Exhibit 99.1

Teradyne Reports First Quarter 2023 Results

NORTH READING, Mass. – April 26, 2023 – Teradyne, Inc. (NASDAQ: TER) reported revenue of $618 million for the first quarter of 2023 of which $415 million was in Semiconductor Test, $75 million in System Test, $39 million in Wireless Test and $89 million in Robotics. GAAP net income for the first quarter was $83.5 million or $0.50 per diluted share. On a non-GAAP basis, Teradyne’s net income in the first quarter was $91.3 million, or $0.55 per diluted share, which excluded stock compensation modification expense, acquired intangible asset amortization, restructuring and other charges, discrete income tax items and included the related tax impact on non-GAAP adjustments.

“A faster recovery from supply chain constraints in our test businesses and Robotics shipments within the range of our expectations contributed to first quarter financial results that were above the mid-point of guidance,” said Teradyne CEO Greg Smith. “Looking ahead, we expect stronger demand in automotive and industrial semiconductor test to help offset ongoing weakness in smartphone related end markets. In Robotics, slowing global industrial growth is contributing to softening near-term demand.”

Guidance for the second quarter of 2023 is revenue of $625 million to $685 million, with GAAP net income of $0.53 to $0.72 per diluted share and non-GAAP net income of $0.55 to $0.74 per diluted share. Non-GAAP guidance excludes acquired intangible asset amortization and includes the related tax impact on non-GAAP adjustments.

Webcast

A conference call to discuss the first quarter results, along with management’s business outlook, will follow at 8:30 a.m. ET, Thursday, April 27. Interested investors should access the webcast at www.teradyne.com and click on “Investors” at least five minutes before the call begins. Presentation materials will be available starting at 8:30 a.m. ET. A replay will be available on the Teradyne website at www.teradyne.com/investors.

Non-GAAP Results

In addition to disclosing results that are determined in accordance with GAAP, Teradyne also discloses non-GAAP results of operations that exclude certain income items and

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charges. These results are provided as a complement to results provided in accordance with GAAP. Non-GAAP income from operations and non-GAAP net income exclude acquired intangible assets amortization, restructuring and other, pension actuarial gains and losses, stock compensation modification expense, discrete income tax adjustments, and includes the related tax impact on non-GAAP adjustments. GAAP requires that these items be included in determining income from operations and net income. Non-GAAP income from operations, non-GAAP net income, non-GAAP income from operations as a percentage of revenue, non-GAAP net income as a percentage of revenue, and non-GAAP net income per share are non-GAAP performance measures presented to provide meaningful supplemental information regarding Teradyne’s baseline performance before gains, losses or other charges that may not be indicative of Teradyne’s current core business or future outlook. These non-GAAP performance measures are used to make operational decisions, to determine employee compensation, to forecast future operational results, and for comparison with Teradyne’s business plan, historical operating results and the operating results of Teradyne’s competitors. Non-GAAP diluted shares include the impact of Teradyne’s call option on its shares. Management believes each of these non-GAAP performance measures provides useful supplemental information for investors, allowing greater transparency to the information used by management in its operational decision making and in the review of Teradyne’s financial and operational performance, as well as facilitating meaningful comparisons of Teradyne’s results in the current period compared with those in prior and future periods. A reconciliation of each available GAAP to non-GAAP financial measure discussed in this press release is contained in the attached exhibits and on the Teradyne website at www.teradyne.com by clicking on “Investor Relations” and then selecting “Financials” and the “GAAP to Non-GAAP Reconciliation” link. The non-GAAP performance measures discussed in this press release may not be comparable to similarly titled measures used by other companies. The presentation of non-GAAP measures is not meant to be considered in isolation, as a substitute for, or superior to, financial measures or information provided in accordance with GAAP.

About Teradyne

Teradyne (NASDAQ:TER) test technology helps bring high-quality innovations such as smart devices, life-saving medical equipment and data storage systems to market, faster. Its advanced test solutions for semiconductors, electronic systems, wireless devices and more ensure that products perform as they were designed. Its robotics offerings include collaborative and mobile robots that help manufacturers of all sizes increase productivity, improve safety, and lower costs. In 2022, Teradyne had revenue of $3.2 billion and today employs over 6,600 people worldwide. For more information, visit teradyne.com. Teradyne^® is a registered trademark of Teradyne, Inc., in the U.S. and other countries.

Safe Harbor Statement

This release contains forward-looking statements regarding Teradyne’s future business prospects, results of operations, market conditions, earnings per share, the impact of supply chain conditions on the business, customer sales expectations, the payment of a quarterly dividend, the repurchase of Teradyne common stock pursuant to a share repurchase program, the continued impact of the global COVID-19 pandemic, and the

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impact of U.S. and Chinese export and tariff laws, including new regulations published by the U.S. Department of Commerce on October 7, 2022. Such statements are based on the current assumptions and expectations of Teradyne’s management and are neither promises nor guarantees of future performance, events, customer sales, supply chain conditions or improvements, earnings per share, use of cash, payment of dividends, repurchases of common stock, payment of the senior convertible notes, the impact of the COVID-19 pandemic, the impact of any tariffs or export controls imposed by the U.S. or China, compliance with trade protection measures or export restrictions, the impact of U.S. Department of Commerce or other government agency regulations relating to Huawei, HiSilicon and other customers or potential customers, the impact of U.S. Department of Commerce export control regulations for certain U.S. products and technology sold to military end users or for military end-use in China, or the impact of regulations published by the U.S. Department of Commerce relating to the export of semiconductors and semiconductor manufacturing equipment destined to certain end users and for certain end uses in China. There can be no assurance that management’s estimates of Teradyne’s future results or other forward-looking statements will be achieved. Specifically, Teradyne’s 2026 earnings model is aspirational and includes many assumptions. There can be no assurance that these assumptions will be accurate or that model results will be achieved. As set forth below, there are many factors that could cause our 2026 earnings model and actual results to differ materially from those presently expected. Additionally, the current dividend and share repurchase programs may be modified, suspended or discontinued at any time.

On October 7, 2022, the U.S. Department of Commerce published new regulations restricting the export to China of advanced semiconductors, supercomputer technology, equipment for the manufacturing of advanced semiconductors and components and technology for the manufacturing in China of certain semiconductor manufacturing equipment. The new restrictions are lengthy and complex. Teradyne continues to assess the impact of these regulations on its business. At this time, the Company has determined that restrictions on the sale of semiconductor testers in China to test certain advanced semiconductors will impact Teradyne’s sales to certain companies in China. Several multinational companies manufacturing these advanced semiconductors in China have obtained one-year licenses allowing suppliers such as Teradyne to continue to provide testers to the facilities operated by these companies. We expect that other companies manufacturing advanced semiconductors in China will not receive licenses, thereby restricting Teradyne’s ability to provide testers to the facilities operated by these companies that do not receive a license. The Company is filing license requests to sell to and support certain customers in China for certain end uses that, if granted, may reduce the impact of these restrictions on the Company’s business. At this time, Teradyne does not know the impact these end user and end use restrictions will have on its business in China or on future revenues. In addition to the specific restrictions impacting Teradyne’s business, the regulations may 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, Teradyne’s business and revenues will be adversely impacted.

The Company also has determined that the restrictions on the export of certain US origin components and technology for use in the development and production in China of

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certain semiconductor manufacturing equipment impact its manufacturing and development operations in China. Teradyne has received a temporary authorization from the Department of Commerce allowing the Company to continue its manufacturing and development operations in China until the Department of Commerce issues a license to replace this temporary authorization. The Company has applied for a license but cannot assess the likelihood or timing of receiving this license. In addition to requesting a license, the Company is implementing procedures for minimizing the impact of these new regulations, but there is no assurance that these procedures will succeed.

Important factors that could cause actual results, the 2026 earnings model, earnings per share, use of cash, dividend payments, repurchases of common stock, or payment of the senior convertible notes to differ materially from those presently expected include: conditions affecting the markets in which Teradyne operates; decreased or delayed product demand from one or more significant customers; development, delivery and acceptance of new products; the ability to grow the Robotics business; increased research and development spending; deterioration of Teradyne’s financial condition; the continued impact of the COVID-19 pandemic and related government responses on the market and demand for Teradyne’s products, on its contract manufacturers and supply chain, and on its workforce; the impact of a supply shortage on our supply chain and contract manufacturers; the consummation and success of any mergers or acquisitions; unexpected cash needs; insufficient cash flow to make required payments and pay the principal amount on the senior convertible notes; the business judgment of the board of directors that a declaration of a dividend or the repurchase of common stock is not in the Company’s best interests; additional U.S. or global tax regulations or guidance; the impact of any tariffs or export controls imposed by the U.S. or China; compliance with trade protection measures or export restrictions; the impact of U.S. Department of Commerce or other government agency regulations relating to Huawei, HiSilicon and other customers or potential customers; the impact of U.S. Department Commerce export control regulations for certain U.S. products and technology sold to military end users or for military end-use in China; the impact of regulations published by the U.S. Department of Commerce relating to semiconductors and semiconductor manufacturing equipment destined for certain end uses in China; and other events, factors and risks disclosed in filings with the SEC, including, but not limited to, the “Risk Factors” section of Teradyne’s Annual Report on Form 10-K for the fiscal year ended December 31, 2022. The forward-looking statements provided by Teradyne in this press release represent management’s views as of the date of this release. Teradyne anticipates that subsequent events and developments may cause management’s views to change. However, while Teradyne may elect to update these forward-looking statements at some point in the future, Teradyne specifically disclaims any obligation to do so. These forward-looking statements should not be relied upon as representing Teradyne’s views as of any date subsequent to the date of this release.

TERADYNE, INC. REPORT FOR FIRST FISCAL QUARTER OF 2023

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS

CONDENSED CONSOLIDATED BALANCE SHEETS (In thousands)

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (In thousands)

GAAP to Non-GAAP Earnings Reconciliation

(In millions, except per share amounts)

GAAP to Non-GAAP Reconciliation of Second Quarter 2023 guidance:

For press releases and other information of interest to investors, please visit Teradyne’s homepage at http://www.teradyne.com.

Contact: Teradyne, Inc.

Andy Blanchard 978-370-2425

Vice President of Corporate Relations