Axcelis TechnologiesACLS -1.32%85 Days Inventory is 252.48 as of Mar. 2026, which is 39% above its 10-year median of 181.98. GuruFocus rates ACLS with a GF Score™ of 85/100 and a GF Value™ of $87.50 (Significantly Overvalued). The stock has 8 warning signs investors should review. Among 983 Semiconductors companies, Axcelis Technologies ranks worse than 84.44% on this metric.
The historical rank and industry rank for Axcelis Technologies's Days Inventory or its related term are showing as below:
ACLS'
s Days Inventory Range Over the Past 10 Years
Min: 154.04 Med: 181.98 Max: 247.27
Current: 242.84
During the past 13 years, Axcelis Technologies's highest Days Inventory was 247.27. The lowest was 154.04. And the median was 181.98.
ACLS's Days Inventory is ranked worse than 84.44% of 983
companies
in the Semiconductors industry
Industry Median: 111.84
vs ACLS: 242.84
Axcelis Technologies's Days Inventory
declined
from Mar. 2025 (254.10) to Mar. 2026 (252.48).
Inventory Turnover measures how fast the company turns over its inventory within a year.
Axcelis Technologies'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.
Axcelis Technologies's Inventory-to-Revenue for the
three
months ended in Mar. 2026 was 1.65.
Axcelis Technologies (NAS:ACLS) 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.
Axcelis 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.
Axcelis 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.
Axcelis Technologies Days Inventory Related Terms
Axcelis Technologies Days Inventory Historical Data
* Premium members only.
The historical data trend for Axcelis 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.
ACLS vs IPGP, KLIC, UCTT: Days Inventory Comparison
For the Semiconductor Equipment & Materials subindustry, Axcelis 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.
Axcelis Technologies Days Inventory vs Semiconductors Industry
For the Semiconductors industry and Technology sector, Axcelis Technologies's Days Inventory distribution charts can be found below:
* The bar in red indicates where Axcelis Technologies'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.
Axcelis Technologies (ACLS) has a Days Inventory of 252.48 as of Mar. 2026. Days inventory represents the average amount of days a company holds inventory before selling it. View historical data on Axcelis Technologies and its competitors. This is 39% above median its historical median of 181.98. Over the past decade, Axcelis Technologies' Days Inventory has ranged from 154.04 to 247.27. According to the industry distribution chart, Axcelis Technologies ranks #830 out of 983 companies in the Semiconductors industry, placing it in the top 84.4%.
Is Axcelis Technologies' Days Inventory too high?
Axcelis Technologies' current Days Inventory of 252.48 is 39% above median its 10-year median of 181.98. Over the past 10 years, this metric has ranged from a low of 154.04 to a high of 247.27. The Semiconductors industry median Days Inventory is 111.84. Axcelis Technologies' value of 252.48 is 125.8% above this industry median. Based on the distribution chart, Axcelis Technologies ranks #830 out of 983 companies in the Semiconductors industry, which is in the bottom quartile relative to peers. Overall, Axcelis Technologies has a GF Score™ of 85/100 and is considered Significantly Overvalued, reflecting its overall financial health beyond just this single metric.
How does Axcelis Technologies' Days Inventory compare to IPGP and KLIC?
According to the Semiconductors industry distribution chart, Axcelis Technologies ranks #830 out of 983 companies for Days Inventory. This places Axcelis Technologies in the lower half of its industry. The industry median Days Inventory is 111.84. Axcelis Technologies' value of 252.48 is 125.8% above this benchmark. Historically, Axcelis Technologies' own Days Inventory has ranged from 154.04 to 247.27 over the past decade. While the company's 10-year median is 181.98 vs. the industry median of 111.84, Axcelis 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 Semiconductors company?
The median Days Inventory among Semiconductors companies is 111.84, based on 983 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. Axcelis Technologies's current Days Inventory of 252.48 is 125.8% 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 Axcelis Technologies and its competitors. For the Semiconductors industry, the median Days Inventory is 111.84 — values significantly above this may indicate overvaluation, while values below may suggest a bargain or underlying issues. Axcelis Technologies's current Days Inventory is 252.48, which is 39% above median its own 10-year median of 181.98. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Axcelis Technologies stock overvalued right now?
Based on GuruFocus' analysis, Axcelis Technologies (ACLS) is currently considered Significantly Overvalued. The stock's GF Value™ is $87.50, compared to a current price of $168.91 — trading 93% above its estimated fair value. The current Days Inventory is 252.48, which is 39% above median its 10-year median of 181.98 and 125.8% above the Semiconductors industry median of 111.84. Axcelis Technologies' overall GF Score™ is 85/100 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 Axcelis Technologies (ACLS), the current Days Inventory is 252.48 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 Axcelis Technologies (ACLS) Overvalued in 2026?
Based on GuruFocus' analysis, Axcelis Technologies stock appears to be overvalued.
The current stock price of $168.91 is trading 93% above its estimated GF Value™ of $87.50.
GuruFocus considers Axcelis Technologies to be Significantly Overvalued.
Key valuation signals for ACLS:
Days Inventory: 252.48 (39% above median its 10-year median of 181.98)
GF Value™: $87.50 vs. price of $168.91 (93% above fair value)
Industry Position: 125.8% above the Semiconductors median (#830 of 983)
No single metric tells the full story. See the ACLS stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.
Axcelis Technologies Inc designs, manufactures, and services ion implantation and other processing equipment used in the fabrication of semiconductor chips. In addition to equipment, the company provides aftermarket lifecycle products and services, including used tools, spare parts, equipment upgrades, maintenance services, and customer training. Geographically, the group has a business presence in North America, Asia Pacific, and Europe, of which key revenue is derived from the Asia Pacific.
85GF Score
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