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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.
Butler NationalBUKS -3.42%72 Days Inventory is 85.06 as of Apr. 2026, which is 15% above its 10-year median of 73.84. GuruFocus rates BUKS with a GF Score™ of 72/100 and a GF Value™ of $1.87 (Significantly Overvalued). The stock has 4 warning signs investors should review. Among 329 Aerospace & Defense companies, Butler National ranks better than 69.3% on this metric.
The historical rank and industry rank for Butler National's Days Inventory or its related term are showing as below:
BUKS'
s Days Inventory Range Over the Past 10 Years
Min: 70.47 Med: 73.84 Max: 91.79
Current: 88.79
During the past 13 years, Butler National's highest Days Inventory was 91.79. The lowest was 70.47. And the median was 73.84.
BUKS's Days Inventory is ranked better than 69.3% of 329
companies
in the Aerospace & Defense industry
Industry Median: 139.44
vs BUKS: 88.79
Butler National's Days Inventory
declined
from Apr. 2025 (90.18) to Apr. 2026 (85.06).
Inventory Turnover measures how fast the company turns over its inventory within a year.
Butler National's Inventory Turnover for the
three
months ended in Apr. 2026 was 1.07.
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.
Butler National's Inventory-to-Revenue for the
three
months ended in Apr. 2026 was 0.46.
Butler National (OTCPK:BUKS) 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.
Butler National's Inventory Turnover for the
three
months ended in Apr. 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.
Butler National's Inventory to Revenue for the
three
months ended in Apr. 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.
Butler National Days Inventory Related Terms
Butler National Days Inventory Historical Data
* Premium members only.
The historical data trend for Butler National'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.
BUKS vs SPCE, MRLN, ISSC: Days Inventory Comparison
For the Aerospace & Defense subindustry, Butler National'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.
Butler National Days Inventory vs Aerospace & Defense Industry
For the Aerospace & Defense industry and Industrials sector, Butler National's Days Inventory distribution charts can be found below:
* The bar in red indicates where Butler National's Days Inventory 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.
Butler National (BUKS) has a Days Inventory of 85.06 as of Apr. 2026. Days inventory represents the average amount of days a company holds inventory before selling it. View historical data on Butler National and its competitors. This is 15% above median its historical median of 73.84. Over the past decade, Butler National's Days Inventory has ranged from 70.47 to 91.79. According to the industry distribution chart, Butler National ranks #101 out of 329 companies in the Aerospace & Defense industry, placing it in the top 30.7%.
Is Butler National's Days Inventory too high?
Butler National's current Days Inventory of 85.06 is 15% above median its 10-year median of 73.84. Over the past 10 years, this metric has ranged from a low of 70.47 to a high of 91.79. The Aerospace & Defense industry median Days Inventory is 139.44. Butler National's value of 85.06 is 39% below this industry median. Based on the distribution chart, Butler National ranks #101 out of 329 companies in the Aerospace & Defense industry, which is above the industry midpoint. Overall, Butler National has a GF Score™ of 72/100 and is considered Significantly Overvalued, reflecting its overall financial health beyond just this single metric.
How does Butler National's Days Inventory compare to SPCE and MRLN?
According to the Aerospace & Defense industry distribution chart, Butler National ranks #101 out of 329 companies for Days Inventory. This puts Butler National in the upper half of its industry. The industry median Days Inventory is 139.44. Butler National's value of 85.06 is 39% below this benchmark. Historically, Butler National's own Days Inventory has ranged from 70.47 to 91.79 over the past decade. While the company's 10-year median is 73.84 vs. the industry median of 139.44, Butler National has consistently been below 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 Aerospace & Defense company?
The median Days Inventory among Aerospace & Defense companies is 139.44, based on 329 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. Butler National's current Days Inventory of 85.06 is 39% below 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 Butler National and its competitors. For the Aerospace & Defense industry, the median Days Inventory is 139.44 — values significantly above this may indicate overvaluation, while values below may suggest a bargain or underlying issues. Butler National's current Days Inventory is 85.06, which is 15% above median its own 10-year median of 73.84. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Butler National stock overvalued right now?
Based on GuruFocus' analysis, Butler National (BUKS) is currently considered Significantly Overvalued. The stock's GF Value™ is $1.87, compared to a current price of $4.80 — trading 156.7% above its estimated fair value. The current Days Inventory is 85.06, which is 15% above median its 10-year median of 73.84 and 39% below the Aerospace & Defense industry median of 139.44. Butler National's overall GF Score™ is 72/100 with 4 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 Butler National (BUKS), the current Days Inventory is 85.06 as of Apr. 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 Butler National (BUKS) Overvalued in 2026?
Based on GuruFocus' analysis, Butler National stock appears to be overvalued.
The current stock price of $4.80 is trading 156.7% above its estimated GF Value™ of $1.87.
GuruFocus considers Butler National to be Significantly Overvalued.
Key valuation signals for BUKS:
Days Inventory: 85.06 (15% above median its 10-year median of 73.84)
GF Value™: $1.87 vs. price of $4.80 (156.7% above fair value)
Industry Position: 39% below the Aerospace & Defense median (#101 of 329)
No single metric tells the full story. See the BUKS stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.
Butler National Corp is involved in the design, engineering, manufacturing, selling, integrating, installing, repairing, modifying, overhauling, servicing, and distributing portfolio of aerostructures, aircraft components, avionics, accessories, subassemblies, and systems (Aerospace Products). The group serves the aviation industry, including owners of aircraft and contractors involved with private, commercial, business, and government aircraft operations. It also serves commercial weapon manufacturers and suppliers to governments and their agencies. The company has two operating segments: Professional Services and Aerospace Products. Its main source of revenue comes from the Aerospace Products segment. It operates in North America, Europe, Asia, Australia, and other geographical regions.
72GF Score
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