Sionna Therapeutics (SION) Insider Trading & Ownership $32.85 +1.94 (+6.28%) As of 12:40 PM Eastern Add Compare Share Share Insider Trades Stock AnalysisAnalyst ForecastsChartCompetitorsEarningsFDA EventsHeadlinesInsider TradesOwnershipSEC FilingsShort InterestTrendsBuy This Stock Sionna Therapeutics (NASDAQ:SION) Insider Buying and Selling ActivityCurrentInsider OwnershipPercentage3.90%Number OfInsiders Buying(Last 12 Months)1Amount OfInsider Buying(Last 12 Months)$950.40KNumber OfInsiders Selling(Last 12 Months)3Amount OfInsider Selling(Last 12 Months)$11.99M Get SION Insider Trade Alerts Want to know when executives and insiders are buying or selling Sionna Therapeutics stock? Sign up for InsiderTrades.com's daily newsletter to get the latest insider transactions delivered to your inbox daily. 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SION Insider Buying and Selling by Quarter Sionna Therapeutics Insider and Congressional Trades History Insiders and Members of Congress Insiders Only Members of Congress Only Transaction Type Custom Range 1 Month 3 Months 6 Months Year-to-Date 1 Year 2 Years 3 Years Time Frame Start Date End Date Export to Excel Transaction DateNameTitleBuy/SellNumber of SharesAverage Share PriceTotal TransactionDetails10/15/2025Bruce BoothDirectorSell115,856$30.61$3,546,352.16 10/14/2025Bruce BoothDirectorSell606$29.95$18,149.70 10/13/2025Bruce BoothDirectorSell58,232$30.38$1,769,088.16 10/10/2025Bruce BoothDirectorSell20,238$29.98$606,735.24 10/6/2025Bruce BoothDirectorSell11,800$29.95$353,410.00 10/3/2025Bruce BoothDirectorSell37,746$30.00$1,132,380.00 10/1/2025Bruce BoothDirectorSell200$29.95$5,990.00 9/30/2025Bruce BoothDirectorSell12,388$30.06$372,383.28 9/29/2025Bruce BoothDirectorSell66,105$30.09$1,989,099.45 9/29/2025Michael CloonanCEOSell7,793$29.70$231,452.10 Get Insider Trades Delivered To Your InboxEnter your email address below to receive a concise daily summary of insider buying activity, insider selling activity and changes in hedge fund holdings. 9/26/2025Michael CloonanCEOSell17,207$28.85$496,421.95 9/2/2025Elena RidloffCFOSell8,836$25.08$221,606.88 8/29/2025Elena RidloffCFOSell748$25.18$18,834.64 8/28/2025Elena RidloffCFOSell16,098$25.97$418,065.06 8/27/2025Elena RidloffCFOSell3,618$25.10$90,811.80 8/27/2025Michael CloonanCEOSell7,426$25.01$185,724.26 8/26/2025Elena RidloffCFOSell3,700$25.13$92,981.00 8/26/2025Michael CloonanCEOSell17,574$24.96$438,647.04 6/27/2025Tpg Gp A, LlcMajor ShareholderBuy60,000$15.84$950,400.00 (Data available from 1/1/2013 forward) SION Insider Trading Activity - Frequently Asked Questions Who is on Sionna Therapeutics' Insider Roster? The list of insiders at Sionna Therapeutics includes Bruce Booth, Elena Ridloff, Michael Cloonan, and Tpg Gp A, Llc. Learn more on insiders at SION. What percentage of Sionna Therapeutics stock is owned by insiders? 3.90% of Sionna Therapeutics stock is owned by insiders. Learn more on SION's insider holdings. Which Sionna Therapeutics insiders have been buying company stock? The following insider purchased SION shares in the last 24 months: Tpg Gp A, Llc ($950,400.00). How much insider buying is happening at Sionna Therapeutics? Insiders have purchased a total of 60,000 SION shares in the last 24 months for a total of $950,400.00 bought. Which Sionna Therapeutics insiders have been selling company stock? The following insiders have sold SION shares in the last 24 months: Bruce Booth ($9,793,587.99), Elena Ridloff ($842,299.38), and Michael Cloonan ($1,352,245.35). How much insider selling is happening at Sionna Therapeutics? Insiders have sold a total of 406,171 Sionna Therapeutics shares in the last 24 months for a total of $11,988,132.72 sold. 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Oh No! This Is Why Investors Shouldn’t Worry This page (NASDAQ:SION) was last updated on 10/16/2025 by MarketBeat.com Staff From Our PartnersIs *BSEM* Oversold??BioStem Technologies Inc. (OTC: BSEM) is emerging as one of the most exciting MedTech stories of 2025. The com...Huge Alerts | SponsoredURGENT: The Market's 3 Red Flags Are FlashingHere’s the uncomfortable truth: The smartest investors in the world are already preparing for a crash befor...StockEarnings | SponsoredOut of 18,347 Cryptocurrencies... 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