Zelluna ASAOSTO:ULTIO 28 Piotroski F-Score is 3 as of Jun. 26, 2026, which is 50% above its 10-year median of 2.00. GuruFocus rates OSTO:ULTIO with a GF Score™ of 28/100. The stock has 2 warning signs investors should review. Among 1,342 Biotechnology companies, Zelluna ASA ranks better than 54.99% on this metric.
Warning Sign:
Piotroski F-Score of 3 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
Zelluna ASA has an F-score of 3. It is a bad or low score, which usually implies poor business operation.
The historical rank and industry rank for Zelluna ASA's Piotroski F-Score or its related term are showing as below:
OSTO:ULTIo'
s Piotroski F-Score Range Over the Past 10 Years
Min: 1 Med: 2 Max: 4
Current: 3
During the past 11 years, the highest Piotroski F-Score of Zelluna ASA was 4. The lowest was 1. And the median was 2.
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.
Zelluna ASA Piotroski F-Score Related Terms
Zelluna ASA Piotroski F-Score Historical Data
* Premium members only.
The historical data trend for Zelluna ASA'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.
OSTO:ULTIO vs VRTX, REGN, ALNY: Piotroski F-Score Comparison
For the Biotechnology subindustry, Zelluna ASA'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.
Zelluna ASA Piotroski F-Score vs Biotechnology Industry
For the Biotechnology industry and Healthcare sector, Zelluna ASA's Piotroski F-Score distribution charts can be found below:
* The bar in red indicates where Zelluna ASA'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.
Zelluna ASA's current Net Income (TTM) was -131.77.
==> 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.
Zelluna ASA's return on assets of this year was -0.77752865. Zelluna ASA's return on assets of last year was -0.32745808.
==> Last year is higher ==> Score 0.
Question 4. Quality of Earnings (Accrual)
Compare Cash flow return on assets (2) to return on assets (1)
Zelluna ASA's current ratio of this year was 6.70449898. Zelluna ASA's current ratio of last year was 3.5543087.
==> 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.
Zelluna ASA's number of shares in issue this year was 26.27. Zelluna ASA's number of shares in issue last year was 77.491.
==> There is smaller number of shares in issue this year, or the same. ==> Score 1.
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.
Zelluna ASA's gross margin of this year was . Zelluna ASA's gross margin of last year was .
==> Last year's gross margin is higher ==> Score 0.
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
Zelluna ASA's asset turnover of this year was 0. Zelluna ASA's asset turnover of last year was 0.
==> Last year's asset turnover is higher ==> Score 0.
Evaluation
Piotroski F-Score
=
Que. 1
+
Que. 2
+
Que. 3
+
Que. 4
+
Que. 5
+
Que. 6
+
Que. 7
+
Que. 8
+
Que. 9
=
0
+
0
+
0
+
0
+
1
+
1
+
1
+
0
+
0
=
3
Good or high score = 7, 8, 9
Bad or low score = 0, 1, 2, 3
Zelluna ASA has an F-score of 3. It is a bad or low score, which usually implies poor business operation.
Zelluna ASA (OSTO:ULTIO) has a Piotroski F-Score of 3 as of Jun. 26, 2026. The Piotroski F-score grades a company's business operating strength from 0-9. View historical data on Zelluna ASA and its competitors. This is 50% above median its historical median of 2.00. Over the past decade, Zelluna ASA's Piotroski F-Score has ranged from 1.00 to 4.00. According to the industry distribution chart, Zelluna ASA ranks #604 out of 1342 companies in the Biotechnology industry, placing it in the top 45%.
Is Zelluna ASA's Piotroski F-Score too high?
Zelluna ASA's current Piotroski F-Score of 3 is 50% above median its 10-year median of 2.00. Over the past 10 years, this metric has ranged from a low of 1.00 to a high of 4.00. The Biotechnology industry median Piotroski F-Score is 3.00. Zelluna ASA's value of 3 is 0% at this industry median. Based on the distribution chart, Zelluna ASA ranks #604 out of 1342 companies in the Biotechnology industry, which is above the industry midpoint. Overall, Zelluna ASA has a GF Score™ of 28/100, reflecting its overall financial health beyond just this single metric.
How does Zelluna ASA's Piotroski F-Score compare to VRTX and REGN?
According to the Biotechnology industry distribution chart, Zelluna ASA ranks #604 out of 1342 companies for Piotroski F-Score. This puts Zelluna ASA in the upper half of its industry. The industry median Piotroski F-Score is 3.00. Zelluna ASA's value of 3 is 0% at this benchmark. Historically, Zelluna ASA's own Piotroski F-Score has ranged from 1.00 to 4.00 over the past decade. While the company's 10-year median is 2.00 vs. the industry median of 3.00, Zelluna ASA 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 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. Zelluna ASA's current Piotroski F-Score of 3 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 Zelluna ASA 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. Zelluna ASA's current Piotroski F-Score is 3, which is 50% above median its own 10-year median of 2.00. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Zelluna ASA stock overvalued right now?
Zelluna ASA (OSTO:ULTIO) has a current Piotroski F-Score of 3. The current Piotroski F-Score is 3, which is 50% above median its 10-year median of 2.00 and 0% at the Biotechnology industry median of 3.00. Zelluna ASA's overall GF Score™ is 28/100 with 2 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 Zelluna ASA (OSTO:ULTIO), the current Piotroski F-Score is 3 as of Jun. 26, 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.
Zelluna ASA is a biotechnology company established to eliminate solid cancers by unleashing the powerful elements of the immune system through pioneering the development of T cell receptor (TCR) guided natural killer (NK) cell therapies (TCR-NK). Its TCR-NK products are composed of healthy donor-derived NK cells that are genetically engineered to express a tumour-specific TCR that enable the TCR-NK cells to identify and eliminate cancer cells in the body of the patient. Its programme ZI-MA4-1, the first MAGE-A4-targeting TCR-NK therapy for solid tumours with high unmet medical need. Its other programmes include ZI-KL1-1, and ZI-PR-1.
28GF Score
Get the complete analysis for OSTO:ULTIO
Piotroski F-Score is just one metric. See GF Value™, 30-year financials, guru trades, warning signs, and more.
Quick Browse
Personalize
Premium Gurus 
Create New Portfolio
OSTO:ULTIO has been successfully added to your 
