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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 Officer2026-03-0510,250$33.86
$347.01kSell
Jennifer FitzpatrickChief Legal Officer2026-03-0510,250$6.11
$62.63kBuy
Orbimed Advisors LLCDirector2026-02-0329,063$44.58
$1.30MSell
Peter A. ThompsonDirector2026-02-0329,063$44.58
$1.30MSell
Peter A. ThompsonDirector2026-02-021,890$44.57
$84.24kSell
Orbimed Advisors LLCDirector2026-02-021,890$44.57
$84.24kSell
Tpg GP A LLC10% Owner2026-01-22250,000$40.00
$10.00MSell
Peter A. ThompsonDirector2025-12-2433,356$44.55
$1.49MSell
Orbimed Advisors LLCDirector2025-12-2433,356$44.55
$1.49MSell
Peter A. ThompsonDirector2025-12-19875$44.49
$38.93kSell

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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 LP22.01%9,905,045$380.16MInstitution
Peter A. Thompson16.08%7,235,661$277.70MInsider
Tpg GP A LLC14.99%6,744,962$258.87MInstitution
Tpg GP A LLC14.43%6,494,962$249.28MInsider
Atlas Venture Fund XI LP8.21%3,694,020$141.78MInsider
Orbimed Advisors LLC7.92%3,561,655$136.70MInstitution
Orbimed Advisors LLC7.85%3,530,702$135.51MInsider
Viking Global Investors LP7.10%3,195,181$122.63MInstitution
Atlas Venture Life Science Advisors LLC6.66%2,995,602$114.97MInstitution
Bruce Booth6.66%2,995,602$114.97MInsider

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SION vs Biotech Stocks

TickerInst. %Insider %Net Insider (L12M)Net Insider (L3M)
SION64.00%36.00%Net SellingNet Selling
VCEL91.18%8.82%Net SellingNet Selling
INVA60.21%39.79%Net BuyingNet Selling
IOVA19.44%80.56%Net SellingNet Selling
NVAX72.31%17.25%Net SellingNet Selling
View Top Biotech Stocks

Sionna Therapeutics Stock Ownership FAQ

Who owns Sionna Therapeutics?

Sionna Therapeutics (NASDAQ: SION) is owned by 97.67% institutional shareholders, 54.95% Sionna Therapeutics insiders, and 0.00% retail investors. Peter A. Thompson is the largest individual Sionna Therapeutics shareholder, owning 7.24M shares representing 16.08% of the company. Peter A. Thompson's Sionna Therapeutics shares are currently valued at $265.40M.

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