UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 10-K

(MARK ONE)

☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the fiscal year ended December 31, 2025

OR

☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

Commission filer number 001-06462

TERADYNE, INC.

(Exact Name of Registrant as Specified in Its Charter)

Registrant’s telephone number, including area code: (978) 370-2700

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

Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act. Yes ☒ No ☐

Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Exchange Act. Yes ☐ No ☒

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 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 ☐

If securities are registered pursuant to Section 12(b) of the Act, indicate by check mark whether the financial statements of the registrant included in the filing reflect the correction of an error to previously issued financial statements. ☐

Indicate by check mark whether any of those error corrections are restatements that required a recovery analysis of incentive-based compensation received by any of the registrant’s executive officers during the relevant recovery period pursuant to § 240.10D-1(b). ☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company. See the definitions of “large accelerated filer,” “accelerated filer” and “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 has filed a report on and attestation to its management’s assessment of the effectiveness of its internal control over financial reporting under Section 404(b) of the Sarbanes-Oxley Act (15 U.S.C. 7262(b)) by the registered public accounting firm that prepared or issued its audit report. ☒

If securities are registered pursuant to Section 12(b) of the Act, indicate by check mark whether the financial statements of the registrant included in the filing reflect the correction of an error to previously issued financial statements. ☐

Indicate by check mark whether any of those error corrections are restatements that required a recovery analysis of incentive-based compensation received by any of the registrant's executive officers during the relevant recovery period pursuant to §240.10D-1(b). ☐

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

The aggregate market value of the voting stock held by non-affiliates of the registrant as of June 29, 2025, was approximately $12.7 billion based upon the closing price of the registrant’s Common Stock on the Nasdaq Stock Market on that date.

The number of shares outstanding of the registrant’s only class of Common Stock as of February 16, 2026, was 156,555,950 shares.

TERADYNE, INC.

INDEX

TERADYNE, INC.

FORM 10-K

SPECIAL NOTE REGARDING FORWARD-LOOKING STATEMENTS

This Annual Report on Form 10-K contains “forward-looking statements” regarding Teradyne's future business prospects, financial performance or position and results of operations. When used herein, the words such as “anticipate,” “expect,” “plan,” “could,” “may,” “will,” “believe,” “estimate,” “goal,” or other comparable terms are intended to identify forward-looking statements although not all forward-looking statements contain these identifying words. Forward-looking statements involve risks and uncertainties, including, but not limited to, those discussed in the section entitled “Risk Factors” of this Annual Report on Form 10-K and elsewhere, and in our other filings with the Securities and Exchange Commission (“SEC”). Readers are cautioned not to place undue reliance on these forward-looking statements which reflect management’s analysis only as of the date hereof and are subject to risks and uncertainties that could cause actual results to differ materially from those stated or implied. Teradyne assumes no obligation to update these forward-looking statements for any reason, except as may be required by law.

PART I

Item 1: Business

Teradyne, Inc. (“Teradyne”) was founded in 1960 and is a leading global provider of automated test equipment and robotics solutions. Teradyne's automated test systems are used to test semiconductors, wireless products, data storage, silicon photonics, and complex electronics systems in many industries including consumer electronics, wireless, automotive, industrial, computing, communications, and aerospace and defense industries. Teradyne's robotics product offerings consist primarily of collaborative robotic arms and autonomous mobile robots used by global manufacturing, logistics and industrial customers to improve quality, increase manufacturing and material handling efficiency while reducing costs. In the first quarter of 2025, Teradyne identified opportunities for operational synergies amongst our production board test, defense and aerospace, and wireless test businesses leading to the creation of the Product Test division as a new segment effective March 2025. Teradyne’s automated test equipment and robotics products and services include:

The market for our test products is concentrated with a limited number of significant customers accounting for a substantial portion of the purchases of test equipment. A few customers drive sizable demand for our offerings both through direct sales and sales to the customer’s supply partners. We expect that sales of our test products will continue to be concentrated with a limited number of major customers for the foreseeable future.

In 2025, our Semiconductor Test segment achieved considerable growth driven by robust demand from Artificial Intelligence (“AI”) applications in networking and with vertically integrated producer (“VIP”) compute solutions. Memory test revenue remained stable despite a smaller overall market, supported by share gains in high bandwidth memory (“HBM”) and DRAM final test applications. The Semiconductor Test segment’s strategic shift toward AI-driven semiconductor testing resulted in AI related customer demand driving the majority of our revenue in the second half of 2025. Looking ahead to 2026, we expect AI related customer demand to continue to represent the bulk of our revenues in the first quarter. Our results reflect our focused investments in AI applications and VIP customers, with benefits from these initiatives materializing throughout 2025 and expected to continue in 2026. In the Product Test Group, we also achieved revenue growth in 2025, bolstered primarily by strength in defense and aerospace applications.

In our Robotics segment, the fourth quarter of 2025 represented the third consecutive quarter of sequential revenue growth. During the year, we aimed at strategic partnerships with original equipment manufacturers, systems integrators, and large enterprise accounts, concentrating on high-growth verticals such as ecommerce, logistics, semiconductor, and electronics. At the same time, we also reduced costs through restructuring activities designed to better position the Robotics organization for future success.

On January 29, 2026, we and MultiLane, a leading high-speed input/output (“I/O”) test and measurement company, announced an agreement to form a joint venture, MultiLane Test Products (“MLTP”). MLTP is being created to serve the growing demand from the AI Data Center equipment market by accelerating the development of test solutions for critical high speed data connections. Under the agreement, MultiLane will contribute all the assets related to its test and measurement business to the joint venture and we will invest approximately $157 million in exchange for 75% ownership of MLTP. This transaction is expected to close in the first half of 2026 and is subject to customary closing conditions.

On May 31, 2025, we acquired privately held Quantifi Photonics (“Quantifi”), a leader in PIC test solutions for a total purchase price of $127.2 million. This acquisition enables the delivery of scalable PIC test solutions and is included in our Product Test segment. Over time, we also intend to leverage Quantifi's engineering expertise and technology to enhance functionality and create additional differentiation in our Semiconductor Test business, specifically with integration into our UltraFlexplus platform.

On January 31, 2025, we acquired Infineon Technologies AG's (“Infineon”) automated test equipment technology and associated development team (“AET”) based in Regensburg, Germany for a total purchase price of 17.6 million Euros, equivalent to $18.3 million. AET adds resources and expertise to our company and strengthens the relationship between us and this key customer. AET is included in our Semiconductor Test segment.

Our financial statements are denominated in U.S. dollars. While revenues in our test businesses are predominantly in U.S. dollars, the majority of our Robotics revenue is denominated in foreign currencies. Strengthening of the U.S. dollar would negatively affect Robotics revenue in 2026.

Our corporate strategy is to profitably grow revenue and market share through the introduction of differentiated products targeting expanding markets and customer needs. Our capital allocation plan will continue to be balanced between investing in organic and inorganic growth and returning cash to shareholders through share repurchases and dividends.

We are subject to tariffs and restrictions from the dynamically changing global trade environment. While it is difficult to quantify the exact impact, current trade restrictions are limiting our ability to be competitive, particularly in certain markets, where some competitors are not subjected to the same restrictions. We continue to monitor developments in international trade policy, including potential changes to tariffs, further export controls, and other regulatory measures that could affect our supply chain, cost structure, or market access. For information regarding risks associated with import-export control regulations and similar applicable laws and regulations, see Part II - Item 1A “Risk Factors- Risks Related to Legal and Regulatory Compliance.”

Investor Information

We are a Massachusetts corporation incorporated on September 23, 1960. We are subject to the informational requirements of the Securities Exchange Act of 1934 (“Exchange Act”). We file periodic reports, proxy statements and other information with the SEC. The SEC maintains an internet site (http://www.sec.gov) that contains reports, proxy and information statements and other information regarding issuers that file documents electronically.

You can access financial and other information, including the charters of our Audit Committee, Compensation Committee and Nominating and Corporate Governance Committee, our Corporate Governance Guidelines and Code of Conduct, by clicking the Investors link on our web site at www.teradyne.com. We make available, free of charge, copies of our filings with the SEC, including our annual reports on Form 10-K, quarterly reports on Form 10-Q, current reports on Form 8-K and amendments to those reports filed or furnished pursuant to Section 13(a) or 15(d) of the Exchange Act through our web site as soon as reasonably practicable after filing such material electronically or otherwise furnishing it to the SEC.

Products

Semiconductor Test

We design, manufacture, sell and support Semiconductor, Hard Disk Drive (“HDD”), and Solid State Disk (“SSD”) test systems and related services on a worldwide basis. The test systems we provide are used for wafer level, device package testing, and system level testing. These devices are used in AI, automotive, industrial, communications, consumer, smartphones, cloud, computer and electronic game applications, among others. Semiconductor devices span a broad range of functionality, from very simple low-cost devices such as microcontrollers, operational amplifiers or voltage regulators to complex digital signal processors, Artificial Intelligence/Machine Learning (“AI/ML”) training ASICs, high performance computing and microprocessors as well as memory devices. Semiconductor Test products and services are sold to integrated device manufacturers (“IDMs”) that integrate the fabrication of silicon wafers into their business, “Fabless” companies that outsource the manufacturing of silicon wafers, “Foundries” that cater to the processing and manufacturing of silicon wafers, and semiconductor assembly and test providers (“OSATs”) that provide test and assembly services for the final packaged devices to both Fabless companies and IDMs. Fabless companies perform the design of integrated circuits and use Foundries for wafer manufacturing and OSATs for test and assembly. Our customers obtain the overall benefit of comprehensively testing devices and reducing the total costs associated with testing by using our Semiconductor Test systems to:

Our FLEX Test Platform architecture advances our core technologies to produce test equipment that is designed for high efficiency multi-site testing. Multi-site testing involves the simultaneous testing of many devices in parallel. Leading semiconductor manufacturers are using multi-site testing to significantly improve their “cost of test” economics. The FLEX Test Platform architecture addresses customer requirements through the following key capabilities:

FLEX Test Platform purchases are made by IDMs, OSATs, Foundries and Fabless customers. The FLEX Test Platform has become a widely used test solution at OSATs by providing versatile testers that can handle the widest range of devices, allowing OSATs to leverage their capital investments. The broad consumer, automotive and broadband markets have historically driven most of the device volume growth in the semiconductor industry. More recently data centers and AI are the drivers for the FLEX Test Platform and specifically the UltraFLEXplus tester, the newest member of the UltraFLEX family, which uses the new PACETM architecture to deliver superior economics and fast time to market for complex compute devices.

Our J750™ test system shares the IG-XL software environment with the family of FLEX Test Platform systems. The J750 is designed to handle high volume semiconductor devices, such as microcontrollers, that are central to the functionality of almost every consumer electronics product, from small appliances to automobiles. J750 test systems combine compact packaging, high throughput and ease of production test. We extended the J750 platform technology to create the IP750 Image Sensor™ test system. The IP750 is focused on testing image sensor devices used in smartphones, automobiles and other imaging products. We have continued to invest in the J750 platform with new instrument releases that bring new capabilities to existing market segments and expand the J750 platform to new devices that include high end microcontrollers and the latest generation of image sensors.

Our Magnum platform addresses the requirements of mass production test of memory devices for flash, DRAM, and HBM memory. Flash, DRAM and HBM memory are widely used core building blocks in modern electronic products finding wide application in consumer, industrial, and computing equipment. Our Magnum 7 solution is designed for parallel memory test in the flash, DRAM, HBM and multi-chip package markets while our Magnum EPIC platform, gives us full product coverage of the memory test market with final test capabilities.

Our ETS platform is used by semiconductor manufacturers and assembly and test subcontractors, primarily in the analog/mixed signal markets that cover cost sensitive applications. Our proprietary SmartPin™ technology enables high efficiency multi-site testing on an individual test system permitting greater test throughput. Semiconductors tested by ETS platform systems are incorporated into a wide range of products in historically high-growth markets including mobile devices, automotive electronics, computer peripherals, data center platforms, and notebook and desktop computers. The Eagle platform includes the ETS-88 which is a high performance multi-site production test system designed to test a wide variety of high volume power and precision devices including Silicon Carbide (“SiC”) and Gallium Nitride (“GaN”) power devices used in vehicle electrification and data center power delivery and conversion. The ETS-800, a high performance multi-site production test system, is used to test high complexity power devices in automotive, industrial and consumer applications.

The Integrated System Test group is comprised of our system level test (“SLT”) testers and our HDD and SSD testers. Our SLT testers for the semiconductor production market are used to test devices following wafer and package test. SLT testers address customer requirements related to factory density, throughput and thermal performance. HDD products address the high throughput and automated manufacturing test requirements of hard disk drive and semiconductor manufacturers. Our HDD products address the client and enterprise storage markets. The client market is driven by the needs of desktop, laptop, and external HDD storage products. The enterprise market is driven by the needs of data centers and cloud storage.

Robotics

Our Robotics segment is comprised of two product lines, our cobot arms under Universal Robots branding and our autonomous mobile robots under Mobile Industrial Robots branding.

Since introducing the world's first commercially viable cobot in 2008, Teradyne Robotics has sold over 110,000 cobots worldwide and has developed a product portfolio reflecting a range of reaches and payloads. All models, including the UR8 Long, UR15, UR18, UR20, UR30, UR3e, UR7e, UR12e, and UR16e are built to withstand a wide range of industrial environments, and can be easily integrated into existing production setups, providing a number of game-changing benefits:

An extensive ecosystem (“UR+”) has grown around the company's cobot technology, creating innovation and choice for customers and a wide range of components, kits and solutions to suit numerous applications.

Autonomous mobile robots (“AMRs”) are used in the manufacturing and logistics segments. Teradyne Robotics’ AMRs enhance productivity, offering a high return on investment by streamlining workforce efficiency, reducing lead times, and improving workplace safety. These AMRs, which include MiR250, MiR600, and MiR1350, as well as the MiR1200 Pallet Jack, operate autonomously, eliminating the need for traditional guidance infrastructure. Teradyne Robotics’ has sold over 11,000 AMRs globally.

All models can be easily integrated into existing production environments, differentiated by their:

Product Test

Our Product Test segment consists of test equipment and service offerings for high performance electronic and photonic assemblies, sub-assemblies, modules, and components. Customers are broad, including but not limited to, companies in the high performance computing and data center, automotive/industrial, defense/aerospace, and consumer electronics industries. Our offerings include high-performance test systems, subsystems, instruments, and services. In addition to support of high volume manufacturing test, the Product Test solutions aid customers in the development, verification, and scaling of next-generation technologies.

Sales and Distribution

In each of the years, 2025, 2024 and 2023, our five largest direct customers in aggregate accounted for 44%, 36%, and 32% of our consolidated revenues, respectively.

Teradyne typically has a specifying customer such as an OEM, IDM, or Fabless company, who chooses platforms and drives demand, and a purchasing customer who actually places the order and receives the equipment. In different cases, the specifying and purchasing customers have more influence in the purchase decision. In 2025, we had two customers who specified greater than 10% of our consolidated revenues and one additional customer who directly purchased more than 10% of our consolidated revenues. The two specifying customers were both customers of our Semiconductor Test and Product Test segments and drove 12% and 10% of consolidated revenues. The additional direct customer, a customer of our Semiconductor Test segment, accounted for 19% of consolidated revenues including certain revenues specified by other customers.

In 2024, we estimate one customer of our Semiconductor Test and Wireless Test segments, specified approximately 13% of our consolidated revenues. In 2023, one customer of our Semiconductor Test segment, accounted for approximately 10% of our consolidated revenues. The loss of, or significant decrease in demand from a significant OEM, IDM, or Fabless customer, or any of our five largest direct customers, could have a material adverse effect on our business, results of operations and financial condition.

We have sales and service offices located throughout North America, Central America, Asia and Europe. We sell in these areas predominantly through a direct sales force, except for Robotics products, which are sold principally through distributors and OEMs. Our manufacturing activities for our test businesses are primarily conducted through subcontractors and outsourced contract manufacturers with significant operations in Malaysia. The manufacturing activities for our Robotics businesses are done primarily in our production facilities in Denmark and the U.S.

Sales to customers outside the United States were 89%, 87%, and 84%, respectively, of our consolidated revenues in 2025, 2024 and 2023. Sales are attributed to geographic areas based on the location of the customer site.

See also “Item 1A: Risk Factors” and Note V: “Segment, Geographic, and Significant Customer Information” in Notes to Consolidated Financial Statements.

Competition

We face significant competition throughout the world in each of our reportable segments. Competitors in the Semiconductor Test segment include, among others, Advantest Corporation, SPEA S.p.A., and Cohu, Inc.

Competitors in our Robotics segment include manufacturers of traditional industrial robots such as KUKA Robotics Corporation, ABB, FANUC, Staubli and Yaskawa Electric Corporation, companies with emerging collaborative robot offerings such as Techman, Doosan, Jaka, and AUBO Robotics, and manufacturers of autonomous mobile robots in the material handling space such as Omron, Rockwell Automation, Junion, HikRobot, Agilox, and KION.

Competitors in our Product Test operating segment include, among others, Keysight Technologies, Test Research, Inc.,

Rohde & Schwarz GmbH & Co. KG, Anritsu Company, National Instruments Corporation, Welzek and iTest.

Some of our competitors may have greater financial and other resources to pursue engineering, manufacturing, marketing, and distribution of their products. We also face competition from emerging Asian companies and from internal supply at several of our customers. Some of our competitors have introduced or announced new products with certain performance characteristics which may be considered equal or superior to those we currently offer. We expect our competitors to continue to improve the performance of their current products and to introduce new products or new technologies that provide improved cost of ownership and performance characteristics. See also “Item 1A: Risk Factors.”

Backlog

Our backlog at any particular date is not necessarily indicative of the actual sales for any succeeding period because our customers may delay delivery of products or cancel orders without advanced notice, subject to possible cancellation penalties. Delays in delivery schedules or cancellations of backlog during any particular period could have a material adverse effect on our business, financial condition or results of operations.

Raw Materials

Our products contain electronic and mechanical components that are provided by a wide range of suppliers. Some of these components are standard products, while others are manufactured to our specifications. We have experienced delays in obtaining timely delivery of certain components. These delays have impacted and may continue to impact the manufacturing of certain products and the timing of delivery of those products to our customers. While the majority of our components are available from multiple suppliers, certain items are obtained from sole sources. We may experience a temporary adverse impact if any of our sole source suppliers delay or cease to deliver products.

Intellectual Property and Licenses

The development of our products, both hardware and software, is based in significant part on proprietary information, our brands and technology. We protect our rights in proprietary information, brands and technology through various methods, such as:

However, these protections might not be effective in all circumstances. Competitors might independently develop similar technology or exploit our proprietary information and our brands in countries where we lack enforceable intellectual property rights or where enforcement of such rights through the legal system provides an insufficient deterrent. Also, intellectual property protections can lapse or be invalidated through appropriate legal processes. We do not believe that any single piece of intellectual property or proprietary rights is essential to our business.

Human Capital

We believe that our future success depends upon our continued ability to attract, develop, and retain a high-performance workforce. As of December 31, 2025, we employed approximately 6,600 employees, of whom approximately 2,200 were employed in the United States. Our largest non-US employee populations are in the Philippines (19%), Denmark (10%), Costa Rica (7%), China (7%) and Taiwan (5%). We also leverage contractors to provide flexibility for our business and manufacturing needs. As of December 31, 2025, we worked with approximately 600 contractors globally. Since the inception of our business, we have experienced no work stoppages or other labor disturbances.

We are an equal opportunity employer committed to making employment decisions without regard to race, religion, ethnicity or national origin, gender, sexual orientation, gender identity or expression, age, disability, protected veteran status or any other characteristics protected by law.

Corporate Culture

Our core values are conducting business with honesty and integrity, collaborating with our colleagues as a company without doors, and partnering with our customers every step of the way, because customers count on us.

We strive to foster a positive work environment that helps employees thrive. It is a priority for us to ensure that our people feel inspired, supported, safe and able to achieve their personal best. We are committed to equality through nondiscrimination, harassment prevention and pay equity policies. We value a respectful work environment where all employees enjoy challenging assignments, development opportunities and a safe, positive culture.

We are committed to conducting business in a responsible manner, with strategic operational policies, procedures and values that support transparency, sustainability and legal compliance. We ensure ethical operations and business commitments through robust governance of the company’s code of conduct and global environmental, health and safety programs.

Competitive Pay and Benefits

The primary objective of our compensation program is to provide a compensation and benefits package that will continue to attract, retain, motivate and reward high performing employees who operate in a highly competitive environment. We seek to achieve this objective by linking a meaningful portion of compensation to company and business unit performance. We enable employees worldwide to share in the success of the company through various programs including a stock purchase program, equity compensation and bonus plans. We seek competitiveness and fairness in total compensation with reference to peer comparisons and internal equity.

In addition to providing our employees with competitive compensation packages, we offer benefits designed to meet the needs of employees and their families worldwide, including paid time off, parental leave, bereavement leave, health insurance coverage, flexible work arrangements, contributions to retirement savings, and access to employee assistance and work-life programs.

Employee Development and Training

We believe that employee development and training is a key factor in attracting, motivating, improving and retaining a strong, competitive global workforce. We provide continual development to our employees focused on developing their job skills and competencies. Examples include new manager competencies like giving feedback and coaching, and training in software development tools and project management. Our employees worldwide also receive annual performance reviews and are involved in setting goals for their own development and performance. Employees and managers look back on the previous year, review career development plans and create goals for the next year.

We are committed to recruiting and developing talent at the collegiate level to help advance Science, Technology, Engineering and Mathematics (“STEM”) education for the future workforce. For example, our paid internships and entry-level positions offer real-world experience, and our co-op program offers higher education students a unique learning opportunity as students alternate one semester in a work assignment and one semester in the classroom. Additionally, we offer reimbursement for educational courses

related to an employee’s work or as part of a degree program, including tuition, lab fees and books. We also offer a scholarship program for employees with college-age children, step-children and grandchildren.

Employee Engagement

We conduct regular employee surveys to check in with our global workforce and obtain input on a number of topics. The feedback we receive from these surveys helps us assess employee sentiment, identify areas of improvement and guides our decision-making as it relates to people management. In addition, our CEO and other executives meet with employees worldwide on a frequent basis through exchange meetings and quarterly webcasts. The exchange meetings allow the executives to directly interact with a small group of employees, while the global webcasts enable all employees to engage with senior leaders and ask questions in an open Q&A session.

We also offer employees worldwide an opportunity to network and connect with colleagues who share similar interests. This includes global groups such as New Employees to Teradyne, Woman’s Affinity Group, Veterans, Blue and Green (for team members that are committed to the environment), Runner’s affinity group and LGBTQ+ advocates. Each of these groups is open to any employee who is interested and would like to join.

Talent Communities

At Teradyne, we believe our success is deeply connected to the strength of the communities where we live and work. We are committed to building an organization by investing in talent development through education, philanthropy, and strategic partnerships. Our Talent Community initiatives are designed to foster opportunity and innovation across all stages of the educational and professional journey.

We have a tradition of amplifying the charitable actions of our employees and responding to the needs of the communities where we work. To make it easier for employees to support charitable activities and magnify the impact of support, we established a formal matching gift program, “Teradyne Gives.” The program matches up to $1,000 per year of an employee’s donations to charities of their choosing, selected from a wide range of qualified non-profit organizations.

Additionally, advancing education for future generations is a primary initiative at Teradyne. We seek to increase the number of STEM graduates worldwide through our support of STEM programs at the middle, high school and collegiate level. We also donate test equipment and robots to colleges, universities, and vocational programs.

Health and Safety

The health and safety of our employees worldwide is our highest priority. We are committed to complying with all applicable regulatory health and safety requirements wherever we operate. We conduct internal audits, regular reviews and monitoring of regulations to ensure compliance with laws and regulations at the local, state, province and country levels. We ensure workers are provided with the knowledge to perform their jobs safely by deploying mandatory environmental, health and safety training. We also require contractors to complete safety training prior to working at any Teradyne site. We monitor, track and report common safety metrics such as accidents, near misses and illness. Our injury and illness rate is below the industry average. We also provide our employees with a flexible and adjustable workspace, which includes reviewing ergonomics issues in the workplace, educating employees to self-identify risks and ensuring they have the work environment they need to do their jobs safely and effectively.

Regulatory Environment

We are subject to various federal, state, and local government laws and regulations relating to international trade, business conduct, the protection of employee health and safety and the environment.

We accrue for all known environmental liabilities when it becomes probable that we will incur cleanup costs and those costs can reasonably be estimated. Estimated environmental costs are not expected to materially affect the financial position or results of our operations in future periods. However, estimates of future costs are subject to change due to protracted cleanup periods and changing environmental remediation laws and regulations.

We are subject to U.S. and foreign laws and regulations that limit and restrict the export of some of our products and services and may restrict our transactions with certain customers, business partners and other persons. In certain circumstances, export control and economic sanctions or regulations prohibit the export of certain products, services, and technologies, and in other circumstances we are required to obtain an export license, which may not be approved, before exporting the controlled item. Additionally, these laws and regulations may impose restrictions on the end-use of our products, services, and technologies, including prohibitions on their use

in connection with nuclear, missile, chemical, or biological weapons activities, military applications, or other restricted purposes. For example, we must comply with current U.S. Department of Commerce export control regulations restricting transactions with certain customers in China. We must also comply with export restrictions and laws imposed by other countries affecting trade and investments. We maintain an export compliance program but there are risks that the compliance controls could be circumvented, exposing us to legal liabilities. Compliance with these laws has limited our sales and likely will continue to limit sales to certain customers in the future. Changes in, and responses to, U.S. trade policy could reduce the competitiveness of our products and cause our sales to drop, which could have a material adverse effect on our business, financial condition or results of operations.

Item 1A: Risk Factors

Descriptions of risks associated with our business are set forth below. Some of these risks are highlighted in the following discussion and in Management's Discussion and Analysis of Financial Condition and Results of Operations, Legal Proceedings, Controls and Procedures and Quantitative and Qualitative Disclosures About Market Risk of this Annual Report. The risks described below are not the only risks that we face. Additional risks and uncertainties not currently known to us or that we currently deem to be immaterial also may materially adversely affect our business, financial condition and/or operating results.

Risks Associated with Teradyne’s Markets

Our business is impacted by global and industry-specific economic cycles, which are difficult to predict, and actions we have taken or may take to offset these cycles may not be sufficient.

Capital equipment providers in the electronics, semiconductor industries and robotics, such as Teradyne, have, in the past, been negatively impacted by both sudden slowdowns in the global economies and recurring cyclicality within those industries. These cycles, which can be driven by broad changes to Semiconductor buying patterns, or to specific markets within the Semiconductor industry, have resulted in periods of over-supply; a trend we believe will continue to occur. Our business and results of operations depend, in significant part, upon capital expenditures of manufacturers of semiconductors, electronics, and other industrial products, which in turn depend upon the current and anticipated market demand for those products. Disruption or deterioration in global or industry-specific economic conditions may reduce customer purchases of our products, thereby reducing our revenues and earnings. In addition, such adverse changes in economic conditions, and resulting slowdowns in the market for our products, may, among other things, result in increased price competition for our products, increased risk of excess and obsolete inventories, increased risk in the collectability of our accounts receivable from our customers, potential reserves for credit losses and write-offs of accounts receivable, increased risk of restructuring charges, and higher operating costs as a percentage of revenues, which, in each case and together, adversely affect our operating results. We are unable to predict the likely duration, frequency and severity of disruptions in financial markets, credit availability, and adverse economic conditions throughout the world, and we cannot ensure that the level of revenues or new orders for a fiscal quarter will be sustained in subsequent quarters. We have taken actions to address the effects of general economic variability and recurring industry cyclicality, including implementing cost control and reduction measures. We cannot predict whether these measures will be sufficient to offset global or market-specific disruptions that might affect our businesses and we may need to take additional or different measures in the future.

We are subject to intense competition.

We face significant competition throughout the world in each of our reportable segments. Some of our competitors have substantial financial and other resources to pursue engineering, manufacturing, marketing and distribution of their products. In addition, we are subject to trade regulations imposed by the United States government, which may not impact some of our competitors. We also face competition from emerging Asian companies and internal development at several of our customers. Some of our competitors have introduced or announced new products with certain performance characteristics that may be considered equal or superior to those we currently offer. We expect our competitors to continue to improve the performance of their current products and to introduce new products or new technologies that provide improved cost of ownership and performance characteristics. In addition, the semiconductor industry has experienced significant consolidation over the past several years. Consolidation among our competitors or customers could lead to a changing competitive landscape, which could negatively impact our competitive position. If in the future we are unable to maintain our competitive position, we could experience downward pressure on prices, fewer customer orders, reduced margins, the inability to take advantage of new business opportunities and a loss of market acceptance of our products, any of which could have a material adverse effect on our revenues and results of operations.

The market for our products is concentrated, and our business depends, in part, on obtaining orders from a few significant customers.

The market for our products is concentrated with a limited number of significant global customers accounting for a substantial portion of the purchases of test equipment. In each of the years, 2025, 2024 and 2023, our five largest direct customers in aggregate accounted for 44%, 36% and 32% of consolidated revenues, respectively.

In 2025, we had two customers who specified greater than 10% of our consolidated revenues and one additional customer who directly purchased more than 10% of our consolidated revenues. The two specifying customers drove 12% and 10% of consolidated revenues. The additional direct customer accounted for 19% of consolidated revenues including certain revenues specified by our 10% specifiers.

If we were to lose any of our significant customers, if our products fail to meet changes in customers’ demands or if we suffer a material reduction in our customers’ purchase orders, our revenue could decline and our operating results and financial condition could be materially and adversely affected. We would have no or limited contractual recourse if our significant customers decided to stop buying and using our products with limited advance notice to us.

Customer consolidation could affect our operating results.

There has been a trend toward customer consolidation in the semiconductor industry through business combinations, including mergers, asset acquisitions and strategic partnerships. If this trend continues, it could make us more dependent on fewer customers who may be able to exert increased pressure on our prices and other contract terms and could increase the portion of our total sales concentration for any single customer. Customer consolidation activity could also reduce the demand for our products and services if such customers streamline research and development or operations, reduce purchases or delay purchasing decisions. These outcomes could negatively impact our operating results and financial condition.

If we fail to develop new technologies to adapt to our customers’ needs or if our customers fail to accept our new products, our revenues will be adversely affected.

We believe that our technological position depends primarily on the technical competence and creative ability of our engineers. In a rapidly evolving market, such as ours, the development or acquisition of new technologies, commercialization of those technologies into products and market acceptance and customer demand for those products are critical to our success. In the electronics, semiconductor, and robotics industries, products are often replaced by more technologically advanced substitutes and, as demand for older technology falls, the price at which such products can be sold drops. If we cannot advance new technologies to meet our customers’ demands, our revenues and financial condition may be adversely impacted. Successful product development or acquisition, introduction and acceptance depend upon a number of factors, including:

Risks Associated with Operating a Global Business

We are subject to risks of operating internationally.

A significant portion of our consolidated revenues is derived from customers outside the United States. Our international sales and operations are subject to significant risks and difficulties, including:

In addition, an increasing portion of our products and the products we purchase from our suppliers are sourced or manufactured in foreign locations, including Malaysia and Denmark, and a large portion of the devices our products test are fabricated and tested by foundries and subcontractors in Taiwan, China, Korea and other parts of Asia. As a result, we are subject to a number of economic and other risks, particularly during times of political, health or financial instability in these regions. Disruption of manufacturing or supply sources in these international locations could materially adversely impact our ability to fill customer orders and potentially result in lost business.

We are subject to risks associated with doing business in China.

In addition to the risks associated with the tariffs and trade regulations detailed below, we are subject to the following risks associated with doing business in China:

The foregoing risks and the ongoing geopolitical tensions and economic uncertainty between the United States and China and the unknown impact of current and future Chinese rules and regulations, may cause increased costs, as well as restrictions on our ability to sell, or a decreased demand from customers to purchase, our products, which could harm our business, financial condition and operating results.

Risks Related to Teradyne’s Finances

We may not fully realize the benefits of our acquisitions or strategic alliances.

Since 2015, we have completed the acquisitions of Universal Robots (2015), Energid and MiR (2018), Lemsys and AutoGuide (2019), and most recently, AET and Quantifi in 2025. Additionally, in May 2024, we closed on our strategic partnership agreement with Technoprobe which included our acquisition of 10% of the equity in Technoprobe. We may not be able to realize the benefits of acquiring or successfully growing these businesses. We may continue to acquire additional businesses, form strategic alliances, or create joint ventures with third parties that we believe will complement or augment our existing businesses. We may not be able to realize the expected synergies and cost savings from the integration with our existing operations of other businesses or technologies that we may acquire. In addition, the integration process for our acquisitions may be complex, costly and time consuming and include unanticipated issues, expenses, and liabilities. We may have difficulty in developing, manufacturing, and marketing the products of a newly acquired company in a manner that enhances the performance of our combined businesses or product lines and allows us to realize value from expected synergies.

Following an acquisition, we may not achieve the revenue or net income levels that justify the acquisition. Acquisitions may also result in one-time charges (such as acquisition-related expenses, write-offs or restructuring charges) or in the future, impairment of goodwill or acquired intangible assets, or adjustments to contingent consideration liabilities that adversely affect our operating results. We review our amortizable intangible assets for impairment at the reporting unit level when events or changes in circumstances indicate the carrying value may not be recoverable and we test goodwill for impairment at least annually. Factors that may be considered in assessing whether goodwill or intangible assets may be impaired include a decline in our stock price or market capitalization, reduced estimates of reporting unit future cash flows and slower growth rates in our industries. We have in the past recorded, and may in the future be required to record, a significant charge in our consolidated financial statements during the period in which any impairment of our goodwill or amortizable intangible assets is determined, negatively affecting our financial position and results of operations. Our valuation methodology for assessing impairment requires management to make judgments and assumptions based on experience and to rely heavily on projections of future operating performance. Because we operate in highly competitive environments, projections of our future operating results and cash flows may vary significantly from our actual results.

Additionally, we may fund acquisitions of new businesses, strategic alliances, or joint ventures by utilizing our cash, incurring debt, issuing shares of our common stock, or by other means. We may also face restrictions pursuant to the terms of an acquisition or strategic alliance agreement.

We may incur higher tax rates than we expect and may have exposure to additional international tax liabilities and costs.

We are subject to paying income taxes in the United States and other countries where we operate. Our effective tax rate is dependent on where our earnings are generated and the tax regulations and the interpretation and judgment of administrative tax or revenue authorities in the United States and other countries. We have pursued a global tax strategy that could be adversely affected by the mix of earnings and tax rates in the countries where we operate, changes to tax laws (including but not limited to Pillar Two), tax regulations or an adverse tax ruling by administrative authorities. Because of increasing focus by government taxing authorities on multinational corporations, the tax laws of certain countries in which we do business could change on a prospective or retroactive basis, and as a result our liabilities for taxes, interest and penalties, could significantly increase and adversely affect our financial results. We are also subject to tax audits in the countries where we operate. Any material change in our tax liability resulting from changes in tax laws, tax regulations, administrative rulings or audits from an administrative tax or revenue authority could negatively affect our financial results.

As a multinational corporation, we are subject to income taxes as well as non-income-based taxes, in both the United States and various foreign jurisdictions. In certain foreign jurisdictions, we qualify for tax incentives and tax holidays based on our ability to meet, on a continuing basis, various tests relating to our employment levels, research and development expenditures and other qualification requirements in a particular foreign jurisdiction. If we fail to qualify or fail to remain qualified for certain foreign tax incentives and tax holidays, we may be subject to further taxation or an increase in our effective tax rate which would adversely impact our financial results. In December 2025, we entered into an agreement with the Singapore Economic Development Board which extended our Singapore tax holiday under substantially similar terms to the agreement which expired on December 31, 2025. The new tax holiday is scheduled to expire on December 31, 2035.

The tax savings attributable to the Singapore tax holiday for the years ended December 31, 2025, 2024 and 2023 were $21.6 million or $0.14 per diluted share, $17.1 million or $0.10 per diluted share, and $1.4 million or $0.01 per diluted share, respectively. These tax savings may not be achievable in subsequent years due to changes in Singapore’s tax laws or the issuance of new global minimum tax laws.

We have significant guarantees, indemnification, and customer confidentiality obligations.

From time to time, we make guarantees to customers regarding the delivery, price and performance of our products and guarantee certain indebtedness, performance obligations or lease commitments of our subsidiary and affiliate companies. We also have agreed to provide indemnification to our officers, directors, employees and agents, to the extent permitted by law, arising from certain events or occurrences, while the officer, director, employee or agent, is or was serving at our request in such capacity. Additionally, we have confidentiality obligations to certain customers, which if breached would require the payment of significant penalties. If we become liable under any of these obligations, it could materially and adversely affect our business, financial condition or operating results. For additional information see Note O: “Commitments and Contingencies” in Notes to Consolidated Financial Statements.

We may discontinue or reduce our quarterly cash dividend or share repurchase program.

Future cash dividends and share repurchases are subject to the discretion of our Board of Directors and will depend, among other things, upon our earnings, capital requirements and financial condition. We are not required to do either and may reduce or eliminate our cash dividend or share repurchase program in the future. The amount and frequency of our share repurchases may fluctuate and the reduction or elimination of our cash dividend or our share repurchase program could adversely affect the market price of our common stock or reduce our cash reserves.

We have incurred indebtedness and may incur additional indebtedness.

On May 1, 2020, we entered into a three-year, senior secured revolving credit facility of up to $400.0 million (the “Credit Facility”). On December 10, 2021, the credit agreement was amended to extend the maturity date of the Credit Facility to December 10, 2026. On October 5, 2022, the credit agreement was amended to increase the amount of the Credit Facility to $750.0 million from $400.0 million. The amended credit agreement provides that, subject to customary conditions, we may seek to obtain from existing or new lenders the available incremental amount under the credit facility, not to exceed the greater of $200.0 million or 15% of consolidated EBIDTA. We could borrow funds under this Credit Facility at any time for general corporate purposes and working capital. On September 4, 2025, September 19, 2025, and October 7, 2025, Teradyne borrowed a combined $250.0 million under the Credit Facility to support the ramp-up in manufacturing capabilities for Semiconductor Test and the strategy to return cash to shareholders through share repurchases, dividends, and inorganic growth opportunities. On December 31, 2025, we repaid $50 million of the outstanding borrowings. Further, we may incur significant additional secured and unsecured indebtedness in the future.

Our outstanding and any additional indebtedness, among other things, could:

Restrictive covenants in the agreement governing our senior secured revolving credit facility may restrict our ability to pursue business strategies.

The agreement governing our Credit Facility limits our ability, among other things, to incur additional secured indebtedness; sell, transfer, license or dispose of assets; consolidate or merge; enter into transactions with our affiliates; and incur liens. In addition, our Credit Facility contains financial and other restrictive covenants that limit our ability to engage in activities that may be in our long-term best interest, such as, subject to permitted exceptions, making capital expenditures in excess of certain thresholds, making investments, loans and other advances, and prepaying any additional indebtedness while our indebtedness under our Credit Facility is outstanding. Our failure to comply with financial and other restrictive covenants could result in an event of default, which if not cured or waived, could result in the lenders requiring immediate payment of all outstanding borrowings or foreclosing on collateral pledged to them to secure the indebtedness.

We may not be able to pay our debt and other obligations.

If our cash flows are inadequate to meet our obligations, we could face substantial liquidity problems. If we are unable to generate sufficient cash flows or otherwise obtain funds necessary to make required payments on our Credit Facility or certain of our other obligations, we would be in default under the terms thereof, which would permit the holders of those obligations to accelerate their maturity and also could cause defaults under future indebtedness we may incur. Any such default could have a material adverse effect on our business, prospects, financial position and operating results.

Foreign currency exchange rates and fluctuations in those rates may affect the Company’s ability to realize projected growth rates in its sales and earnings.

Our financial statements are denominated in U.S. dollars. The majority of our Robotics revenue is denominated in foreign currencies, and the strengthening of the U.S. dollar would negatively affect Robotics revenue growth. In addition, many of our liabilities, including our outstanding indebtedness, and certain other cash payments, such as share repurchases, are payable in the United States in U.S. dollars, while a portion of our cash is generated outside the United States. As a result, currency fluctuations and changes in foreign exchange regulations can have a material adverse effect on our liquidity and financial condition.

Adverse developments affecting the financial services industry, including events or risks involving liquidity, defaults or non-performance by financial institutions, could have a material adverse effect on our business, financial condition or results of operations.

We hold cash balances in several large financial institutions significantly in excess of the Federal Deposit Insurance Corporation (“FDIC”) and global insurance limits. If banks and financial institutions with whom we have banking relationships enter receivership or become insolvent in the future, we may be unable to access, and we may lose some or all of our existing cash, cash equivalents and investments to the extent those funds are not insured or otherwise protected by the FDIC. There is no guarantee that the FDIC or any other global insurer will provide access to uninsured funds in the future in the event of the closure of any other banks or financial institutions in a timely fashion or at all. Any inability to access or delay in accessing these funds could adversely affect our business, financial position, and liquidity.

Our stock price has been subject to fluctuations, and will likely continue to be subject to fluctuations, which may be volatile and due to factors beyond our control.

The market price of our common stock is subject to wide fluctuations in response to various factors, some of which are beyond our control. In addition to the factors discussed in this “Risk Factors” section and elsewhere in this report, factors that could cause fluctuations in the market price of our common stock include the following:

In addition, the market for technology stocks and the stock markets in general have experienced extreme price and volume fluctuations. Stock prices of many technology companies have fluctuated in a manner unrelated or disproportionate to the operating performance of those companies. In the past, stockholders have instituted securities class action litigation following periods of market volatility. If we were to become involved in securities litigation, it could subject us to substantial costs, divert resources and the attention of management from our business, and adversely affect our business, results of operations, financial condition, and cash flows. A decline in the value of our common stock, including as a result of one or more factors set forth above, may result in substantial losses for our stockholders.

Risks Related to Operations

Our operating results are likely to fluctuate significantly.

Our operating results are affected by a wide variety of factors that could materially adversely affect revenues or profitability. The following factors could impact future operations:

As a result of the foregoing and other factors, we have experienced and may continue to experience material fluctuations in future operating results on a quarterly or annual basis which could materially and adversely affect our business, financial condition, operating results or stock price.

If our suppliers do not meet product or delivery requirements, we could have reduced revenues and earnings.

If any of our suppliers were to cancel contracts or commitments or fail to meet the quality or delivery requirements needed to satisfy customer orders for our products, we could lose time-sensitive customer orders, have significantly decreased revenues and earnings and be subject to contractual penalties, which would have a material adverse effect on our business, results of operations and financial condition. In addition, we rely on contract manufacturers for certain of our products, and our ability to meet customer orders for those products depends upon the timeliness and quality of the work performed by these subcontractors, over whom we do not exercise any control.

To a certain extent, we are dependent upon the ability of our suppliers and contract manufacturers to help meet increased product or delivery requirements. It may be difficult for certain suppliers to meet delivery requirements in a period of rapid growth, therefore impacting our ability to meet our customers’ demands.

Our suppliers are subject to trade regulations, including tariffs and export restrictions imposed by the United States Government and by the governments of other countries. These regulations could impact our suppliers’ ability to provide us with components for our products or could increase the price of those components.

We rely on the financial strength of our suppliers. The loss of suppliers either as a result of financial viability, bankruptcy or otherwise could have a material adverse effect on our business, results of operations or financial condition.

The global supply shortage of electrical components and inflationary cost increases impact our ability to meet customer demand and could adversely affect our business and financial results.

The global supply shortage of electrical components, including semiconductor chips, impacted our supply chain in 2023. As a result, we experienced and may experience in the future, increases in our lead times and costs for certain components for certain products. We may also experience delays in the delivery of some orders placed by our customers. In addition, inflationary pressures have in the past contributed to increased costs for product components along with wage inflation which yielded a minimal impact to the costs of our products, gross margin and profit for the year. In an effort to mitigate these risks, we may in some cases, incur higher costs due to investment in supply chain resiliency and to secure available inventory or have extended or non-cancellable purchase commitments with semiconductor suppliers, which introduces inventory risk if our forecasts prove inaccurate. We have also sourced components from additional suppliers and multi-sourced and pre-ordered components and finished goods inventory in some cases in an effort to reduce the impact of the adverse supply chain conditions we have experienced in the past. However, if we are unable to secure manufacturing capacities from our current or new suppliers and contract manufacturers, on acceptable terms or at all, or successfully manage our purchase commitments and inventory for components, our ability to deliver our products to our customers in the desired quantities, at competitive prices or in a timely manner may be negatively impacted. We may also not be fully able to pass additional costs on to our customers, which could have a negative impact on our results of operations and financial condition.

Our operations may be adversely impacted if our outsourced contract manufacturers or service providers fail to perform.

We depend on Flex Ltd. (“Flex”) to manufacture and test our FLEX and J750 family of products from its facility in Malaysia; Plexus Corp. (“Plexus”) to manufacture and test our FLEX and Magnum products from its facilities in Malaysia and Thailand and our ETS family of products from its facility in Malaysia; SAM Meerkat to manufacture and test our storage test family of products from its facilities in Malaysia and Thailand and on other contract manufacturers to manufacture other products. If for any reason these contract manufacturers cannot provide us with these products in a timely fashion, or at all, we may not be able to sell these products to our customers until we enter a similar arrangement with an alternative contract manufacturer.

If we experience a problem with our supply of products from Flex, Plexus, SAM Meerkat, or our other contract manufacturers, it may take us significant time to either manufacture the product or find an alternate contract manufacturer, which could result in substantial expense and disruption to our business. We have, however, significantly invested in our internal manufacturing for FLEX products in our Cebu site.

We have also outsourced certain general and administrative functions to reputable service providers, many of which are in foreign countries, sometimes impacting communication with them because of language and time differences. Their presence in foreign countries also increases the risk they could be exposed to political, conflict and cybersecurity risk. Additionally, there may be difficulties encountered in coordinating the outsourced operations with existing functions and operations. If we fail in successfully

coordinating and managing the outsourced service providers, it may cause an adverse effect on our operations, which could have a material adverse effect on our business, results of operations or financial condition.

Our business may suffer if we are unable to attract and retain key employees.

Competition for employees with skills we require is intense in the high technology industry. We expect intense competition for employees will continue in 2026. Our success will depend on our ability to attract and retain key technical employees. The loss of one or more key or other employees, a decrease in our ability to attract additional qualified employees, or the delay in hiring key personnel could each have a material adverse effect on our business, results of operations or financial condition. In addition, existing or new immigration laws, policies or regulations in the U.S. may limit the pool of available talent in the highly skilled technical labor market.

Our operations, and the operations of our customers and suppliers, are subject to risks of natural catastrophic events, severe weather, widespread health epidemics, acts of war, terrorist attacks and the threat of domestic and international terrorist attacks, any one of which could result in cancellation of orders, delays in deliveries or other business activities, or loss of customers and could negatively affect our business and results of operations. In certain cases, our insurance policy may be insufficient to cover losses.

Our business is international in nature, with our sales, service and administrative personnel and our customers and suppliers located in numerous countries throughout the world. Our operations, and those of our customers and suppliers, are subject to disruption for a variety of reasons, including work stoppages, acts of war and geopolitical conflict, terrorism, health epidemics, fires, earthquakes, hurricanes, typhoons, volcanic eruptions, energy shortages, telecommunication failures, tsunamis, flooding or other natural disasters, including as a result of global climate change. Any disruptions from these events could require substantial expenditures and recovery time to fully resume operations and could also have a material adverse effect on our operations and financial results to the extent that losses are uninsured or exceed insurance recoveries, and to the extent that such disruptions adversely impact our relationships with our customers. Additionally, any such disruption could materially increase our costs and expenses as well as cause delays in, among other things, shipments of products to our customers, our ability to perform services requested by our customers, or the installation and acceptance of our products at customer sites. Any of these conditions could have a material adverse effect on our business, financial condition or results of operations.

Risks Related to Intellectual Property (“IP”) and Cybersecurity

Third parties may claim we are infringing their intellectual property and we could suffer significant litigation costs, licensing expenses or be prevented from selling our products.

We have been sued for patent infringement in the past and receive notifications from time to time that we may be in violation of patents held by others. An assertion of patent infringement against us, if successful, could have a material adverse effect on our ability to sell our products or it could force us to seek a license to the intellectual property rights of others or alter such products so that they no longer infringe the intellectual property rights of others. A license could be very expensive to obtain or may not be available at all. Similarly, changing our products or processes to avoid infringing the rights of others may be costly or impractical. Additionally, patent litigation has in the past and could in the future require a significant use of management resources and involve a lengthy and expensive defense, even if we eventually prevail. If we do not prevail, we might be forced to pay significant damages, obtain licenses, modify our products, or stop making our products; each of which could have a material adverse effect on our financial condition, operating results or cash flows.

If we are unable to protect our IP, we may lose a valuable asset or may incur costly litigation to protect our rights.

We protect the technology that is incorporated in our products in several ways, including through patent, copyright, trademark and trade secret protection and by contractual agreement. However, even with these protections, our IP may still be challenged, invalidated or subject to other infringement actions. If a significant portion of our IP is invalidated or ineffective, our business could be materially adversely affected.

A breach of our operational or security systems could negatively affect our business and results of operations.

We rely on various information technology networks and systems to process, transmit and store electronic information, including proprietary and confidential data, and to carry out and support a variety of business activities, including manufacturing, research and development, supply chain management, sales and accounting. We have experienced several attempted cyber-attacks of our network. None of the attempted attacks have caused a disruption to our operations or had a material adverse effect on our business or financial results. As a result of the attempts, we have taken further preventive security measures to protect our systems. Despite the preventive security measures we have implemented, we may continue to be vulnerable to attempts by third parties to gain

unauthorized access to our networks or sabotage our systems. These attempts, which might be related to criminal hackers, industrial espionage or state-sponsored intrusions, include trying to covertly introduce malware to our computers, networks and systems and impersonating authorized users. Additionally, evolving geopolitical tensions or conflicts have created a heightened risk of cybersecurity attacks. In addition, third party suppliers and service providers that we rely on to manage our networks and systems and who process and store our proprietary and confidential data, including the data of our customers and suppliers, may also be subject to similar attacks. Employees and contractors may also attempt to gain unauthorized access to our systems and steal proprietary and confidential data. Such attempts could result in the misappropriation, theft, misuse, disclosure or loss or destruction of the intellectual property, or the proprietary, confidential or personal information, of Teradyne or our employees, customers, suppliers or other third parties, as well as damage to or disruptions in our information technology networks and systems. These threats are constantly evolving and expanding, such as through the increased use of artificial intelligence in our products and expanding remote work opportunities for our employees, thereby increasing the difficulty of defending against them or implementing adequate preventative measures. Attempts to gain unauthorized access to our information technology networks and systems may be successful, and in some cases, we might be unaware of an incident or its magnitude and effects. A failure in or a breach of our operational or security systems or infrastructure, or those of our suppliers and other service providers, including as a result of cyber-attacks, could have a material adverse effect on our business or financial results, disrupt our business, result in the disclosure or misuse of proprietary or confidential information, damage our reputation, cause losses and increase our costs. We expect to continue to devote significant resources to the security of our information technology networks and systems. Furthermore, our efforts to comply with evolving laws and regulations related to cybersecurity may be costly and any failure to comply could result in investigations, proceedings, investor lawsuits and reputational damage.

A breach of the security of our products could negatively affect our business and results of operations.

We may be subject to security breaches of certain of our products caused by viruses, illegal break-ins or hacking, sabotage, or acts of vandalism by third parties or our employees or contractors. A breach of our product security systems could have a material adverse effect on our business or financial results, disrupt our business, result in the disclosure or misuse of proprietary or confidential information, damage our reputation, cause losses, and increase our costs. We expect to continue to devote significant resources to the security of our products.

We are exposed to risks related to the use of AI tools by us and others.

Our use of AI tools may subject us to significant competitive, legal, regulatory and other risks, and there can be no assurance that our use of AI tools will enhance our products, business operations or result in a benefit to us. Our competitors may be more successful in their use of AI tools, including by developing superior products or improving their operations with the assistance of AI. Additionally, there could be adverse impacts from flawed algorithms, including related to incorporation of third-party copyrighted materials into large language models; data quality and bias, as well as challenges implementing and maintaining AI tools, such as the complications arising from integrating such tools with existing systems and practices, and from reliance on third-party AI vendors. Our use of AI tools, or our customers uses of our products that incorporate AI, could also result in the loss of confidential information or intellectual property or an inability to claim or enforce intellectual property rights, as well as subject us to risks related to intellectual property infringement or misappropriation, data privacy, cybersecurity, and the unauthorized use of our data. The jurisdictions in which we conduct business have and may adopt laws and regulations related to AI, which could cause us to incur greater compliance costs, limit our use of AI tools, or subject us to legal liabilities.

Risks Related to Legal and Regulatory Compliance

The implementation of tariffs on our products may have a material impact on our business.

Our business operations and supply chain are global and may be disrupted by the implementation of tariffs. In recent years, the United States has imposed significant tariffs on goods from some of our trading partners, and more significant tariffs continue to be threatened in light of rapidly evolving geopolitical tensions.

We cannot predict what further actions may ultimately be taken with respect to tariffs or what products or entities may be subject to such actions, or what reciprocation may be taken by other countries in response to U.S. actions. If we cannot find ways to mitigate the potential impacts from these tariffs successfully or in a timely manner, these additional tariffs and policies could have a significant impact on our business and operating results. The actual impact on any new tariffs is subject to a number of factors including the effective date, duration, amount, scope and nature of the tariffs. To date, recent tariff changes have not had a material adverse effect on our business, financial condition or results of operations, however, in the future, the implementation of additional tariffs by the United States or other countries could have a material adverse effect on our business, financial condition or results of operations.

In addition to the actions taken by the United States, China has implemented retaliatory tariffs on products made in the United States and imported into China. The retaliatory tariffs or other trade restrictions implemented by China and possible future retaliatory actions by China or other nations may in the future disrupt our business operations, sales and supply chain and, therefore, have a material adverse effect on our business, financial condition or results of operations.

Trade regulations and restrictions impact our ability to manufacture certain products and to sell products to and support certain customers, which may materially adversely affect our sales and results of operations.

We are subject to U.S. laws and regulations that limit and restrict the export of some of our products and services and may restrict our transactions with certain customers, business partners, suppliers and other persons. In certain circumstances, export control and economic sanctions regulations prohibit the export of certain products, services and technologies, and in other circumstances are required to obtain an export license. We must also comply with export restrictions and laws imposed by other countries affecting trade and investments. Our export compliance program may not be sufficient to prevent all inadvertent compliance violations and there are risks that the compliance controls could be circumvented, exposing us to legal liabilities. As further described below, we cannot quantify the impact that the export controls and economic sanctions has had on our sales, however, compliance with these laws has limited our ability to compete in certain regions, and could continue to limit them in the future. Changes in, and responses to, U.S. trade policy could reduce the competitiveness of our products and cause our sales to drop, which could have a material adverse effect on our business, financial condition or results of operations.

The U.S. government from time to time has issued export restrictions that prohibit U.S. companies from exporting U.S. manufactured products, foreign manufactured products with more than 25% controlled U.S. content, foreign made product which was produced using U.S. technology, as well as U.S. origin technology. For example, the U.S. Department of Commerce has restricted the access of U.S. origin technologies to certain Chinese semiconductor companies by adding those companies to the Entity List and the Foreign Direct Product Rule (“FDP”) under U.S. Export Administration Regulations (“EAR”). The addition of certain of these companies to the Entity List has had and will continue to have an adverse impact on our business with these customers. We cannot guarantee that we will be able to file for licenses with the U.S. Department of Commerce or otherwise take actions in the future to minimize the impact of the restrictions on our business.

The U.S. Department of Commerce issued and continues to update a list of companies in China and other countries that it considered to be military end users. Compliance with the military end user rule has impacted our ability to sell products to certain customers in China. We cannot be certain that the actions we take will address all of the risks associated with the export controls that may impact our business and our compliance controls could be circumvented, exposing us to legal liabilities.

We anticipate the U.S. Department of Commerce will continue to release new export control regulations. These regulations may continue to have an adverse impact on certain actual or potential customers and on the global semiconductor industry. To the extent the regulations impact actual and potential customers or disrupt the global semiconductor industry, our business and revenues will be adversely impacted.

In response to the regulations issued by the U.S. Department of Commerce, the Chinese government has passed new laws, including blocking legislation, which may impact our business activities in China. The Company is assessing the potential impact of these new Chinese laws and monitoring relevant laws and regulations issued by the Chinese government. The impact of these new Chinese laws on our business activities in China remains uncertain at this time.

We may be subject to product recalls and warranty and product liability claims.

We invest significant resources in the design, manufacturing and testing of our products. However, from time to time, we discover design or manufacturing defects in our products after they have been shipped and, as a result, we have incurred development and remediation costs and settled warranty and product liability claims. In addition, when our products contain defects or have reliability, quality or safety issues, in the past we have conducted a product recall which has resulted in significant repair or replacement costs and substantial delays in product shipments, which in the future could damage our reputation and could make it more difficult to sell our products. We may continue to have warranty and product liability claims or product recalls in the future. Any of these results could have a material adverse effect on our business, results of operations or financial condition.

We may incur significant costs of complying with present and future environmental regulations and may incur significant liabilities if we fail to comply with such environmental regulations.

We are subject to both domestic and international environmental regulations and statutory strict liability relating to the use, storage, discharge, site cleanup and disposal of hazardous chemicals used in our manufacturing processes. In addition, future regulations in response to global climate change may affect us, our suppliers, and our customers. Such regulations could cause us to

incur additional direct costs for compliance, as well as increased indirect costs resulting from our customers and/or suppliers. Future climate change regulations could result in decreased demand for our products. If we fail to comply with present and future regulations, or are required to perform site remediation, we could be subject to future liabilities or cost, including penalties or the suspension of production. Present and future regulations may also:

Pursuant to present U.S. federal regulations and agreements, we are conducting groundwater and subsurface assessment and monitoring and are implementing remediation and corrective action plans for facilities located in Massachusetts and New Hampshire which are no longer conducting manufacturing operations. As of December 31, 2025, we have not incurred material costs as a result of the monitoring and remediation steps taken at the Massachusetts and New Hampshire sites. We may in the future be subject to additional assessment and monitoring or other corrective action as a result of environmental liabilities and may incur significant future costs or disruptions to our operations resulting in a negative impact on our business or financial condition.

The directive on the Restriction of the Use of Certain Hazardous Substances in Electrical and Electronic Equipment (the “RoHS Directive”) and the directive on Waste Electrical and Electronic Equipment (the “WEEE Directive”) altered the form and manner in which electronic equipment is imported, sold and handled in the European Union. Other jurisdictions, such as China, have followed the European Union’s lead in enacting legislation with respect to hazardous substances and waste removal. Ensuring compliance with the RoHS Directive, the WEEE Directive and similar legislation in other jurisdictions, and integrating compliance activities with our suppliers and customers could result in additional costs and disruption to operations and logistics and thus, could have a negative impact on our business, operations or financial condition.

We currently are, and in the future may be, subject to litigation or regulatory proceedings that could have an adverse effect on our business.

From time to time, we may be subject to litigation or other administrative, regulatory or governmental proceedings, including tax audits and resulting claims that could require significant management time and resources and cause us to incur expenses and, in the event of an adverse decision, pay damages or incur costs in an amount that could have a material adverse effect on our financial position or results of operations. For information regarding litigation proceedings in which we are currently engaged, please refer to the discussion under Note O: “Commitments and Contingencies” in the Notes to Consolidated Financial Statements.

We may face risks associated with shareholder activism.

We may become subject to campaigns by shareholders advocating corporate actions such as financial restructuring, increased borrowing, special dividends, stock repurchases or divestitures, and changes in management. Such activities could interfere with our ability to execute our business plans, be costly and time-consuming, disrupt our operations, divert the attention of management, or result in our initiating borrowing or increasing our share repurchase plan or dividend, any of which could have an adverse effect on our business or stock price.

Item 1B: Unresolved Staff Comments

None.