UPB (Upstream Bio) Insider Ownership: 0.32 % (As of Aug. 18, 2026)

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UPB Upstream Bio Inc UPB
13 GF Score
Price $6.90
! 3 Warning Signs
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What is Upstream Bio Insider Ownership?

Upstream Bio UPB -3.36% 13 Insider Ownership is 0.32 % as of Aug. 18, 2026. GuruFocus rates UPB with a GF Score™ of 13/100. The stock has 3 warning signs investors should review.

Insider ownership is the percentage of shares that are owned by company insiders relative to the total shares outstanding. As of today, Upstream Bio's insider ownership is 0.32%.

Institutional Ownership is the percentage of shares that are owned by institutions out of the total shares outstanding. As of today, Upstream Bio's Institutional Ownership is 80.59%.

Float Percentage Of Total Shares Outstanding is the percentage of float shares relative to the total shares outstanding. As of today, Upstream Bio's Float Percentage Of Total Shares Outstanding is 65.09%.

Upstream Bio Insider Ownership Historical Data

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The historical data trend for Upstream Bio's Insider 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.

Upstream Bio Insider Ownership Chart

Upstream Bio Historical Data

The historical data trend for Upstream Bio can be seen below:

2026-01-31 2026-02-28 2026-05-31 2026-06-30 2026-07-31
Insider Ownership 0.34 0.34 0.32 0.32 0.32
UPB
13GF Score
Upstream Bio Inc UPB
Insider Ownership is just one metric. See GF Score™, valuation, warning signs, and more.
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Upstream Bio Insider Ownership Calculation

The percentage of shares that are owned by company insiders relative to the total shares outstanding.

Frequently Asked Questions Learn more about Insider Ownership →
What does a Insider Ownership of 0.32 % mean?
Upstream Bio (UPB) has a Insider Ownership of 0.32 % as of Aug. 18, 2026. Insider ownership equals the percent of shares owned by company insiders relative to total shares. View historical data on Upstream Bio and its competitors.
Is Upstream Bio's Insider Ownership too high?
Upstream Bio's current Insider Ownership is 0.32 %. Overall, Upstream Bio has a GF Score™ of 13/100, reflecting its overall financial health beyond just this single metric.
How does Upstream Bio's Insider Ownership compare to RCKT and ABEO?
Upstream Bio's Insider Ownership of 0.32 % 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 Insider Ownership for a Biotechnology company?
A good Insider Ownership depends on the Biotechnology industry context. However, Insider 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 Insider Ownership mean?
A high Insider Ownership can signal that a stock is expensive relative to its fundamentals. Insider ownership equals the percent of shares owned by company insiders relative to total shares. View historical data on Upstream Bio and its competitors. Upstream Bio's current Insider Ownership is 0.32 %. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Upstream Bio stock overvalued right now?
Upstream Bio (UPB) has a current Insider Ownership of 0.32 %. The current Insider Ownership is 0.32 %. Upstream Bio's overall GF Score™ is 13/100 with 3 warning signs to review. Investors should evaluate multiple metrics — including profitability, growth, and financial strength — before making a decision.
How is Insider Ownership calculated?
Insider Ownership is calculated from a company's financial statements. For Upstream Bio (UPB), the current Insider Ownership is 0.32 % as of Aug. 18, 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.

Upstream Bio Business Description

Address 890 Winter Street, Suite 200, Waltham, MA, USA, 02451
Upstream Bio Inc is a clinical-stage biotechnology company developing treatments for inflammatory diseases, with an initial focus on severe respiratory disorders. It is developing verekitug, the known antagonist currently in clinical development that targets the receptor for Thymic Stromal Lymphopoietin (TSLP), a cytokine that is a clinically validated driver of inflammatory response positioned upstream of multiple signaling cascades that affect a variety of immune-mediated diseases. Verekitug has advanced into three separate world-wide, placebo-controlled, randomized Phase 2 clinical trials, two completed in chronic rhinosinusitis with nasal polyps (CRSwNP) and severe asthma, and one ongoing in chronic obstructive pulmonary disease (COPD).
13GF Score

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$6.90
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