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.
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.
Shares Outstanding (EOP) are shares that have been authorized, issued, and purchased by investors and are held by them.
10-Year Share Buyback Ratio measures the average annual proportion of a company's outstanding shares repurchased over the past ten years. It is calculated as the annualized percentage change in shares outstanding from ten years ago to the current year. A positive ratio may indicate share buybacks over the period, while a zero or negative ratio may reflect no repurchases or potential share issuance. Enphase Energy's current 10-Year Share Buyback Ratio was -9.70%.
XSWX:ENPH's 10-Year Share Buyback Ratio is ranked worse than 86.41% of 633
companies
in the Semiconductors industry
Industry Median: -2.5
vs XSWX:ENPH: -9.70
Enphase Energy (XSWX:ENPH) 10-Year Share Buyback Ratio Explanation
A negative number means the company might be issuing new shares. A positive number indicates that the company is buying back shares.
Be Aware
Investors usually like share buybacks. But as pointed by Warren Buffett, only if a company buys back shares at the prices below the stock's intrinsic value, it rewards remaining shareholders. If a company buys its overvalued stocks back, it destroys shareholder value.
Enphase Energy 10-Year Share Buyback Ratio Related Terms
XSWX:ENPH vs SEDG, RUN, SHLS: 10-Year Share Buyback Ratio Comparison
For the Solar subindustry, Enphase Energy's 10-Year Share Buyback Ratio, along with its competitors' market caps and 10-Year Share Buyback Ratio data, can be viewed below:
* Competitive companies are chosen from companies within the same industry, with headquarter located in same country, with closest market capitalization; x-axis shows the market cap, and y-axis shows the term value; the bigger the dot, the larger the market cap. Note that "N/A" values will not show up in the chart.
Enphase Energy 10-Year Share Buyback Ratio vs Semiconductors Industry
For the Semiconductors industry and Technology sector, Enphase Energy's 10-Year Share Buyback Ratio distribution charts can be found below:
* The bar in red indicates where Enphase Energy's 10-Year Share Buyback Ratio falls into.
Enphase Energy 10-Year Share Buyback Ratio Calculation
This is the annualized percentage change in shares outstanding from ten years ago to the current year. The annualized percentage change is calculated with least-square regression based on the eleven years of annual data on Shares Outstanding (EOP).
Please click Growth Rate Calculation Example (GuruFocus) to see how GuruFocus calculates Wal-Mart Stores Inc (WMT)'s revenue growth rate. You can apply the same method to get the average dividends per share growth rate.
What does a 10-Year Share Buyback Ratio of -9.70 mean?
Enphase Energy (XSWX:ENPH) has a 10-Year Share Buyback Ratio of -9.70 as of Jun. 2026. The 10-Year Share Buyback Ratio measures the average annual proportion of a company's outstanding shares repurchased over the past ten years. It is calculated as the annualized percentage change in shares outstanding from ten years ago to the current year. View historical data for Enphase Energy and its competitors. According to the industry distribution chart, Enphase Energy ranks #547 out of 633 companies in the Semiconductors industry, placing it in the top 86.4%.
Is Enphase Energy's 10-Year Share Buyback Ratio too high?
Enphase Energy's current 10-Year Share Buyback Ratio is -9.70. Based on the distribution chart, Enphase Energy ranks #547 out of 633 companies in the Semiconductors industry, which is in the bottom quartile relative to peers. Overall, Enphase Energy has a GF Score™ of 74/100, reflecting its overall financial health beyond just this single metric.
How does Enphase Energy's 10-Year Share Buyback Ratio compare to SEDG and RUN?
According to the Semiconductors industry distribution chart, Enphase Energy ranks #547 out of 633 companies for 10-Year Share Buyback Ratio. This places Enphase Energy in the lower half of its industry. See the competitive comparison table and distribution chart on this page for a detailed peer-by-peer breakdown.
What is a good 10-Year Share Buyback Ratio for a Semiconductors company?
A good 10-Year Share Buyback Ratio depends on the Semiconductors industry context. However, 10-Year Share 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 10-Year Share Buyback Ratio mean?
A high 10-Year Share Buyback Ratio can signal that a stock is expensive relative to its fundamentals. The 10-Year Share Buyback Ratio measures the average annual proportion of a company's outstanding shares repurchased over the past ten years. It is calculated as the annualized percentage change in shares outstanding from ten years ago to the current year. View historical data for Enphase Energy and its competitors. Enphase Energy's current 10-Year Share Buyback Ratio is -9.70. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Enphase Energy stock overvalued right now?
Enphase Energy (XSWX:ENPH) has a current 10-Year Share Buyback Ratio of -9.70. The stock's GF Value™ is CHF42.71, compared to a current price of CHF31.16 — trading 27% below its estimated fair value. The current 10-Year Share Buyback Ratio is -9.70. Enphase Energy's overall GF Score™ is 74/100 with 6 warning signs to review. Investors should evaluate multiple metrics — including profitability, growth, and financial strength — before making a decision.
How is 10-Year Share Buyback Ratio calculated?
10-Year Share Buyback Ratio is calculated from a company's financial statements. For Enphase Energy (XSWX:ENPH), the current 10-Year Share Buyback Ratio is -9.70 as of Jun. 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 Enphase Energy (XSWX:ENPH) Overvalued in 2026?
Based on GuruFocus' analysis, Enphase Energy stock appears to be undervalued.
The current stock price of CHF31.16 is trading 27% below its estimated GF Value™ of CHF42.71.
Key valuation signals for XSWX:ENPH:
10-Year Share Buyback Ratio: -9.70
GF Value™: CHF42.71 vs. price of CHF31.16 (27% below fair value)
No single metric tells the full story. See the XSWX:ENPH stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.
Enphase Energy is a global energy technology company. It delivers smart, easy-to-use solutions that manage solar generation, storage, and communication on one platform. The company's microinverter technology primarily serves the rooftop solar market and produces a fully integrated solar-plus-storage solution. Enphase derives a majority of revenue from the United States.
74GF Score
Get the complete analysis for XSWX:ENPH
10-Year Share Buyback Ratio is just one metric. See GF Value™, 30-year financials, guru trades, warning signs, and more.
Quick Browse
Personalize
Premium Gurus 
Create New Portfolio
XSWX:ENPH has been successfully added to your 
