Financial Results for Fiscal Q4 Ended June 30, 2023

• Revenue was $161.5 million, a decrease of 16.7% from the same quarter last year and an increase of 21.9% quarter-over-quarter.
• GAAP gross margin was 27.6%, down from 32.6% year-over-year and up from 23.2% in the prior quarter.
• Non-GAAP gross margin was 28.5%, down from 33.8% from the same quarter last year and up from 25.1% in the prior quarter.
• GAAP operating expenses were $42.0 million, down from $45.2 million in the prior quarter and down from $45.1 million from the same quarter last year.
• Non-GAAP operating expenses were $39.1 million, an increase of $2.9 million from last quarter and an increase of $2.4 million from the same quarter last year.
• GAAP operating income was $2.6 million, as compared to $18.1 million from the same quarter last year and an operating loss of $14.4 million in the prior quarter.
• Non-GAAP operating income was $6.9 million as compared to $28.9 million for the same quarter last year and an operating loss of $2.9 million from last quarter.
• GAAP net loss per share attributable to AOS was $0.04, compared to $0.68 for the prior quarter and $0.53 earnings per share for the same quarter last year.
• Non-GAAP earnings per share attributable to AOS was $0.19, compared to $0.95 for the same quarter last year and $0.21 net loss per share for the prior quarter.
• Consolidated cash flow used in operating activities was $28.2 million, as compared to $11.6 million of cash flow provided by operating activities in prior quarter.
• The Company closed the quarter with $195.2 million of cash and cash equivalents.

AOS Chief Executive Officer Stephen Chang commented, “Our fiscal Q4 revenue was above the mid-point of our guidance and gross margin was above the high-end of our guidance. Revenue was $161.5 million, non-GAAP gross margin was 28.5% and non-GAAP EPS was $0.19. Our performance this quarter was driven by a solid recovery across notebook and desktop computing applications and strength in our diversified customer base and product portfolio in Power Supply and Industrial end markets. Even though broader market consumer demand continues to be weak, we are optimistic that the worst phase of this cycle is behind us.”

Mr. Chang concluded, “Looking into the rest of the calendar year 2023, we anticipate further recovery in our seasonally strongest September quarter, driven by fall smartphone launches, PC demand and solar. While we remain cautious, we expect to navigate the current tough macroeconomic environment better than the broader market that we serve, thanks to our robust Tier 1 customer partnerships, leading market share, as well as a much more diversified total solutions product portfolio serving a broader set of end markets across consumer, commercial and industrial use cases.”

Business Outlook for Fiscal Q1 Ending September 30, 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.

• Revenue is expected to be $180 million plus or minus $10 million.
• Gross margin is expected to be 27.2% plus or minus 1%. Non-GAAP gross margin is expected to be 28.5% plus or minus 1%.
• GAAP operating expenses are expected 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 $40.0 million plus or minus $1 million.
• Interest expense is expected to be $1.2 million, and
• Tax expense is expected to be $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 fourth quarter and the fiscal year ended June 30, 2023 today, August 9, 2023 at 2:00 p.m. PT / 5:00 p.m. ET. To listen to the live conference call, please dial +1 (844) 200-6205 or +1 (929) 526-1599 if dialing from outside the United States and Canada. The access code is 379676. 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 and expected recovery timeline; seasonality of our business, anticipated earnings power and non-GAAP EPS on an annual basis, our growth opportunities and new markets, 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 objectives to achieve revenue target, our ability to continue to win and acquire market share and other information under the section entitled “Business Outlook for Fiscal Q1 Ending September 30, 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 macroeconomic environment; seasonality of our markets; decline of the PC industry and our ability to respond to such decline; our lack of control over the joint venture in China; difficulties and challenges in executing our diversification strategy into different market segments; ordering pattern from distributors and seasonality; changes in regulatory environment; 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 to be 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) attributable to AOS, diluted earnings (loss) 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, equity method investment loss from equity investee, and gain on deconsolidation and changes of the equity interest in the JV Company. 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.