ACLS (Axcelis Technologies) Shares Buyback Ratio %: 4.34 (As of Jul. 17, 2026)

Author: Vera Yuan Vera Yuan
Vera Yuan
Vera Yuan
Director of Data and Quant Analytics at GuruFocus
Focused on building reliable datasets, financial models, and research tools for value-minded investors. Committed to turning complex data into practical guidance for value-investing and long-term wealth.
Reviewed by: Charlie Tian Charlie Tian
Charlie Tian
Charlie Tian
Founder & CEO of GuruFocus
Dr. Charlie Tian is the founder and CEO of GuruFocus.com, a leading global investment research platform established in 2004. With a Ph.D. in physics, Dr. Tian transitioned from science to finance, applying a data-driven, disciplined approach to value investing.

ACLS Axcelis Technologies Inc ACLS
89 GF Score
Price $139.34
GF Value $87.56
Valuation Significantly Overvalued
! 4 Warning Signs
View Full Analysis

What is Axcelis Technologies Shares Buyback Ratio %?

Axcelis Technologies ACLS -3.90% 89 Shares Buyback Ratio % is 4.34 as of Jul. 17, 2026. GuruFocus rates ACLS with a GF Score™ of 89/100 and a GF Value™ of $87.56 (Significantly Overvalued). The stock has 4 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. Axcelis Technologies's current shares buyback ratio was 4.34%.

Axcelis Technologies Shares Buyback Ratio % Related Terms

Axcelis Technologies Shares Buyback Ratio % Historical Data

* Premium members only.

The historical data trend for Axcelis Technologies'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.

Axcelis Technologies Shares Buyback Ratio % Chart

Axcelis Technologies 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 1.17 1.40 0.27 0.98 5.09

Axcelis Technologies Quarterly Data
Jun21 Sep21 Dec21 Mar22 Jun22 Sep22 Dec22 Mar23 Jun23 Sep23 Dec23 Mar24 Jun24 Sep24 Dec24 Mar25 Jun25 Sep25 Dec25 Mar26
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 0.73 2.21 1.34 0.91 -0.05
ACLS
89GF Score
Axcelis Technologies Inc ACLS
Shares Buyback Ratio % is just one metric. See GF Score™, valuation, warning signs, and more.
View Full Analysis

Axcelis Technologies Shares Buyback Ratio % Calculation

Axcelis Technologies'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 )
=(32.365 - 30.717) / 32.365
=5.09%

Axcelis Technologies's Shares Buyback Ratio for the quarter that ended in Mar. 2026 is calculated as

Shares Buyback Ratio=(Shares Outstanding (EOP) (A: Dec. 2025 ) - Shares Outstanding (EOP) (A: Mar. 2026 )) / Shares Outstanding (EOP) (A: Dec. 2025 )
=(30.717 - 30.733) / 30.717
=-0.05%

* 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 4.34 mean?
Axcelis Technologies (ACLS) has a Shares Buyback Ratio % of 4.34 as of Jul. 17, 2026. Share buyback ratio is the percent change of a company's shares outstanding from two periods. View historical data on Axcelis Technologies and its competitors.
Is Axcelis Technologies' Shares Buyback Ratio % too high?
Axcelis Technologies' current Shares Buyback Ratio % is 4.34. Overall, Axcelis Technologies has a GF Score™ of 89/100 and is considered Significantly Overvalued, reflecting its overall financial health beyond just this single metric.
How does Axcelis Technologies' Shares Buyback Ratio % compare to UCTT and AXTI?
Axcelis Technologies' Shares Buyback Ratio % of 4.34 can be compared against companies in the Semiconductors 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 Semiconductors company?
A good Shares Buyback Ratio % depends on the Semiconductors 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 Axcelis Technologies and its competitors. Axcelis Technologies's current Shares Buyback Ratio % is 4.34. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Axcelis Technologies stock overvalued right now?
Based on GuruFocus' analysis, Axcelis Technologies (ACLS) is currently considered Significantly Overvalued. The stock's GF Value™ is $87.56, compared to a current price of $139.34 — trading 59.1% above its estimated fair value. The current Shares Buyback Ratio % is 4.34. Axcelis Technologies' overall GF Score™ is 89/100 with 4 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 Axcelis Technologies (ACLS), the current Shares Buyback Ratio % is 4.34 as of Jul. 17, 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 Axcelis Technologies (ACLS) Overvalued in 2026?

Based on GuruFocus' analysis, Axcelis Technologies stock appears to be overvalued. The current stock price of $139.34 is trading 59.1% above its estimated GF Value™ of $87.56. GuruFocus considers Axcelis Technologies to be Significantly Overvalued.

Key valuation signals for ACLS:

  • Shares Buyback Ratio %: 4.34
  • GF Value™: $87.56 vs. price of $139.34 (59.1% above fair value)
  • GF Score™: 89/100 with 4 warning signs

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

Axcelis Technologies Business Description

Address 108 Cherry Hill Drive, Beverly, MA, USA, 01915
Axcelis Technologies Inc designs, manufactures, and services ion implantation and other processing equipment used in the fabrication of semiconductor chips. In addition to equipment, the company provides aftermarket lifecycle products and services, including used tools, spare parts, equipment upgrades, maintenance services, and customer training. Geographically, the group has a business presence in North America, Asia Pacific, and Europe, of which key revenue is derived from the Asia Pacific.
89GF Score

Get the complete analysis for ACLS

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

$139.34
Price
$87.56
GF Value