sum-20221114

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

PURSUANT TO SECTION 13 OR 15 (d)

OF THE SECURITIES EXCHANGE ACT OF 1934

Date of report (Date of earliest event reported): November 14, 2022

Summit Materials, Inc.

(Exact name of registrant as specified in its charter)


Delaware	001-36873	47-1984212
(State or Other Jurisdiction	(Commission	(I.R.S. Employer
of Incorporation)	File Number)	Identification No.)

1801 California Street, Suite 3500

Denver, Colorado 80202

(Address of Principal Executive Offices) (Zip Code)

Registrant’s Telephone Number, Including Area Code: (303) 893-0012

1550 Wynkoop Street, 3rd Floor

Denver, Colorado 80202

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

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of each class

Trading Symbol(s)

Name of each exchange on which registered

Class A Common Stock (par value, $0.01 per share)

SUM

New York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 5.02 Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers;

Compensatory Arrangements of Certain Officers.

Deon MacMillan, Executive Vice President, Chief People Officer and Head of Corporate Communications of Summit Materials, Inc. (the “Company”), will be leaving the Company effective November 14, 2022. Ms. MacMillan’s departure constitutes a termination without “cause” under the Company’s Executive Severance Plan.

Item 7.01 Regulation FD Disclosure.

Effective upon Ms. MacMillan’s departure, Karli Anderson, Executive Vice President, Chief ESG Officer and Head of Investor Relations of the Company will assume leadership of the Company’s human resources and communications functions. As of the time of this report, the Company has not entered into any compensation arrangements with Ms. Anderson in connection with the announcement described above.

The information included under Item 7.01 of report is being furnished and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of such section. The information in Item 7.01 of this Current Report on Form 8-K shall not be incorporated by reference into any filing under the Securities Act of 1933, as amended, or the Exchange Act, unless specifically incorporated by reference into any such filing.

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 hereunto duly authorized.



	SUMMIT MATERIALS, INC.
DATED: November 14, 2022
	By:	/s/ Christopher B. Gaskill
	Name:	Christopher B. Gaskill
	Title:	EVP, Chief Legal Officer & Secretary