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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
Peter A. ThompsonDirector2026-07-0785,918$44.86
$3.85MSell
Orbimed Advisors LLCDirector2026-07-0785,918$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
Peter A. ThompsonDirector2026-06-30115,844$45.50
$5.27MSell
Orbimed Advisors LLCDirector2026-06-30115,844$45.50
$5.27MSell
Orbimed Advisors LLCDirector2026-05-27101$44.49
$4.49kSell
Peter A. ThompsonDirector2026-05-27101$44.49
$4.49kSell
Peter A. ThompsonDirector2026-05-11184,639$46.22
$8.53MSell
Orbimed Advisors LLCDirector2026-05-11184,639$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
Tpg GP A LLC14.37%6,494,962$38.71MInsider
Peter A. Thompson13.66%6,174,918$36.80MInsider
Atlas Venture Fund XI LP8.17%3,694,020$22.02MInsider
Bruce Booth6.63%2,995,602$17.85MInsider
Orbimed Advisors LLC5.46%2,469,959$14.72MInsider
Michael Cloonan1.69%765,393$4.56MInsider
Ra Capital Management LP0.35%159,033$947.84kInsider
Elena Ridloff0.29%133,069$793.09kInsider
Charlotte McKee0.28%128,415$765.35kInsider
Jennifer Fitzpatrick0.12%56,265$335.34kInsider

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SION vs Biotech Stocks

TickerInst. %Insider %Net Insider (L12M)Net Insider (L3M)
SION0.11%51.03%Net SellingNet Selling
CUE0.02%91.97%Net BuyingNet Selling
LYEL0.01%99.99%Net BuyingNet Selling
ACIU0.02%4.41%Net Selling
CAMP0.07%49.92%Net SellingNet Selling
View Top Biotech Stocks

Sionna Therapeutics Stock Ownership FAQ

Who owns Sionna Therapeutics?

Sionna Therapeutics (NASDAQ: SION) is owned by 0.11% institutional shareholders, 51.03% Sionna Therapeutics insiders, and 48.86% retail investors. Tpg GP A LLC is the largest individual Sionna Therapeutics shareholder, owning 6.49M shares representing 14.37% of the company. Tpg GP A LLC's Sionna Therapeutics shares are currently valued at $38.71M.

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