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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. ThompsonDirector2026-05-27101$44.49
$4.49kSell
Orbimed Advisors LLCDirector2026-05-27101$44.49
$4.49kSell
Orbimed Advisors LLCDirector2026-05-11184,639$46.22
$8.53MSell
Peter A. ThompsonDirector2026-05-11184,639$46.22
$8.53MSell
Peter A. ThompsonDirector2026-05-0859,767$44.58
$2.66MSell
Orbimed Advisors LLCDirector2026-05-0859,767$44.58
$2.66MSell
Peter A. ThompsonDirector2026-05-0748,546$44.61
$2.17MSell
Orbimed Advisors LLCDirector2026-05-0748,546$44.61
$2.17MSell
Peter A. ThompsonDirector2026-04-182,948$44.52
$131.24kSell
Orbimed Advisors LLCDirector2026-04-182,948$44.52
$131.24kSell

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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$363.81MInstitution
Tpg GP A LLC14.39%6,494,962$238.56MInstitution
Tpg GP A LLC14.39%6,494,962$238.56MInsider
Peter A. Thompson14.12%6,376,680$234.22MInsider
Atlas Venture Fund XI LP8.18%3,694,020$135.68MInsider
Orbimed Advisors LLC7.82%3,530,702$129.68MInstitution
Viking Global Investors LP7.08%3,195,181$117.36MInstitution
Bruce Booth6.63%2,995,602$110.03MInsider
Atlas Venture Life Science Advisors LLC6.63%2,995,602$110.03MInstitution
Orbimed Advisors LLC5.92%2,671,721$98.13MInsider

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SION vs Biotech Stocks

TickerInst. %Insider %Net Insider (L12M)Net Insider (L3M)
SION66.37%33.63%Net SellingNet Selling
TYRA65.84%34.16%Net SellingNet Selling
SNDX91.45%8.55%Net SellingNet Selling
ABCL40.70%44.12%Net BuyingNet Buying
ZYME51.34%48.66%Net Buying
View Top Biotech Stocks

Sionna Therapeutics Stock Ownership FAQ

Who owns Sionna Therapeutics?

Sionna Therapeutics (NASDAQ: SION) is owned by 100.57% institutional shareholders, 50.95% 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 $242.26M.

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