Sino-American Silicon Products (LUX:SIAMS) Operating Income: $347 Mil (TTM As of Dec. 2025)

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LUX:SIAMS Sino-American Silicon Products Inc LUX:SIAMS
81 GF Score
Price $7.15
GF Value $5.32
! 9 Warning Signs
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What is Sino-American Silicon Products Operating Income?

Sino-American Silicon Products LUX:SIAMS 81 Operating Income is $347 Mil as of Dec. 2025. GuruFocus rates LUX:SIAMS with a GF Score™ of 81/100 and a GF Value™ of $5.32. The stock has 9 warning signs investors should review.

Sino-American Silicon Products's Operating Income for the three months ended in Dec. 2025 was $107 Mil. Its Operating Income for the trailing twelve months (TTM) ended in Dec. 2025 was $347 Mil.

Operating Margin % is calculated as Operating Income divided by its Revenue. Sino-American Silicon Products's Operating Income for the three months ended in Dec. 2025 was $107 Mil. Sino-American Silicon Products's Revenue for the three months ended in Dec. 2025 was $621 Mil. Therefore, Sino-American Silicon Products's Operating Margin % for the quarter that ended in Dec. 2025 was 17.23%.

Warning Sign:

Sino-American Silicon Products Inc operating margin has been in a 5-year decline. The average rate of decline per year is -10.6%.

Sino-American Silicon Products's 5-Year average Growth Rate for Operating Margin % was -10.60% per year.

Operating Income or EBIT is linked to Return on Capital for both regular definition and Joel Greenblatt's definition. Sino-American Silicon Products's annualized ROC % for the quarter that ended in Dec. 2025 was 4.75%. Sino-American Silicon Products's annualized ROC (Joel Greenblatt) % for the quarter that ended in Dec. 2025 was 13.15%.


Sino-American Silicon Products  (LUX:SIAMS) Operating Income Explanation

1. Operating Income or EBIT is linked to Return on Capital for both regular definition and Joel Greenblatt's definition.

Sino-American Silicon Products's annualized ROC % for the quarter that ended in Dec. 2025 is calculated as:

ROC % (Q: Dec. 2025 )
=NOPAT/Average Invested Capital
=Operating Income * ( 1 - Tax Rate % )/( (Invested Capital (Q: Sep. 2025 ) + Invested Capital (Q: Dec. 2025 ))/ count )
=428.384 * ( 1 - 19.37% )/( (7687.866 + 6858.727)/ 2 )
=345.4060192/7273.2965
=4.75 %

where

Invested Capital(Q: Sep. 2025 )
=Total Assets - Accounts Payable & Accrued Expense - Excess Cash
=Total Assets - Accounts Payable & Accrued Expense - ( Cash, Cash Equivalents, Marketable Securities - max(0, Total Current Liabilities - Total Current Assets+Cash, Cash Equivalents, Marketable Securities))
=8710.607 - 394.402 - ( 2077.37 - max(0, 2411.997 - 3040.336+2077.37))
=7687.866

Invested Capital(Q: Dec. 2025 )
=Total Assets - Accounts Payable & Accrued Expense - Excess Cash
=Total Assets - Accounts Payable & Accrued Expense - ( Cash, Cash Equivalents, Marketable Securities - max(0, Total Current Liabilities - Total Current Assets+Cash, Cash Equivalents, Marketable Securities))
=8578.687 - 460.871 - ( 2540.42 - max(0, 2236.732 - 3495.821+2540.42))
=6858.727

Note: The Operating Income data used here is four times the quarterly (Dec. 2025) data.

2. Joel Greenblatt's definition of Return on Capital:

Sino-American Silicon Products's annualized ROC (Joel Greenblatt) % for the quarter that ended in Dec. 2025 is calculated as:

ROC (Joel Greenblatt) %(Q: Dec. 2025 )
=EBIT/Average of (Net fixed Assets + Net Working Capital)
=EBIT/Average of (Property, Plant and Equipment+Net Working Capital)
     Q: Sep. 2025  Q: Dec. 2025
=EBIT/( ( (Property, Plant and Equipment + Net Working Capital) + (Property, Plant and Equipment + Net Working Capital) )/ count )
=569.544/( ( (4601.963 + max(8.6290000000004, 0)) + (4051.514 + max(-12.253, 0)) )/ 2 )
=569.544/( ( 4610.592 + 4051.514 )/ 2 )
=569.544/4331.053
=13.15 %

where Working Capital is:

Working Capital(Q: Sep. 2025 )
=(Accounts Receivable + Total Inventories + Other Current Assets) - (Accounts Payable & Accrued Expense + Defer. Rev. + Other Current Liabilities)
=(440.851 + 422.349 + 99.766) - (394.402 + 0 + 559.935)
=8.6290000000004

Working Capital(Q: Dec. 2025 )
=(Accounts Receivable + Total Inventories + Other Current Assets) - (Accounts Payable & Accrued Expense + Defer. Rev. + Other Current Liabilities)
=(417.497 + 443.511 + 94.393) - (460.871 + 0 + 506.783)
=-12.253

When net working capital is negative, 0 is used.

Note: The EBIT data used here is four times the quarterly (Dec. 2025) EBIT data.

3. Operating Income is also linked to Operating Margin %:

Sino-American Silicon Products's Operating Margin % for the quarter that ended in Dec. 2025 is calculated as:

Operating Margin %=Operating Income (Q: Dec. 2025 )/Revenue (Q: Dec. 2025 )
=107.096/621.406
=17.23 %

* 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.

4. Please click Growth Rate Calculation Example (GuruFocus) to see how GuruFocus calculates Wal-Mart Stores Inc (WMT)'s revenue growth rate. You can apply the same method to get the Operating Income growth rate using Operating Income per share data.


Be Aware

Compared with a company's EBITDA margin, Operating Margin can be manipulated by adjusting the rate of depreciation, depletion and amortization (DDA).

If a company is facing competition, its Operating Margin may decline. Often the Operating Margin declines well before the company's revenue or even profit decline. Therefore, Operating Margin is a very important indicator of whether the company is facing problems.

For instance, by 2012, Nokia (NOK)'s problems were well known and its stock had lost more than 90% of its market value since 2007. But Nokia's Operating Margin had already been in decline since 2002, although its earnings per share were still rising. Investors who paid attention to Operating Margin would have avoided this huge loss. The same can be said for Research-in-Motion (RIMM).

Therefore, Operating Margin is a very important screening filter for GuruFocus. GuruFocus's Buffett-Munger screener requires that the profit margin is either consistent or expanding. The Model Portfolio of the Buffett-Munger screener has outperformed the market every year since inception in 2009.


Sino-American Silicon Products Operating Income Related Terms


Sino-American Silicon Products Operating Income Historical Data

* Premium members only.

The historical data trend for Sino-American Silicon Products's Operating Income 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.

Sino-American Silicon Products Operating Income Chart

Sino-American Silicon Products Annual Data
Trend Dec16 Dec17 Dec18 Dec19 Dec20 Dec21 Dec22 Dec23 Dec24 Dec25
Operating Income
Get a 7-Day Free Trial Premium Member Only Premium Member Only 651.56 829.02 595.95 494.65 344.19

Sino-American Silicon Products Quarterly Data
Mar21 Jun21 Sep21 Dec21 Mar22 Jun22 Sep22 Dec22 Mar23 Jun23 Sep23 Dec23 Mar24 Jun24 Sep24 Dec24 Mar25 Jun25 Sep25 Dec25
Operating Income 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 120.34 89.03 95.28 55.14 107.10
LUX:SIAMS
81GF Score
Sino-American Silicon Products Inc LUX:SIAMS
Operating Income is just one metric. See GF Score™, valuation, warning signs, and more.
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Sino-American Silicon Products Operating Income Calculation

Operating Income, is the profit a company earned through operations. All expenses, including cash expenses such as cost of goods sold (COGS), research & development, wages, and non-cash expenses, such as depreciation, depletion and amortization, have been deducted from the sales.

Operating Income for the trailing twelve months (TTM) ended in Dec. 2025 adds up the quarterly data reported by the company within the most recent 12 months, which was $347 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 Operating Income →
What does a Operating Income of $347 Mil mean?
Sino-American Silicon Products (LUX:SIAMS) has a Operating Income of $347 Mil as of Dec. 2025. Operating Income equals sales less all operating expenses. It is linked to EBIT. View historical data on Sino-American Silicon Products and its competitors.
Is Sino-American Silicon Products' Operating Income too high?
Sino-American Silicon Products' current Operating Income is $347 Mil. Overall, Sino-American Silicon Products has a GF Score™ of 81/100, reflecting its overall financial health beyond just this single metric.
How does Sino-American Silicon Products' Operating Income compare to AMAT and LRCX?
Sino-American Silicon Products' Operating Income of $347 Mil can be compared against companies in the Semiconductors industry. See the competitive comparison table and distribution chart on this page for a detailed peer-by-peer breakdown.
What is a good Operating Income for a Semiconductors company?
A good Operating Income depends on the Semiconductors industry context. However, Operating Income 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 Operating Income mean?
A high Operating Income can signal that a stock is expensive relative to its fundamentals. Operating Income equals sales less all operating expenses. It is linked to EBIT. View historical data on Sino-American Silicon Products and its competitors. Sino-American Silicon Products's current Operating Income is $347 Mil. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Sino-American Silicon Products stock overvalued right now?
Sino-American Silicon Products (LUX:SIAMS) has a current Operating Income of $347 Mil. The stock's GF Value™ is $5.32, compared to a current price of $7.15 — trading 34.4% above its estimated fair value. The current Operating Income is $347 Mil. Sino-American Silicon Products' overall GF Score™ is 81/100 with 9 warning signs to review. Investors should evaluate multiple metrics — including profitability, growth, and financial strength — before making a decision.
How is Operating Income calculated?
Operating Income is calculated from a company's financial statements. For Sino-American Silicon Products (LUX:SIAMS), the current Operating Income is $347 Mil as of Dec. 2025. 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 Sino-American Silicon Products (LUX:SIAMS) Overvalued in 2026?

Based on GuruFocus' analysis, Sino-American Silicon Products stock appears to be overvalued. The current stock price of $7.15 is trading 34.4% above its estimated GF Value™ of $5.32.

Key valuation signals for LUX:SIAMS:

  • Operating Income: $347 Mil
  • GF Value™: $5.32 vs. price of $7.15 (34.4% above fair value)
  • GF Score™: 81/100 with 9 warning signs

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


Sino-American Silicon Products Business Description

Other Exchanges 5483:Taiwan
Address Industrial East Road 2, No. 8, 4th Floor, Science Based Industrial Park, Hsinchu, TWN
Founded in 1981, Sino-American Silicon Products Inc. is a holding company specializing in the semiconductor industry. Its crown jewel is its 46.64% stake in silicon wafer producer GlobalWafers, which was carved out in 2011. GlobalWafers runs 18 production sites in nine countries across Asia, North America, and Europe. Other notable investments include Advanced Wireless Semiconductor Company, Actron Technology, and Taiwan Specialty Materials. SAS started selling renewable energy to power grids in October 2022. SAS is headquartered in Hsinchu, Taiwan. SAS employs about 8,000 people through its subsidiaries. Through GlobalWafers, SAS had nearly 17% market share in silicon wafers in 2025.
81GF Score

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

$7.15
Price
$5.32
GF Value