Financial Results for Fiscal Q1 Ended September 30, 2020

• Revenue was $151.6 million, an increase of 23.8% from the prior quarter and an increase of 28.6% from the same quarter last year.
• GAAP gross margin was 28.1%, up from 23.6% in the prior quarter and up from 22.9% in the same quarter last year.
• Non-GAAP gross margin was 29.0%, up from 27.5% in the prior quarter and up from 28.3% in the same quarter last year.
• GAAP operating expenses were $32.2 million, up from $30.3 million in the prior quarter and up from $27.6 in the same quarter last year.
• Non-GAAP operating expenses were $28.6 million, an increase of $3.3 million from last quarter and an increase of $3.0 million from the same quarter last year.
• GAAP operating income was $10.3 million, up from $1.3 million loss in the prior quarter and up from $0.6 million loss in the same quarter last year.
• Non-GAAP operating income was $15.4 million as compared to $8.4 million for the prior quarter and $7.7 million for the same quarter last year.
• GAAP net income per share attributable to AOS was $0.36, compared to $0.00 for the prior quarter and $0.04 for the same quarter a year ago.
• Non-GAAP earnings per share attributable to AOS was $0.55 compared to $0.29 for the prior quarter and $0.26 for the same quarter a year ago.
• Consolidated cash flow provided by operating activities was $9.8 million, compared to $40.3 million in the prior quarter. Operating cash flow provided by AOS alone (excluding the JV Company) was $12.7 million, compared to $20.2 million in the prior quarter.
• The Company closed the quarter with $154.7 million of cash and cash equivalents, including $42.0 million cash balance at the JV Company.

AOS Chairman and Chief Executive Officer Dr. Mike Chang commented, “Business momentum accelerated in the September quarter despite the ongoing global uncertainty with the COVID-19 pandemic. We delivered solid revenue growth and robust bottom line performance. Shipments were strong across most of our product categories, particularly computing and consumer applications. Our technical expertise enables us to develop a broader variety of power discrete and power IC technology platforms and to deliver complete power solutions for more target applications. Over the years, we have evolved from a component supplier to a solution provider. We have engaged more deeply with our customers, strengthened relationships, and become their strategic partner.”

Dr. Chang continued, "We are pleased with our direction and excited about our growth trajectory. We have a strong pipeline of new products, new customers, and new design wins. We are focused on executing our growth strategy and building on the strong momentum as we continue our mission to become a leading designer, developer, and global supplier of a broad portfolio of power semiconductors. That being said, the environment in which we are operating remains highly uncertain. We are working diligently to drive growth, but are prepared to respond quickly should conditions change due to the COVID-19 pandemic, the economy, trade tensions, or other issues."

Business Outlook for Fiscal Q2 Ending December 31, 2020

The following statements are based on management's current expectations. These statements are forward-looking, and actual results may differ materially. AOS undertakes no obligation to update these statements.

Our expectations for the second quarter of fiscal year 2021 are as follows:

• Revenue is expected to be approximately $153 million, plus or minus $3 million.
• GAAP gross margin is expected to be approximately 28.0% plus or minus 1%. Non-GAAP gross margin is expected to be approximately 29.0% plus or minus 1%. Note that non-GAAP gross margin excludes $0.8 million amortization of acquired IP, $0.4 million of estimated share-based compensation and $0.4 million of estimated production ramp-up costs relating to the JV Company.
• GAAP operating expenses are expected to be in the range of $32.6 million plus or minus $1 million. Non-GAAP operating expenses are expected to be in the range of $28.6 million plus or minus $1 million. Non-GAAP operating expenses exclude $2.5 million of estimated share-based compensation charge and $1.5 million of estimated professional fees related to the government investigation.
• Income tax expense is expected to be approximately $0.8 million to $1.2 million.
• Loss attributable to noncontrolling interest is expected to be approximately $1.4 million. On a non-GAAP basis, excluding estimated production ramp-up costs relating to the JV Company, this item is expected to be approximately $1.0 million.

Conference Call and Webcast

AOS plans to hold an investor teleconference and live webcast to discuss the financial results for the fiscal first quarter ended September 30, 2020 today, November 5, 2020 at 2:00 p.m. PT / 5:00 p.m. ET. To participate in the live call, register in advance to join the conference call using the link provided below and dial in 10 minutes before the call is scheduled to begin. Conference call access information will be provided upon registration (Participant Online Registration: http://www.directeventreg.com/registration/event/2647139). In addition, a copy of the script of management's prepared remarks and a live webcast of the call will also be available in the "Events & Presentations" section of the company's investor relations website, http://investor.aosmd.com.

Forward-Looking Statements

This press release contains forward-looking statements that are based on current expectations, estimates, forecasts and projections of future performance based on management's judgment, beliefs, current trends, and anticipated product performance. These forward-looking statements include, without limitation, statements relating to expected growth rate, our product portfolios, projected amount of revenue, gross margin, operating income (loss), income tax expenses, net income (loss), noncontrolling interest, and share-based compensation expenses, non-GAAP gross margin, non-GAAP operating expenses, tax expenses, and non-GAAP loss attributable to noncontrolling interest, impact of COVID-19 pandemic and related economic trends and our responses to such impact, our ability to execute growth strategies and achieve business objectives, our ability to support our customers, our ability to respond to trade tension and general economic conditions, and other information under the section entitled “Business Outlook for Fiscal Q2 Ending December 31, 2020”. Forward-looking statements involve risks and uncertainties that may cause actual results to differ materially from those contained in the forward-looking statements. These factors include, but are not limited to, the impact of COVID-19 pandemic on our business; our ability to successfully operate our joint venture in China; our ability to develop and succeed in the digital power business; difficulties and challenges in executing our diversification strategy into different market segments; new tariffs on goods from China; ordering pattern from distributors and seasonality; changes in regulatory environment and government investigation; our ability to introduce or develop new and enhanced products that achieve market acceptance; decline of PC markets; the actual product performance in volume production; the quality and reliability of our product, our ability to achieve design wins; the general business and economic conditions; the state of semiconductor industry and seasonality of our markets; our ability to maintain factory utilization at a desirable level; and other risks as described in our SEC filings, including our Annual Report on Form 10-K for the fiscal year ended June 30, 2020 filed by AOS with the SEC and other periodic reports we filed with the SEC. Other unknown or unpredictable factors or underlying assumptions subsequently proving to be incorrect could cause actual results to differ materially from those in the forward-looking statements. Although we believe that the expectations reflected in the forward-looking statements are reasonable, we cannot guarantee future results, level of activity, performance, or achievements. You should not place undue reliance on these forward-looking statements. All information provided in this press release is as of today's date, unless otherwise stated, and AOS undertakes no duty to update such information, except as required under applicable law.