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Equity Method Investment
 6 Months Ended
Jun. 30, 2024
Equity Method Investments and Joint Ventures [Abstract]  
Equity Method Investment

F. EQUITY METHOD INVESTMENT

On May 27, 2024, Teradyne paid $524.1 million to purchase a combination of previously issued and outstanding shares and shares newly issued by Technoprobe, S.p.A. ("Technoprobe"). The shares purchased represent 10% of the issued and outstanding shares of Technoprobe. Teradyne was also granted a board seat as part of the purchase. Teradyne accounts for this investment using the equity method as a result of being able to exercise significant influence over the operating and financial decisions of Technoprobe. As of June 30, 2024, $524.1 million was recorded as 'Equity method investment', in the consolidated balance sheets.

Based on the quoted closing price as of June 30, 2024, the fair value of the publicly traded investment in Technoprobe was $643.3 million, and there was no other-than-temporary impairment identified.

Teradyne made an accounting policy election to report its share of Technoprobe's results on a 3-month lag, which will be applied consistently from period to period. Teradyne will record its share of Technoprobe's net income or loss and other comprehensive income, and the amortization of equity method basis difference, beginning in the third quarter of 2024.