Specialized Disclosure Report (sd)

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

Form SD

SPECIALIZED DISCLOSURE REPORT

MillerKnoll, Inc.

(Exact Name of Registrant as Specified in Charter)

Michigan

001-15141

38-0837640

(State or Other Jurisdiction
of Incorporation)

(Commission File No.)

(I.R.S. Employer
Identification Number)

855 East Main Street, P.O. Box 302, Zeeland, MI

49464-0302

(Address of Principal Executive Offices)

(Zip Code)

Jacqueline H. Rice

Senior Vice President, General Counsel

Phone No. <(616) 654-3423>

(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, 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 to December 31, 2021.

Section 1 - Conflict Minerals Disclosure

Items 1.01 and 1.02 Conflict Minerals Disclosure and Report; Exhibits

Conflict Minerals Disclosure

MillerKnoll, Inc. is providing a Conflict Minerals Report for the calendar year ended December 31, 2021, filed as Exhibit 1.01 hereto, and it is publicly available electronically at https://www.millerknoll.com/investor-relations/financials-filings/sec-filings.

Section 2 - Exhibits
Exhibit 1.01 - Conflict Minerals Report as required by Items 1.01 and 1.02 of this Form.

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 duly authorized undersigned.

MILLERKNOLL, INC.