ONTO INNOVATION INC. 8-KCurrent Reports (8-K / ad hoc)

MD&A

Item 7.01. Regulation FD Disclosure On August 10, 2026, the Company issued a press release announcing the closing of the Rigaku Share Acquisition pursuant to the Purchase Agreement. A copy of the press release is attached to this Current Report on Form 8-K as Exhibit 99.1 and is incorporated into this report by reference. The information contained in Item 7.01 of this Current Report on Form 8-K (including Exhibit 99.1) shall be deemed furnished and not “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Exchange Act, regardless of any general incorporation by reference language in such filing, except as expressly set forth by specific reference in such filing.