SION (Sionna Therapeutics) Book Value per Share: $6.39 (As of Mar. 2026)


SION Sionna Therapeutics Inc SION
12 GF Score
Price $43.12
! 3 Warning Signs
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What is Sionna Therapeutics Book Value per Share?

Sionna Therapeutics SION -1.98% 12 Book Value per Share is $6.39 as of Mar. 2026. GuruFocus rates SION with a GF Score™ of 12/100. The stock has 3 warning signs investors should review.

Sionna Therapeutics's book value per share for the quarter that ended in Mar. 2026 was $6.39.

Please click Growth Rate Calculation Example (GuruFocus) to see how GuruFocus calculates Wal-Mart Stores Inc (WMT)'s revenue growth rate. You can apply the same method to get the book value growth rate using book value per share data.

Sionna Therapeutics's current price is $43.12. Its book value per share for the quarter that ended in Mar. 2026 was $6.39. Hence, today's PB Ratio of Sionna Therapeutics is 6.74.

During the past 4 years, the highest P/B Ratio of Sionna Therapeutics was 6.92. The lowest was 0.00. And the median was 0.00.

Sionna Therapeutics  (NAS:SION) Book Value per Share Explanation

Usually a company's book value and Tangible Book per Share may not reflect its true value. The assets may be carried on the balance sheets at the original cost minus depreciation. This may underestimate the true economic values of the assets. It also may over-estimate their true economic value because the assets can become obsolete.

For financial companies such as banks and insurance companies, their assets may be reported in current market value of the assets owned. Book values of financial companies are more accurate indicator of the economic value of the company.

Sionna Therapeutics Book Value per Share Related Terms

Sionna Therapeutics Book Value per Share Historical Data

* Premium members only.

The historical data trend for Sionna Therapeutics's Book Value per Share can be seen below:

* For Operating Data section: All numbers are indicated by the unit behind each term and all currency related amount are in USD.
* For other sections: All numbers are in millions except for per share data, ratio, and percentage. All currency related amount are indicated in the company's associated stock exchange currency.

Sionna Therapeutics Book Value per Share Chart

Sionna Therapeutics Annual Data
Trend Dec22 Dec23 Dec24 Dec25
Book Value per Share
-1.65 -2.71 -3.86 6.86

Sionna Therapeutics Quarterly Data
Dec22 Dec23 Mar24 Jun24 Sep24 Dec24 Mar25 Jun25 Sep25 Dec25 Mar26
Book Value per Share Get a 7-Day Free Trial Premium Member Only Premium Member Only Premium Member Only 7.98 7.62 7.23 6.86 6.39

SION vs TYRA, RAPP, IOVA: Book Value per Share Comparison

For the Biotechnology subindustry, Sionna Therapeutics's PB Ratio, along with its competitors' market caps and PB Ratio data, can be viewed below:

* Competitive companies are chosen from companies within the same industry, with headquarter located in same country, with closest market capitalization; x-axis shows the market cap, and y-axis shows the term value; the bigger the dot, the larger the market cap. Note that "N/A" values will not show up in the chart.

Sionna Therapeutics PB Ratio vs Biotechnology Industry

For the Biotechnology industry and Healthcare sector, Sionna Therapeutics's PB Ratio distribution charts can be found below:

* The bar in red indicates where Sionna Therapeutics's PB Ratio falls into.


SION
12GF Score
Sionna Therapeutics Inc SION
Book Value per Share is just one metric. See GF Score™, valuation, warning signs, and more.
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Sionna Therapeutics Book Value per Share Calculation

Sionna Therapeutics's Book Value Per Share for the fiscal year that ended in Dec. 2025 is calculated as:

Book Value Per Share=(Total Stockholders Equity-Preferred Stock)/Shares Outstanding (EOP)
=(306.83-0.00)/44.72
=6.86

Sionna Therapeutics's Book Value Per Share for the quarter that ended in Mar. 2026 is calculated as:

Book Value Per Share=(Total Stockholders Equity-Preferred Stock)/Shares Outstanding (EOP)
=(288.21-0.00)/45.08
=6.39

* For Operating Data section: All numbers are indicated by the unit behind each term and all currency related amount are in USD.
* For other sections: All numbers are in millions except for per share data, ratio, and percentage. All currency related amount are indicated in the company's associated stock exchange currency.

Theoretically it is what the shareholders will receive if the company is liquidated. Total Stockholders Equity is a balance sheet item and equal to Total Assets less Total Liabilities of the company.

Book value may include intangible items which may come from the company's past acquisitions. Book value less intangibles is called Tangible Book.

Frequently Asked Questions Learn more about Book Value per Share →
What does a Book Value per Share of $6.39 mean?
Sionna Therapeutics (SION) has a Book Value per Share of $6.39 as of Mar. 2026. Book value per share gives the per-share value of a company's stockholder equity. View historical data on Sionna Therapeutics and its competitors.
Is Sionna Therapeutics' Book Value per Share too high?
Sionna Therapeutics' current Book Value per Share is $6.39. Overall, Sionna Therapeutics has a GF Score™ of 12/100, reflecting its overall financial health beyond just this single metric.
How does Sionna Therapeutics' Book Value per Share compare to TYRA and RAPP?
Sionna Therapeutics' Book Value per Share of $6.39 can be compared against companies in the Biotechnology industry. See the competitive comparison table and distribution chart on this page for a detailed peer-by-peer breakdown.
What is a good Book Value per Share for a Biotechnology company?
A good Book Value per Share depends on the Biotechnology industry context. However, Book Value per Share should not be evaluated in isolation — investors should consider it alongside profitability, growth, and financial strength metrics. Use the industry distribution chart on this page to see where any company falls relative to its peers.
What does a high Book Value per Share mean?
A high Book Value per Share can signal that a stock is expensive relative to its fundamentals. Book value per share gives the per-share value of a company's stockholder equity. View historical data on Sionna Therapeutics and its competitors. Sionna Therapeutics's current Book Value per Share is $6.39. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Sionna Therapeutics stock overvalued right now?
Sionna Therapeutics (SION) has a current Book Value per Share of $6.39. The current Book Value per Share is $6.39. Sionna Therapeutics' overall GF Score™ is 12/100 with 3 warning signs to review. Investors should evaluate multiple metrics — including profitability, growth, and financial strength — before making a decision.
How is Book Value per Share calculated?
Book Value per Share is calculated from a company's financial statements. For Sionna Therapeutics (SION), the current Book Value per Share is $6.39 as of Mar. 2026. GuruFocus calculates this using data sourced from SEC filings and annual reports. See the calculation section and 30-year financial data on this page for the full breakdown.

Sionna Therapeutics Business Description

Address 21 Hickory Drive, Suite 500, Waltham, MA, USA, 02451
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.
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$43.12
Price