On December 2, 2024, U.S. Department of Commerce's Bureau of Industry and Security released new interim final rules adding new companies to the U.S. Entity List and further restricting our ability to provide certain semiconductor capital equipment products and services to China-based customers without a license (the "2024 BIS Rules"). The 2024 BIS Rules are complex, and we are still reviewing their application to our products and services.

Following preliminary reviews of potential business implications to our December quarter resulting from the 2024 BIS Rules, we are reaffirming our guidance for our quarter ending December 31, 2024, as previously provided in our earnings release for the quarter ended September 30, 2024.

We will make additional public statements about our business at investor conferences on December 3-4,2024, where we will discuss the broader business context and calendar year 2025 business impact of the 2024 BIS Rules.

Note Regarding Forward-Looking Statements:

Statements in this current report other than historical facts, such as statements pertaining to our guidance for the quarter ending December 31, 2024, are forward-looking statements and are subject to the Safe Harbor provisions created by the Private Securities Litigation Reform Act of 1995. These forward-looking statements are based on current information and expectations and involve a number of risks and uncertainties. Actual results may differ materially from those projected in such statements due to various factors, including, but not limited to: our vulnerability to a weakening in the condition of the financial markets and the global economy; risks related to our international operations; new and evolving Bureau of Industry and Security of the U.S. Department of Commerce rules and regulations and their impact on our ability to sell products to and provide services to certain customers in China; costly intellectual property disputes that could result in our inability to sell or use the challenged technology; risks related to the legal, regulatory and tax environments in which we conduct our business; increasing attention to environment, social and governance ("ESG") matters and the resulting costs, risks and impact on our business; unexpected delays, difficulties and expenses in executing against our environmental, climate, diversity and inclusion or other ESG targets, goals and commitments; our ability to attract, retain and motivate key personnel; our vulnerability to disruptions and delays at our third party service providers; cybersecurity threats, cyber incidents affecting our and our business partners' systems and networks; our inability to access critical information in a timely manner due to system failures; risks related to acquisitions, integrations, strategic alliances or collaborative arrangements; climate change, earthquake, flood or other natural catastrophic events, public health crises such as the COVID-19pandemic or terrorism and the adverse impact on our business operations; the war between Ukraine and Russia, and the war in the Middle East, and the significant military activity in that region; lack of insurance for losses and interruptions caused by terrorists and acts of war, and our self-insurance of certain risks including earthquake risk; risks related to fluctuations in foreign currency exchange rates; risks related to fluctuations in interest rates and the market values of our portfolio investments; risks related to tax and regulatory compliance audits; any change in taxation rules or practices and our effective tax rate; compliance costs with federal securities laws, rules, regulations, NASDAQ requirements, and evolving accounting standards and practices; ongoing changes in the technology industry, and the semiconductor industry in particular, including future growth rates, pricing trends in end-markets,or changes in customer capital spending patterns; our vulnerability to a highly concentrated customer base; the cyclicality of the industries in which we operate; our ability to timely develop new technologies and products that successfully address changes in the industry; risks related to artificial intelligence; our ability to maintain our technology advantage and protect proprietary rights; our ability to compete in the industry; availability and cost of the materials and parts used in the production of our products; our ability to operate our business in accordance with our business plan; risks related to our debt and leveraged capital structure; we may not be able to declare cash dividends at all or in any particular amount; liability to our customers under indemnification provisions if our products fail to operate properly or contain defects or our customers are sued by third parties due to our products; our government funding for research and development is subject to audit, and potential termination or penalties; we may incur significant restructuring charges or other asset impairment charges or inventory write offs; risks related to receivables factoring arrangements and compliance risk of certain settlement agreements with the government; and risks related to the Court of Chancery of the State of Delaware being the sole and exclusive forum for certain actions and proceedings. For other factors that may cause actual results to differ materially from those projected and anticipated in forward-looking statements in this current report, please refer to our Annual Report on Form 10-Kfor the year ended June 30, 2024, and other subsequent filings with the Securities and Exchange Commission (including, but not limited to, the risk factors described therein). We assume no obligation to, and do not currently intend to, update these forward-looking statements.