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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 Officer2025-09-0410,250$6.11
$62.63kBuy
Jennifer FitzpatrickChief Legal Officer2025-09-0410,250$23.12
$236.98kSell
Elena RidloffCFO Head of Corp. Dev.2025-09-028,836$25.08
$221.61kSell
Elena RidloffCFO Head of Corp. Dev.2025-08-29748$25.18
$18.83kSell
Elena RidloffCFO Head of Corp. Dev.2025-08-2816,098$25.97
$418.07kSell
Elena RidloffCFO Head of Corp. Dev.2025-08-273,618$25.10
$90.81kSell
Michael CloonanPresident CEO2025-08-277,426$6.11
$45.37kBuy
Michael CloonanPresident CEO2025-08-277,426$25.01
$185.72kSell
Elena RidloffCFO Head of Corp. Dev.2025-08-263,700$25.13
$92.98kSell
Michael CloonanPresident CEO2025-08-2617,574$24.96
$438.65kSell

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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 LP23.66%10,445,322$238.47MInstitution
Tpg GP A LLC15.28%6,744,962$153.99MInstitution
Tpg GP A LLC15.28%6,744,962$153.99MInsider
Orbimed Advisors LLC8.39%3,704,959$84.58MInstitution
Orbimed Advisors LLC8.39%3,704,959$84.58MInsider
Peter A. Thompson8.39%3,704,959$84.58MInsider
Bruce Booth8.37%3,694,020$84.33MInsider
Atlas Venture Fund XI LP8.37%3,694,020$84.33MInsider
Atlas Venture Life Science Advisors LLC8.37%3,694,020$84.33MInstitution
Viking Global Investors LP7.24%3,195,181$72.95MInstitution

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SION vs Biotech Stocks

TickerInst. %Insider %Net Insider (L12M)Net Insider (L3M)
SION63.96%36.04%Net BuyingNet Selling
TRVI38.52%61.48%Net Buying
PHAR0.01%0.00%
MAZE82.96%17.04%
ATAI13.61%38.27%Net BuyingNet Buying
View Top Biotech Stocks

Sionna Therapeutics Stock Ownership FAQ

Who owns Sionna Therapeutics?

Sionna Therapeutics (NASDAQ: SION) is owned by 98.43% institutional shareholders, 55.46% Sionna Therapeutics insiders, and 0.00% retail investors. Tpg GP A LLC is the largest individual Sionna Therapeutics shareholder, owning 6.74M shares representing 15.28% of the company. Tpg GP A LLC's Sionna Therapeutics shares are currently valued at $153.99M.

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