Form SD Lumentum Holdings Inc.

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UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

Form SD

Specialized Disclosure Report

Lumentum Holdings Inc.

(Exact name of Registrant as specified in its charter)

Delaware

001-36861

47-3108385

(State or Other Jurisdiction

of Incorporation)

(Commission File Number)

(IRS Employer

Identification Number)

1001 Ridder Park Drive, San Jose, CA

95131

(Address of Principal Executive Offices)

(Zip Code)

Jae Kim, Sr. Vice President, General Counsel and Secretary

(408) 546-5483

(Name and telephone number, including area code, of the person to contact in connection with this report)

Not Applicable

(Former Name or Former Address, if Changed Since Last Report)

Check the appropriate box to indicate the rule pursuant to which this form is being filed, and provide the period to which the information in this form applies:




☒			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

Section 1 - Conflict Minerals Disclosure

Item 1.01 Conflict Minerals Disclosure and Report

Conflict Minerals Disclosure

Information required by this Item is incorporated by reference to the Conflict Minerals Report attached hereto as Exhibit 1.01.

A copy of this Form SD, including the Lumentum Holdings Inc. Conflict Minerals Report, is publicly available at www.lumentum.com/investors.

Item 1.02 Exhibit

The Conflict Minerals Report required by Item 1.01 is filed as Exhibit 1.01 to this Form SD.

Section 3 - Exhibits

Item 3.01 Exhibits

The following exhibit is filed as part of this Report.

Exhibit No.

Description

1.01

Conflict Minerals Report of Lumentum Holdings Inc. for the reporting period from January 1, 2025 to December 31, 2025

Signature

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 hereunto duly authorized.