Lam Research 10-Q 2025-12-28

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q

(Mark One)

For the quarterly period ended December 28, 2025

or

For the transition period from to

Commission file number 0-12933

LAM RESEARCH CORPORATION

(Exact name of registrant as specified in its charter)

Registrant’s telephone number, including area code: (510) 572-0200

Securities registered pursuant to Section 12(b) of the Act:

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes ☒ No ☐

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§ 232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files). Yes ☒ No ☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). Yes ☐ No ☒

As of January 27, 2026, the Registrant had 1,248,771 thousand shares of Common Stock outstanding.

LAM RESEARCH CORPORATION

TABLE OF CONTENTS

PART I. FINANCIAL INFORMATION

LAM RESEARCH CORPORATION

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS

(in thousands, except per share data)

(unaudited)

See Notes to Condensed Consolidated Financial Statements

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LAM RESEARCH CORPORATION

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME

(in thousands)

(unaudited)

See Notes to Condensed Consolidated Financial Statements

Lam Research Corporation 2025 Q3 10-Q 4

LAM RESEARCH CORPORATION

CONDENSED CONSOLIDATED BALANCE SHEETS

(in thousands, except per share data)

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CAUTIONARY STATEMENT REGARDING FORWARD-LOOKING STATEMENTS

With the exception of historical facts, the statements contained in this discussion are forward-looking statements, which are subject to the safe harbor provisions created by the Private Securities Litigation Reform Act of 1995. Certain, but not all, of the forward-looking statements in this report are specifically identified as forward-looking, by use of phrases and words such as “believe,” “estimated,” “anticipate,” “expect,” “probable,” “intend,” “plan,” “aim,” “may,” “should,” “could,” “would,” “will,” “continue,” and other future-oriented terms. The identification of certain statements as “forward-looking” does not mean that other statements not specifically identified are not forward-looking. Forward-looking statements include, but are not limited to, statements that relate to: trends and opportunities in the global economic environment; trends and opportunities in the semiconductor industry, including in the end markets and applications for semiconductors, in device complexity, and in the complexity of device manufacturing; growth or decline in the industry and the market for, and spending on, wafer fabrication equipment; the anticipated levels of, and rates of change in, margins, market share, served available market, capital expenditures, research and development expenditures, international sales, revenue (actual and/or deferred), operating expenses and earnings generally; management’s plans and objectives for our current and future operations and business focus; restructuring activities; business process improvements and initiatives; volatility in our quarterly results; the makeup of our customer base; customer and end user requirements and our ability to satisfy those requirements; the performance and benefits of our products and services; customer spending and demand for our products and services, and the reliability of indicators of change in customer spending and demand; the effect of variability in our customers’ business plans or demand for our products and services; our competition, and our ability to defend our market share and to gain new market share; the success of joint development and collaboration relationships with customers, suppliers, or others; outsourced activities; our supply chain and the role of suppliers in our business, including the impacts of supply chain constraints and material costs; our leadership and competency, and our ability to facilitate innovation; our research and development programs; the opportunities in our industry for, and our ability to create sustainable differentiation; technology inflections in the industry and our ability to identify those inflections and to invest in research and development programs to meet them; our ability to deliver multi-product solutions; the resources invested to comply with evolving standards and the impact of such efforts; changes in state, federal and international tax laws, our estimated annual tax rate and the factors that affect our tax rates; legal and regulatory compliance; the estimates we make, and the accruals we record, in order to implement our critical accounting policies (including, but not limited to, the adequacy of prior tax payments, future tax benefits or liabilities, and the adequacy of our accruals relating to them); hedging transactions; debt or financing arrangements; our investment portfolio; our access to capital markets; uses of, payments of, and impact of interest rate fluctuations on, our debt; our intention to pay quarterly dividends and the amounts thereof, if any; our ability and intention to repurchase our shares; credit risks; controls and procedures; recognition or amortization of expenses; our ability to manage and grow our cash position; our ability to scale our operations to respond to changes in our business; our goals and initiatives with respect to environmental, social and governance matters, including emissions, and human capital, the value of our patents; the materiality of potential losses arising from legal proceedings; the probability of making payments under our guarantees; and the sufficiency of our financial resources or liquidity to support future business activities (including, but not limited to, operations, investments, debt service requirements, dividends, and capital expenditures). Such statements are based on current expectations and are subject to risks, uncertainties, and changes in condition, significance, value, and effect, including without limitation those discussed below under the heading “Risk Factors” within Part II Item 1A and elsewhere in this report and other documents we file from time to time with the Securities and Exchange Commission (“SEC”), such as our annual report on Form 10-K for the year ended June 29, 2025 (our “2025 Form 10-K”), and our current reports on Form 8-K. Such risks, uncertainties, and changes in condition, significance, value, and effect could cause our actual results to differ materially from those expressed in this report and in ways not readily foreseeable. Readers are cautioned not to place undue reliance on these forward-looking statements, which speak only as of the date hereof and are based on information currently and reasonably known to us. We do not undertake any obligation to release the results of any revisions to these forward-looking statements, which may be made to reflect events or circumstances that occur after the date of this report or to reflect the occurrence or effect of anticipated or unanticipated events.

Documents To Review In Connection With Management’s Discussion and Analysis Of Financial Condition and Results Of Operations

For a full understanding of our financial position and results of operations for the three and six months ended December 28, 2025, and the related Management’s Discussion and Analysis of Financial Condition and Results of Operations below, you should also read the Condensed Consolidated Financial Statements and notes presented in this Form 10-Q and the financial statements and notes in our 2025 Form 10-K.

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EXECUTIVE SUMMARY

Lam Research Corporation is a global supplier of innovative wafer fabrication equipment and services to the semiconductor industry. We have built a strong global presence with core competencies in areas like nanoscale manufacturing enablement, chemistry, plasma and fluidics, advanced systems engineering, and a broad range of operational disciplines. Our products and services are designed to help our customers build smaller and better performing devices that are used in a variety of electronic products, including mobile phones, personal computers, cloud and enterprise servers, wearables, automotive vehicles, and data storage devices.

Our customer base includes leading semiconductor memory, foundry, and integrated device manufacturers that make products such as non-volatile memory, dynamic random-access memory, and logic devices. Their continued success is part of our commitment to driving semiconductor breakthroughs that define the next generation. Our core technical competency is integrating hardware, process, materials, software, and process control, enabling results on the wafer.

Semiconductor manufacturing, our customers’ business, involves the fabrication of multiple dies or integrated circuits on a wafer. This involves the repetition of a set of core processes and can require hundreds of individual steps. Fabricating these devices requires a sequence of highly sophisticated process technologies to integrate an increasing array of new materials with precise control at the atomic scale. Along with meeting technical requirements, wafer processing equipment must deliver high productivity and be cost-effective.

Demand from cloud computing, artificial intelligence, 5G, the Internet of Things, and other markets is driving the need for increasingly powerful and cost-efficient semiconductors. At the same time, there are growing technical challenges with traditional two-dimensional scaling. These trends are driving significant inflections in semiconductor manufacturing, such as the increasing importance of vertical scaling strategies like three-dimensional architecture as well as multiple patterning to enable shrinks.

We believe we are in a strong position with our leadership and expertise in deposition, etch, and clean markets to facilitate some of the most significant innovations in semiconductor device manufacturing. Our Customer Support Business Group provides products and services to maximize installed equipment performance, predictability, and operational efficiency. Several factors create opportunities for sustainable differentiation for us: (i) our focus on research and development, with several ongoing programs relating to sustaining engineering, product and process development, and concept and feasibility; (ii) our ability to effectively leverage cycles of learning from our broad installed base; (iii) our collaborative focus with semi-ecosystem partners, including our close-to-customer focus; (iv) our ability to identify and invest in the breadth of our product portfolio to meet technology inflections; and (v) our focus on delivering our multi-product solutions with a goal to enhance the value of Lam’s solutions to our customers.

Wafer fabrication equipment spending levels were strong in the 2025 calendar year driven by higher levels of semiconductor demand leading to an increase in both the memory and non-memory market segments. In the short term, volatility in the semiconductor industry environment from trade restrictions, tariffs, as well as other direct and indirect risks and uncertainties, have had, and in the future may have, a negative impact on our revenue and operating margin. Over the longer term, we believe that secular demand for semiconductors, combined with technology inflections in our industry, including 3D device scaling, multiple patterning, process flow, and advanced packaging chip integration, will drive sustainable growth and lead to an increase in the served available market for our products and services in the deposition, etch, and clean businesses.

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The following table summarizes certain key financial information for the periods indicated below:

In the December 2025 quarter, revenue was up slightly compared to the three months ended September 28, 2025 (the “September 2025 quarter”), as increases in customer support-related revenue were largely offset by decreases in systems revenue due to timing of customer investments. The deferred revenue balance was $2.25 billion at the end of the December 2025 quarter, down relative to the balance at the end of the September 2025 quarter of $2.77 billion, due to a decrease in customer down payments.

We aim to balance the requirements of our customers with the availability of resources, as well as performance to our operational and financial objectives. As a result, from time to time, we exercise discretion and judgment as to the timing and prioritization of manufacturing and deliveries of products, which has impacted, including in the current fiscal year, and may in the future impact, the timing of revenue recognition with respect to such products.

The decrease in gross margin as a percentage of revenue in the December 2025 quarter compared to the September 2025 quarter was primarily a result of unfavorable changes in customer mix. The operating expenses in the December 2025 quarter were relatively flat compared to the September 2025 quarter.

Our cash, cash equivalents, and restricted cash balances decreased to $6.2 billion at the end of the December 2025 quarter compared to $6.7 billion at the end of the September 2025 quarter. This decrease was primarily the result of $1,466.2 million of share repurchases, including net share settlement of employee stock-based compensation and excise tax; $327.5 million of dividends paid to stockholders; and $260.9 million of capital expenditures, partially offset by $1,480.0 million of cash generated from operating activities. Employee headcount as of December 28, 2025 was approximately 19,700.

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RESULTS OF OPERATIONS

The increase in revenue in the six months ended December 28, 2025 compared to the same period in the prior year was predominantly driven by increases in Foundry equipment spending by our customers, as well as higher customer support-related revenue.

The following table presents our revenue disaggregated between systems and customer support-related revenue:

Please refer to Note 3, “Revenue,” to the Condensed Consolidated Financial Statements of this Form 10-Q for additional information regarding the composition of the two categories into which revenue has been disaggregated.

The percentage of leading- and non-leading-edge equipment and upgrade revenue from each of the markets we serve was as follows:

The decrease in the foundry market segment for the December 2025 quarter compared to the September 2025 quarter was primarily driven by mature node investments, while the memory market segment saw strengthened DRAM investments offset by lower non-volatile memory spending.

Gross Margin

Gross margin as a percentage of revenue decreased in the December 2025 quarter compared to the September 2025 quarter driven primarily by unfavorable changes in customer mix.

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The increase in gross margin as a percentage of revenue in the six months ended December 28, 2025 compared to the same period in the prior year was primarily due to favorable changes in customer mix, partially offset by reduced factory efficiencies from higher tariff-related spend.

Research and Development

We continued to make significant R&D investments in the December 2025 quarter focused on leading-edge deposition, etch, clean and other semiconductor manufacturing processes. R&D expense in the December 2025 quarter was relatively flat compared to the September 2025 quarter.

R&D expense in the six months ended December 28, 2025 increased compared to the same period in the prior year, driven by higher employee-related costs as a result of increased headcount and increased spending on supplies.

Selling, General, and Administrative

SG&A expense during the December 2025 quarter was relatively flat compared to the September 2025 quarter.

SG&A expense in the six months ended December 28, 2025 increased compared to the same period in the prior year, primarily as a result of higher employee-related costs due to increased headcount.

Other Income (Expense), Net

Other income (expense), net consisted of the following:

Interest income decreased in the December 2025 quarter compared to the September 2025 quarter, primarily due to lower cash balances and lower interest rates. Interest income decreased in the six months ended December 28, 2025 compared to the same period in the prior year, primarily due to lower interest rates, partially offset by higher cash balances.

Interest expense was flat in the December 2025 quarter compared to the September 2025 quarter. Interest expense decreased in the six months ended December 28, 2025 compared to the same period in the prior year primarily due to the maturity of $500 million of the Company’s senior notes in March 2025.

The gains on deferred compensation plan-related assets, net were driven by fluctuations in the fair market value of the underlying funds for all periods presented.

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Foreign exchange fluctuations were primarily due to currency movements against portions of our unhedged balance sheet exposures for all periods presented.

The variation in other, net in the December 2025 quarter and the six months ended December 28, 2025 compared to the September 2025 quarter and to the same period in the prior year was primarily driven by fluctuations in the fair market value of equity investments.

Income Tax Expense

Our provision for income taxes and effective tax rate for the periods indicated were as follows:

The decrease in the effective tax rate for the December 2025 quarter compared to the September 2025 quarter was primarily due to the revaluation of deferred taxes due to changes in the U.S. taxation of non-U.S. income under OBBBA in the September 2025 quarter.

The increase in the effective tax rate for the six months ended December 28, 2025 compared to the same period in the prior year was primarily due to the income tax benefit from a change in tax law in the six months ended December 29, 2024, and the tax expense associated with the revaluation of deferred taxes due to changes in the U.S. taxation of non-U.S. income under OBBBA and GMT being fully effective in the six months ended December 28, 2025.

International revenues account for a significant portion of our total revenues, such that a material portion of our pre-tax income is earned and taxed outside the United States. International pre-tax income is taxable in the United States at a lower effective tax rate than the federal statutory tax rate. Please refer to Note 7, “Income Taxes”, to our Consolidated Financial Statements in Part II, Item 8 of our 2025 Form 10-K for additional information.

We re-evaluate uncertain tax positions on a quarterly basis. This evaluation is based on factors including, but not limited to, changes in facts or circumstances, changes in tax law, effectively settled issues under audit, and new audit activity. Any change in recognition or measurement would result in the recognition of a tax benefit or an additional charge to the tax provision.

BEPS 2.0 GMT is fully effective for us this fiscal year. We assessed our exposure to GMT under currently enacted legislation and determined that we expect to meet transitional safe harbor requirements in most jurisdictions, with limited jurisdictions subject to GMT.

On July 4, 2025, the OBBBA was signed into law by U.S. President Donald Trump. The impact on income taxes due to change in legislation is required, under ASC 740, Income Taxes, to be recognized in the period in which the law is enacted, which is this fiscal year. In general, the OBBBA introduces changes to U.S. taxation, including changes in the taxation of non-U.S. income.

CRITICAL ACCOUNTING POLICIES AND ESTIMATES

Our critical accounting policies and estimates are unchanged from those disclosed in “Critical Accounting Policies and Estimates” in Part II, Item 7 of our 2025 Form 10-K.

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Recent Accounting Pronouncements

See Note 2 - Recent Accounting Pronouncements, of our Condensed Consolidated Financial Statements, included in Part 1 of this Form 10-Q for details of any recently adopted or effective accounting pronouncements.

Updates Not Yet Effective

In December 2023, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2023-09, “Income Taxes (Topic 740): Improvements to Income Tax Disclosures,” which requires public entities to disclose consistent categories and greater disaggregation of information in the rate reconciliation and for income taxes paid. It also includes certain other amendments to improve the effectiveness of income tax disclosures. The guidance is effective for financial statements issued for annual periods beginning after December 15, 2024, with early adoption permitted. The Company is required to adopt this standard prospectively in fiscal year 2026 for the annual reporting period ending June 28, 2026. The Company does not expect the adoption of ASU 2023-09 to have an impact on its Consolidated Financial Statements other than additional footnote disclosures.

In November 2024, the FASB issued ASU 2024-03, “Income Statement—Reporting Comprehensive Income—Expense Disaggregation Disclosures (Subtopic 220-40): Disaggregation of Income Statement Expenses,” which requires disaggregation of certain expenses in the notes to the financial statements to provide enhanced transparency into the expense captions presented on the face of the income statement. In January 2025, the FASB issued ASU 2025-01 which clarified the effective date for entities that do not have an annual reporting period that ends on December 31st. The guidance is effective for annual periods beginning after December 15, 2026, and interim reporting periods within annual reporting periods beginning after December 15, 2027, with early adoption permitted. The Company is required to adopt this standard in fiscal year 2028 for the annual reporting period ending June 25, 2028 either (1) prospectively to financial statements issued for reporting periods after the effective date or (2) retrospectively to any or all prior periods presented in the financial statements. The Company will apply the guidance prospectively and is currently in the process of evaluating the impact of adoption on its Consolidated Financial Statements.

In December 2025, the FASB issued ASU 2025-10, “Accounting for Government Grants Received by Business Entities,” which introduces guidance for recognizing, measuring, and presenting government grants, addressing diversity in practice. The guidance is effective for annual reporting periods beginning after December 15, 2028, and interim reporting within those annual reporting periods, with early adoption permitted. The Company is required to adopt this standard in the first quarter of fiscal year 2030. The Company does not expect the adoption of ASU 2025-10 to have an impact on its Consolidated Financial Statements.

LIQUIDITY AND CAPITAL RESOURCES

Total gross cash, cash equivalents, and restricted cash balances were $6.2 billion at December 28, 2025 compared to $6.4 billion as of June 29, 2025. The decrease was primarily driven by $2.44 billion of share repurchases, including net share settlement on employee stock-based compensation and excise tax; $619.5 million in dividends paid; and $446.0 million in capital expenditures, partially offset by cash generated from operating activities totaling $3.26 billion.

Cash Flows from Operating Activities

Net cash provided by operating activities of $3.26 billion during the six months ended December 28, 2025 consisted of (in thousands):

Changes in operating asset and liability accounts, net of foreign exchange impact, included the following sources of cash: decreases in inventory of $211.8 million and prepaid expenses and other current assets of $118.5 million, and increases in accounts payable of $110.7 million. These sources of cash were offset by the following uses of cash: decreases in deferred gross profit of $400.8 million and accrued expenses and other liabilities of $103.5 million, and increases in accounts receivable of $116.0 million.

Cash Flows from Investing Activities

Net cash used for investing activities during the six months ended December 28, 2025 was $443.8 million, primarily consisting of capital expenditures.

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Cash Flows from Financing Activities

Net cash used for financing activities during the six months ended December 28, 2025 was $3.01 billion, primarily consisting of $2.44 billion in treasury stock repurchases, including net share settlement on employee stock-based compensation and excise tax and $619.5 million in dividends paid.

Liquidity

Given that the semiconductor industry is highly competitive and has historically experienced rapid changes in demand, we believe that maintaining sufficient liquidity reserves is important to support sustaining levels of investment in R&D and capital infrastructure. Anticipated cash flows from operations based on our current business outlook, combined with our current levels of cash and cash equivalents as of December 28, 2025, are expected to be sufficient to support our anticipated levels of operations, investments, debt service requirements, capital expenditures, capital redistributions, and dividends through at least the next twelve months. However, factors outside of our control, including uncertainty in the global economy and the semiconductor industry, as well as disruptions in credit markets, have in the past, are currently, and could in the future, impact customer demand for our products, as well as our ability to manage normal commercial relationships with our customers, suppliers, and creditors.

In the longer term, liquidity will depend to a great extent on our future revenues and our ability to appropriately manage our costs based on demand for our products and services. While we have substantial cash balances, we may require additional funding and need or choose to raise the required funds through borrowings or public or private sales of debt or equity securities. We believe that, if necessary, we will be able to access the capital markets on terms and in amounts adequate to meet our objectives. However, domestic and global macroeconomic and political conditions could cause disruptions to the capital markets and otherwise make any financing more challenging, and there can be no assurance that we will be able to obtain such financing on commercially reasonable terms or at all.

For financial market risks related to changes in interest rates and foreign currency exchange rates, refer to Part II, Item 7A, “Quantitative and Qualitative Disclosures About Market Risk”, in our 2025 Form 10-K. Our exposure related to market risk has not changed materially since June 29, 2025.

Design of Disclosure Controls and Procedures and Internal Control over Financial Reporting

We maintain disclosure controls and procedures and internal control over financial reporting that are designed to comply with Rule 13a-15 of the Exchange Act. In designing and evaluating the controls and procedures associated with each, management recognizes that any controls and procedures, no matter how well designed and operated, can provide only reasonable assurance of achieving the desired control objectives, and that the effectiveness of controls cannot be absolute because the cost to design and implement a control to identify errors or mitigate the risk of errors occurring should not outweigh the potential loss caused by the errors that would likely be detected by the control. Moreover, we believe that a control system cannot be guaranteed to be 100% effective all of the time. Accordingly, a control system, no matter how well designed and operated, can provide only reasonable, not absolute, assurance that the control system’s objectives will be met.

Disclosure Controls and Procedures

As required by Exchange Act Rule 13a-15(b), as of December 28, 2025, we carried out an evaluation, under the supervision and with the participation of our management, including our Chief Executive Officer and our Chief Financial Officer, of the effectiveness of the design and operation of our disclosure controls and procedures as defined in Rule 13a-15(e). Based upon that evaluation, our Chief Executive Officer, along with our Chief Financial Officer, concluded that our disclosure controls and procedures are effective at the reasonable assurance level.

We intend to review and evaluate the design and effectiveness of our disclosure controls and procedures on an ongoing basis and to correct any material deficiencies that we may discover. Our goal is to ensure that our senior management has timely access to material information that could affect our business.

Changes in Internal Control over Financial Reporting

There has been no change in our internal control over financial reporting during our most recent fiscal quarter that has materially affected, or is reasonably likely to materially affect, our internal control over financial reporting.

Effectiveness of Controls

While we believe the present design of our disclosure controls and procedures and internal control over financial reporting is effective at the reasonable assurance level, future events affecting our business may cause us to modify our disclosure controls and procedures or internal control over financial reporting.

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PART II. OTHER INFORMATION

ITEM 1. Legal Proceedings

Please refer to the subsection entitled “Legal Proceedings” within Note 12 “Commitments and Contingencies," to our Condensed Consolidated Financial Statements in this quarterly report on Form 10-Q.

In addition to the other information in this Form 10-Q, the following risk factors should be carefully considered in evaluating us and our business because such factors may significantly impact our business, operating results, and financial condition. As a result of these risk factors, as well as other risks discussed in our other SEC filings, our actual results could differ materially from those projected in any forward-looking statements. No priority or significance is intended by, nor should be attached to, the order in which the risk factors appear.

INDUSTRY AND CUSTOMER RISKS

We Depend on Creating New Products and Processes and Enhancing Existing Products and Processes for Our Success; Consequently, We Are Subject to Risks Associated with Rapid Technological Change

Rapid technological changes in semiconductor manufacturing processes subject us to increased pressure to develop technological advances that enable those processes. We believe that our future success depends in part upon our ability to develop and offer new products with improved capabilities and to continue to enhance our existing products. If new products or existing products have reliability, quality, design, or safety problems, our performance may be impacted by reduced orders, higher manufacturing costs, delays in acceptance of and payment for new products, and additional service and warranty expenses. We may be unable to develop and manufacture products successfully, or products that we introduce may fail in the marketplace. For more than 25 years, the primary driver of technology advancement in the semiconductor industry has been to shrink the lithography that prints the circuit design on semiconductor chips. That driver could be approaching its technological limit, leading semiconductor manufacturers to investigate more complex changes in multiple technologies in an effort to continue technology development. In addition, the emergence of “big data” and new tools such as machine learning and artificial intelligence (“AI”) that capitalize on the availability of large data sets is leading semiconductor manufacturers and equipment manufacturers to pursue new products and approaches that exploit those tools to advance technology development. In the face of uncertainty on which technology solutions will become successful, we will need to focus our efforts on developing the technology changes that are ultimately successful in supporting our customers’ requirements. Our failure to develop and offer the correct technology solutions in a timely manner with productive and cost-effective products could adversely affect our business in a material way. Our failure to commercialize new products in a timely manner could result in loss of market share, unanticipated costs, and inventory obsolescence, which would adversely affect our financial results.

In order to develop new products and processes and enhance existing products and processes, we expect to continue to make significant investments in R&D, to investigate the acquisition of products and technologies, to invest in or acquire businesses or technologies, and to pursue joint development relationships with customers, suppliers, or other members of the industry. Our investments and acquisitions may not be as successful as we may expect, particularly in the event that we invest in or acquire product lines and technologies that are new to us. We may find that acquisitions are not available to us, for regulatory or other reasons, and that we must therefore limit ourselves to collaboration and joint venture development activities that do not have the same benefits as acquisitions. Pursuing development through collaboration and/or joint development activities rather than through an acquisition may pose substantial challenges for management, including those related to aligning business objectives; sharing confidential information, intellectual property and data; sharing value with third parties; and realizing synergies that might have been available in an acquisition but are not available through a joint development project. We must manage product transitions and joint development relationships successfully, as the introduction of new products could adversely affect our sales of existing products and certain jointly developed technologies may be subject to restrictions on our ability to share that technology, which could limit our market for products incorporating those technologies. Future technologies, processes, or product developments, including as a result of adoption of AI, may render our current product offerings obsolete, leaving us with non-competitive products, obsolete inventory, or both. Moreover, customers may adopt new technologies or processes to address the complex challenges associated with next-generation devices, or may adopt new technologies, including those based upon AI, that reduce their reliance on us for process development. This shift could reduce the size of our addressable markets, increase the relative size of markets in which we either do not compete or have relatively low market share, or reduce our competitiveness within the markets in which we do compete.

We Face a Challenging and Complex Competitive Environment

We face significant competition from multiple competitors, and our competitors may be able to develop products comparable or superior to those we offer or may adapt more quickly to new technologies or evolving customer requirements. In particular, while we continue to develop product enhancements that we believe will address future customer requirements, we may fail in a timely manner to identify those future customer requirements, to devote appropriate resources to developing products to address those requirements, or to complete the development or introduction of these additional product enhancements successfully, or these product enhancements may not achieve market acceptance or be competitive. Accordingly, competition may intensify, and we may be

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unable to continue to compete successfully in our markets, which could have a material adverse effect on our revenues, operating results, financial condition, and/or cash flows.

With increased consolidation efforts in our industry, as well as the emergence and strengthening of new, regional competitors, we may face increasing competitive pressures. Other companies continue to develop systems and/or acquire businesses and products that are competitive to ours and may introduce new products and product capabilities that may affect our ability to sell and support our existing products. We face a greater risk if our competitors enter into strategic relationships with leading semiconductor manufacturers covering products similar to those we sell or may develop, as this could adversely affect our ability to sell products to those manufacturers.

We believe that to remain competitive we must devote significant financial resources to offer products that meet our customers’ needs, to maintain customer service and support centers worldwide, and to invest in product and process R&D. Technological changes and developing technologies have required, and are expected to continue to require, new and costly investments. Certain of our competitors, including those that are created and financially backed by foreign governments, have substantially greater financial resources and more extensive engineering, manufacturing, marketing, and customer service and support resources than we do and therefore have the potential to offer customers a more comprehensive array of products and/or product capabilities and to therefore achieve additional relative success in the semiconductor equipment industry. These competitors may deeply discount or give away products similar to those that we sell, challenging or even exceeding our ability to make similar accommodations and threatening our ability to sell those products. We also

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Rule 10b5-1 and Non-Rule 10b5-1 Trading Arrangements

During the Company’s fiscal quarter ended December 28, 2025, except for the following arrangement, none of the Company’s directors or officers adopted, modified, or terminated a trading arrangement for the purchase or sale of the Company’s common stock that was intended to satisfy the affirmative defense conditions of Rule 10b5-1(c) (a “Rule 10b5-1 Trading Arrangement”) or a non-Rule 10b5-1 trading arrangement (as defined in Item 408(c) of Regulation S-K).

• On October 29, 2025, Patrick J. Lord, the Executive Vice President and Chief Operating Officer of the Company, adopted a Rule 10b5-1 Trading Arrangement. Dr. Lord’s Rule 10b5-1 Trading Arrangement provides for: (i) the potential sale of up to 36,645 shares of the Company’s common stock; (ii) the potential exercise of 10,130 stock options expiring March 1, 2029 and the associated sale of up to 10,130 shares of the Company’s common stock resulting from such exercise; (iii) the

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potential exercise of 28,140 stock options expiring March 1, 2030 and the associated sale of up to 28,140 shares of the Company’s common stock resulting from such exercise; (iv) the potential exercise of 21,220 stock options expiring March 1, 2031 and the associated sale of up to 21,220 shares of the Company’s common stock resulting from such exercise; (v) the potential sale of the net shares of the Company’s common stock resulting from the vesting of 17,244 service-based restricted stock units (net shares are net of tax withholding); and (vi) subject to performance conditions, the potential sale of the net shares of the Company’s common stock resulting from the vesting of 63,345 market-based performance restricted stock units (representing the maximum number of shares that may be issued; the final number of shares that may be earned is 0% to 150% of the target number of 42,230); in each case pursuant to the terms of the Rule 10b5-1 Trading Arrangement. Dr. Lord’s Rule 10b5-1 Trading Arrangement has a termination date of October 30, 2026.

• On November 12, 2025, Bethany J. Mayer, a member of the Board of Directors of the Company, adopted a Rule 10b5-1 Trading Arrangement. Ms. Mayer’s Rule 10b5-1 Trading Arrangement provides for the potential sale of up to 615 shares of the Company’s common stock. Ms. Mayer’s Rule 10b5-1 Trading Arrangement has a termination date of November 9, 2026.

• On November 17, 2025, Neil J. Fernandes, the Senior Vice President, Global Customer Operations, of the Company, adopted a Rule 10b5-1 Trading Arrangement. Mr. Fernandes’ Rule 10b5-1 Trading Arrangement provides for the potential sale of up to 25,829 shares of the Company’s common stock pursuant to the terms of the Rule 10b5-1 Trading Arrangement. Mr. Fernandes’ Rule 10b5-1 Trading Arrangement has a termination date of November 30, 2026.

The Rule 10b5-1 Trading Arrangements of Dr. Lord and Mr. Fernandes contain pricing conditions that preclude or limit the sale of shares below predetermined minimum prices. Each of the Rule 10b5-1 Trading Arrangements will terminate on the earlier of: (a) its respective termination date indicated above; (b) execution of all trades or expiration of all the orders relating to such trades under the Rule 10b5-1 Trading Arrangement; or (c) such date as the Rule 10b5-1 Trading Arrangement is otherwise terminated according to its terms.

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*Indicates management contract or compensatory plan or arrangement.

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LAM RESEARCH CORPORATION

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this Report to be signed on its behalf by the undersigned thereunto duly authorized.

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