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Filing Details

Accession Number:: 0001104659-18-014213
Form Type:: 4
Zero Holdings:: No
Publication Time:: 2018-03-01 21:06:10
Reporting Period:: 2018-02-27

Accepted Time:: 2018-03-01 21:06:10
SEC Url:: Form 4 Filing

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1621563	Summit Materials Inc.	SUM	()	4

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1440948	W. Thomas Hill	C/O Summit Materials, Inc. 1550 Wynkoop Street, 3Rd Floor Denver CO 80202	President & Ceo	Yes	Yes	No	No

Reported Non-Derivative Transactions

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Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership
Class A Common Stock	Disposition	2018-02-27	6,300	$32.04	152,846	No	4	S	Direct
Class A Common Stock	Disposition	2018-02-28	6,200	$32.02	146,646	No	4	S	Direct
Class A Common Stock	Acquisiton	2018-02-28	10,253	$0.00	156,899	No	4	M	Direct
Class A Common Stock	Disposition	2018-02-28	2,497	$31.63	154,402	No	4	F	Direct

Equity Swap Involved	Form Type	Code	Nature of Ownership
No	4	S	Direct
No	4	S	Direct
No	4	M	Direct
No	4	F	Direct

Reported Derivative Transactions

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Sec. Name	Sec. Type	Acquisiton - Disposition	Date	Amount	Price	Amount - 2	Price - 2
Class A Common Stock	Restricted Stock Units	Disposition	2018-02-28	10,253	$0.00	10,253	$0.00
Class A Common Stock	Restricted Stock Units	Acquisiton	2018-02-28	51,757	$0.00	51,757	$0.00

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
20,504			No	4	M	Direct
51,757			No	4	A	Direct

Reported Non-Derivative Holdings

Sec. Name	Remaning Holdings	Nature of Ownership	Explanation
Class A Common Stock	365	Indirect	See Footnote

Footnotes

The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan.
The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $31.77 to $32.51, 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 price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $31.62 to $32.33, 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.
Reflects restricted stock units that upon vesting converted into shares of Class A common stock of the Issuer ("Class A Common Stock") on a one-for-one basis.
Reflects securities held by a trust for the benefit of Mr. Hill's family, for which Mr. Hill's spouse serves as trustee.
Each restricted stock unit represents a contingent right to receive one share of Issuer Class A Common Stock. The restricted stock units will be settled in either Class A Common Stock or cash (or a combination thereof) at the discretion of the Issuer's compensation committee.
On February 28, 2017, the Reporting Person was granted 30,757 restricted stock units that vest in three equal annual installments beginning on February 28, 2018.
These restricted stock units vest in three equal annual installments beginning on February 28, 2019.