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.
CSLCSLLY -0.19%73 3-Year Share Buyback Ratio is -0.20 as of Dec. 2025. GuruFocus rates CSLLY with a GF Score™ of 73/100 and a GF Value™ of $50.17 (Significantly Undervalued). The stock has 7 warning signs investors should review. Among 1,196 Biotechnology companies, CSL ranks better than 89.05% 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. CSL's current 3-Year Share Buyback Ratio was -0.20%.
The historical rank and industry rank for CSL's 3-Year Share Buyback Ratio or its related term are showing as below:
CSLLY'
s 3-Year Share Buyback Ratio Range Over the Past 10 Years
Min: -18 Med: -0.25 Max: 5.4
Current: -0.2
During the past 13 years, CSL's highest 3-Year Share Buyback Ratio was 5.40%. The lowest was -18.00%. And the median was -0.25%.
CSLLY's 3-Year Share Buyback Ratio is ranked better than 89.05% of 1196
companies
in the Biotechnology industry
Industry Median: -11.8
vs CSLLY: -0.20
CSL (OTCPK:CSLLY) 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.
CSL 3-Year Share Buyback Ratio Related Terms
CSLLY vs VRTX, REGN, ALNY: 3-Year Share Buyback Ratio Comparison
For the Biotechnology subindustry, CSL'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.
CSL 3-Year Share Buyback Ratio vs Biotechnology Industry
For the Biotechnology industry and Healthcare sector, CSL's 3-Year Share Buyback Ratio distribution charts can be found below:
* The bar in red indicates where CSL'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 -0.20 mean?
CSL (CSLLY) has a 3-Year Share Buyback Ratio of -0.20 as of Dec. 2025. 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 CSL and its competitors. According to the industry distribution chart, CSL ranks #131 out of 1196 companies in the Biotechnology industry, placing it in the top 11%.
Is CSL's 3-Year Share Buyback Ratio too high?
CSL's current 3-Year Share Buyback Ratio is -0.20. Based on the distribution chart, CSL ranks #131 out of 1196 companies in the Biotechnology industry, which is in the top quartile — a strong position relative to peers. Overall, CSL has a GF Score™ of 73/100 and is considered Significantly Undervalued, reflecting its overall financial health beyond just this single metric.
How does CSL's 3-Year Share Buyback Ratio compare to VRTX and REGN?
According to the Biotechnology industry distribution chart, CSL ranks #131 out of 1196 companies for 3-Year Share Buyback Ratio. This places CSL in the top 11% 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 Biotechnology company?
A good 3-Year Share Buyback Ratio depends on the Biotechnology 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 CSL and its competitors. CSL's current 3-Year Share Buyback Ratio is -0.20. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is CSL stock overvalued right now?
Based on GuruFocus' analysis, CSL (CSLLY) is currently considered Significantly Undervalued. The stock's GF Value™ is $50.17, compared to a current price of $21.43 — trading 57.3% below its estimated fair value. The current 3-Year Share Buyback Ratio is -0.20. CSL's overall GF Score™ is 73/100 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 CSL (CSLLY), the current 3-Year Share Buyback Ratio is -0.20 as of Dec. 2025. 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 CSL (CSLLY) Overvalued in 2026?
Based on GuruFocus' analysis, CSL stock appears to be undervalued.
The current stock price of $21.43 is trading 57.3% below its estimated GF Value™ of $50.17.
GuruFocus considers CSL to be Significantly Undervalued.
Key valuation signals for CSLLY:
3-Year Share Buyback Ratio: -0.20
GF Value™: $50.17 vs. price of $21.43 (57.3% below fair value)
No single metric tells the full story. See the CSLLY stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.
CSL is one of the largest global biotech companies and has three main segments. CSL Behring either uses plasma-derived proteins or recombinants to treat conditions including immunodeficiencies, bleeding disorders, and neurological indications. CSL Seqirus is the world's second-largest influenza vaccination business and was acquired in fiscal 2016. CSL Vifor is an iron deficiency and nephrology business and was acquired in fiscal 2023. CSL has a strong R&D track record, and the product portfolio and pipeline include nonplasma products as the firm continues to broaden its scope. Originally formed in Australia as a government-owned entity, CSL now earns roughly half its revenue in North America and a quarter in Europe.
73GF Score
Get the complete analysis for CSLLY
3-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
CSLLY has been successfully added to your 
