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IlluminaILMN -3.38%72 3-Year Share Buyback Ratio is 1.10 as of Jun. 2026. GuruFocus rates ILMN with a GF Score™ of 72/100 and a GF Value™ of $131.86 (Significantly Overvalued). The stock has 7 warning signs investors should review. Among 173 Medical Diagnostics & Research companies, Illumina ranks better than 87.28% on this metric.
Shares Outstanding (EOP) are shares that have been authorized, issued, and purchased by investors and are held by them.
3-Year Share Buyback Ratio measures the average annual proportion of a company's outstanding shares repurchased over the past three years. It is calculated as the annualized percentage change in shares outstanding from three 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. Illumina's current 3-Year Share Buyback Ratio was 1.10%.
The historical rank and industry rank for Illumina's 3-Year Share Buyback Ratio or its related term are showing as below:
ILMN'
s 3-Year Share Buyback Ratio Range Over the Past 10 Years
Min: -13.6 Med: -2.3 Max: 1.1
Current: 1.1
During the past 13 years, Illumina's highest 3-Year Share Buyback Ratio was 1.10%. The lowest was -13.60%. And the median was -2.30%.
ILMN's 3-Year Share Buyback Ratio is ranked better than 87.28% of 173
companies
in the Medical Diagnostics & Research industry
Industry Median: -2.4
vs ILMN: 1.10
Illumina (NAS:ILMN) 3-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.
Illumina 3-Year Share Buyback Ratio Related Terms
ILMN vs MTD, DGX, LH: 3-Year Share Buyback Ratio Comparison
For the Diagnostics & Research subindustry, Illumina's 3-Year Share Buyback Ratio, along with its competitors' market caps and 3-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.
Illumina 3-Year Share Buyback Ratio vs Medical Diagnostics & Research Industry
For the Medical Diagnostics & Research industry and Healthcare sector, Illumina's 3-Year Share Buyback Ratio distribution charts can be found below:
* The bar in red indicates where Illumina's 3-Year Share Buyback Ratio falls into.
This is the annualized percentage change in shares outstanding from three years ago to the current year. The annualized percentage change is calculated with expontential compound based on the latest four 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 3-Year Share Buyback Ratio of 1.10 mean?
Illumina (ILMN) has a 3-Year Share Buyback Ratio of 1.10 as of Jun. 2026. The 3-Year Share Buyback Ratio measures the average annual proportion of a company's outstanding shares repurchased over the past three years. It is calculated as the annualized percentage change in shares outstanding from three years ago to the current year. View historical data for Illumina and its competitors. According to the industry distribution chart, Illumina ranks #22 out of 173 companies in the Medical Diagnostics & Research industry, placing it in the top 12.7%.
Is Illumina's 3-Year Share Buyback Ratio too high?
Illumina's current 3-Year Share Buyback Ratio is 1.10. Based on the distribution chart, Illumina ranks #22 out of 173 companies in the Medical Diagnostics & Research industry, which is in the top quartile — a strong position relative to peers. Overall, Illumina has a GF Score™ of 72/100 and is considered Significantly Overvalued, reflecting its overall financial health beyond just this single metric.
How does Illumina's 3-Year Share Buyback Ratio compare to MTD and DGX?
According to the Medical Diagnostics & Research industry distribution chart, Illumina ranks #22 out of 173 companies for 3-Year Share Buyback Ratio. This places Illumina in the top 13% of its industry — outperforming the majority of peers. See the competitive comparison table and distribution chart on this page for a detailed peer-by-peer breakdown.
What is a good 3-Year Share Buyback Ratio for a Medical Diagnostics & Research company?
A good 3-Year Share Buyback Ratio depends on the Medical Diagnostics & Research industry context. However, 3-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 3-Year Share Buyback Ratio mean?
A high 3-Year Share Buyback Ratio can signal that a stock is expensive relative to its fundamentals. The 3-Year Share Buyback Ratio measures the average annual proportion of a company's outstanding shares repurchased over the past three years. It is calculated as the annualized percentage change in shares outstanding from three years ago to the current year. View historical data for Illumina and its competitors. Illumina's current 3-Year Share Buyback Ratio is 1.10. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Illumina stock overvalued right now?
Based on GuruFocus' analysis, Illumina (ILMN) is currently considered Significantly Overvalued. The stock's GF Value™ is $131.86, compared to a current price of $198.16 — trading 50.3% above its estimated fair value. The current 3-Year Share Buyback Ratio is 1.10. Illumina's overall GF Score™ is 72/100 with 7 warning signs to review. Investors should evaluate multiple metrics — including profitability, growth, and financial strength — before making a decision.
How is 3-Year Share Buyback Ratio calculated?
3-Year Share Buyback Ratio is calculated from a company's financial statements. For Illumina (ILMN), the current 3-Year Share Buyback Ratio is 1.10 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 Illumina (ILMN) Overvalued in 2026?
Based on GuruFocus' analysis, Illumina stock appears to be overvalued.
The current stock price of $198.16 is trading 50.3% above its estimated GF Value™ of $131.86.
GuruFocus considers Illumina to be Significantly Overvalued.
Key valuation signals for ILMN:
3-Year Share Buyback Ratio: 1.10
GF Value™: $131.86 vs. price of $198.16 (50.3% above fair value)
No single metric tells the full story. See the ILMN stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.
Illumina provides tools and services to analyze genetic material with life science and clinical lab applications. The company generates over 90% of its revenue from sequencing instruments, consumables, and services. Illumina's high-throughput technology enables whole genome sequencing in humans and other large organisms. Its lower throughput tools enable applications that require smaller data outputs, such as viral and cancer tumor screening. Illumina also sells microarrays (9% of 2024 sales) that enable lower-cost, focused genetic screening with primarily consumer and agricultural applications.
72GF Score
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3-Year Share Buyback Ratio is just one metric. See GF Value™, 30-year financials, guru trades, warning signs, and more.
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