John R. Murphy - 29 Sep 2023 Form 4 Insider Report for Summit Materials, Inc.

Role: Director
Signature: /s/ Christopher B. Gaskill, as Attorney-in-Fact
Issuer symbol: N/A
Transactions as of: 29 Sep 2023
Net transactions value: $0
Form type: 4
Filing time: 02 Oct 2023, 20:04:11 UTC
Previous filing: 23 May 2023
Next filing: 06 Oct 2023
SEC: View on sec.gov

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	SUM	Class A Common Stock	Conversion of derivative security		+4,274	+25%		21,499	29 Sep 2023	Direct	F1

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
transaction	SUM	LP Units of Summit Materials Holdings L.P.	Conversion of derivative security		-4,274	-100%		0	29 Sep 2023	Class A Common Stock	4,274		Direct	F1

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

Explanation of Responses:

Id	Content
F1	Pursuant to the terms of an exchange agreement, dated as of March 11, 2015, the limited partnership units of Summit Materials Holdings L.P. ("LP Units") reported herein are exchangeable from and after the first anniversary of the closing of the Issuer's initial public offering (subject to the terms of the exchange agreement and vesting requirements, including certain vesting events more fully described in the Issuer's Registration Statement on Form S-1 (File No. 333-201058)) for shares of the Issuer's Class A common stock on a one-for-one basis.

Content

Pursuant to the terms of an exchange agreement, dated as of March 11, 2015, the limited partnership units of Summit Materials Holdings L.P. ("LP Units") reported herein are exchangeable from and after the first anniversary of the closing of the Issuer's initial public offering (subject to the terms of the exchange agreement and vesting requirements, including certain vesting events more fully described in the Issuer's Registration Statement on Form S-1 (File No. 333-201058)) for shares of the Issuer's Class A common stock on a one-for-one basis.