Item 8.01 Other Matters.

On January 9, 2023, Ultra Clean Holdings, Inc. (the "Company") issued a press release revising its estimated revenue outlook for the fourth quarter of 2022. A copy of the Company's press release is attached hereto as Exhibit 99.1.

The information furnished under Item 8.01 of this Current Report on Form 8-K, including the exhibit, shall not be deemed "filed" for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the "Exchange Act"), nor shall it be deemed incorporated by reference into the Company's filings with the SEC under the Securities Act of 1933, as amended, or the Exchange Act, except as shall be expressly set forth by specific reference in such a filing.

Item 9.01 Financial Statements and Exhibits.

(d) Exhibits



Exhibit
  No.     Exhibit Description

99.1        Press Release dated January 9, 2023
104       Cover Page Interactive Data File (embedded within the Inline XBRL document)

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