WAB (Westinghouse Air Brake Technologies) Days Inventory: 135.14 (As of Mar. 2026) — 19% Above Median


WAB Westinghouse Air Brake Technologies Corp WAB
89 GF Score
Price $269.53
GF Value $212.55
Valuation Modestly Overvalued
! 8 Warning Signs
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What is Westinghouse Air Brake Technologies Days Inventory?

Westinghouse Air Brake Technologies WAB -4.57% 89 Days Inventory is 135.14 as of Mar. 2026, which is 19% above its 10-year median of 113.25. GuruFocus rates WAB with a GF Scoreâ„¢ of 89/100 and a GF Valueâ„¢ of $212.55 (Modestly Overvalued). The stock has 8 warning signs investors should review. Among 796 Transportation companies, Westinghouse Air Brake Technologies ranks worse than 92.21% on this metric.

Days Inventory is also known as Days Sales of Inventory (DSI). Westinghouse Air Brake Technologies's Average Total Inventories for the three months ended in Mar. 2026 was $2,798 Mil. Westinghouse Air Brake Technologies's Cost of Goods Sold for the three months ended in Mar. 2026 was $1,889 Mil. Hence, Westinghouse Air Brake Technologies's Days Inventory for the three months ended in Mar. 2026 was 135.14.

The historical rank and industry rank for Westinghouse Air Brake Technologies's Days Inventory or its related term are showing as below:

WAB' s Days Inventory Range Over the Past 10 Years
Min: 80.68   Med: 113.25   Max: 128.68
Current: 128.68

During the past 13 years, Westinghouse Air Brake Technologies's highest Days Inventory was 128.68. The lowest was 80.68. And the median was 113.25.

WAB's Days Inventory is ranked worse than
92.21% of 796 companies
in the Transportation industry
Industry Median: 12.455 vs WAB: 128.68

Westinghouse Air Brake Technologies's Days Inventory increased from Mar. 2025 (125.19) to Mar. 2026 (135.14). It might indicate that Westinghouse Air Brake Technologies's sales slowed down.

Inventory Turnover measures how fast the company turns over its inventory within a year. Westinghouse Air Brake Technologies's Inventory Turnover for the three months ended in Mar. 2026 was 0.68.

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. Westinghouse Air Brake Technologies's Inventory-to-Revenue for the three months ended in Mar. 2026 was 0.95.


Westinghouse Air Brake Technologies  (NYSE:WAB) 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.

Westinghouse Air Brake Technologies's Inventory Turnover for the three months ended in Mar. 2026 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.

Westinghouse Air Brake Technologies's Inventory to Revenue for the three months ended in Mar. 2026 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.


Westinghouse Air Brake Technologies Days Inventory Related Terms


Westinghouse Air Brake Technologies Days Inventory Historical Data

* Premium members only.

The historical data trend for Westinghouse Air Brake Technologies'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.

Westinghouse Air Brake Technologies Days Inventory Chart

Westinghouse Air Brake Technologies 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 111.48 116.70 117.04 119.52 125.43

Westinghouse Air Brake Technologies Quarterly Data
Jun21 Sep21 Dec21 Mar22 Jun22 Sep22 Dec22 Mar23 Jun23 Sep23 Dec23 Mar24 Jun24 Sep24 Dec24 Mar25 Jun25 Sep25 Dec25 Mar26
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 125.19 127.71 128.79 125.35 135.14

WAB vs NSC, CSX, TRN: Days Inventory Comparison

For the Railroads subindustry, Westinghouse Air Brake Technologies'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.


Westinghouse Air Brake Technologies Days Inventory vs Transportation Industry

For the Transportation industry and Industrials sector, Westinghouse Air Brake Technologies's Days Inventory distribution charts can be found below:

* The bar in red indicates where Westinghouse Air Brake Technologies's Days Inventory falls into.


WAB
89GF Score
Westinghouse Air Brake Technologies Corp WAB
Days Inventory is just one metric. See GF Score™, valuation, warning signs, and more.
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Westinghouse Air Brake Technologies Days Inventory Calculation

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

Westinghouse Air Brake Technologies'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
=( (2314 + 2745) / 2 ) / 7361*365
=2529.5 / 7361*365
=125.43

Westinghouse Air Brake Technologies's Days Inventory for the quarter that ended in Mar. 2026 is calculated as:

Days Inventory (Q: Mar. 2026 )
=Average Total Inventories / Cost of Goods Sold*Days in Period
=( (Total Inventories (Q: Dec. 2025 ) + Total Inventories (Q: Mar. 2026 )) / count ) / Cost of Goods Sold (Q: Mar. 2026 )*Days in Period
=( (2745 + 2850) / 2 ) / 1889*365 / 4
=2797.5 / 1889*365 / 4
=135.14

* 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 135.14 mean?
Westinghouse Air Brake Technologies (WAB) has a Days Inventory of 135.14 as of Mar. 2026. Days inventory represents the average amount of days a company holds inventory before selling it. View historical data on Westinghouse Air Brake Technologies and its competitors. This is 19% above median its historical median of 113.25. Over the past decade, Westinghouse Air Brake Technologies' Days Inventory has ranged from 80.68 to 128.68. According to the industry distribution chart, Westinghouse Air Brake Technologies ranks #734 out of 796 companies in the Transportation industry, placing it in the top 92.2%.
Is Westinghouse Air Brake Technologies' Days Inventory too high?
Westinghouse Air Brake Technologies' current Days Inventory of 135.14 is 19% above median its 10-year median of 113.25. Over the past 10 years, this metric has ranged from a low of 80.68 to a high of 128.68. The Transportation industry median Days Inventory is 12.46. Westinghouse Air Brake Technologies' value of 135.14 is 985% above this industry median. Based on the distribution chart, Westinghouse Air Brake Technologies ranks #734 out of 796 companies in the Transportation industry, which is in the bottom quartile relative to peers. Overall, Westinghouse Air Brake Technologies has a GF Scoreâ„¢ of 89/100 and is considered Modestly Overvalued, reflecting its overall financial health beyond just this single metric.
How does Westinghouse Air Brake Technologies' Days Inventory compare to NSC and CSX?
According to the Transportation industry distribution chart, Westinghouse Air Brake Technologies ranks #734 out of 796 companies for Days Inventory. This places Westinghouse Air Brake Technologies in the lower half of its industry. The industry median Days Inventory is 12.46. Westinghouse Air Brake Technologies' value of 135.14 is 985% above this benchmark. Historically, Westinghouse Air Brake Technologies' own Days Inventory has ranged from 80.68 to 128.68 over the past decade. While the company's 10-year median is 113.25 vs. the industry median of 12.46, Westinghouse Air Brake Technologies 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 a Transportation company?
The median Days Inventory among Transportation companies is 12.46, based on 796 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. Westinghouse Air Brake Technologies's current Days Inventory of 135.14 is 985% 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 Westinghouse Air Brake Technologies and its competitors. For the Transportation industry, the median Days Inventory is 12.46 — values significantly above this may indicate overvaluation, while values below may suggest a bargain or underlying issues. Westinghouse Air Brake Technologies's current Days Inventory is 135.14, which is 19% above median its own 10-year median of 113.25. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Westinghouse Air Brake Technologies stock overvalued right now?
Based on GuruFocus' analysis, Westinghouse Air Brake Technologies (WAB) is currently considered Modestly Overvalued. The stock's GF Value™ is $212.55, compared to a current price of $269.53 — trading 26.8% above its estimated fair value. The current Days Inventory is 135.14, which is 19% above median its 10-year median of 113.25 and 985% above the Transportation industry median of 12.46. Westinghouse Air Brake Technologies' overall GF Score™ is 89/100 with 8 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 Westinghouse Air Brake Technologies (WAB), the current Days Inventory is 135.14 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 Westinghouse Air Brake Technologies (WAB) Overvalued in 2026?

Based on GuruFocus' analysis, Westinghouse Air Brake Technologies stock appears to be overvalued. The current stock price of $269.53 is trading 26.8% above its estimated GF Value™ of $212.55. GuruFocus considers Westinghouse Air Brake Technologies to be Modestly Overvalued.

Key valuation signals for WAB:

  • Days Inventory: 135.14 (19% above median its 10-year median of 113.25)
  • GF Value™: $212.55 vs. price of $269.53 (26.8% above fair value)
  • GF Score™: 89/100 with 8 warning signs
  • Industry Position: 985% above the Transportation median (#734 of 796)

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


Westinghouse Air Brake Technologies Business Description

Address 30 Isabella Street, Pittsburgh, PA, USA, 15212
Westinghouse Air Brake Technologies Corp provides value-added, technology-based products and services for the freight rail and passenger transit industries and the mining, marine, and industrial markets. It provides its products and services through two main business segments: Freight and Transit. The company generates maximum revenue from the Freight segment, which manufactures new and modernized locomotives, provides aftermarket parts and services to existing locomotives, provides components to new and existing freight cars; builds new commuter locomotives; supplies rail control and infrastructure products, including electronics, positive train control equipment, signal design, and engineering services. Geographically, it generates a majority of its revenue from the United States.
89GF Score

Get the complete analysis for WAB

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

$269.53
Price
$212.55
GF Value