SEC Form 4 · accession 0001104659-17-015249

Summit Materials, Inc. · SUM

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

Reporting owner

Thomas W. Hill

Officer — President and CEO · Director

Period of report

Mar 6, 2017

Accepted (ET)

Mar 8, 2017 · 6:00 pm EST

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^F1,F2	Mar 6, 2017	C	50,000	—	A	60,360	I	See Footnote
Class A Common Stock	holding	—	—		—	20,610	D

Table II — derivative securities

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.^F1,F2	—	Mar 6, 2017	C	50,000	D	—	—	Class A Common Stock	50,000	126,969	I
LP Units of Summit Materials Holdings L.P.^F1	—	holding	—	—	—	—	—	Class A Common Stock	742,456	742,456	D

Explanation of responses

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)) for shares of the issuer's Class A common stock on a one-for-one basis.
F2Reflects securities held by a trust for the benefit of Mr. Hill's family, for which Mr. Hill's spouse serves as trustee.

Remarks

The Reporting Person disclaims beneficial ownership of the securities reported herein as indirectly beneficially owned, except to the extent of his pecuniary interest therein.