NASDAQ: SION
Sionna Therapeutics Inc Stock

$35.92-0.13 (-0.36%)
Updated Jun 12, 2026
SION Price
$35.92
Fair Value Price
$1.25
Market Cap
$1.62B
52 Week Low
$13.51
52 Week High
$48.45
P/E
-18.71x
P/B
5.63x
P/S
N/A
PEG
N/A
Dividend Yield
N/A
Revenue
$0.00
Earnings
-$85.57M
Gross Margin
N/A
Operating Margin
N/A
Profit Margin
N/A
Debt to Equity
0.06
Operating Cash Flow
-$72M
Beta
0.99
Next Earnings
N/A
Ex-Dividend
N/A
Next Dividend
N/A

SION Overview

Operating as a biopharmaceutical company, Sionna Therapeutics, Inc. is dedicated to transforming the treatment landscape for individuals with cystic fibrosis. This is achieved by developing innovative medicines designed to restore the normal function of the cystic fibrosis transmembrane conductance regulator.

Zen Rating

Our proven quant model uses 115 proprietary factors, including AI, to determine SION's potential to beat the market

DSell
  • Stocks with a Zen Rating of Sell (D) had an average loss of -4.50% per year. Learn More

Zen Rating Component Grades

D
Zen Rating uses advanced AI algorithms that detect subtle patterns in market data; it anticipates future trends that point to superior stock price results.

Industry: Biotech

Industry Rating
F
SION
Ranked
#321 of 463

Top Ranked Stocks in Industry

Name / TickerPriceZen Rating
$230.56A
$53.13A
$15.82A
View Top Biotech Stocks

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SION News

Overview

Due Diligence Score

Industry Average (24)
You've viewed Due Diligence Score for 10/10 free stocks. Upgrade to Premium to see how SION scored across 33 valuation, financial, forecast, performance, and dividend due diligence checks.

Due Diligence Checks

SION ($35.92) is overvalued by 2,783.92% relative to our estimate of its Fair Value price of $1.25 based on Discounted Cash Flow (DCF) modelling
Below Fair Value Valuation
SION ($35.92) is not significantly undervalued (2,783.92%) relative to our estimate of its Fair Value price of $1.25 based on Discounted Cash Flow (DCF) modelling, when including a healthy margin of safety
Significantly Below Fair Value Valuation
SION is unprofitable, so we... subscribe to Premium to read more.
Below Benjamin Graham Formula Value Valuation
There are 30 more SION due diligence checks available for Premium users.

Valuation

SION fair value

Fair Value of SION stock based on Discounted Cash Flow (DCF)

Price
$35.92
Fair Value
$1.25
Overvalued by
2,783.92%
SION ($35.92) is overvalued by... subscribe to Premium to read more.
Below Fair Value Valuation
SION ($35.92) is not significantly... subscribe to Premium to read more.
Significantly Below Fair Value Valuation
SION is unprofitable, so we... subscribe to Premium to read more.
Below Benjamin Graham Formula Value Valuation

SION price to earnings (PE)

For valuing profitable companies with steady earnings

Company
-18.71x
Industry
16.53x
Market
14.15x

SION price to book (PB)

For valuing companies that are loss-making or have lots of physical asset

Company
5.63x
Industry
4.85x
SION is poor value based... subscribe to Premium to read more.
P/B vs Industry Valuation

SION's financial health

Profit margin

Revenue
$0.0
Net Income
-$26.8M
Profit Margin
0%
SION's cash and short-term investments... subscribe to Premium to read more.
Interest Coverage Financials

Assets to liabilities

Assets
$305.0M
Liabilities
$16.8M
Debt to equity
0.06
SION's short-term assets ($220.96M) exceed... subscribe to Premium to read more.
Short-term Liabilities Financials
SION's short-term assets ($220.96M) exceed... subscribe to Premium to read more.
Long-term Liabilities Financials
SION's debt to equity ratio... subscribe to Premium to read more.
Healthy Debt to Equity Financials

Cash flow

Operating
-$21.8M
Investing
$24.8M
Financing
$1.9M
SION's cash and short-term investments... subscribe to Premium to read more.
Debt Coverage Financials

SION vs Biotech Stocks

TickerZen RatingMarket Cap1d %P/EP/B
SIOND$1.62B-0.36%-18.71x5.63x
AMLXD$1.62B+4.89%-9.86x5.94x
SEPNC$1.62B+5.64%-44.38x4.28x
SNDXC$1.62B+1.90%-6.54x38.85x
SRPTC$1.62B+2.07%25.52x1.07x

Sionna Therapeutics Stock FAQ

What is Sionna Therapeutics's quote symbol?

(NASDAQ: SION) Sionna Therapeutics trades on the NASDAQ under the ticker symbol SION. Sionna Therapeutics stock quotes can also be displayed as NASDAQ: SION.

If you're new to stock investing, here's how to buy Sionna Therapeutics stock.

What is the 52 week high and low for Sionna Therapeutics (NASDAQ: SION)?

(NASDAQ: SION) Sionna Therapeutics's 52-week high was $48.45, and its 52-week low was $13.51. It is currently -25.85% from its 52-week high and 165.88% from its 52-week low.

How much is Sionna Therapeutics stock worth today?

(NASDAQ: SION) Sionna Therapeutics currently has 45,150,330 outstanding shares. With Sionna Therapeutics stock trading at $35.92 per share, the total value of Sionna Therapeutics stock (market capitalization) is $1.62B.

Sionna Therapeutics stock was originally listed at a price of $25.00 in Feb 7, 2025. If you had invested in Sionna Therapeutics stock at $25.00, your return over the last year would have been 43.68% (not including any dividends or dividend reinvestments).

How much is Sionna Therapeutics's stock price per share?

(NASDAQ: SION) Sionna Therapeutics stock price per share is $35.92 today (as of Jun 12, 2026).

What is Sionna Therapeutics's Market Cap?

(NASDAQ: SION) Sionna Therapeutics's market cap is $1.62B, as of Jun 14, 2026.

Market cap (market capitalization) is the total market value of a publicly traded company's outstanding shares.

Sionna Therapeutics's market cap is calculated by multiplying SION's current stock price of $35.92 by SION's total outstanding shares of 45,150,330.
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Information is provided 'as-is' and solely for informational purposes and is not advice. WallStreetZen does not bear any responsibility for any losses or damage that may occur as a result of reliance on this data.