Plug PowerWBO:PLUG -1.73%28 Days Inventory is 253.98 as of Mar. 2026, which is 81% above its 10-year median of 140.13. GuruFocus rates WBO:PLUG with a GF Score™ of 28/100 and a GF Value™ of €1.24 (Significantly Overvalued). The stock has 6 warning signs investors should review. Among 2,968 Industrial Products companies, Plug Power ranks worse than 81.97% on this metric.
Days Inventory is also known as Days Sales of Inventory (DSI). Plug Power's Average Total Inventories for the
three
months ended in Mar. 2026 was €445.7 Mil. Plug Power's Cost of Goods Sold for the
three
months ended in Mar. 2026 was €160.1 Mil.
Hence, Plug Power's Days Inventory for the
three
months ended in Mar. 2026 was 253.98.
The historical rank and industry rank for Plug Power's Days Inventory or its related term are showing as below:
WBO:PLUG'
s Days Inventory Range Over the Past 10 Years
Min: 88.13 Med: 140.13 Max: 239.3
Current: 230.07
During the past 13 years, Plug Power's highest Days Inventory was 239.30. The lowest was 88.13. And the median was 140.13.
WBO:PLUG's Days Inventory is ranked worse than 81.97% of 2968
companies
in the Industrial Products industry
Industry Median: 119.47
vs WBO:PLUG: 230.07
Plug Power's Days Inventory
declined
from Mar. 2025 (307.40) to Mar. 2026 (253.98).
Inventory Turnover measures how fast the company turns over its inventory within a year.
Plug Power's Inventory Turnover for the
three
months ended in Mar. 2026 was 0.36.
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.
Plug Power's Inventory-to-Revenue for the
three
months ended in Mar. 2026 was 3.15.
Plug Power (WBO:PLUG) 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.
Plug Power'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.
Plug Power'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.
Plug Power Days Inventory Related Terms
Plug Power Days Inventory Historical Data
* Premium members only.
The historical data trend for Plug Power'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.
WBO:PLUG vs HAYW, ATKR, TE: Days Inventory Comparison
For the Electrical Equipment & Parts subindustry, Plug Power'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.
Plug Power Days Inventory vs Industrial Products Industry
For the Industrial Products industry and Industrials sector, Plug Power's Days Inventory distribution charts can be found below:
* The bar in red indicates where Plug Power'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.
Plug Power (WBO:PLUG) has a Days Inventory of 253.98 as of Mar. 2026. Days inventory represents the average amount of days a company holds inventory before selling it. View historical data on Plug Power and its competitors. This is 81% above median its historical median of 140.13. Over the past decade, Plug Power's Days Inventory has ranged from 88.13 to 239.30. According to the industry distribution chart, Plug Power ranks #2433 out of 2968 companies in the Industrial Products industry, placing it in the top 82%.
Is Plug Power's Days Inventory too high?
Plug Power's current Days Inventory of 253.98 is 81% above median its 10-year median of 140.13. Over the past 10 years, this metric has ranged from a low of 88.13 to a high of 239.30. The Industrial Products industry median Days Inventory is 119.47. Plug Power's value of 253.98 is 112.6% above this industry median. Based on the distribution chart, Plug Power ranks #2433 out of 2968 companies in the Industrial Products industry, which is in the bottom quartile relative to peers. Overall, Plug Power has a GF Score™ of 28/100 and is considered Significantly Overvalued, reflecting its overall financial health beyond just this single metric.
How does Plug Power's Days Inventory compare to HAYW and ATKR?
According to the Industrial Products industry distribution chart, Plug Power ranks #2433 out of 2968 companies for Days Inventory. This places Plug Power in the lower half of its industry. The industry median Days Inventory is 119.47. Plug Power's value of 253.98 is 112.6% above this benchmark. Historically, Plug Power's own Days Inventory has ranged from 88.13 to 239.30 over the past decade. While the company's 10-year median is 140.13 vs. the industry median of 119.47, Plug Power 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 2,968 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. Plug Power's current Days Inventory of 253.98 is 112.6% 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 Plug Power 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. Plug Power's current Days Inventory is 253.98, which is 81% above median its own 10-year median of 140.13. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Plug Power stock overvalued right now?
Based on GuruFocus' analysis, Plug Power (WBO:PLUG) is currently considered Significantly Overvalued. The stock's GF Value™ is €1.24, compared to a current price of €2.19 — trading 76.9% above its estimated fair value. The current Days Inventory is 253.98, which is 81% above median its 10-year median of 140.13 and 112.6% above the Industrial Products industry median of 119.47. Plug Power's overall GF Score™ is 28/100 with 6 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 Plug Power (WBO:PLUG), the current Days Inventory is 253.98 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 Plug Power (WBO:PLUG) Overvalued in 2026?
Based on GuruFocus' analysis, Plug Power stock appears to be overvalued.
The current stock price of €2.19 is trading 76.9% above its estimated GF Value™ of €1.24.
GuruFocus considers Plug Power to be Significantly Overvalued.
Key valuation signals for WBO:PLUG:
Days Inventory: 253.98 (81% above median its 10-year median of 140.13)
GF Value™: €1.24 vs. price of €2.19 (76.9% above fair value)
Industry Position: 112.6% above the Industrial Products median (#2433 of 2968)
No single metric tells the full story. See the WBO:PLUG stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.
Plug Power Inc is building an end-to-end green hydrogen ecosystem, from production, storage, and delivery to energy generation. The company plans to build and operate green hydrogen highways across North America and Europe. Plug will deliver its green hydrogen solutions directly to its customers and through joint venture partners into multiple end markets, including material handling, e-mobility, power generation, and industrial applications.
28GF Score
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