Firefly AB (OSTO:FIRE) ROE % Adjusted to Book Value: 3.10% (As of Mar. 2026)

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.

OSTO:FIRE Firefly AB OSTO:FIRE
82 GF Score
Price kr160.50
GF Value kr189.84
Valuation Modestly Undervalued
! 2 Warning Signs
View Full Analysis

What is Firefly AB ROE % Adjusted to Book Value?

Firefly AB OSTO:FIRE -0.62% 82 ROE % Adjusted to Book Value is 3.10% as of Mar. 2026. GuruFocus rates OSTO:FIRE with a GF Score™ of 82/100 and a GF Value™ of kr189.84 (Modestly Undervalued). The stock has 2 warning signs investors should review.

Firefly AB's ROE % for the quarter that ended in Mar. 2026 was 17.80%. Firefly AB's PB Ratio for the quarter that ended in Mar. 2026 was 5.74. Firefly AB's ROE % Adjusted to Book Value for the quarter that ended in Mar. 2026 was 3.10%.

Firefly AB ROE % Adjusted to Book Value Related Terms

Firefly AB ROE % Adjusted to Book Value Historical Data

* Premium members only.

The historical data trend for Firefly AB's ROE % Adjusted to Book Value 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.

Firefly AB ROE % Adjusted to Book Value Chart

Firefly AB Annual Data
Trend Dec16 Dec17 Dec18 Dec19 Dec20 Dec21 Dec22 Dec23 Dec24 Dec25
ROE % Adjusted to Book Value
Get a 7-Day Free Trial Premium Member Only Premium Member Only 3.86 8.31 4.79 5.17 4.11

Firefly AB Quarterly Data
Jun21 Sep21 Dec21 Mar22 Jun22 Sep22 Dec22 Mar23 Jun23 Sep23 Dec23 Mar24 Jun24 Sep24 Dec24 Mar25 Jun25 Sep25 Dec25 Mar26
ROE % Adjusted to Book Value Get a 7-Day Free Trial Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only 5.08 -0.68 6.93 6.22 3.10

OSTO:FIRE vs TT, JCI, CARR: ROE % Adjusted to Book Value Comparison

For the Building Products & Equipment subindustry, Firefly AB's ROE % Adjusted to Book Value, along with its competitors' market caps and ROE % Adjusted to Book Value 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.

Firefly AB ROE % Adjusted to Book Value vs Construction Industry

For the Construction industry and Industrials sector, Firefly AB's ROE % Adjusted to Book Value distribution charts can be found below:

* The bar in red indicates where Firefly AB's ROE % Adjusted to Book Value falls into.


OSTO:FIRE
82GF Score
Firefly AB OSTO:FIRE
ROE % Adjusted to Book Value is just one metric. See GF Score™, valuation, warning signs, and more.
View Full Analysis

Firefly AB ROE % Adjusted to Book Value Calculation

Firefly AB's ROE % Adjusted to Book Value for the fiscal year that ended in Dec. 2025 is calculated as

ROE % Adjusted to Book Value=ROE % / PB Ratio
=26.11% / 6.35
=4.11%

Firefly AB's ROE % Adjusted to Book Value for the quarter that ended in Mar. 2026 is calculated as

ROE % Adjusted to Book Value=ROE % / PB Ratio
=17.80% / 5.74
=3.10%

* 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.

What does a ROE % Adjusted to Book Value of 3.10% mean?
Firefly AB (OSTO:FIRE) has a ROE % Adjusted to Book Value of 3.10% as of Mar. 2026. Return on equity adjusted to book is the ratio of return on equity to price-book ratio. View historical data on Firefly AB and its competitors.
Is Firefly AB's ROE % Adjusted to Book Value too high?
Firefly AB's current ROE % Adjusted to Book Value is 3.10%. Overall, Firefly AB has a GF Score™ of 82/100 and is considered Modestly Undervalued, reflecting its overall financial health beyond just this single metric.
How does Firefly AB's ROE % Adjusted to Book Value compare to TT and JCI?
Firefly AB's ROE % Adjusted to Book Value of 3.10% can be compared against companies in the Construction industry. See the competitive comparison table and distribution chart on this page for a detailed peer-by-peer breakdown.
What is a good ROE % Adjusted to Book Value for a Construction company?
A good ROE % Adjusted to Book Value depends on the Construction industry context. However, ROE % Adjusted to Book Value 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 ROE % Adjusted to Book Value mean?
A high ROE % Adjusted to Book Value can signal that a stock is expensive relative to its fundamentals. Return on equity adjusted to book is the ratio of return on equity to price-book ratio. View historical data on Firefly AB and its competitors. Firefly AB's current ROE % Adjusted to Book Value is 3.10%. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Firefly AB stock overvalued right now?
Based on GuruFocus' analysis, Firefly AB (OSTO:FIRE) is currently considered Modestly Undervalued. The stock's GF Value™ is kr189.84, compared to a current price of kr160.50 — trading 15.5% below its estimated fair value. The current ROE % Adjusted to Book Value is 3.10%. Firefly AB's overall GF Score™ is 82/100 with 2 warning signs to review. Investors should evaluate multiple metrics — including profitability, growth, and financial strength — before making a decision.
How is ROE % Adjusted to Book Value calculated?
ROE % Adjusted to Book Value is calculated from a company's financial statements. For Firefly AB (OSTO:FIRE), the current ROE % Adjusted to Book Value is 3.10% 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 Firefly AB (OSTO:FIRE) Overvalued in 2026?

Based on GuruFocus' analysis, Firefly AB stock appears to be undervalued. The current stock price of kr160.50 is trading 15.5% below its estimated GF Value™ of kr189.84. GuruFocus considers Firefly AB to be Modestly Undervalued.

Key valuation signals for OSTO:FIRE:

  • ROE % Adjusted to Book Value: 3.10%
  • GF Value™: kr189.84 vs. price of kr160.50 (15.5% below fair value)
  • GF Score™: 82/100 with 2 warning signs

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

Firefly AB Business Description

Address Heliosgatan 3, Stockholm, SWE, 120 30
Firefly AB is a supplier of spark detection, fire and dust explosion protection systems in Sweden. The company develops, manufactures and sells high-tech systems, which detect and minimise the risk of fires and dust explosions. It has two business areas: Industrial applications and Infra systems. Industrial applications include customized fire prevention systems, which monitor industrial processes in areas such as tissue, food, woodworking, bioenergy, and recycling. The business area of Infra systems includes early fire detection in subway-, train-, road or cable tunnel systems by means of multiple-gas detection.
82GF Score

Get the complete analysis for OSTO:FIRE

ROE % Adjusted to Book Value is just one metric. See GF Value™, 30-year financials, guru trades, warning signs, and more.

kr160.50
Price
kr189.84
GF Value