Sionna Therapeutics, Inc. (SION) Stock Chart
SION price chart
Daily prices adjusted for splits and dividends. 1D and 5D show delayed intraday prices. Markers: E earnings, D dividend, S split.
Technical snapshot
Key levels & statistics
SION performance vs the market
Total return, dividends reinvestedSION monthly returns
SION historical prices
SION dividends & splits
About the SION chart
Sionna Therapeutics (SION) closed at $3.89 on October 16, 2026, down 90.5% so far this year. The stock is trading 87.8% below its 200-day moving average of $31.87, which technical analysts usually read as a long-term downtrend. Over the past year SION returned −88.1% including dividends, behind the S&P 500 (+16.8%).
This page charts the full trading history of Sionna Therapeutics, Inc. stock. Daily prices come from EODHD and are adjusted for stock splits and dividends, so returns over long periods are comparable. For the latest quote, company profile, earnings and news, see the SION stock overview.
SION chart FAQ
What is Sionna Therapeutics's all-time high stock price?
The highest closing price for SION was $51.04 on August 7, 2026 (adjusted for stock splits). As of the October 16, 2026 close it traded 92.4% below that level.
What is the 52-week range of SION stock?
Over the 52 weeks to October 16, 2026, SION traded between an intraday low of $3.77 on October 16, 2026 and an intraday high of $54.97 on August 7, 2026.
Is SION above its 200-day moving average?
No. On October 16, 2026 SION closed at $3.89, 87.8% below its 200-day simple moving average of $31.87. The 50-day average was $6.74.
How has SION stock performed compared with the S&P 500?
Including reinvested dividends, SION returned −88.1% over the past year, compared with +16.8% for the S&P 500 (SPY).
Does Sionna Therapeutics pay a dividend?
Sionna Therapeutics has not paid a dividend in the past 12 months.
How do I read the SION chart?
Pick a time range above the chart and choose candlesticks, a line or an area chart. Moving averages, Bollinger Bands, volume, RSI and MACD can be switched on with the indicator buttons, and "Compare" plots SION against the S&P 500, its sector or a competitor as a percentage change. Chart prices are adjusted for splits and dividends.