SEC Form 4 · accession 0001209191-15-027973

Summit Materials, Inc. · SUM

Statement of changes in beneficial ownership, as filed. Original on EDGAR ↗

Reporting owner

Officer — See Remarks

Period of report

Mar 11, 2015

Accepted (ET)

Mar 19, 2015 · 5:39 pm EDT

Rule 10b5-1 plan

unknown — predates the checkbox

Issuer CIK

0001621563

Table I — non-derivative securities

Security	Date	Code	Shares	Price	A/D	Owned after	D/I	Nature of ownership
Class A Common Stock	Mar 17, 2015	P	2,000	$18.00	A	2,000	D

Security	Conv. / exercise price	Date	Code	Shares	A/D	Exercisable	Expires	Underlying	Underlying shares	Owned after	D/I
LP Units of Summit Materials Holdings L.P.^F2,F1	—	Mar 11, 2015	A	103,607	A	—	—	Class A Common Stock	103,607	103,607	D
Options (right to buy)^F2,F3	$18.00	Mar 11, 2015	A	33,471	A	—	Mar 11, 2025	Class A Common Stock	33,471	33,471	D
Options (right to buy)^F2,F4	$18.00	Mar 11, 2015	A	43,512	A	—	Mar 11, 2025	Class A Common Stock	43,512	43,512	D

F1Pursuant 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) (the "Registration Statement")) for shares of the issuer's Class A common stock on a one-for-one basis.
F2These securities were acquired in connection with the reclassification of the interests of Summit Material Holdings L.P. prior to the issuer's initial public offering (as more fully described in the Registration Statement).
F3The options vest in four equal annual installments beginning on March 11, 2016.
F4The options vest upon the achievement of certain vesting events more fully described in the Registration Statement.

Title: EVP, Chief Legal Officer & Secretary