John R. Murphy - Nov 8, 2021 Form 4 Insider Report for Summit Materials, Inc. (SUM)

Role: Director
Signature: /s/ Christopher B. Gaskill, as Attorney-in-Fact
Stock symbol: SUM
Transactions as of: Nov 8, 2021
Transactions value $: -$195,155
Form type: 4
Date filed: 11/9/2021, 08:43 PM
Previous filing: Jun 14, 2021
Next filing: Jan 20, 2022

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	SUM	Class A Common Stock	Sale	-$195K	-5.14K	-36.75%	$37.99	8.84K	Nov 8, 2021	Direct	F1

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $37.98 to $38.06, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth above. The Reporting Person remains within compliance of the Issuer's equity ownership guidelines.

Content

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $37.98 to $38.06, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth above. The Reporting Person remains within compliance of the Issuer's equity ownership guidelines.