CLYYF (Celyad Oncology) Shares Buyback Ratio %: -8.05 (As of Aug. 12, 2026)

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CLYYF Celyad Oncology SA CLYYF
28 GF Score
Price $0.28
Valuation Significantly Overvalued
! 6 Warning Signs
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What is Celyad Oncology Shares Buyback Ratio %?

Celyad Oncology CLYYF +40.00% 28 Shares Buyback Ratio % is -8.05 as of Aug. 12, 2026. GuruFocus rates CLYYF with a GF Score™ of 28/100 (Significantly Overvalued). The stock has 6 warning signs investors should review.

Shares Outstanding (EOP) are shares that have been authorized, issued, and purchased by investors and are held by them.

GuruFocus calculates shares buyback ratio using previous shares outstanding minus the current shares outstanding, and then divides by previous shares outstanding. Celyad Oncology's current shares buyback ratio was -8.05%.

Celyad Oncology Shares Buyback Ratio % Related Terms

Celyad Oncology Shares Buyback Ratio % Historical Data

* Premium members only.

The historical data trend for Celyad Oncology's Shares Buyback Ratio % 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.

Celyad Oncology Shares Buyback Ratio % Chart

Celyad Oncology Annual Data
Trend Dec16 Dec17 Dec18 Dec19 Dec20 Dec21 Dec22 Dec23 Dec24 Dec25
Shares Buyback Ratio %
Get a 7-Day Free Trial Premium Member Only Premium Member Only -62.06 0.00 -83.36 0.00 -8.05

Celyad Oncology Semi-Annual Data
Jun16 Dec16 Jun17 Dec17 Jun18 Dec18 Jun19 Dec19 Jun20 Dec20 Jun21 Dec21 Jun22 Dec22 Jun23 Dec23 Jun24 Dec24 Jun25 Dec25
Shares Buyback Ratio % Get a 7-Day Free Trial Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only -83.36 0.00 0.00 0.00 -8.05
CLYYF
28GF Score
Celyad Oncology SA CLYYF
Shares Buyback Ratio % is just one metric. See GF Score™, valuation, warning signs, and more.
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Celyad Oncology Shares Buyback Ratio % Calculation

Celyad Oncology's Shares Buyback Ratio for the fiscal year that ended in Dec. 2025 is calculated as

Shares Buyback Ratio=(Shares Outstanding (EOP) (A: Dec. 2024 ) - Shares Outstanding (EOP) (A: Dec. 2025 )) / Shares Outstanding (EOP) (A: Dec. 2024 )
=(41.429 - 44.762) / 41.429
=-8.05%

Celyad Oncology's Shares Buyback Ratio for the quarter that ended in Dec. 2025 is calculated as

Shares Buyback Ratio=(Shares Outstanding (EOP) (A: Jun. 2025 ) - Shares Outstanding (EOP) (A: Dec. 2025 )) / Shares Outstanding (EOP) (A: Jun. 2025 )
=(41.429 - 44.762) / 41.429
=-8.05%

* 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.

Frequently Asked Questions Learn more about Shares Buyback Ratio % →
What does a Shares Buyback Ratio % of -8.05 mean?
Celyad Oncology (CLYYF) has a Shares Buyback Ratio % of -8.05 as of Aug. 12, 2026. Share buyback ratio is the percent change of a company's shares outstanding from two periods. View historical data on Celyad Oncology and its competitors.
Is Celyad Oncology's Shares Buyback Ratio % too high?
Celyad Oncology's current Shares Buyback Ratio % is -8.05. Overall, Celyad Oncology has a GF Score™ of 28/100 and is considered Significantly Overvalued, reflecting its overall financial health beyond just this single metric.
How does Celyad Oncology's Shares Buyback Ratio % compare to VRTX and REGN?
Celyad Oncology's Shares Buyback Ratio % of -8.05 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 Shares Buyback Ratio % for a Biotechnology company?
A good Shares Buyback Ratio % depends on the Biotechnology industry context. However, Shares Buyback Ratio % 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 Shares Buyback Ratio % mean?
A high Shares Buyback Ratio % can signal that a stock is expensive relative to its fundamentals. Share buyback ratio is the percent change of a company's shares outstanding from two periods. View historical data on Celyad Oncology and its competitors. Celyad Oncology's current Shares Buyback Ratio % is -8.05. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Celyad Oncology stock overvalued right now?
Based on GuruFocus' analysis, Celyad Oncology (CLYYF) is currently considered Significantly Overvalued. The current Shares Buyback Ratio % is -8.05. Celyad Oncology's overall GF Score™ is 28/100 with 6 warning signs to review. Investors should evaluate multiple metrics — including profitability, growth, and financial strength — before making a decision.
How is Shares Buyback Ratio % calculated?
Shares Buyback Ratio % is calculated from a company's financial statements. For Celyad Oncology (CLYYF), the current Shares Buyback Ratio % is -8.05 as of Aug. 12, 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.

Celyad Oncology Business Description

Address Rue Edouard Belin 2, Axis Business Park, Brabant Wallon, Mont-Saint-Guibert, BEL, 1435
Celyad Oncology SA is a biopharmaceutical company focused on the discovery and development of technologies for chimeric antigen receptor T-cell (CAR T) therapies. The company focuses on solid tumors and hematological malignancies. The firm has CYAD-01 and CYAD-02 programs in the pipeline. The company owns trademarks and service marks, including CELYAD, C-CATH, C_CURE, CAR-T Cell, THINK, CYAD01 - Deplethink, CYAD02 - Cycle1, CwalityCAR, CYAD-101, and new engagers. The firm has Cardiology and Immuno-oncology operating segments. It generates the majority of its revenue from the Cardiology segment.
28GF Score

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Shares Buyback Ratio % is just one metric. See GF Value™, 30-year financials, guru trades, warning signs, and more.

$0.28
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