Financial Results for Fiscal Q1 Ended September 30, 2023

• Revenue was $180.6 million, an increase of 11.8% from the prior quarter and a decrease of 13.4% from the same quarter last year.

• GAAP gross margin was 28.2%, up from 27.6% in the prior quarter and down from 34.1% in the same quarter last year.

• Non-GAAP gross margin was 28.8%, up from 28.5% in the prior quarter and down from 35.4% in the same quarter last year.

• GAAP operating expenses were $41.5 million, down from $42.0 million in the prior quarter and down from $45.6 million in the same quarter last year.

• Non-GAAP operating expenses were $40.8 million, up from $39.1 million from last quarter and up from $36.6 million in the same quarter last year.

• GAAP operating income was $9.4 million, up from $2.6 million of operating income in the prior quarter and down from $25.5 million of operating income in the same quarter last year.

• Non-GAAP operating income was $11.2 million as compared to $6.9 million of operating income for the prior quarter and $37.1 million of operating income for the same quarter last year.

• GAAP net income per diluted share was $0.19, compared to $0.04 net loss per share for the prior quarter, and $0.88 net income per share for the same quarter a year ago.

• Non-GAAP net income per share was $0.33 compared to $0.19 net income per share for the prior quarter and $1.20 net income per share for the same quarter a year ago.

• Consolidated cash flow provided by operating activities was $13.8 million, as compared to negative $28.2 million in the prior quarter.

• The Company closed the quarter with $193.6 million of cash and cash equivalents.

AOS Chief Executive Officer Stephen Chang commented, “We delivered solid fiscal Q1 results driven by an encouraging rebound in PC and smartphone shipments for fall device launches and the holiday season. Looking forward, we remain cautious about a sustained broader recovery as we are seeing signs of demand constraints in other end markets, which are affected by the persistent high-interest rate environment and geopolitical uncertainties.”

Mr. Chang continued, “Despite ongoing market challenges, we are focused on positioning AOS towards long-term growth by extending the reach of our business into new applications and broadening our product portfolio to address increasing global power trends. We also aim to deepen our penetration in our core markets with integrated solutions and drive higher BOM content. We believe the fundamentals of our business remain strong driven by record Tier 1 customer partnerships and market share across many of our end markets and we continue to expect to navigate the current environment better than the broader market that we serve.”

Business Outlook for Fiscal Q2 Ending December 31, 2023

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 2024 are as follows:

• Revenue to be approximately $165 million, plus or minus $10 million.

• GAAP gross margin to be 27.1%, plus or minus 1%. We anticipate non-GAAP gross margin to be 28.5%, plus or minus 1%.

• GAAP operating expenses to be in the range of $48.0 million, plus or minus $1 million. Non-GAAP operating expenses are expected to be in the range of $40.3 million, plus or minus $1 million.

• Interest expense to be approximately $1.1 million, and

• Income tax expense to be in the range of $0.8 million to $1.2 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, 2023 today, November 6, 2023 at 2:00 p.m. PT / 5:00 p.m. ET. To listen to the live conference call, please dial +1 (833) 470-1428 or +1 (404) 975-4839 if dialing from outside the United States and Canada. The access code is 198548. 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. The webcast replay will be available for seven days after the live call on the same website. 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, market trends in the semiconductor industry; our ability to mitigate economic downturns; seasonality of our business, our ability to penetrate new markets and achieve long-term growth, our annual revenue target, projected amount of revenue, gross margin, operating income (loss), income tax expenses, net income (loss), and share-based compensation expenses, non-GAAP gross margin, non-GAAP operating expenses, income tax expenses, our ability to continue to win and acquire market share and other information under the section entitled “Business Outlook for Fiscal Q2 Ending December 31, 2023”. 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 state of semiconductor industry and seasonality of our markets; government policies on our business operations in China; our lack of control over the joint venture in China; difficulties and challenges in executing our diversification strategy into different market segments; 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; 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, 2023 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.

Use of Non-GAAP Financial Measures

To supplement our unaudited consolidated financial statements presented on a basis consistent with U.S. GAAP, we disclose certain non-GAAP financial measures for our historical performance, including non-GAAP gross profit, gross margin, operating expenses, operating income (loss), net income (loss), diluted earnings per share ("EPS") and EBITDAS. These supplemental measures exclude, among other items, share-based compensation expenses, legal and profession fees related to government investigation, amortization of purchased intangible, income tax effect of non-GAAP adjustments and equity method investment (loss) income from equity investee. We also disclose certain non-GAAP financial measures in our guidance for the next quarter, including non-GAAP gross margin and operating expenses. We believe that these historical and forecast non-GAAP financial measures provide useful information to both management and investors by excluding certain items and expenses that are not indicative of our core operating results or do not reflect our normal business operations. In addition, our management uses non-GAAP measures to compare our performance relative to forecasts and to benchmark our performance externally against competitors. Our use of non-GAAP financial measures has certain limitations in that such non-GAAP financial measures may not be directly comparable to those reported by other companies. For example, the terms used in this press release, such as non-GAAP net income (loss) or non-GAAP operating expenses, do not have a standardized meaning. Other companies may use the same or similarly named measures, but exclude different items, which may not provide investors with a comparable view of our performance in relation to other companies. In addition, we included the amount of income tax effect of non-GAAP adjustments in the non-GAAP net income (loss) of reconciliation table for all periods presented as the management believes that such non-GAAP presentation provides useful information to investors, even though the amounts are not significant. We seek to compensate for the limitation of our non-GAAP presentation by providing a detailed reconciliation of the non-GAAP financial measures to the most directly comparable U.S. GAAP measures both in the text in this press release and in the tables attached hereto. Investors are encouraged to review the related U.S. GAAP financial measures and the reconciliation of these non-GAAP financial measures to their most directly comparable U.S. GAAP financial measures.