{"id":995029,"date":"2026-08-13T12:54:24","date_gmt":"2026-08-13T16:54:24","guid":{"rendered":"https:\/\/www.marketnewsdesk.com\/index.php\/sion-shareholder-investigation-suewallst-notifies-investors-of-potential-securities-claims-involving-sionna-therapeutics\/"},"modified":"2026-08-13T12:54:24","modified_gmt":"2026-08-13T16:54:24","slug":"sion-shareholder-investigation-suewallst-notifies-investors-of-potential-securities-claims-involving-sionna-therapeutics","status":"publish","type":"post","link":"https:\/\/www.marketnewsdesk.com\/index.php\/sion-shareholder-investigation-suewallst-notifies-investors-of-potential-securities-claims-involving-sionna-therapeutics\/","title":{"rendered":"SION SHAREHOLDER INVESTIGATION: SueWallSt Notifies Investors of Potential Securities Claims Involving Sionna Therapeutics"},"content":{"rendered":"<div class=\"xn-newslines\">\n<p class=\"xn-distributor\">PR Newswire<\/p>\n<\/p><\/div>\n<div class=\"xn-content\">\n<p>\n        <i> Sionna Therapeutics shares traded above $44 in July 2026; after the SION-719 Phase 2a readout, roughly 90% of that value was lost. SueWallSt notifies investors of a pending investigation into potential securities law violations, and SION investors who lost money have legal rights worth reviewing now. <\/i>\n      <\/p>\n<p>\n        <span class=\"legendSpanClass\">NEW YORK<\/span>, <span class=\"legendSpanClass\">Aug. 13, 2026<\/span> \/PRNewswire\/ &#8212; Shareholders of Sionna Therapeutics (NASDAQ: SION) watched approximately 90% of the stock&#8217;s value disappear following the Company&#8217;s disclosure that its Phase 2a PreciSION CF trial of SION-719 failed to achieve its key activity endpoint for sweat chloride reduction. If you held SION shares and suffered a loss, you have rights and a limited window to assert them &#8212; <a href=\"https:\/\/edge.prnewswire.com\/c\/link\/?t=0&amp;l=en&amp;o=4752108-7&amp;h=3631253057&amp;u=https%3A%2F%2Fsuewallst.com%2Finvestigations%2Fsionna-therapeutics-inc-investigation-sion%3Fprid%3D200683%26wire%3D4&amp;a=click+here+to+submit+your+information+\" target=\"_blank\" rel=\"nofollow\">click here to submit your information <\/a>. You may also contact Joseph E. Levi, Esq. via email at <a href=\"mailto:jlevi@SueWallSt.com\" target=\"_blank\" rel=\"nofollow\">jlevi@SueWallSt.com <\/a>\u00a0or by telephone at (888) SueWallSt.<\/p>\n<div class=\"PRN_ImbeddedAssetReference\" id=\"DivAssetPlaceHolder1\">\n<p>\n          <img decoding=\"async\" src=\"https:\/\/mmx.prnewswire.com\/media\/MS1812443\/suewallst-logo-1-Logo.jpg?id=OA2882505\" title=\"SueWallSt.com\" alt=\"SueWallSt.com\" \/>\n        <\/p>\n<\/p><\/div>\n<p>Investors do not need to still own SION shares to participate. Eligibility in the investigation is based on when shares were purchased and the losses sustained &#8212; not on whether the position was sold before or after the readout. There is no minimum loss amount, and submitting information carries no cost and no obligation.<\/p>\n<p>The reported result was a placebo-adjusted sweat chloride change of -1.0 mmol\/L (p=0.7), and Sionna stated it would not advance SION-719 as an add-on therapy. Shareholders who wish to understand what recovery options may be available, and how their own purchase records factor in, can have their losses reviewed at no charge.<\/p>\n<p>SION shareholders who lost money are encouraged to <a href=\"https:\/\/edge.prnewswire.com\/c\/link\/?t=0&amp;l=en&amp;o=4752108-7&amp;h=1664760002&amp;u=https%3A%2F%2Fsuewallst.com%2Finvestigations%2Fsionna-therapeutics-inc-investigation-sion%3Fprid%3D200683%26wire%3D4&amp;a=have+their+losses+evaluated+at+no+cost+\" target=\"_blank\" rel=\"nofollow\">have their losses evaluated at no cost <\/a>\u00a0or call (888) SueWallSt.<\/p>\n<p>\n        <b> WHY SUEWALLST <\/b>: SueWallSt is powered by Levi &amp; Korsinsky LLP. Levi &amp; Korsinsky LLP has established itself as a nationally-recognized securities litigation firm that has secured hundreds of millions of dollars for aggrieved shareholders and built a track record of winning high-stakes cases. The firm has extensive expertise representing investors in complex securities litigation and a team of over 70 employees to serve our clients. For seven years in a row, Levi &amp; Korsinsky has ranked in ISS Securities Class Action Services&#8217; Top 50 Report as one of the top securities litigation firms in the United States.<\/p>\n<p>Frequently Asked Questions About the SION Investigation<\/p>\n<p>\n        <b> Q: Who is eligible to participate in the SION investigation? <\/b>\u00a0A: Investors who purchased SION stock or securities and suffered financial losses may be eligible. Eligibility is based on purchase date and documented losses &#8212; not on whether you still hold the shares.<\/p>\n<p>\n        <b> Q: How much did SION stock drop? <\/b>\u00a0A: Shares fell approximately 90% after the Company disclosed that the Phase 2a PreciSION CF trial of SION-719failed to achieve its key activity endpoint for sweat chloride reduction and that it would not advance SION-719 as an add-on therapy. Investors who purchased shares and suffered losses may be eligible to seek compensation.<\/p>\n<p>\n        <b> Q: When did Sionna Therapeutics <span>allegedly<\/span> mislead investors? <\/b>\u00a0A: The investigation concerns statements made before the corrective disclosure that <span>allegedly<\/span> caused investors to purchase securities at inflated prices.<\/p>\n<p>\n        <b> Q: What if I already sold my SION shares &#8212; can I still recover losses? <\/b>\u00a0A: Yes. Eligibility is based on when you purchased, not whether you still hold the shares. Investors who bought SION and sold at a loss may still participate in the investigation.<\/p>\n<p>\n        <b> Q: What if my SION losses are small &#8212; is it still worth contacting a lawyer? <\/b>\u00a0A: Yes. There is no minimum loss amount required to participate in the investigation.<\/p>\n<p>\n        <b> Q: Do I need to go to court or give testimony? <\/b>\u00a0A: No. Participating in the investigation does not require court appearances or depositions. If legal action is later pursued, the overwhelming majority of affected investors never appear in court either.<\/p>\n<p>\n        <b> Q: What if I live outside the United States? <\/b>\u00a0A: U.S. securities <span>fraud<\/span> investigations generally cover purchases on U.S. exchanges regardless of the investor&#8217;s country of residence.<\/p>\n<p>\n        <b> Q: What do SION investors need to do right now? <\/b>\u00a0A: Gather brokerage records including purchase dates, share quantities, and prices paid. Contact SueWallSt, a brand of Levi &amp; Korsinsky LLP, for a no-cost, no-obligation evaluation at <a href=\"mailto:jlevi@levikorsinsky.com\" target=\"_blank\" rel=\"nofollow\">jlevi@levikorsinsky.com <\/a>\u00a0or (212) 363-7500. No immediate action is required to remain eligible to participate in the investigation.<\/p>\n<p>CONTACT:\\<\/p>\n<p>Levi &amp; Korsinsky, LLP\\<\/p>\n<p>Joseph E. Levi, Esq.\\<\/p>\n<p>33 Whitehall Street, 27th Floor\\<\/p>\n<p>New York, NY 10004\\<\/p>\n<p>\n        <a href=\"mailto:jlevi@SueWallSt.com\" target=\"_blank\" rel=\"nofollow\"> jlevi@SueWallSt.com <\/a>\\<\/p>\n<p>Tel: (888) SueWallSt\\<\/p>\n<p>Fax: (212) 363-7171<\/p>\n<p>Attorney Advertising. Prior results do not guarantee similar outcomes.<\/p>\n<p id=\"PURL\">\n        <img loading=\"lazy\" decoding=\"async\" title=\"Cision\" width=\"12\" height=\"12\" alt=\"Cision\" src=\"https:\/\/edge.prnewswire.com\/c\/img\/favicon.png?sn=NY26015&amp;sd=2026-08-13\" \/> View original content to download multimedia:<a id=\"PRNURL\" rel=\"nofollow\" href=\"https:\/\/www.prnewswire.com\/news-releases\/sion-shareholder-investigation-suewallst-notifies-investors-of-potential-securities-claims-involving-sionna-therapeutics-302851168.html\" target=\"_blank\">https:\/\/www.prnewswire.com\/news-releases\/sion-shareholder-investigation-suewallst-notifies-investors-of-potential-securities-claims-involving-sionna-therapeutics-302851168.html<\/a><\/p>\n<p>SOURCE SueWallSt.com<\/p>\n<\/p><\/div>\n<p>    <img decoding=\"async\" alt=\"\" src=\"https:\/\/rt.prnewswire.com\/rt.gif?NewsItemId=NY26015&amp;Transmission_Id=202608131245PR_NEWS_USPR_____NY26015&amp;DateId=20260813\" style=\"border:0px;width:1px;height:1px\" \/><\/p>\n","protected":false},"excerpt":{"rendered":"<p>PR Newswire Sionna Therapeutics shares traded above $44 in July 2026; after the SION-719 Phase 2a readout, roughly 90% of that value was lost. SueWallSt notifies investors of a pending investigation into potential securities law violations, and SION investors who lost money have legal rights worth reviewing now. NEW YORK, Aug. 13, 2026 \/PRNewswire\/ &#8212; Shareholders of Sionna Therapeutics (NASDAQ: SION) watched approximately 90% of the stock&#8217;s value disappear following the Company&#8217;s disclosure that its Phase 2a PreciSION CF trial of SION-719 failed to achieve its key activity endpoint for sweat chloride reduction. If you held SION shares and suffered a loss, you have rights and a limited window to assert them &#8212; click here to submit your information . &hellip; <\/p>\n<p class=\"link-more\"><a href=\"https:\/\/www.marketnewsdesk.com\/index.php\/sion-shareholder-investigation-suewallst-notifies-investors-of-potential-securities-claims-involving-sionna-therapeutics\/\" class=\"more-link\">Continue reading<span class=\"screen-reader-text\"> &#8220;SION SHAREHOLDER INVESTIGATION: SueWallSt Notifies Investors of Potential Securities Claims Involving Sionna Therapeutics&#8221;<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[],"tags":[],"class_list":["post-995029","post","type-post","status-publish","format-standard","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>SION SHAREHOLDER INVESTIGATION: SueWallSt Notifies Investors of Potential Securities Claims Involving Sionna Therapeutics - Market Newsdesk<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.marketnewsdesk.com\/index.php\/sion-shareholder-investigation-suewallst-notifies-investors-of-potential-securities-claims-involving-sionna-therapeutics\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"SION SHAREHOLDER INVESTIGATION: SueWallSt Notifies Investors of Potential Securities Claims Involving Sionna Therapeutics - Market Newsdesk\" \/>\n<meta property=\"og:description\" content=\"PR Newswire Sionna Therapeutics shares traded above $44 in July 2026; after the SION-719 Phase 2a readout, roughly 90% of that value was lost. SueWallSt notifies investors of a pending investigation into potential securities law violations, and SION investors who lost money have legal rights worth reviewing now. NEW YORK, Aug. 13, 2026 \/PRNewswire\/ &#8212; Shareholders of Sionna Therapeutics (NASDAQ: SION) watched approximately 90% of the stock&#8217;s value disappear following the Company&#8217;s disclosure that its Phase 2a PreciSION CF trial of SION-719 failed to achieve its key activity endpoint for sweat chloride reduction. If you held SION shares and suffered a loss, you have rights and a limited window to assert them &#8212; click here to submit your information . &hellip; Continue reading &quot;SION SHAREHOLDER INVESTIGATION: SueWallSt Notifies Investors of Potential Securities Claims Involving Sionna Therapeutics&quot;\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.marketnewsdesk.com\/index.php\/sion-shareholder-investigation-suewallst-notifies-investors-of-potential-securities-claims-involving-sionna-therapeutics\/\" \/>\n<meta property=\"og:site_name\" content=\"Market Newsdesk\" \/>\n<meta property=\"article:published_time\" content=\"2026-08-13T16:54:24+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/mmx.prnewswire.com\/media\/MS1812443\/suewallst-logo-1-Logo.jpg?id=OA2882505\" \/>\n<meta name=\"author\" content=\"Newsdesk\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Newsdesk\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"4 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.marketnewsdesk.com\\\/index.php\\\/sion-shareholder-investigation-suewallst-notifies-investors-of-potential-securities-claims-involving-sionna-therapeutics\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.marketnewsdesk.com\\\/index.php\\\/sion-shareholder-investigation-suewallst-notifies-investors-of-potential-securities-claims-involving-sionna-therapeutics\\\/\"},\"author\":{\"name\":\"Newsdesk\",\"@id\":\"https:\\\/\\\/www.marketnewsdesk.com\\\/#\\\/schema\\\/person\\\/482f27a394d4fda80ecb5499e519d979\"},\"headline\":\"SION SHAREHOLDER INVESTIGATION: SueWallSt Notifies Investors of Potential Securities Claims Involving Sionna Therapeutics\",\"datePublished\":\"2026-08-13T16:54:24+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/www.marketnewsdesk.com\\\/index.php\\\/sion-shareholder-investigation-suewallst-notifies-investors-of-potential-securities-claims-involving-sionna-therapeutics\\\/\"},\"wordCount\":751,\"image\":{\"@id\":\"https:\\\/\\\/www.marketnewsdesk.com\\\/index.php\\\/sion-shareholder-investigation-suewallst-notifies-investors-of-potential-securities-claims-involving-sionna-therapeutics\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/mmx.prnewswire.com\\\/media\\\/MS1812443\\\/suewallst-logo-1-Logo.jpg?id=OA2882505\",\"inLanguage\":\"en-US\"},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.marketnewsdesk.com\\\/index.php\\\/sion-shareholder-investigation-suewallst-notifies-investors-of-potential-securities-claims-involving-sionna-therapeutics\\\/\",\"url\":\"https:\\\/\\\/www.marketnewsdesk.com\\\/index.php\\\/sion-shareholder-investigation-suewallst-notifies-investors-of-potential-securities-claims-involving-sionna-therapeutics\\\/\",\"name\":\"SION SHAREHOLDER INVESTIGATION: SueWallSt Notifies Investors of Potential Securities Claims Involving Sionna Therapeutics - 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SueWallSt notifies investors of a pending investigation into potential securities law violations, and SION investors who lost money have legal rights worth reviewing now. NEW YORK, Aug. 13, 2026 \/PRNewswire\/ &#8212; Shareholders of Sionna Therapeutics (NASDAQ: SION) watched approximately 90% of the stock&#8217;s value disappear following the Company&#8217;s disclosure that its Phase 2a PreciSION CF trial of SION-719 failed to achieve its key activity endpoint for sweat chloride reduction. If you held SION shares and suffered a loss, you have rights and a limited window to assert them &#8212; click here to submit your information . &hellip; Continue reading \"SION SHAREHOLDER INVESTIGATION: SueWallSt Notifies Investors of Potential Securities Claims Involving Sionna Therapeutics\"","og_url":"https:\/\/www.marketnewsdesk.com\/index.php\/sion-shareholder-investigation-suewallst-notifies-investors-of-potential-securities-claims-involving-sionna-therapeutics\/","og_site_name":"Market Newsdesk","article_published_time":"2026-08-13T16:54:24+00:00","og_image":[{"url":"https:\/\/mmx.prnewswire.com\/media\/MS1812443\/suewallst-logo-1-Logo.jpg?id=OA2882505","type":"","width":"","height":""}],"author":"Newsdesk","twitter_card":"summary_large_image","twitter_misc":{"Written by":"Newsdesk","Est. reading time":"4 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/www.marketnewsdesk.com\/index.php\/sion-shareholder-investigation-suewallst-notifies-investors-of-potential-securities-claims-involving-sionna-therapeutics\/#article","isPartOf":{"@id":"https:\/\/www.marketnewsdesk.com\/index.php\/sion-shareholder-investigation-suewallst-notifies-investors-of-potential-securities-claims-involving-sionna-therapeutics\/"},"author":{"name":"Newsdesk","@id":"https:\/\/www.marketnewsdesk.com\/#\/schema\/person\/482f27a394d4fda80ecb5499e519d979"},"headline":"SION SHAREHOLDER INVESTIGATION: SueWallSt Notifies Investors of Potential Securities Claims Involving Sionna Therapeutics","datePublished":"2026-08-13T16:54:24+00:00","mainEntityOfPage":{"@id":"https:\/\/www.marketnewsdesk.com\/index.php\/sion-shareholder-investigation-suewallst-notifies-investors-of-potential-securities-claims-involving-sionna-therapeutics\/"},"wordCount":751,"image":{"@id":"https:\/\/www.marketnewsdesk.com\/index.php\/sion-shareholder-investigation-suewallst-notifies-investors-of-potential-securities-claims-involving-sionna-therapeutics\/#primaryimage"},"thumbnailUrl":"https:\/\/mmx.prnewswire.com\/media\/MS1812443\/suewallst-logo-1-Logo.jpg?id=OA2882505","inLanguage":"en-US"},{"@type":"WebPage","@id":"https:\/\/www.marketnewsdesk.com\/index.php\/sion-shareholder-investigation-suewallst-notifies-investors-of-potential-securities-claims-involving-sionna-therapeutics\/","url":"https:\/\/www.marketnewsdesk.com\/index.php\/sion-shareholder-investigation-suewallst-notifies-investors-of-potential-securities-claims-involving-sionna-therapeutics\/","name":"SION SHAREHOLDER INVESTIGATION: SueWallSt Notifies Investors of Potential Securities Claims Involving Sionna Therapeutics - 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