Other Information
−Removed: The following exhibits are filed with this quarterly Report on Form 10-Q for the quarter ended March 27, 2026:
+Added: Insider Trading Arrangements
+Added: On May 30, 2026 , Clarence Granger , a member of the Company's Board of Directors , entered into a trading plan intended to satisfy the affirmative defense conditions of Rule 10b5-1(c) under the Exchange Act.
+Added: Granger's plan provides for the sale of up to 10,000 shares of the Company's common stock, subject to certain minimum price thresholds.
+Added: Granger's trading plan is scheduled to terminate on March 1, 2029 , subject to early termination.
+Added: The following exhibits are filed with this quarterly Report on Form 10-Q for the quarter ended June 26, 2026:
Description Form Exhibit Filing Date Filed
−Removed: 31.1 Certification of Interim Chief Executive Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002 .
+Added: 10.1 Tenth Amendment, dated as of April 23, 2026, by and among Ultra Clean Holdings, Inc., as parent borrower, the subsidiary guarantors party thereto, Barclays Bank PLC, as administrative agent, and the revolving lenders party thereto.
+Added: 8-K 10.1 April 24, 2026
+Added: 10.2† Ultra Clean Holdings, Inc.
+Added: Amended and Restated Stock Incentive Plan (amended and restated as of May 22, 2026)
+Added: S-8 99.1 July 10, 2026
+Added: 10.3† Employee Stock Purchase Plan (amended and restated as of May 22, 2026)
+Added: S-8 99.2 July 10, 2026
+Added: 31.1 Certification of Chief Executive Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002 .
31.2 Certification of Chief Financial Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
−Removed: 32.1 Certification of the Interim Chief Executive Officer and the Chief Financial Officer pursuant to 18 U.S.C.
+Added: 32.1* Certification of the Chief Executive Officer and the Chief Financial Officer pursuant to 18 U.S.C.
Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
−Removed: 10.1 Ninth Amendment, dated as of February 26, 2026, by and among Ultra Clean Holdings, Inc., the subsidiaries of Ultra Clean Holdings, Inc.
−Removed: party thereto, Barclays Bank PLC, as administrative agent and the lenders party thereto.
−Removed: 10.2 Form of Confirmation for Capped Call Transactions.
−Removed: 8-K 10.1 March 3, 2026
−Removed: 4.1 Indenture, dated as of March 3, 2026, between Ultra Clean Holdings, Inc.
−Removed: Bank Trust Company, National Association, as trustee.
−Removed: 8-K 4.1 March 3, 2026
−Removed: 4.2 Form of certificate representing the 0.00% Convertible Senior Notes due 2031 (included as Exhibit A to Exhibit 4.1).
−Removed: 8-K 4.2 March 3, 2026
101.INS Inline XBRL Instance Document – the instance document does not appear in the Interactive Data File because its XBRL tags are embedded within the Inline XBRL document.
5 unchanged sentences
104 Cover Page Interactive Data File (formatted as inline XBRL and contained in Exhibit 101)
+Added: † Denotes management contract or compensatory plan.
+Added: * The certifications furnished in Exhibit 32.1 hereto are deemed to accompany this Quarterly Report on Form 10-Q and will not be deemed “filed” or purposes of Section 18 of the Securities Exchange Act of 1934, as amended, and are not to be incorporated by reference into any of Ultra Clean Holdings, Inc.’s filings under the Securities Act of 1933, as amended, irrespective of any general incorporation language contained in such filing.
Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.
ULTRA CLEAN HOLDINGS, INC.
−Removed: April 29, 2026
+Added: August 4, 2026
/S/ JAMES XIAO
2 unchanged sentences
authorized signatory)
−Removed: April 29, 2026
+Added: August 4, 2026
/S/ SHERI SAVAGE
3 unchanged sentences
Compared sentence by sentence after normalising whitespace, quotation marks, case and digits, so re-formatting and restated figures do not read as changed language. Wording changes appear as one removal and one addition. The current filing and the prior one are authoritative.