Sionna Therapeutics, Inc. (SION)

NASDAQ

$4.14

$+0.13

(+3.24%)

Previous Close: ⁦$4.01⁩

Market Closed

Sionna Therapeutics, Inc. (SION) Live Price Chart

Last updated: ⁦2026-10-21 06:12:20⁩. Prices reflect the latest closing data and will resume updating on the next trading day. Stock price data is sourced from Massive.

Summary

Sionna Therapeutics, Inc. (SION) operates in the PHARMACEUTICAL PREPARATIONS sector and is listed on NASDAQ. The stock is currently priced at $4.15, with a market capitalization of $175.88M and a P/E ratio of --. Over the past 52 weeks, its price has ranged from $3.78 to $54.97. This page covers its latest market performance, valuation, price trends and company information.

Key Market Data

Market Cap	$175.88M
Open	$4.06
Day's High	$54.97
Day's Low	$3.78
Previous Close	$4.01
Volume	918.91K
Average Volume	2.26M
P/E Ratio	--
52-Week High	$54.97
52-Week Low	$3.78
Dividend Yield	--
Earnings Date	--

Sionna Therapeutics, Inc. (SION) Latest Closing Stock Price

Sionna Therapeutics, Inc. (SION) last closed at $4.01 as of 2026-10-20 23:31:00, unchanged from the previous close of $4.01.

During the latest regular trading session, SION traded between $3.78 and $54.97, with a volume of 918.91K shares. The closing price was near the lower end and near the lower end of its 52-week range.

Sionna Therapeutics, Inc. (SION) 7-Day Stock Price Change

Over the past seven days, Sionna Therapeutics, Inc. (SION) moved from $4.90 to $4.15, representing a decline of 15.41% ($0.76).

The stock traded between $3.78 and $5.12 during the period. The latest price is near the lower end of the 7-day range, indicating strong downward.

The average daily volume was 1.03 million shares, down versus the previous seven-day period, indicating lower trading activity.

SION 52-Week Price Position

Position in Range: 0.7%

52W Low$3.78

52W High$54.97

SION is currently trading at $4.15, placing it 0.7% of the way from its 52-week low of $3.78 to its 52-week high of $54.97. This percentage reflects the stock's relative position within its 52-week trading range, not its valuation or future performance.

What is Sionna Therapeutics, Inc. (SION)?

Sionna Therapeutics Inc is a clinical-stage biopharmaceutical company on a mission to revolutionize the current treatment paradigm for cystic fibrosis (CF) patients by developing novel medicines that normalize the function of the cystic fibrosis transmembrane conductance regulator (CFTR) protein to deliver clinically meaningful benefits to CF patients. CF is a progressive and life-threatening genetic disease caused by inherited mutations in the CFTR gene, which heads to insufficient CFTR function. The Company is managed as one operating segment focused on the research and development of cystic fibrosis therapies.

Sionna Therapeutics, Inc. Information

Industry	PHARMACEUTICAL PREPARATIONS
Employees	59
Exchange	NASDAQ
Company Website	https://www.sionnatx.com

How to Buy Sionna Therapeutics, Inc. (SION) Stock on MEXC

Eligible investors can buy real shares of Sionna Therapeutics, Inc. (SION) through MEXC RealStocks. Follow these three steps to open a RealStocks account, transfer USDT, and place a US stock order.

Step 1: Open and Verify Your RealStocks Account

Log in to the MEXC App, go to Trade → RealStocks, and select Open Account. Complete the required account-opening and identity verification process with MEXC's partner licensed broker.

Step 2: Transfer USDT to Your RealStocks Account

Go to Wallets → RealStocks and transfer USDT from your Spot Account to your RealStocks Account. RealStocks are quoted in USD, while account funding can be completed using USDT.

Step 3: Search for SION and Place Your Order

Open the RealStocks trading page and search for SION. Select a market or limit order, enter the price and quantity as required, review the order details, and submit your order. Once filled, the corresponding real shares will be held in your RealStocks Account.

Frequently Asked Questions (FAQ)

1.What is Sionna Therapeutics, Inc. (SION) stock price today?

Sionna Therapeutics, Inc. (SION) is currently trading at $ 4.15, up 3.37% ($0.13) from the previous close of $ 4.01. Intraday prices update in real time during regular trading hours.

2.Is SION stock going up or down today?

As of 2026-10-20 23:31:00, SION is trading at $ 4.15, up 3.37% ($0.13) from its previous close of $ 4.01. The stock has traded between $ 3.78 and $ 54.97 during today’s regular session. Past price movements do not guarantee future results.

3.What is SION pre-market price?

As of 2026-10-20 23:31:00, SION is trading at $ 4.04 in pre-market trading, up 0.62% ($0.03) from the previous close of $ 4.01. Pre-market prices reflect trading activity before the regular session opens and may experience lower liquidity and higher volatility.

4.What is SION after-hours price?

As of 2026-10-20 23:31:00, SION is trading at $ 4.15 in after-hours trading, up 3.49% ($0.14) from the regular-session close of $ 4.01. After-hours prices may differ from the regular session’s opening price due to lower liquidity and wider bid-ask spreads.

5.Is SION stock trading now?

SION trades on the NASDAQ exchange during regular hours, Monday through Friday, 9:30 AM to 4:00 PM ET, excluding public holidays. Pre-market and after-hours trading are also available through select brokers outside these hours.

6.Where does SION sit relative to its 52-week high and low?

Over the past 52 weeks, SION has traded between a low of $ 3.78 and a high of $ 54.97. At $ 4.15, the stock is positioned 0.7% of the way from its 52-week low to its 52-week high, providing context for its current price within the one-year trading range.

7.What sector is Sionna Therapeutics, Inc. in?

Sionna Therapeutics, Inc. (SION) operates in the PHARMACEUTICAL PREPARATIONS sector. Sector classification helps investors compare it with companies exposed to similar market trends and competitive conditions.

8.What is Sionna Therapeutics, Inc.'s market capitalization and where is it listed?

Sionna Therapeutics, Inc. is listed on the NASDAQ exchange with a market capitalization of $ 175.88M. Market cap reflects the total market value of all outstanding shares and is commonly used to classify stocks by size.

9.How is SION valued in terms of P/E ratio and EPS?

SION trades at a P/E ratio of --, based on trailing-twelve-month EPS of $ -2.15. P/E ratio compares the stock price to earnings per share and is a common starting point for assessing valuation relative to peers.

10.Does Sionna Therapeutics, Inc. pay a dividend?

Sionna Therapeutics, Inc. pays an indicated annual cash dividend of $ 0.00 per share, with a current dividend yield of 0.00% based on the latest share price. Dividend policies are subject to change at the board's discretion.