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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. Phathom Pharmaceuticals's current 3-Year Share Buyback Ratio was -19.90%.
The historical rank and industry rank for Phathom Pharmaceuticals's 3-Year Share Buyback Ratio or its related term are showing as below:
PHAT'
s 3-Year Share Buyback Ratio Range Over the Past 10 Years
Min: -31 Med: -19.9 Max: -10.1
Current: -19.9
During the past 8 years, Phathom Pharmaceuticals's highest 3-Year Share Buyback Ratio was -10.10%. The lowest was -31.00%. And the median was -19.90%.
PHAT's 3-Year Share Buyback Ratio is ranked worse than 62.94% of 1190
companies
in the Biotechnology industry
Industry Median: -11.75
vs PHAT: -19.90
Phathom Pharmaceuticals (NAS:PHAT) 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.
Phathom Pharmaceuticals 3-Year Share Buyback Ratio Related Terms
PHAT vs GERN, KURA, ODTX: 3-Year Share Buyback Ratio Comparison
For the Biotechnology subindustry, Phathom Pharmaceuticals'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.
Phathom Pharmaceuticals 3-Year Share Buyback Ratio vs Biotechnology Industry
For the Biotechnology industry and Healthcare sector, Phathom Pharmaceuticals's 3-Year Share Buyback Ratio distribution charts can be found below:
* The bar in red indicates where Phathom Pharmaceuticals's 3-Year Share Buyback Ratio falls into.
Phathom Pharmaceuticals 3-Year Share Buyback Ratio Calculation
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 -19.90 mean?
Phathom Pharmaceuticals (PHAT) has a 3-Year Share Buyback Ratio of -19.90 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 Phathom Pharmaceuticals and its competitors. According to the industry distribution chart, Phathom Pharmaceuticals ranks #749 out of 1190 companies in the Biotechnology industry, placing it in the top 62.9%.
Is Phathom Pharmaceuticals' 3-Year Share Buyback Ratio too high?
Phathom Pharmaceuticals' current 3-Year Share Buyback Ratio is -19.90. Based on the distribution chart, Phathom Pharmaceuticals ranks #749 out of 1190 companies in the Biotechnology industry, which is below the industry midpoint. Overall, Phathom Pharmaceuticals has a GF Score™ of 38/100 and is considered Possible Value Trap, reflecting its overall financial health beyond just this single metric.
How does Phathom Pharmaceuticals' 3-Year Share Buyback Ratio compare to GERN and KURA?
According to the Biotechnology industry distribution chart, Phathom Pharmaceuticals ranks #749 out of 1190 companies for 3-Year Share Buyback Ratio. This places Phathom Pharmaceuticals 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 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 Phathom Pharmaceuticals and its competitors. Phathom Pharmaceuticals's current 3-Year Share Buyback Ratio is -19.90. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Phathom Pharmaceuticals stock overvalued right now?
Based on GuruFocus' analysis, Phathom Pharmaceuticals (PHAT) is currently considered Possible Value Trap. The stock's GF Value™ is $25.07, compared to a current price of $8.88 — trading 64.6% below its estimated fair value. The current 3-Year Share Buyback Ratio is -19.90. Phathom Pharmaceuticals' overall GF Score™ is 38/100 with 2 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 Phathom Pharmaceuticals (PHAT), the current 3-Year Share Buyback Ratio is -19.90 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 Phathom Pharmaceuticals (PHAT) Overvalued in 2026?
Based on GuruFocus' analysis, Phathom Pharmaceuticals stock appears to be undervalued.
The current stock price of $8.88 is trading 64.6% below its estimated GF Value™ of $25.07.
GuruFocus considers Phathom Pharmaceuticals to be Possible Value Trap.
Key valuation signals for PHAT:
3-Year Share Buyback Ratio: -19.90
GF Value™: $25.07 vs. price of $8.88 (64.6% below fair value)
No single metric tells the full story. See the PHAT stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.
Phathom Pharmaceuticals Inc operates as a clinical-stage biopharmaceutical company. The firm is focused on developing and commercializing novel treatments for gastrointestinal, or GI, diseases. Its product comprises vonoprazan, an oral small-molecule potassium competitive acid blocker medicine that blocks acid secretion in the stomach. Vonoprazan shows rapid, potent, and durable anti-secretory effects and has demonstrated clinical benefits in the treatment of gastroesophageal reflux disease, and in combination with antibiotics for the treatment of Helicobacter pylori infection.
38GF Score
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