National GridNGGTF +4.54%74 Piotroski F-Score is 6 as of Jun. 24, 2026, which is at its 10-year median of 6.00. GuruFocus rates NGGTF with a GF Score™ of 74/100 and a GF Value™ of $9.67 (Significantly Overvalued). The stock has 5 warning signs investors should review. Among 490 Utilities - Regulated companies, National Grid ranks better than 69.39% on this metric.
The zones of discrimination were as such:
Good or high score = 7, 8, 9
Bad or low score = 0, 1, 2, 3
National Grid has an F-score of 6 indicating the company's financial situation is typical for a stable company.
The historical rank and industry rank for National Grid's Piotroski F-Score or its related term are showing as below:
NGGTF'
s Piotroski F-Score Range Over the Past 10 Years
Min: 3 Med: 6 Max: 7
Current: 6
During the past 13 years, the highest Piotroski F-Score of National Grid was 7. The lowest was 3. And the median was 6.
National Grid (OTCPK:NGGTF) Piotroski F-Score Explanation
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.
National Grid Piotroski F-Score Related Terms
National Grid Piotroski F-Score Historical Data
* Premium members only.
The historical data trend for National Grid'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.
NGGTF vs NEE, SO, DUK: Piotroski F-Score Comparison
For the Utilities - Regulated Electric subindustry, National Grid'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.
National Grid Piotroski F-Score vs Utilities - Regulated Industry
For the Utilities - Regulated industry and Utilities sector, National Grid's Piotroski F-Score distribution charts can be found below:
* The bar in red indicates where National Grid'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.
National Grid's current Net Income (TTM) was 4,321.
==> Positive ==> Score 1.
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.
National Grid's return on assets of this year was 0.03133454. National Grid's return on assets of last year was 0.03001008.
==> This year is higher. ==> Score 1.
Question 4. Quality of Earnings (Accrual)
Compare Cash flow return on assets (2) to return on assets (1)
National Grid's gearing of this year was 0.40484019. National Grid's gearing of last year was 0.421514.
==> This year is lower or equal to last year. ==> Score 1.
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
National Grid's current ratio of this year was 0.76400937. National Grid's current ratio of last year was 1.34940216.
==> Last year's current ratio is higher ==> Score 0.
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.
National Grid's number of shares in issue this year was 4971. National Grid's number of shares in issue last year was 4729.
==> 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.
National Grid's gross margin of this year was 0.79759143. National Grid's gross margin of last year was 0.77418653.
==> 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
National Grid's asset turnover of this year was 0.17100096. National Grid's asset turnover of last year was 0.19005008.
==> Last year's asset turnover is higher ==> Score 0.
Evaluation
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6
Good or high score = 7, 8, 9
Bad or low score = 0, 1, 2, 3
National Grid has an F-score of 6 indicating the company's financial situation is typical for a stable company.
National Grid (NGGTF) has a Piotroski F-Score of 6 as of Jun. 24, 2026. The Piotroski F-score grades a company's business operating strength from 0-9. View historical data on National Grid and its competitors. This is near median its historical median of 6.00. Over the past decade, National Grid's Piotroski F-Score has ranged from 3.00 to 7.00. According to the industry distribution chart, National Grid ranks #150 out of 490 companies in the Utilities - Regulated industry, placing it in the top 30.6%.
Is National Grid's Piotroski F-Score too high?
National Grid's current Piotroski F-Score of 6 is near median its 10-year median of 6.00. Over the past 10 years, this metric has ranged from a low of 3.00 to a high of 7.00. The Utilities - Regulated industry median Piotroski F-Score is 6.00. National Grid's value of 6 is 0% at this industry median. Based on the distribution chart, National Grid ranks #150 out of 490 companies in the Utilities - Regulated industry, which is above the industry midpoint. Overall, National Grid has a GF Score™ of 74/100 and is considered Significantly Overvalued, reflecting its overall financial health beyond just this single metric.
How does National Grid's Piotroski F-Score compare to NEE and SO?
According to the Utilities - Regulated industry distribution chart, National Grid ranks #150 out of 490 companies for Piotroski F-Score. This puts National Grid in the upper half of its industry. The industry median Piotroski F-Score is 6.00. National Grid's value of 6 is 0% at this benchmark. Historically, National Grid's own Piotroski F-Score has ranged from 3.00 to 7.00 over the past decade. While the company's 10-year median is 6.00 vs. the industry median of 6.00, National Grid has consistently been at 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 an Utilities - Regulated company?
The median Piotroski F-Score among Utilities - Regulated companies is 6.00, based on 490 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. National Grid's current Piotroski F-Score of 6 is 0% at 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 National Grid and its competitors. For the Utilities - Regulated industry, the median Piotroski F-Score is 6.00 — values significantly above this may indicate overvaluation, while values below may suggest a bargain or underlying issues. National Grid's current Piotroski F-Score is 6, which is near median its own 10-year median of 6.00. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is National Grid stock overvalued right now?
Based on GuruFocus' analysis, National Grid (NGGTF) is currently considered Significantly Overvalued. The stock's GF Value™ is $9.67, compared to a current price of $16.56 — trading 71.2% above its estimated fair value. The current Piotroski F-Score is 6, which is near median its 10-year median of 6.00 and 0% at the Utilities - Regulated industry median of 6.00. National Grid's overall GF Score™ is 74/100 with 5 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 National Grid (NGGTF), the current Piotroski F-Score is 6 as of Jun. 24, 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 National Grid (NGGTF) Overvalued in 2026?
Based on GuruFocus' analysis, National Grid stock appears to be overvalued.
The current stock price of $16.56 is trading 71.2% above its estimated GF Value™ of $9.67.
GuruFocus considers National Grid to be Significantly Overvalued.
Key valuation signals for NGGTF:
Piotroski F-Score: 6 (near median its 10-year median of 6.00)
GF Value™: $9.67 vs. price of $16.56 (71.2% above fair value)
Industry Position: 0% at the Utilities - Regulated median (#150 of 490)
No single metric tells the full story. See the NGGTF stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.
National Grid owns and operates the electric transmission system in England and Wales. It sold the bulk of its UK gas transmission business in fiscal 2023 to fund the acquisition of PPL's UK power distribution assets. In the Northeastern United States, it serves electricity and gas customers combined in three states. It also owns regulated transmission electricity networks in the United States, metering services and merchant transmission lines in the UK.
74GF Score
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