MannKind (STU:NNFN) Quality Rank

Author: Vera Yuan Vera Yuan
Vera Yuan
Vera Yuan
Director of Data and Quant Analytics at GuruFocus
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.
Reviewed by: Charlie Tian Charlie Tian
Charlie Tian
Charlie Tian
Founder & CEO of GuruFocus
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.

STU:NNFN MannKind Corp STU:NNFN
71 GF Score
Price €3.73
GF Value €6.46
Valuation Possible Value Trap
! 8 Warning Signs
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What is MannKind Quality Rank?

The Quality Rank measures the business quality of a company relative to other companies. It is ranked based on the strength of the balance sheet, as well as the profitability and growth of the business. The ranked companies are split in equal numbers and then ranked from 1 to 10, with 10 being the highest.

The rank of balance sheet (30%)

The rank of balance sheet is done through the ranking of:
  • Interest coverage
  • Zscore
  • Debt to revenue
  • Equity to asset
  • Cash to debt

The rank of Profitability (70%)

The ranking of Profitability is done by ranking:
  • Operating margin mean rank (10-year mean average profit margine)
  • Operating margin growth rank
  • Fscore
  • Predictability rank
  • Revenue growth rank (5 year), when the growth is higher than 25%, set it as 25%
  • Num of year profit (number of years that is profitable within the last 10 years)
  • ROIC median (10-year median of ROIC)

MannKind Quality Rank Related Terms

STU:NNFN
71GF Score
MannKind Corp STU:NNFN
Quality Rank is just one metric. See GF Score™, valuation, warning signs, and more.
View Full Analysis

Is MannKind (STU:NNFN) Overvalued in 2026?

Based on GuruFocus' analysis, MannKind stock appears to be undervalued. The current stock price of €3.73 is trading 42.2% below its estimated GF Value™ of €6.46. GuruFocus considers MannKind to be Possible Value Trap.

Key valuation signals for STU:NNFN:

  • Quality Rank:
  • GF Value™: €6.46 vs. price of €3.73 (42.2% below fair value)
  • GF Score™: 71/100 with 8 warning signs

No single metric tells the full story. See the STU:NNFN stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.

MannKind Business Description

Other Exchanges MNKD:USA
Address 1 Casper Street, Danbury, CT, USA, 06810
MannKind Corp is a biopharmaceutical company focused on the development and commercialization of patient-centric therapies that address serious unmet medical needs for those living with cardiometabolic and orphan lung diseases. The Company is currently commercializing three products: Afrezza (insulin human) Inhalation Powder, an ultra rapid-acting inhaled insulin indicated to improve glycemic control in adults with diabetes; Furoscix (furosemide injection), to treat fluid buildup in patients with chronic heart failure or chronic kidney disease; and the V-Go wearable insulin delivery device, which provides continuous subcutaneous infusion of insulin in adults that require insulin.
71GF Score

Get the complete analysis for STU:NNFN

Quality Rank is just one metric. See GF Value™, 30-year financials, guru trades, warning signs, and more.

€3.73
Price
€6.46
GF Value