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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
Jennifer FitzpatrickChief Legal Officer2025-12-0510,250$6.11
$62.63kBuy
Jennifer FitzpatrickChief Legal Officer2025-12-0510,250$40.52
$415.33kSell
Peter A. ThompsonDirector2025-11-261,600$44.49
$71.18kSell
Orbimed Advisors LLCDirector2025-11-261,600$44.49
$71.18kSell
Peter A. ThompsonDirector2025-11-2511,890$44.60
$530.29kSell
Orbimed Advisors LLCDirector2025-11-2511,890$44.60
$530.29kSell
Orbimed Advisors LLCDirector2025-11-2494,583$44.54
$4.21MSell
Peter A. ThompsonDirector2025-11-2494,583$44.54
$4.21MSell
Ra Capital Management LPDirector2025-11-217,609$39.50
$300.56kSell
Ra Capital Management LPDirector2025-11-211,210$39.50
$47.80kSell

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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 LP23.40%10,445,322$446.75MInstitution
Peter A. Thompson16.36%7,301,845$312.30MInsider
Tpg GP A LLC15.11%6,744,962$288.48MInsider
Tpg GP A LLC15.11%6,744,962$288.48MInstitution
Orbimed Advisors LLC8.30%3,704,959$158.46MInstitution
Atlas Venture Fund XI LP8.28%3,694,020$157.99MInsider
Atlas Venture Life Science Advisors LLC8.10%3,615,527$154.64MInstitution
Orbimed Advisors LLC8.06%3,596,886$153.84MInsider
Viking Global Investors LP7.16%3,195,181$136.66MInstitution
Bruce Booth6.71%2,995,602$128.12MInsider

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SION vs Biotech Stocks

TickerInst. %Insider %Net Insider (L12M)Net Insider (L3M)
SION63.05%36.95%Net BuyingNet Selling
ZYME52.65%47.35%Net Buying
MAZE87.16%12.84%Net Selling
IMCR95.81%4.19%Net BuyingNet Buying
ZLAB3.18%1.76%Net BuyingNet Selling
View Top Biotech Stocks

Sionna Therapeutics Stock Ownership FAQ

Who owns Sionna Therapeutics?

Sionna Therapeutics (NASDAQ: SION) is owned by 95.99% institutional shareholders, 56.26% Sionna Therapeutics insiders, and 0.00% retail investors. Peter A. Thompson is the largest individual Sionna Therapeutics shareholder, owning 7.30M shares representing 16.36% of the company. Peter A. Thompson's Sionna Therapeutics shares are currently valued at $312.30M.

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