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Amkor TechnologySTU:AMK +6.29%73 Days Inventory is 29.25 as of Mar. 2026, which is 18% above its 10-year median of 24.86. GuruFocus rates STU:AMK with a GF Score™ of 73/100 and a GF Value™ of €28.38 (Significantly Overvalued). The stock has 6 warning signs investors should review. Among 983 Semiconductors companies, Amkor Technology ranks better than 92.47% on this metric.
The historical rank and industry rank for Amkor Technology's Days Inventory or its related term are showing as below:
STU:AMK'
s Days Inventory Range Over the Past 10 Years
Min: 22.48 Med: 24.86 Max: 35.3
Current: 24.54
During the past 13 years, Amkor Technology's highest Days Inventory was 35.30. The lowest was 22.48. And the median was 24.86.
STU:AMK's Days Inventory is ranked better than 92.47% of 983
companies
in the Semiconductors industry
Industry Median: 112.13
vs STU:AMK: 24.54
Amkor Technology's Days Inventory
increased
from Mar. 2025 (25.37) to Mar. 2026 (29.25).
It might indicate that Amkor Technology's sales slowed down.
Inventory Turnover measures how fast the company turns over its inventory within a year.
Amkor Technology's Inventory Turnover for the
three
months ended in Mar. 2026 was 3.12.
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.
Amkor Technology's Inventory-to-Revenue for the
three
months ended in Mar. 2026 was 0.28.
Amkor Technology (STU:AMK) 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.
Amkor Technology'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.
Amkor Technology'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.
Amkor Technology Days Inventory Related Terms
Amkor Technology Days Inventory Historical Data
* Premium members only.
The historical data trend for Amkor Technology'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.
STU:AMK vs ONTO, NVMI, ENTG: Days Inventory Comparison
For the Semiconductor Equipment & Materials subindustry, Amkor Technology'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.
Amkor Technology Days Inventory vs Semiconductors Industry
For the Semiconductors industry and Technology sector, Amkor Technology's Days Inventory distribution charts can be found below:
* The bar in red indicates where Amkor Technology'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.
Amkor Technology (STU:AMK) has a Days Inventory of 29.25 as of Mar. 2026. Days inventory represents the average amount of days a company holds inventory before selling it. View historical data on Amkor Technology and its competitors. This is 18% above median its historical median of 24.86. Over the past decade, Amkor Technology's Days Inventory has ranged from 22.48 to 35.30. According to the industry distribution chart, Amkor Technology ranks #74 out of 983 companies in the Semiconductors industry, placing it in the top 7.5%.
Is Amkor Technology's Days Inventory too high?
Amkor Technology's current Days Inventory of 29.25 is 18% above median its 10-year median of 24.86. Over the past 10 years, this metric has ranged from a low of 22.48 to a high of 35.30. The Semiconductors industry median Days Inventory is 112.13. Amkor Technology's value of 29.25 is 73.9% below this industry median. Based on the distribution chart, Amkor Technology ranks #74 out of 983 companies in the Semiconductors industry, which is in the top quartile — a strong position relative to peers. Overall, Amkor Technology has a GF Score™ of 73/100 and is considered Significantly Overvalued, reflecting its overall financial health beyond just this single metric.
How does Amkor Technology's Days Inventory compare to ONTO and NVMI?
According to the Semiconductors industry distribution chart, Amkor Technology ranks #74 out of 983 companies for Days Inventory. This places Amkor Technology in the top 8% of its industry — outperforming the majority of peers. The industry median Days Inventory is 112.13. Amkor Technology's value of 29.25 is 73.9% below this benchmark. Historically, Amkor Technology's own Days Inventory has ranged from 22.48 to 35.30 over the past decade. While the company's 10-year median is 24.86 vs. the industry median of 112.13, Amkor Technology 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 a Semiconductors company?
The median Days Inventory among Semiconductors companies is 112.13, 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. Amkor Technology's current Days Inventory of 29.25 is 73.9% 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 Amkor Technology and its competitors. For the Semiconductors industry, the median Days Inventory is 112.13 — values significantly above this may indicate overvaluation, while values below may suggest a bargain or underlying issues. Amkor Technology's current Days Inventory is 29.25, which is 18% above median its own 10-year median of 24.86. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Amkor Technology stock overvalued right now?
Based on GuruFocus' analysis, Amkor Technology (STU:AMK) is currently considered Significantly Overvalued. The stock's GF Value™ is €28.38, compared to a current price of €61.67 — trading 117.3% above its estimated fair value. The current Days Inventory is 29.25, which is 18% above median its 10-year median of 24.86 and 73.9% below the Semiconductors industry median of 112.13. Amkor Technology's overall GF Score™ is 73/100 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 Amkor Technology (STU:AMK), the current Days Inventory is 29.25 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 Amkor Technology (STU:AMK) Overvalued in 2026?
Based on GuruFocus' analysis, Amkor Technology stock appears to be overvalued.
The current stock price of €61.67 is trading 117.3% above its estimated GF Value™ of €28.38.
GuruFocus considers Amkor Technology to be Significantly Overvalued.
Key valuation signals for STU:AMK:
Days Inventory: 29.25 (18% above median its 10-year median of 24.86)
GF Value™: €28.38 vs. price of €61.67 (117.3% above fair value)
Industry Position: 73.9% below the Semiconductors median (#74 of 983)
No single metric tells the full story. See the STU:AMK stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.
Amkor Technology Inc is a OSAT (outsourced semiconductor assembly and test) service provider. It has pioneered the outsourcing of integrated circuit (IC) packaging and test services and is a strategic manufacturing partner for the semiconductor companies, foundries, and electronics original equipment manufacturers (OEMs). The firm's products are organized into two categories namely advanced products that include flip chip, fine pitch bumping, wafer-level processing, advanced SiPs, power modules, and others, and Mainstream products that includes wirebond packaging and testing. The company derives maximum revenue from the advanced products category. The company derives majority of its revenue from Foreign states.
73GF Score
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