UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, D.C. 20549
SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, D.C. 20549
FORM SD
SPECIALIZED DISCLOSURE REPORT
Ultra Clean Holdings, Inc.
(Exact name of Registrant as Specified in Its Charter)
| Delaware | 000-50646 | 61-1430858 | ||||||||||||
| (State or Other Jurisdiction of Incorporation) | (Commission File Number) | (IRS Employer Identification No.) | ||||||||||||
| 26462 Corporate Avenue | ||||||||||||||
Hayward, California | 94545 | |||||||||||||
| (Address of Principal Executive Offices) | (Zip Code) | |||||||||||||
| Paul Y. Cho (510) 576-4400 | ||||||||||||||
| (Name and telephone number, including area code, of the person to contact in connection with this report.) | ||||||||||||||
Check the appropriate box to indicate the rule pursuant to which this form is being filed:
x Rule 13p-1 under the Securities Exchange Act (17 CFR 240.13p-1) for the reporting period from January 1, 2025 to December 31, 2025.
☐ Rule 13q-1 under the Securities Exchange Act (17 CFR 240.13q-1) for the fiscal year ended.
Section 1 – Conflict Minerals Disclosure
Item 1.01 Conflict Minerals Disclosure and Report
Conflict Minerals Disclosure
The registrant’s Conflict Minerals Report for the reporting period from January 1, 2025 to December 31, 2025 is provided as Exhibit 1.01 hereto and is publicly available at: www.uct.com under “Corporate Governance.” The content on any web site referred to in this Form SD is not incorporated by reference into this Form SD unless expressly noted.
Item 1.02 Exhibit
A copy of the Company’s Conflict Minerals Report as required by Item 1.01 is filed as Exhibit 1.01 hereto.
Section 3 – Exhibits
Item 3.01 Exhibits
The following exhibit is filed as part of this report.
| Exhibit | Exhibit Description | |||||||
| 1.01 | ||||||||
SIGNATURES
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. | |||||||||||
| Date: | May 26, 2026 | By: | /s/ Paul Y. Cho | ||||||||
| Name: Paul Y. Cho Title: General Counsel and Corporate Secretary | |||||||||||