FAST (Fastenal Co) Change In Inventory: $-10 Mil (TTM As of Mar. 2026)


FAST Fastenal Co FAST
99 GF Score
Price $48.57
GF Value $43.33
Valuation Modestly Overvalued
! 3 Warning Signs
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What is Fastenal Co Change In Inventory?

Fastenal Co FAST +1.76% 99 Change In Inventory is $-10 Mil as of Mar. 2026. GuruFocus rates FAST with a GF Score™ of 99/100 and a GF Value™ of $43.33 (Modestly Overvalued). The stock has 3 warning signs investors should review.

Fastenal Co's change in inventory for the quarter that ended in Mar. 2026 was $53 Mil. It means Fastenal Co's inventory declined by $53 Mil from Dec. 2025 to Mar. 2026 .

Fastenal Co's change in inventory for the fiscal year that ended in Dec. 2025 was $-89 Mil. It means Fastenal Co's inventory increased by $89 Mil from Dec. 2024 to Dec. 2025 .

Fastenal Co's Total Inventories for the quarter that ended in Mar. 2026 was $1,693 Mil.

Days Inventory indicates the number of days of goods in sales that a company has in the inventory. Fastenal Co's Days Inventory for the quarter that ended in Mar. 2026 was 128.79.

Inventory Turnover measures how fast the company turns over its inventory within a year. Fastenal Co's Inventory Turnover for the quarter that ended in Mar. 2026 was 0.71.

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. Fastenal Co's Inventory-to-Revenue for the quarter that ended in Mar. 2026 was 0.78.


Fastenal Co  (NAS:FAST) Change In Inventory Explanation

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

Fastenal Co's Days Inventory for the quarter that ended in is calculated as:

Days Inventory=Average Total Inventories/Cost of Goods Sold*Days in Period
=1720.25/1218.8*365 / 4
=128.79

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

Fastenal Co's Inventory Turnover for the quarter that ended in Mar. 2026 is calculated as

3. 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.

Fastenal Co's Inventory to Revenue for the quarter that 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.


Fastenal Co Change In Inventory Related Terms


Fastenal Co Change In Inventory Historical Data

* Premium members only.

The historical data trend for Fastenal Co's Change In 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.

Fastenal Co Change In Inventory Chart

Fastenal Co Annual Data
Trend Dec16 Dec17 Dec18 Dec19 Dec20 Dec21 Dec22 Dec23 Dec24 Dec25
Change In Inventory
Get a 7-Day Free Trial Premium Member Only Premium Member Only -189.50 -198.00 189.10 -133.90 -89.20

Fastenal Co Quarterly Data
Jun21 Sep21 Dec21 Mar22 Jun22 Sep22 Dec22 Mar23 Jun23 Sep23 Dec23 Mar24 Jun24 Sep24 Dec24 Mar25 Jun25 Sep25 Dec25 Mar26
Change In 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 -26.50 -41.20 1.40 -22.90 52.50
FAST
99GF Score
Fastenal Co FAST
Change In Inventory is just one metric. See GF Score™, valuation, warning signs, and more.
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Fastenal Co Change In Inventory Calculation

Change In Inventory is the difference between last period's ending inventory and the current period's ending inventory.

Change In Inventory for the trailing twelve months (TTM) ended in Mar. 2026 adds up the quarterly data reported by the company within the most recent 12 months, which was $-10 Mil.

* 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 Change In Inventory →
What does a Change In Inventory of $-10 Mil mean?
Fastenal Co (FAST) has a Change In Inventory of $-10 Mil as of Mar. 2026. Change in Inventory is the difference between current-period inventory and past-period inventory. View historical data for Fastenal Co and its competitors.
Is Fastenal Co's Change In Inventory too high?
Fastenal Co's current Change In Inventory is $-10 Mil. Overall, Fastenal Co has a GF Score™ of 99/100 and is considered Modestly Overvalued, reflecting its overall financial health beyond just this single metric.
How does Fastenal Co's Change In Inventory compare to FERG and GWW?
Fastenal Co's Change In Inventory of $-10 Mil can be compared against companies in the Industrial Distribution industry. See the competitive comparison table and distribution chart on this page for a detailed peer-by-peer breakdown.
What is a good Change In Inventory for an Industrial Distribution company?
A good Change In Inventory depends on the Industrial Distribution industry context. However, Change In Inventory 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 Change In Inventory mean?
A high Change In Inventory can signal that a stock is expensive relative to its fundamentals. Change in Inventory is the difference between current-period inventory and past-period inventory. View historical data for Fastenal Co and its competitors. Fastenal Co's current Change In Inventory is $-10 Mil. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Fastenal Co stock overvalued right now?
Based on GuruFocus' analysis, Fastenal Co (FAST) is currently considered Modestly Overvalued. The stock's GF Value™ is $43.33, compared to a current price of $48.57 — trading 12.1% above its estimated fair value. The current Change In Inventory is $-10 Mil. Fastenal Co's overall GF Score™ is 99/100 with 3 warning signs to review. Investors should evaluate multiple metrics — including profitability, growth, and financial strength — before making a decision.
How is Change In Inventory calculated?
Change In Inventory is calculated from a company's financial statements. For Fastenal Co (FAST), the current Change In Inventory is $-10 Mil 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 Fastenal Co (FAST) Overvalued in 2026?

Based on GuruFocus' analysis, Fastenal Co stock appears to be overvalued. The current stock price of $48.57 is trading 12.1% above its estimated GF Value™ of $43.33. GuruFocus considers Fastenal Co to be Modestly Overvalued.

Key valuation signals for FAST:

  • Change In Inventory: $-10 Mil
  • GF Value™: $43.33 vs. price of $48.57 (12.1% above fair value)
  • GF Score™: 99/100 with 3 warning signs

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


Fastenal Co Business Description

Address 2001 Theurer Boulevard, Winona, MN, USA, 55987-1500
Fastenal began as an industrial retailer, expanding its product portfolio from nuts and bolts to cutting tools, safety equipment, and janitorial supplies. It transitioned into a distributor by building out a dense network of branches close to its business customers. Once a customer becomes large enough, Fastenal installs vending machines and its own personnel on-site. Today, these on-site locations exceed Fastenal's branch count and remain the firm's main focus for expansion. Fastenal acts as a one-stop outsourcing partner for its industrial customers, offering value-added services along with a wide breadth of maintenance, repair, and operations supplies.
99GF Score

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

$48.57
Price
$43.33
GF Value