Lam Research Corporation: 10-K Risk Factor Changes

Sales to a limited number of large customers constitute a significant portion of our overall shipments, revenue, cash flows and profitability. As a result, the actions of even one customer may subject us to variability in those areas that is difficult to predict. In addition, large customers may be able to negotiate requirements that result in decreased pricing, increased costs, and/or lower margins for us and limitations on our ability to share technology with others. Similarly, significant portions of our credit risk may, at any given time, be concentrated among a limited number of customers so that the failure of even one of these key customers to pay its obligations to us could significantly impact our financial results. Lam Research Corporation 2025 10-K 14 Lam Research Corporation 2025 10-K 14 Lam Research Corporation 2025 10-K 14 Table of Contents Table of Contents

Sales to a limited number of large customers constitute a significant portion of our overall shipments, revenue, cash flows and profitability. As a result, the actions of even one customer may subject us to variability in those areas that is difficult to predict. In addition, large customers may be able to negotiate requirements that result in decreased pricing, increased costs, and/or lower margins for us and limitations on our ability to share technology with others. Similarly, significant portions of our credit risk may, at any given time, be concentrated among a limited number of customers so that the failure of even one of these key customers to pay its obligations to us could significantly impact our financial results.

Epidemics, pandemics or outbreaks of diseases may arise at any time and may have significant business, operational, and financial impacts. For example, the COVID-19 pandemic has in the past and additional global heath crises may in the future result in efforts by national, state and local governments worldwide to control the applicable disease’s spread. Such governmental efforts may result in measures aimed at containing the applicable disease such as quarantines, travel bans, shutdowns, and shelter in place or “stay at home” orders, which collectively have the potential to significantly restrict the ability of businesses to operate. In addition, restrictions resulting from global health crises and related measures aimed at containing the applicable disease, incidents of confirmed or suspected infections within our workforce or those of our suppliers or other business partners, and efforts to act in the best interests of our employees, customers, and suppliers, in connection with a pandemic or disease outbreak, may affect our business and operations by, among other things, causing facility closures, production delays and capacity limitations; disrupting production by our supply chain; disrupting the transport of goods from our supply chain to us and from us to our customers; requiring modifications to our business processes; requiring the implementation of business continuity plans; requiring the development and qualification of alternative sources of supply; requiring the implementation of social distancing measures that impede manufacturing processes; disrupting business travel; disrupting our ability to staff our on-site manufacturing and research and development facilities; delaying capital expansion projects; and necessitating teleworking by portions of our workforce. These impacts may cause delays in product shipments and product development, increases in costs, and decreases in revenue, profitability and cash from operations, which may cause an adverse effect on our results of operations that may be material. Global health crises may also have significant macroeconomic impacts, including, but not limited to, significant disruption of global financial markets, increases in levels of unemployment, and economic uncertainty. This may lead to significant negative impacts on customer spending, demand for our products, the ability of our customers to pay, our financial condition and the financial condition of our suppliers, and our access to external sources of financing to fund our operations and capital expenditures. Lam Research Corporation 2025 10-K 19 Lam Research Corporation 2025 10-K 19 Lam Research Corporation 2025 10-K 19 Table of Contents Table of Contents

The COVID-19 pandemic and efforts by national, state and local governments worldwide to control its spread resulted in measures aimed at containing the disease such as quarantines, travel bans, shutdowns, and shelter in place or “stay at home” orders, which collectively significantly restricted the movement of people and goods and the ability of businesses to operate. While the exceptional COVID-19 related challenges have mostly subsided, these restrictions and measures, incidents of confirmed or suspected infections within our workforce or those of our suppliers or other business partners, and our efforts to act in the best interests of our employees, customers, and suppliers, previously affected and in the future may affect our business and operations by, among other things, causing facility closures, production delays and capacity limitations; disrupting production by our supply chain; disrupting the transport of goods from our supply chain to us and from us to our customers; requiring modifications to our business processes; requiring the implementation of business continuity plans; requiring the development and qualification of alternative sources of supply; requiring the implementation of social distancing measures that impede manufacturing processes; disrupting business travel; disrupting our ability to staff our on-site manufacturing and research and development facilities; delaying capital expansion projects; and necessitating teleworking by portions of our workforce. These impacts caused and, in the future, may cause delays in product shipments and product development, increases in costs, and decreases in revenue, profitability and cash from operations, which caused and, in the future, may cause an adverse effect on our results of operations that may be material. The pandemic resulted at various times in significant disruption of global financial markets, increases in levels of unemployment, and economic uncertainty, which adversely impacted our business and may do so in the future, and may lead to significant negative impacts on customer spending, demand for our products, the ability of our customers to pay, our financial condition and the financial condition of our suppliers, and our access to external sources of financing to fund our operations and capital expenditures.