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.
In calculating the Net-Net Working Capital (NNWC), Benjamin Graham assumed that a company's accounts receivable is only worth 75% its value, its inventory is only worth 50% of its value, but its liabilities have to be paid in full. In addition, Graham believed that preferred stock belongs on the liability side of the balance sheet, not as part of capital and surplus. This is a conservative way of estimating the company's value.
Atara Biotherapeutics's Net-Net Working Capital for the quarter that ended in Mar. 2026 was $-5.75.
The industry rank for Atara Biotherapeutics's Net-Net Working Capital or its related term are showing as below:
ATRA's Price-to-Net-Net-Working-Capital is not ranked *
in the Biotechnology industry.
Industry Median: 5.3 * Ranked among companies with meaningful Price-to-Net-Net-Working-Capital only.
Atara Biotherapeutics (NAS:ATRA) Net-Net Working Capital Explanation
One research study, covering the years 1970 through 1983 showed that portfolios picked at the beginning of each year, and held for one year, returned 29.4 percent, on average, over the 13-year period, compared to 11.5 percent for the S&P 500 Index. Other studies of Graham's strategy produced similar results.
Benjamin Graham looked for companies whose market values were less than two-thirds of their net-net value. They are collected under our Net-Net screener.
Atara Biotherapeutics Net-Net Working Capital Related Terms
Atara Biotherapeutics Net-Net Working Capital Historical Data
* Premium members only.
The historical data trend for Atara Biotherapeutics's Net-Net Working Capital 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.
Atara Biotherapeutics Net-Net Working Capital Chart
ATRA vs IBIO, ANVS, ENLV: Net-Net Working Capital Comparison
For the Biotechnology subindustry, Atara Biotherapeutics's Price-to-Net-Net-Working-Capital, along with its competitors' market caps and Price-to-Net-Net-Working-Capital 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 Price-to-Net-Net-Working-Capital vs Biotechnology Industry
For the Biotechnology industry and Healthcare sector, Atara Biotherapeutics's Price-to-Net-Net-Working-Capital distribution charts can be found below:
* The bar in red indicates where Atara Biotherapeutics's Price-to-Net-Net-Working-Capital 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.
In calculating the Net-Net Working Capital (NNWC), Benjamin Graham assumed that a company's accounts receivable is only worth 75% its value, its inventory is only worth 50% of its value, but its liabilities have to be paid in full.
In addition, Graham believed that preferred stock belongs on the liability side of the balance sheet, not as part of capital and surplus. In "Security Analysis", preferred stock is dubbed "an imperfect creditorship position" that is best placed on the balance sheet alongside funded debt.
This is a conservative way of estimating the company's value.
What does a Net-Net Working Capital of $-5.75 mean?
Atara Biotherapeutics (ATRA) has a Net-Net Working Capital of $-5.75 as of Mar. 2026. Ben Graham defined net-net working capital as the per-share sum of cash, 75% of receivables and 50% of inventory less total liabilities. View historical data on Atara Biotherapeutics According to the industry distribution chart, Atara Biotherapeutics ranks #999999 out of 856 companies in the Biotechnology industry.
Is Atara Biotherapeutics' Net-Net Working Capital too high?
Atara Biotherapeutics' current Net-Net Working Capital is $-5.75. Based on the distribution chart, Atara Biotherapeutics ranks #999999 out of 856 companies in the Biotechnology industry, which is in the bottom quartile relative to peers. Overall, Atara Biotherapeutics has a GF Score™ of 33/100 and is considered Significantly Overvalued, reflecting its overall financial health beyond just this single metric.
How does Atara Biotherapeutics' Net-Net Working Capital compare to IBIO and ANVS?
According to the Biotechnology industry distribution chart, Atara Biotherapeutics ranks #999999 out of 856 companies for Net-Net Working Capital. This places Atara Biotherapeutics in the lower half of its industry. The industry median Net-Net Working Capital is 5.30. See the competitive comparison table and distribution chart on this page for a detailed peer-by-peer breakdown.
What is a good Net-Net Working Capital for a Biotechnology company?
The median Net-Net Working Capital among Biotechnology companies is 5.30, based on 856 companies in the industry. Companies in the top quartile (top 25%) have a Net-Net Working Capital significantly above this median, while those in the bottom quartile fall well below. However, Net-Net Working Capital 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 Net-Net Working Capital mean?
A high Net-Net Working Capital can signal that a stock is expensive relative to its fundamentals. Ben Graham defined net-net working capital as the per-share sum of cash, 75% of receivables and 50% of inventory less total liabilities. View historical data on Atara Biotherapeutics For the Biotechnology industry, the median Net-Net Working Capital is 5.30 — values significantly above this may indicate overvaluation, while values below may suggest a bargain or underlying issues. Atara Biotherapeutics's current Net-Net Working Capital is $-5.75. 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 $1.54, compared to a current price of $7.67 — trading 398.1% above its estimated fair value. The current Net-Net Working Capital is $-5.75. Atara Biotherapeutics' overall GF Score™ is 33/100 with 6 warning signs to review. Investors should evaluate multiple metrics — including profitability, growth, and financial strength — before making a decision.
How is Net-Net Working Capital calculated?
Net-Net Working Capital is calculated from a company's financial statements. For Atara Biotherapeutics (ATRA), the current Net-Net Working Capital is $-5.75 as of Mar. 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 $7.67 is trading 398.1% above its estimated GF Value™ of $1.54.
GuruFocus considers Atara Biotherapeutics to be Significantly Overvalued.
Key valuation signals for ATRA:
Net-Net Working Capital: $-5.75
GF Value™: $1.54 vs. price of $7.67 (398.1% above fair value)
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.
33GF Score
Get the complete analysis for ATRA
Net-Net Working Capital is just one metric. See GF Value™, 30-year financials, guru trades, warning signs, and more.
Quick Browse
Personalize
Premium Gurus 
Create New Portfolio
ATRA has been successfully added to your 
