SION (Sionna Therapeutics) Institutional Ownership: 103.72% (As of Jul. 07, 2026)


SION Sionna Therapeutics Inc SION
12 GF Score
Price $43.12
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What is Sionna Therapeutics Institutional Ownership?

Sionna Therapeutics SION -1.98% 12 Institutional Ownership is 103.72% as of Jul. 07, 2026. GuruFocus rates SION with a GF Score™ of 12/100. The stock has 3 warning signs investors should review.

Institutional ownership is the percentage of shares that are owned by institutions out of the total shares outstanding. As of today, Sionna Therapeutics's institutional ownership is 103.72%.

Insider Ownership is the percentage of shares that are owned by company insiders relative to the total shares outstanding. As of today, Sionna Therapeutics's Insider Ownership is 1.36%.

Float Percentage Of Total Shares Outstanding is the percentage of float shares relative to the total shares outstanding. As of today, Sionna Therapeutics's Float Percentage Of Total Shares Outstanding is 61.59%.

Sionna Therapeutics Institutional Ownership Historical Data

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The historical data trend for Sionna Therapeutics's Institutional Ownership 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 Institutional Ownership Chart

Sionna Therapeutics Historical Data

The historical data trend for Sionna Therapeutics can be seen below:

2025-09-30 2025-10-31 2025-11-30 2025-12-31 2026-01-31 2026-02-28 2026-03-31 2026-04-30 2026-05-31 2026-06-30
Institutional Ownership 14.10 13.43 15.35 18.83 18.86 19.58 19.99 19.95 20.08 20.74
SION
12GF Score
Sionna Therapeutics Inc SION
Institutional Ownership is just one metric. See GF Score™, valuation, warning signs, and more.
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Sionna Therapeutics Institutional Ownership Calculation

The percentage of shares that are owned by institutions out of the total shares outstanding.

What does a Institutional Ownership of 103.72% mean?
Sionna Therapeutics (SION) has a Institutional Ownership of 103.72% as of Jul. 07, 2026. Institutional ownership equals the percent of shares owned by financial institutions relative to total shares. View historical data on Sionna Therapeutics and its competitors.
Is Sionna Therapeutics' Institutional Ownership too high?
Sionna Therapeutics' current Institutional Ownership is 103.72%. Overall, Sionna Therapeutics has a GF Score™ of 12/100, reflecting its overall financial health beyond just this single metric.
How does Sionna Therapeutics' Institutional Ownership compare to TYRA and RAPP?
Sionna Therapeutics' Institutional Ownership of 103.72% 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 Institutional Ownership for a Biotechnology company?
A good Institutional Ownership depends on the Biotechnology industry context. However, Institutional Ownership 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 Institutional Ownership mean?
A high Institutional Ownership can signal that a stock is expensive relative to its fundamentals. Institutional ownership equals the percent of shares owned by financial institutions relative to total shares. View historical data on Sionna Therapeutics and its competitors. Sionna Therapeutics's current Institutional Ownership is 103.72%. 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 Institutional Ownership of 103.72%. The current Institutional Ownership is 103.72%. 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 Institutional Ownership calculated?
Institutional Ownership is calculated from a company's financial statements. For Sionna Therapeutics (SION), the current Institutional Ownership is 103.72% as of Jul. 07, 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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