AOS plans to hold an investor teleconference and live webcast to discuss the financial results for the fiscal second quarter of 2018 ended December 31, 2017 today, February 7, 2018 at 2:00 p.m. PT / 5:00 p.m. ET.  To participate in the live call, analysts and investors should dial 877-312-8797 (or 253-237-1194 if outside the U.S.).  To access the live webcast and the subsequent replay of the conference call, which will be available for seven days after the live call, go to the "Events & Presentations" section of the company's investor relations website, http://investor.aosmd.com.  In addition, a copy of the script of prepared remarks by CEO and CFO at the investor teleconference and webcast is available prior to the call at the Company’s investor relations website.

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 projected amount of revenue, gross margin, operating income (loss), income tax expenses, net income (loss), noncontrolling interest, and share-based compensation expenses, adjusted gross margin, adjusted operating expenses, tax expenses, and adjusted loss attributable to non-controlling interest, our ability and strategy to develop new products, including digital power controller products,  the ability to expand our sales, maintain optimal capacity and achieve sustained growth and profitability, the ability of our repurchase program to enhance shareholder value, the pre-production phase of our Chongqing joint venture, and our strategy to develop the new digital power business, and other information under the section entitled “Business Outlook for Fiscal Q3 Ending March 31, 2018”.  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 decline of the PC industry and our ability to respond to such decline; difficulties and challenges in executing our diversification strategy into different market segments; ordering pattern from distributors and seasonality; our ability to introduce or develop new and enhanced products that achieve market acceptance, 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, our ability to successfully operate our joint venture in China, and other risks as described in our SEC filings, including our Annual Report on Form 10-K for the fiscal year ended June 30, 2017 filed on September 5, 2017.  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 income (loss), net income (loss) and diluted earnings per share ("EPS").  These supplemental measures excludes share-based compensation expenses for all periods presented and income tax benefit from tax reform for current period in this press release.  We also disclose certain non-GAAP financial measures in our guidance for the next quarter, including non-GAAP gross margin, operating expenses and loss attributable to non-controlling interest.  These forecast supplemental measures exclude estimated pre-production expenses relating to our Chongqing joint venture. We believe that these historical and forecast non-GAAP financial measures can 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, such as the joint venture pre-production expenses.  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 the non-GAAP financial measures we use 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 adjusted 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.  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.

About Alpha and Omega Semiconductor

Alpha and Omega Semiconductor Limited, or AOS, is a designer, developer and global supplier of a broad range of power semiconductors, including a wide portfolio of Power MOSFET, IGBT, IPM and Power IC products. AOS has developed extensive intellectual property and technical knowledge that encompasses the latest advancements in the power semiconductor industry, which enables us to introduce innovative products to address the increasingly complex power requirements of advanced electronics. AOS differentiates itself by integrating its Discrete and IC semiconductor process technology, product design, and advanced packaging know-how to develop high performance power management solutions. AOS's portfolio of products targets high-volume applications, including portable computers, flat panel TVs, LED lighting, smart phones, battery packs, consumer and industrial motor controls and power supplies for TVs, computers, servers and telecommunications equipment. For more information, please visit www.aosmd.com.

The following unaudited consolidated financial statements are prepared in accordance with U.S. GAAP.

CONTACT:
Alpha and Omega Semiconductor Limited
Investor Relations
So-Yeon Jeong
408-789-3172
investors@aosmd.com