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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. ThompsonDirector2026-04-182,948$44.52
$131.24kSell
Orbimed Advisors LLCDirector2026-04-182,948$44.52
$131.24kSell
Orbimed Advisors LLCDirector2026-04-1752,397$44.68
$2.34MSell
Peter A. ThompsonDirector2026-04-1752,397$44.68
$2.34MSell
Peter A. ThompsonDirector2026-04-16226,906$45.34
$10.29MSell
Orbimed Advisors LLCDirector2026-04-16226,906$45.34
$10.29MSell
Peter A. ThompsonDirector2026-04-15235,863$44.64
$10.53MSell
Orbimed Advisors LLCDirector2026-04-15235,863$44.64
$10.53MSell
Peter A. ThompsonDirector2026-04-1447,814$44.51
$2.13MSell
Orbimed Advisors LLCDirector2026-04-1447,814$44.51
$2.13MSell

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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$387.78MInstitution
Tpg GP A LLC14.99%6,744,962$264.07MInstitution
Peter A. Thompson14.82%6,669,733$261.12MInsider
Tpg GP A LLC14.43%6,494,962$254.28MInsider
Atlas Venture Fund XI LP8.21%3,694,020$144.62MInsider
Orbimed Advisors LLC7.92%3,561,655$139.44MInstitution
Viking Global Investors LP7.10%3,195,181$125.09MInstitution
Atlas Venture Life Science Advisors LLC6.66%2,995,602$117.28MInstitution
Bruce Booth6.66%2,995,602$117.28MInsider
Orbimed Advisors LLC6.59%2,964,774$116.07MInsider

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SION vs Biotech Stocks

TickerInst. %Insider %Net Insider (L12M)Net Insider (L3M)
SION65.07%34.93%Net SellingNet Selling
AMLX66.79%33.21%Net SellingNet Selling
CAPR41.32%58.68%Net BuyingNet Buying
TRVI43.05%56.95%Net Buying
NRIX93.03%6.97%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, 52.43% Sionna Therapeutics insiders, and 0.00% retail investors. Peter A. Thompson is the largest individual Sionna Therapeutics shareholder, owning 6.67M shares representing 14.82% of the company. Peter A. Thompson's Sionna Therapeutics shares are currently valued at $261.12M.

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