Atara BiotherapeuticsATRA -3.13%31 Piotroski F-Score is 2 as of Jun. 25, 2026, which is 33% below its 10-year median of 3.00. GuruFocus rates ATRA with a GF Score™ of 31/100 and a GF Value™ of $1.56 (Significantly Overvalued). The stock has 7 warning signs investors should review. Among 1,342 Biotechnology companies, Atara Biotherapeutics ranks worse than 73.25% on this metric.
Warning Sign:
Piotroski F-Score of 2 is low, which usually implies poor business operation.
The zones of discrimination were as such:
Good or high score = 7, 8, 9
Bad or low score = 0, 1, 2, 3
Atara Biotherapeutics has an F-score of 2. It is a bad or low score, which usually implies poor business operation.
The historical rank and industry rank for Atara Biotherapeutics's Piotroski F-Score or its related term are showing as below:
ATRA'
s Piotroski F-Score Range Over the Past 10 Years
Min: 1 Med: 3 Max: 6
Current: 2
During the past 13 years, the highest Piotroski F-Score of Atara Biotherapeutics was 6. The lowest was 1. And the median was 3.
The developer of the system is Joseph D. Piotroski is relatively unknown accounting professor who shuns publicity and rarely gives interviews.
He graduated from the University of Illinois with a B.S. in accounting in 1989, received an M.B.A. from Indiana University in 1994. Five years later, in 1999, after earning a Ph.D. in accounting from the University of Michigan, he became an associate professor of accounting at the University of Chicago.
He wanted to see if he can develop a system (using a simple nine-point scoring system) that can increase the returns of a strategy of investing in low price to book (referred to in the paper as high book to market) value companies.
What he found was something that exceeded his most optimistic expectations.
Buying only those companies that scored highest (8 or 9) on his nine-point scale, or F-Score as he called it, over the 20 year period from 1976 to 1996 led to an average out-performance over the market of 13.4%.
Even more impressive were the results of a strategy of investing in the highest F-Score companies (8 or 9) and shorting companies with the lowest F-Score (0 or 1).
Over the same period from 1976 to 1996 (20 years) this strategy led to an average yearly return of 23%, substantially outperforming the average S&P 500 index return of 15.83% over the same period.
Atara Biotherapeutics Piotroski F-Score Related Terms
Atara Biotherapeutics Piotroski F-Score Historical Data
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The historical data trend for Atara Biotherapeutics's Piotroski F-Score 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.
ATRA vs RNTX, IBIO, OSTX: Piotroski F-Score Comparison
For the Biotechnology subindustry, Atara Biotherapeutics's Piotroski F-Score, along with its competitors' market caps and Piotroski F-Score 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.
Atara Biotherapeutics Piotroski F-Score vs Biotechnology Industry
For the Biotechnology industry and Healthcare sector, Atara Biotherapeutics's Piotroski F-Score distribution charts can be found below:
* The bar in red indicates where Atara Biotherapeutics's Piotroski F-Score falls into.
* 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.
*Note: If the latest quarterly/semi-annual/annual total assets data is 0, then we will use previous quarterly/semi-annual/annual data for all the items in the balance sheet.
Profitability
Question 1. Return on Assets (ROA)
Net income before extraordinary items for the year divided by Total Assets at the beginning of the year.
Score 1 if positive, 0 if negative.
Atara Biotherapeutics's current Net Income (TTM) was -9.47.
==> Negative ==> Score 0.
Question 2. Cash Flow Return on Assets (CFROA)
Net cash flow from operating activities (operating cash flow) divided by Total Assets at the beginning of the year.
Score 1 if positive, 0 if negative.
Atara Biotherapeutics's current Cash Flow from Operations (TTM) was -25.88.
==> Negative ==> Score 0.
Question 3. Change in Return on Assets
Compare this year's return on assets (1) to last year's return on assets.
Atara Biotherapeutics's return on assets of this year was -0.15260002. Atara Biotherapeutics's return on assets of last year was -0.09463793.
==> Last year is higher ==> Score 0.
Question 4. Quality of Earnings (Accrual)
Compare Cash flow return on assets (2) to return on assets (1)
Atara Biotherapeutics's gearing of this year was 0.26798316. Atara Biotherapeutics's gearing of last year was 0.22391088.
==> Last year is lower than this year ==> Score 0.
Question 6. Change in Working Capital (Liquidity)
Compare this year's current ratio (current assets divided by current liabilities) to last year's current ratio.
Score 1 if this year's current ratio is higher, 0 if it's lower
Atara Biotherapeutics's current ratio of this year was 2.15642161. Atara Biotherapeutics's current ratio of last year was 0.5675687.
==> This year's current ratio is higher. ==> Score 1.
Question 7. Change in Shares in Issue
Compare the number of shares in issue this year, to the number in issue last year.
Score 0 if there is larger number of shares in issue this year, 1 otherwise.
Atara Biotherapeutics's number of shares in issue this year was 14.081. Atara Biotherapeutics's number of shares in issue last year was 10.851.
==> There is larger number of shares in issue this year. ==> Score 0.
Efficiency
Question 8. Change in Gross Margin
Compare this year's gross margin (Gross Profit divided by sales) to last year's.
Score 1 if this year's gross margin is higher, 0 if it's lower.
Atara Biotherapeutics's gross margin of this year was 0.96123428. Atara Biotherapeutics's gross margin of last year was 0.80242024.
==> This year's gross margin is higher. ==> Score 1.
Question 9. Change in asset turnover
Compare this year's asset turnover (total sales for the year divided by total assets at the beginning of the year) to last year's asset turnover ratio.
Score 1 if this year's asset turnover ratio is higher, 0 if it's lower
Atara Biotherapeutics's asset turnover of this year was 0.37298108. Atara Biotherapeutics's asset turnover of last year was 1.20850477.
==> Last year's asset turnover is higher ==> Score 0.
Evaluation
Piotroski F-Score
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Good or high score = 7, 8, 9
Bad or low score = 0, 1, 2, 3
Atara Biotherapeutics has an F-score of 2. It is a bad or low score, which usually implies poor business operation.
Atara Biotherapeutics (ATRA) has a Piotroski F-Score of 2 as of Jun. 25, 2026. The Piotroski F-score grades a company's business operating strength from 0-9. View historical data on Atara Biotherapeutics and its competitors. This is 33% below median its historical median of 3.00. Over the past decade, Atara Biotherapeutics' Piotroski F-Score has ranged from 1.00 to 6.00. According to the industry distribution chart, Atara Biotherapeutics ranks #983 out of 1342 companies in the Biotechnology industry, placing it in the top 73.2%.
Is Atara Biotherapeutics' Piotroski F-Score too high?
Atara Biotherapeutics' current Piotroski F-Score of 2 is 33% below median its 10-year median of 3.00. Over the past 10 years, this metric has ranged from a low of 1.00 to a high of 6.00. The Biotechnology industry median Piotroski F-Score is 3.00. Atara Biotherapeutics' value of 2 is 33.3% below this industry median. Based on the distribution chart, Atara Biotherapeutics ranks #983 out of 1342 companies in the Biotechnology industry, which is below the industry midpoint. Overall, Atara Biotherapeutics has a GF Score™ of 31/100 and is considered Significantly Overvalued, reflecting its overall financial health beyond just this single metric.
How does Atara Biotherapeutics' Piotroski F-Score compare to RNTX and IBIO?
According to the Biotechnology industry distribution chart, Atara Biotherapeutics ranks #983 out of 1342 companies for Piotroski F-Score. This places Atara Biotherapeutics in the lower half of its industry. The industry median Piotroski F-Score is 3.00. Atara Biotherapeutics' value of 2 is 33.3% below this benchmark. Historically, Atara Biotherapeutics' own Piotroski F-Score has ranged from 1.00 to 6.00 over the past decade. While the company's 10-year median is 3.00 vs. the industry median of 3.00, Atara Biotherapeutics has consistently been below the industry average. See the competitive comparison table and distribution chart on this page for a detailed peer-by-peer breakdown.
What is a good Piotroski F-Score for a Biotechnology company?
The median Piotroski F-Score among Biotechnology companies is 3.00, based on 1,342 companies in the industry. Companies in the top quartile (top 25%) have a Piotroski F-Score significantly above this median, while those in the bottom quartile fall well below. However, Piotroski F-Score should not be evaluated in isolation — investors should consider it alongside profitability, growth, and financial strength metrics. Atara Biotherapeutics's current Piotroski F-Score of 2 is 33.3% below the industry median. Use the industry distribution chart on this page to see where any company falls relative to its peers.
What does a high Piotroski F-Score mean?
A high Piotroski F-Score can signal that a stock is expensive relative to its fundamentals. The Piotroski F-score grades a company's business operating strength from 0-9. View historical data on Atara Biotherapeutics and its competitors. For the Biotechnology industry, the median Piotroski F-Score is 3.00 — values significantly above this may indicate overvaluation, while values below may suggest a bargain or underlying issues. Atara Biotherapeutics's current Piotroski F-Score is 2, which is 33% below median its own 10-year median of 3.00. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Atara Biotherapeutics stock overvalued right now?
Based on GuruFocus' analysis, Atara Biotherapeutics (ATRA) is currently considered Significantly Overvalued. The stock's GF Value™ is $1.56, compared to a current price of $10.14 — trading 550% above its estimated fair value. The current Piotroski F-Score is 2, which is 33% below median its 10-year median of 3.00 and 33.3% below the Biotechnology industry median of 3.00. Atara Biotherapeutics' overall GF Score™ is 31/100 with 7 warning signs to review. Investors should evaluate multiple metrics — including profitability, growth, and financial strength — before making a decision.
How is Piotroski F-Score calculated?
Piotroski F-Score is calculated from a company's financial statements. For Atara Biotherapeutics (ATRA), the current Piotroski F-Score is 2 as of Jun. 25, 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 Atara Biotherapeutics (ATRA) Overvalued in 2026?
Based on GuruFocus' analysis, Atara Biotherapeutics stock appears to be overvalued.
The current stock price of $10.14 is trading 550% above its estimated GF Value™ of $1.56.
GuruFocus considers Atara Biotherapeutics to be Significantly Overvalued.
Key valuation signals for ATRA:
Piotroski F-Score: 2 (33% below median its 10-year median of 3.00)
GF Value™: $1.56 vs. price of $10.14 (550% above fair value)
Industry Position: 33.3% below the Biotechnology median (#983 of 1342)
No single metric tells the full story. See the ATRA stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.
Atara Biotherapeutics Inc operates in the United States healthcare sector. It focuses on developing transformative therapies for patients with serious diseases, including solid tumors, hematologic cancers, and autoimmune diseases. It operates and manages business as one operating and reportable segment which is the business of developing therapeutics. The company's product candidates comprise Tab-cel, ATA3431, and ATA3219.
31GF Score
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