06% Sionna Therapeutics insiders, and 0.00% retail investors. Tpg GP A LLC is the largest individual Sionna Therapeutics shareholder, owning 6.49M shares representing 14.39% of the company. Tpg GP A LLC's Sionna Therapeutics shares are currently valued at $307.47M.

If you're new to stock investing, here's how to buy Sionna Therapeutics stock.
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