LightAir AB (NGM:LAIR) Days Inventory: 389.99 (As of Dec. 2025) — 41% Above Median

Author: Vera Yuan Vera Yuan
Vera Yuan
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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.
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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.

NGM:LAIR LightAir AB NGM:LAIR
34 GF Score
Price kr0.69
GF Value kr0.28
Valuation Significantly Overvalued
! 3 Warning Signs
View Full Analysis

What is LightAir AB Days Inventory?

LightAir AB NGM:LAIR 34 Days Inventory is 389.99 as of Dec. 2025, which is 41% above its 10-year median of 277.05. GuruFocus rates NGM:LAIR with a GF Score™ of 34/100 and a GF Value™ of kr0.28 (Significantly Overvalued). The stock has 3 warning signs investors should review. Among 2,969 Industrial Products companies, LightAir AB ranks worse than 91.61% on this metric.

Days Inventory is also known as Days Sales of Inventory (DSI). LightAir AB's Average Total Inventories for the six months ended in Dec. 2025 was kr3.62 Mil. LightAir AB's Cost of Goods Sold for the six months ended in Dec. 2025 was kr1.69 Mil. Hence, LightAir AB's Days Inventory for the six months ended in Dec. 2025 was 389.99.

The historical rank and industry rank for LightAir AB's Days Inventory or its related term are showing as below:

NGM:LAIR' s Days Inventory Range Over the Past 10 Years
Min: 23.74   Med: 277.05   Max: 556.23
Current: 333.57

During the past 13 years, LightAir AB's highest Days Inventory was 556.23. The lowest was 23.74. And the median was 277.05.

NGM:LAIR's Days Inventory is ranked worse than
91.61% of 2969 companies
in the Industrial Products industry
Industry Median: 119.47 vs NGM:LAIR: 333.57

LightAir AB's Days Inventory declined from Dec. 2024 (392.91) to Dec. 2025 (389.99).

Inventory Turnover measures how fast the company turns over its inventory within a year. LightAir AB's Inventory Turnover for the six months ended in Dec. 2025 was 0.47.

Inventory-to-Revenue determines the ability of a company to manage their inventory levels. It measures the percentage of Inventories the company currently has on hand to support the current amount of Revenue. LightAir AB's Inventory-to-Revenue for the six months ended in Dec. 2025 was 0.58.


LightAir AB  (NGM:LAIR) Days Inventory Explanation

Days Inventory indicates the liquidity of the inventory. Generally, a lower Days Inventory is preferred as it indicates a shorter duration to clear off the inventory. An increase of the ratio may indicate the company's sales slowed. Similar ratios related to Days Inventory are:

1. Inventory Turnover measures how fast the company turns over its inventory within a year.

LightAir AB's Inventory Turnover for the six months ended in Dec. 2025 is calculated as

2. Inventory-to-Revenue determines the ability of a company to manage their inventory levels. It measures the percentage of Inventories the company currently has on hand to support the current amount of Revenue.

LightAir AB's Inventory to Revenue for the six months ended in Dec. 2025 is calculated as

* 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.


Be Aware

A lot of business are seasonable. It makes more sense to compare Days Inventory from the same period in the previous year instead of from the previous quarter.


LightAir AB Days Inventory Related Terms


LightAir AB Days Inventory Historical Data

* Premium members only.

The historical data trend for LightAir AB's Days Inventory 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.

LightAir AB Days Inventory Chart

LightAir AB Annual Data
Trend Dec16 Dec17 Dec18 Dec19 Dec20 Dec21 Dec22 Dec23 Dec24 Dec25
Days Inventory
Get a 7-Day Free Trial Premium Member Only Premium Member Only 295.77 471.92 556.23 391.97 290.23

LightAir AB Semi-Annual Data
Jun16 Dec16 Jun17 Dec17 Jun18 Dec18 Jun19 Dec19 Jun20 Dec20 Jun21 Dec21 Jun22 Dec22 Jun23 Dec23 Jun24 Dec24 Jun25 Dec25
Days Inventory 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 563.62 589.56 392.91 330.39 389.99

NGM:LAIR vs VLTO, ZWS, CECO: Days Inventory Comparison

For the Pollution & Treatment Controls subindustry, LightAir AB's Days Inventory, along with its competitors' market caps and Days Inventory 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.


LightAir AB Days Inventory vs Industrial Products Industry

For the Industrial Products industry and Industrials sector, LightAir AB's Days Inventory distribution charts can be found below:

* The bar in red indicates where LightAir AB's Days Inventory falls into.


NGM:LAIR
34GF Score
LightAir AB NGM:LAIR
Days Inventory is just one metric. See GF Score™, valuation, warning signs, and more.
View Full Analysis

LightAir AB Days Inventory Calculation

Days Inventory indicates the number of days of goods in sales that a company has in the inventory.

LightAir AB's Days Inventory for the fiscal year that ended in Dec. 2025 is calculated as

Days Inventory (A: Dec. 2025 )
=Average Total Inventories / Cost of Goods Sold*Days in Period
=( (Total Inventories (A: Dec. 2024 ) + Total Inventories (A: Dec. 2025 )) / count ) / Cost of Goods Sold (A: Dec. 2025 )*Days in Period
=( (3.902 + 2.561) / 2 ) / 4.064*365
=3.2315 / 4.064*365
=290.23

LightAir AB's Days Inventory for the quarter that ended in Dec. 2025 is calculated as:

Days Inventory (Q: Dec. 2025 )
=Average Total Inventories / Cost of Goods Sold*Days in Period
=( (Total Inventories (Q: Jun. 2025 ) + Total Inventories (Q: Dec. 2025 )) / count ) / Cost of Goods Sold (Q: Dec. 2025 )*Days in Period
=( (4.679 + 2.561) / 2 ) / 1.694*365 / 2
=3.62 / 1.694*365 / 2
=389.99

* 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.

Frequently Asked Questions Learn more about Days Inventory →
What does a Days Inventory of 389.99 mean?
LightAir AB (NGM:LAIR) has a Days Inventory of 389.99 as of Dec. 2025. Days inventory represents the average amount of days a company holds inventory before selling it. View historical data on LightAir AB and its competitors. This is 41% above median its historical median of 277.05. Over the past decade, LightAir AB's Days Inventory has ranged from 23.74 to 556.23. According to the industry distribution chart, LightAir AB ranks #2720 out of 2969 companies in the Industrial Products industry, placing it in the top 91.6%.
Is LightAir AB's Days Inventory too high?
LightAir AB's current Days Inventory of 389.99 is 41% above median its 10-year median of 277.05. Over the past 10 years, this metric has ranged from a low of 23.74 to a high of 556.23. The Industrial Products industry median Days Inventory is 119.47. LightAir AB's value of 389.99 is 226.4% above this industry median. Based on the distribution chart, LightAir AB ranks #2720 out of 2969 companies in the Industrial Products industry, which is in the bottom quartile relative to peers. Overall, LightAir AB has a GF Score™ of 34/100 and is considered Significantly Overvalued, reflecting its overall financial health beyond just this single metric.
How does LightAir AB's Days Inventory compare to VLTO and ZWS?
According to the Industrial Products industry distribution chart, LightAir AB ranks #2720 out of 2969 companies for Days Inventory. This places LightAir AB in the lower half of its industry. The industry median Days Inventory is 119.47. LightAir AB's value of 389.99 is 226.4% above this benchmark. Historically, LightAir AB's own Days Inventory has ranged from 23.74 to 556.23 over the past decade. While the company's 10-year median is 277.05 vs. the industry median of 119.47, LightAir AB has consistently been above 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 Days Inventory for an Industrial Products company?
The median Days Inventory among Industrial Products companies is 119.47, based on 2,969 companies in the industry. Companies in the top quartile (top 25%) have a Days Inventory significantly above this median, while those in the bottom quartile fall well below. However, Days Inventory should not be evaluated in isolation — investors should consider it alongside profitability, growth, and financial strength metrics. LightAir AB's current Days Inventory of 389.99 is 226.4% above 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 Days Inventory mean?
A high Days Inventory can signal that a stock is expensive relative to its fundamentals. Days inventory represents the average amount of days a company holds inventory before selling it. View historical data on LightAir AB and its competitors. For the Industrial Products industry, the median Days Inventory is 119.47 — values significantly above this may indicate overvaluation, while values below may suggest a bargain or underlying issues. LightAir AB's current Days Inventory is 389.99, which is 41% above median its own 10-year median of 277.05. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is LightAir AB stock overvalued right now?
Based on GuruFocus' analysis, LightAir AB (NGM:LAIR) is currently considered Significantly Overvalued. The stock's GF Value™ is kr0.28, compared to a current price of kr0.69 — trading 146.4% above its estimated fair value. The current Days Inventory is 389.99, which is 41% above median its 10-year median of 277.05 and 226.4% above the Industrial Products industry median of 119.47. LightAir AB's overall GF Score™ is 34/100 with 3 warning signs to review. Investors should evaluate multiple metrics — including profitability, growth, and financial strength — before making a decision.
How is Days Inventory calculated?
Days Inventory is calculated from a company's financial statements. For LightAir AB (NGM:LAIR), the current Days Inventory is 389.99 as of Dec. 2025. 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 LightAir AB (NGM:LAIR) Overvalued in 2026?

Based on GuruFocus' analysis, LightAir AB stock appears to be overvalued. The current stock price of kr0.69 is trading 146.4% above its estimated GF Value™ of kr0.28. GuruFocus considers LightAir AB to be Significantly Overvalued.

Key valuation signals for NGM:LAIR:

  • Days Inventory: 389.99 (41% above median its 10-year median of 277.05)
  • GF Value™: kr0.28 vs. price of kr0.69 (146.4% above fair value)
  • GF Score™: 34/100 with 3 warning signs
  • Industry Position: 226.4% above the Industrial Products median (#2720 of 2969)

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


LightAir AB Business Description

Address Svetsarvagen 13, kersberga, Stockholm, SWE, 184 42
LightAir AB is engaged in manufacturing and selling of air purifiers used for different industrial purposes such as traffic pollution, pet allergen, industrial pollution, smoke, and others. Its Air purifiers products include IonFlow Signature, IonFlow Evolution, IonFlow Style, IonFlow Surface, and others. The company distributes its products in Europe, Asia, and North America.
34GF Score

Get the complete analysis for NGM:LAIR

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

kr0.69
Price
kr0.28
GF Value