BioNTech SE (BSP:B1NT34) Shares Buyback Ratio %: -4.49 (As of Sep. 10, 2026)

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BSP:B1NT34 BioNTech SE BSP:B1NT34
45 GF Score
Price R$31.20
GF Value R$25.36
Valuation Modestly Overvalued
! 5 Warning Signs
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What is BioNTech SE Shares Buyback Ratio %?

BioNTech SE BSP:B1NT34 -1.02% 45 Shares Buyback Ratio % is -4.49 as of Sep. 10, 2026. GuruFocus rates BSP:B1NT34 with a GF Score™ of 45/100 and a GF Value™ of R$25.36 (Modestly Overvalued). The stock has 5 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. BioNTech SE's current shares buyback ratio was -4.49%.

BioNTech SE Shares Buyback Ratio % Related Terms

BioNTech SE Shares Buyback Ratio % Historical Data

* Premium members only.

The historical data trend for BioNTech SE'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.

BioNTech SE Shares Buyback Ratio % Chart

BioNTech SE 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 -0.41 -0.29 2.26 -0.94 -4.73

BioNTech SE Quarterly Data
Sep21 Dec21 Mar22 Jun22 Sep22 Dec22 Mar23 Jun23 Sep23 Dec23 Mar24 Jun24 Sep24 Dec24 Mar25 Jun25 Sep25 Dec25 Mar26 Jun26
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 0.00 -0.02 -4.52 -0.62 0.66
BSP:B1NT34
45GF Score
BioNTech SE BSP:B1NT34
Shares Buyback Ratio % is just one metric. See GF Score™, valuation, warning signs, and more.
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BioNTech SE Shares Buyback Ratio % Calculation

BioNTech SE'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 )
=(3839.533 - 4021.205) / 3839.533
=-4.73%

BioNTech SE's Shares Buyback Ratio for the quarter that ended in Jun. 2026 is calculated as

Shares Buyback Ratio=(Shares Outstanding (EOP) (A: Mar. 2026 ) - Shares Outstanding (EOP) (A: Jun. 2026 )) / Shares Outstanding (EOP) (A: Mar. 2026 )
=(4046.148 - 4019.270) / 4046.148
=0.66%

* 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 -4.49 mean?
BioNTech SE (BSP:B1NT34) has a Shares Buyback Ratio % of -4.49 as of Sep. 10, 2026. Share buyback ratio is the percent change of a company's shares outstanding from two periods. View historical data on BioNTech SE and its competitors.
Is BioNTech SE's Shares Buyback Ratio % too high?
BioNTech SE's current Shares Buyback Ratio % is -4.49. Overall, BioNTech SE has a GF Score™ of 45/100 and is considered Modestly Overvalued, reflecting its overall financial health beyond just this single metric.
How does BioNTech SE's Shares Buyback Ratio % compare to INSM and INCY?
BioNTech SE's Shares Buyback Ratio % of -4.49 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 BioNTech SE and its competitors. BioNTech SE's current Shares Buyback Ratio % is -4.49. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is BioNTech SE stock overvalued right now?
Based on GuruFocus' analysis, BioNTech SE (BSP:B1NT34) is currently considered Modestly Overvalued. The stock's GF Value™ is R$25.36, compared to a current price of R$31.20 — trading 23% above its estimated fair value. The current Shares Buyback Ratio % is -4.49. BioNTech SE's overall GF Score™ is 45/100 with 5 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 BioNTech SE (BSP:B1NT34), the current Shares Buyback Ratio % is -4.49 as of Sep. 10, 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.

Is BioNTech SE (BSP:B1NT34) Overvalued in 2026?

Based on GuruFocus' analysis, BioNTech SE stock appears to be overvalued. The current stock price of R$31.20 is trading 23% above its estimated GF Value™ of R$25.36. GuruFocus considers BioNTech SE to be Modestly Overvalued.

Key valuation signals for BSP:B1NT34:

  • Shares Buyback Ratio %: -4.49
  • GF Value™: R$25.36 vs. price of R$31.20 (23% above fair value)
  • GF Score™: 45/100 with 5 warning signs

No single metric tells the full story. See the BSP:B1NT34 stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.

BioNTech SE Business Description

Address An der Goldgrube 12, Mainz, RP, DEU, D-55131
BioNTech is a Germany-based biotechnology company that focuses on developing cancer therapeutics, including individualized immunotherapy, as well as vaccines for infectious diseases, including covid. The company's oncology pipeline contains several classes of drugs, including mRNA-based drugs to encode antigens and neoantigens; monospecific and bispecific antibodies; and antibody-drug conjugates, or ADCs. Comirnaty, its Pfizer-partnered covid vaccine, is its first commercialized product.
45GF Score

Get the complete analysis for BSP:B1NT34

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

R$31.20
Price
R$25.36
GF Value