Sionna Therapeutics

1D
1W
1M
3M
YTD
1Y
5Y
ALL

Why Robinhood?

Robinhood gives you the tools you need to put your money in motion. You can buy or sell SION and other ETFs, options, and stocks.

About SION

Sionna Therapeutics, Inc. operates as a clinical-stage biopharmaceutical company. The firm engages in researching, developing and commercializing novel medicines for cystic fibrosis. 

CEO
Michael Cloonan
CEOMichael Cloonan
Employees
59
Employees59
Headquarters
Waltham, Massachusetts
HeadquartersWaltham, Massachusetts
Founded
2019
Founded2019
Employees
59
Employees59

SION Key Statistics

Market cap
1.74B
Market cap1.74B
Price-Earnings ratio
-22.81
Price-Earnings ratio-22.81
Dividend yield
Dividend yield
Average volume
424.22K
Average volume424.22K
High today
$38.92
High today$38.92
Low today
$37.67
Low today$37.67
Open price
$37.82
Open price$37.82
Volume
240.26K
Volume240.26K
52 Week high
$46.46
52 Week high$46.46
52 Week low
$11.67
52 Week low$11.67

Stock Snapshot

As of today, Sionna Therapeutics(SION) shares are valued at $38.70. The company's market cap stands at 1.74B, with a P/E ratio of -22.81.

On 2026-05-01, Sionna Therapeutics(SION) stock moved within a range of $37.67 to $38.92. With shares now at $38.70, the stock is trading +2.7% above its intraday low and -0.6% below the session's peak.

Trading volume for Sionna Therapeutics(SION) stock has reached 240.26K, versus its average volume of 424.22K.

The stock's 52-week range extends from a low of $11.67 to a high of $46.46.

The stock's 52-week range extends from a low of $11.67 to a high of $46.46.

Analyst ratings

90%

of 10 ratings
Buy
90%
Hold
0%
Sell
10%

People also own

Based on the portfolios of people who own SION. This list is generated using Robinhood data, and it’s not a recommendation.

Similar Marketcap

This list is generated by looking at the six larger and six smaller companies by market cap in relation to this company.

Popular Stocks

This list is generated by looking at the top 100 stocks and ETFs most commonly held by Robinhood customers and showing a random subset

Newly Listed

This list is generated by showing companies that recently went public.

All investments involve risks, including the loss of principal. Securities trading offered through Robinhood Financial LLC, Member SIPC and a registered broker-dealer. Options are risky and aren’t suitable for all investors. To learn more about risks, read the Options Disclosure Document.