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Filing Details

Accession Number:: 0001104659-17-012717
Form Type:: 4
Zero Holdings:: No
Publication Time:: 2017-02-28 20:17:57
Reporting Period:: 2017-02-24

Filing Date:: 2017-02-28
Accepted Time:: 2017-02-28 20:17:57
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 And 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	Explanation
Class A Common Stock	Acquisiton	2017-02-24	14,382	$0.00	24,653	No	4	M	Direct
Class A Common Stock	Disposition	2017-02-24	4,043	$23.75	20,610	No	4	F	Direct
Class A Common Stock	Disposition	2017-02-27	5,000	$24.28	15,360	No	4	S	Indirect	See Footnote
Class A Common Stock	Disposition	2017-02-28	5,000	$23.89	10,360	No	4	S	Indirect	See Footnote

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	M	Direct
No	4	F	Direct
No	4	S	Indirect	See Footnote
No	4	S	Indirect	See Footnote

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	2017-02-24	14,382	$0.00	14,382	$0.00

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
28,763			No	4	M	Direct

Footnotes

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.
Total holdings include shares of Class A Common Stock received pursuant to a stock dividend paid on December 28, 2016.
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 $23.75 to $24.55, 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 securities held by a trust for the benefit of Mr. Hill's family, for which Mr. Hill's spouse serves as trustee.
The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $23.75 to $24.23, 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.
Each restricted stock unit represents a contingent right to receive one share of Class A Common Stock. The restricted stock units settle in either Class A Common Stock or cash (or a combination thereof) at the discretion of the Issuer's compensation committee.
On February 24, 2016, the Reporting Person was granted 43,145 restricted stock units that vest in three equal annual installments beginning on February 24, 2017.