$SION
Sionna Therapeutics, Inc. Common Stock
XNAS•Health Care•Pharmaceutical Preparations
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Plans & pricingDonateSionna Therapeutics, Inc. Common Stock
XNAS•Health Care•Pharmaceutical Preparations
Why is SION up today? It is at $4.76 (+0.21%), and our scanner flagged it 76 times on unusual volume this month. See the catalyst behind the move, real-time alerts the moment SION spikes, and full due diligence on SION — key stats, earnings, dilution and insider activity. Free.
Our scanner flagged $SION 76 times in the last 30 days. Create a free account to track $SION, build a watchlist, and get instant unusual-volume alerts, with a full day of premium now and 5 more when you verify your email, no card needed.
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SION is one of today's most active names, trading on unusually heavy volume (live price and day move above). Our scanner has fired 3 unusual-volume and momentum alerts on SION today, peaking at 5.2x its normal volume. A recent catalyst in the news: “INVESTOR ALERT: Pomerantz Law Firm Investigates Claims On Behalf of Investors of Sionna Therapeutics, Inc. - SION.” Early read: bearish.
Likely catalystSionna Therapeutics Announces Plans to Advance SION-451 +Reported 46% workforce reduction and other cost-saving measures prioritize advancing the dual combinationReported treatment periods, with mean exposures of all three components declining by approximately 25-30% on average while remaining relatively stable during placebo periods.Reported Following the completion of a comprehensive review of its operations, Sionna’s Board of Directors has approved a workforce reduction of approximately 46%, from an SEC filing. Read it →Latest filingSC 13D/AActivist 5%+ stake updatedSep 21, 2026 · 15 days agoSources: float & market cap via Polygon · short interest via FINRA · borrow & shortability via Alpaca · SSR from Reg SHO 201 · filings & dilution via SEC EDGAR · analysts via Nasdaq.
Auto-generated from public data for research and education. Not investment advice.
Blend of news sentiment, today’s move, and community votes. Not investment advice.
News, unusual-volume alerts, AI-trader trades and community chatter - the whole story, newest first.

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SION is one of today's most active names, trading on unusually heavy volume (live price and day move above). Our scanner has fired 3 unusual-volume and momentum alerts on SION today, peaking at 5.2x its normal volume. A recent catalyst in the news: “INVESTOR ALERT: Pomerantz Law Firm Investigates Claims On Behalf of Investors of Sionna Therapeutics, Inc. - SION.” Early read: bearish.
SION last traded at $4.76, up 0.21% on the day. The price and chart above update live during market hours (4 AM to 8 PM ET).
The SION Live Alerts panel on this page streams real-time unusual volume (RVOL), momentum, halt and 200-EMA alerts from our scanner the moment they fire. Our scanner has flagged SION 76 times in the last 30 days.
SION (Sionna Therapeutics, Inc. Common Stock) trades on XNAS, with a market cap of about $215M in the PHARMACEUTICAL PREPARATIONS sector.
That depends on your strategy and risk. Day traders look for volume, volatility and a clear trend. Use the live chart, RVOL alerts and 200-EMA context on this page to judge SION for yourself. This is not investment advice.
Live data from TheDesperateTrader scanner. Not investment advice.
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