Sec Form 4 Filing - Blackstone Holdings II L.P. @ Summit Materials, Inc.

Insider filing report for Changes in Beneficial Ownership

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FORM 4

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP
Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person

Blackstone Holdings II L.P.

2. Issuer Name and Ticker or Trading Symbol
Summit Materials, Inc. [ SUM]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

_____ Director	X __ 10% Owner
_____ Officer (give title below)	_____ Other (specify below)

(Last)

(First)

(Middle)

C/O THE BLACKSTONE GROUP L.P., 345 PARK AVENUE

3. Date of Earliest Transaction (MM/DD/YY)
04/19/2016

(Street)

NEW YORK, NY10154

4. If Amendment, Date Original Filed (MM/DD/YY)

6. Individual or Joint/Group Filing (Check Applicable Line)
_____ Form filed by One Reporting Person
__ X __ Form filed by More than One Reporting Person

(City)

(State)

(Zip)

**Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned**
1.Title of Security (Instr. 3)	2. Transaction Date (MM/DD/YY)	2A. Deemed Execution Date, if any (MM/DD/YY)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
1.Title of Security (Instr. 3)	2. Transaction Date (MM/DD/YY)	2A. Deemed Execution Date, if any (MM/DD/YY)	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
Class A Common Stock	04/19/2016		C		7,523,988	A		7,523,988	I	See Footnotes ^{( 3 )} ^{( 8 )} ^{( 9 )} ^{( 10 )} ^{( 11 )} ^{( 12 )}
Class A Common Stock	04/19/2016		S		7,523,988	D	$ 20 ^{( 2 )}	0	I	See Footnotes ^{( 3 )} ^{( 8 )} ^{( 9 )} ^{( 10 )} ^{( 11 )} ^{( 12 )}
Class A Common Stock	04/19/2016		C		1,586,120	A		1,586,120	I	See Footnotes ^{( 4 )} ^{( 8 )} ^{( 9 )} ^{( 10 )} ^{( 11 )} ^{( 12 )}
Class A Common Stock	04/19/2016		S		1,586,120	D	$ 20 ^{( 2 )}	0	I	See Footnotes ^{( 4 )} ^{( 8 )} ^{( 9 )} ^{( 10 )} ^{( 11 )} ^{( 12 )}
Class A Common Stock	04/19/2016		C		143,097	A		143,097	I	See Footnotes ^{( 5 )} ^{( 8 )} ^{( 9 )} ^{( 10 )} ^{( 11 )} ^{( 12 )}
Class A Common Stock	04/19/2016		S		143,097	D	$ 20 ^{( 2 )}	0	I	See Footnotes ^{( 5 )} ^{( 8 )} ^{( 9 )} ^{( 10 )} ^{( 11 )} ^{( 12 )}
Class A Common Stock	04/19/2016		C		12,126	A		12,126	I	See Footnotes ^{( 6 )} ^{( 8 )} ^{( 9 )} ^{( 10 )} ^{( 11 )} ^{( 12 )}
Class A Common Stock	04/19/2016		S		12,126	D	$ 20 ^{( 2 )}	0	I	See Footnotes ^{( 6 )} ^{( 8 )} ^{( 9 )} ^{( 10 )} ^{( 11 )} ^{( 12 )}
Class A Common Stock	04/19/2016		C		7,047	A		7,047	I	See Footnotes ^{( 7 )} ^{( 8 )} ^{( 9 )} ^{( 10 )} ^{( 11 )} ^{( 12 )}
Class A Common Stock	04/19/2016		S		7,047	D	$ 20 ^{( 2 )}	0	I	See Footnotes ^{( 7 )} ^{( 8 )} ^{( 9 )} ^{( 10 )} ^{( 11 )} ^{( 12 )}

**Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned**
( *e.g.* , puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (MM/DD/YY)	3A. Deemed Execution Date, if any (MM/DD/YY)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5)		6. Date Exercisable and Expiration Date (MM/DD/YY)		7. Title and Amount of Underlying Securities (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (MM/DD/YY)	3A. Deemed Execution Date, if any (MM/DD/YY)	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)			11. Nature of Indirect Beneficial Ownership (Instr. 4)
LP Units of Summit Materials Holdings L.P.	^{( 1 )}	04/19/2016		C			7,523,988	^{( 1 )}	^{( 1 )}	Class A Common Stock	7,523,988	^{( 1 )}	23,257,069	I	See Footnotes ^{( 3 )} ^{( 8 )} ^{( 9 )} ^{( 10 )} ^{( 11 )} ^{( 12 )}
LP Units of Summit Materials Holdings L.P.	^{( 1 )}	04/19/2016		C			1,586,120	^{( 1 )}	^{( 1 )}	Class A Common Stock	1,586,120	^{( 1 )}	4,902,781	I	See Footnotes ^{( 4 )} ^{( 8 )} ^{( 9 )} ^{( 10 )} ^{( 11 )} ^{( 12 )}
LP Units of Summit Materials Holdings L.P.	^{( 1 )}	04/19/2016		C			143,097	^{( 1 )}	^{( 1 )}	Class A Common Stock	143,097	^{( 1 )}	442,318	I	See Footnotes ^{( 5 )} ^{( 8 )} ^{( 9 )} ^{( 10 )} ^{( 11 )} ^{( 12 )}
LP Units of Summit Materials Holdings L.P.	^{( 1 )}	04/19/2016		C			12,126	^{( 1 )}	^{( 1 )}	Class A Common Stock	12,126	^{( 1 )}	37,479	I	See Footnotes ^{( 6 )} ^{( 8 )} ^{( 9 )} ^{( 10 )} ^{( 11 )} ^{( 12 )}
LP Units of Summit Materials Holdings L.P.	^{( 1 )}	04/19/2016		C			7,047	^{( 1 )}	^{( 1 )}	Class A Common Stock	7,047	^{( 1 )}	21,779	I	See Footnotes ^{( 7 )} ^{( 8 )} ^{( 9 )} ^{( 10 )} ^{( 11 )} ^{( 12 )}

**Reporting Owners**
Reporting Owner Name / Address	Relationships
Reporting Owner Name / Address	Director	10% Owner	Officer	Other
Blackstone Holdings II L.P. C/O THE BLACKSTONE GROUP L.P. 345 PARK AVENUE NEW YORK, NY10154		X
Blackstone Holdings I/II GP Inc C/O THE BLACKSTONE GROUP L.P. 345 PARK AVENUE NEW YORK, NY10154		X
Blackstone Group L.P. 345 PARK AVENUE NEW YORK, NY10154		X
Blackstone Group Management L.L.C. C/O THE BLACKSTONE GROUP L.P. 345 PARK AVENUE NEW YORK, NY10154		X
SCHWARZMAN STEPHEN A C/O THE BLACKSTONE GROUP L.P. 345 PARK AVENUE NEW YORK, NY10154		X

**Signatures**
BLACKSTONE HOLDINGS II L.P., By: Blackstone Holdings I/II GP Inc., its general partner, By: /s/ John G. Finley, Name: John G. Finley, Title: Chief Legal Officer		04/21/2016
Signature of Reporting Person		Date
BLACKSTONE HOLDINGS I/II GP INC., By: /s/ John G. Finley, Name: John G. Finley, Title: Chief Legal Officer		04/21/2016
Signature of Reporting Person		Date
THE BLACKSTONE GROUP L.P., By: Blackstone Group Management L.L.C., its general partner, By: /s/ John G. Finley, Name: John G. Finley, Title: Chief Legal Officer		04/21/2016
Signature of Reporting Person		Date
BLACKSTONE GROUP MANAGEMENT L.L.C., By: /s/ John G. Finley, Name: John G. Finley, Title: Chief Legal Officer		04/21/2016
Signature of Reporting Person		Date
/s/ STEPHEN A. SCHWARZMAN		04/21/2016
Signature of Reporting Person		Date

Explanation of Responses:

( 1 )Pursuant to the terms of an exchange agreement, dated as of March 11, 2015, limited partnership units of Summit Materials Holdings L.P. ("LP Units") held by the Reporting Persons are exchangeable for shares of the issuer's Class A common stock ("Common Stock") on a one-for-one basis.
( 2 )This amount represents the $20.15 public offering price per share of Common Stock, less the underwriting discount of $0.15 per share of Common Stock.
( 3 )Reflects securities of the issuer held directly by Blackstone Capital Partners (Delaware) V-NQ L.P.
( 4 )Reflects securities of the issuer held directly by Blackstone Capital Partners (Delaware) NQ V-AC L.P.
( 5 )Reflects securities of the issuer held directly by Summit BCP Intermediate Holdings L.P. The general partner of Summit BCP Intermediate Holdings L.P. is Summit BCP Intermediate Holdings GP, Ltd. Summit BCP Intermediate Holdings GP, Ltd. is owned by Blackstone Capital Partners (Delaware) V-NQ L.P., Blackstone Capital Partners (Delaware) NQ V-AC L.P., Blackstone Family Investment Partnership (Delaware) V-NQ L.P. and Blackstone Participation Partnership (Delaware) V-NQ L.P.
( 6 )Reflects securities of the issuer held directly by Blackstone Family Investment Partnership (Delaware) V-NQ L.P.
( 7 )Reflects securities of the issuer held directly by Blackstone Participation Partnership (Delaware) V-NQ L.P. (collectively with Blackstone Capital Partners (Delaware) V-NQ L.P., Blackstone Capital Partners (Delaware) NQ V-AC L.P., Summit BCP Intermediate Holdings L.P. and Blackstone Family Investment Partnership (Delaware) V-NQ L.P., the "Blackstone Funds").
( 8 )The general partner of each of Blackstone Capital Partners (Delaware) V-NQ L.P. and Blackstone Capital Partners (Delaware) NQ V-AC L.P. is Blackstone Management Associates (Cayman) V-NQ L.P. The general partners of each of Blackstone Management Associates (Cayman) V-NQ L.P., Blackstone Family Investment Partnership (Delaware) V-NQ L.P. and Blackstone Participation Partnership (Delaware) V-NQ L.P. are Blackstone LR Associates (Cayman) V-NQ Ltd. and BCP V-NQ GP L.L.C.
( 9 )Blackstone Holdings II L.P. is the sole member of BCP V-NQ GP L.L.C. and the controlling shareholder of Blackstone LR Associates (Cayman) V-NQ Ltd. The general partner of Blackstone Holdings II L.P. is Blackstone Holdings I/II GP Inc. The sole shareholder of Blackstone Holdings I/II GP Inc. is The Blackstone Group L.P. The general partner of The Blackstone Group L.P. is Blackstone Group Management L.L.C. Blackstone Group Management L.L.C. is wholly owned by Blackstone's senior managing directors and controlled by its founder, Stephen A. Schwarzman.
( 10 )Due to the limitations of the electronic filing system Blackstone Capital Partners (Delaware) V-NQ L.P., Blackstone Capital Partners (Delaware) NQ V-AC L.P., Summit BCP Intermediate Holdings L.P., Summit BCP Intermediate Holdings GP, Ltd., Blackstone Family Investment Partnership (Delaware) V-NQ L.P., Blackstone Participation Partnership (Delaware) V-NQ L.P., Blackstone Management Associates (Cayman) V-NQ L.P., BCP V-NQ GP L.L.C. and Blackstone LR Associates (Cayman) V-NQ Ltd. are filing a separate Form 4.
( 11 )Information with respect to each of the Reporting Persons is given solely by such Reporting Person, and no Reporting Person has responsibility for the accuracy or completeness of information supplied by another Reporting Person.
( 12 )Each of the Reporting Persons (other than the Blackstone Funds to the extent they directly hold securities reported herein), disclaims beneficial ownership of the securities held by the Blackstone Funds, except to the extent of such Reporting Person's pecuniary interest therein, if any, and, pursuant to Rule 16a-1(a)(4) under the Securities Exchange Act of 1934, each of the Reporting Persons (other than the Blackstone Funds to the extent they directly hold securities reported herein) states that the inclusion of these securities in this report shall not be deemed an admission of beneficial ownership of all of the reported securities for purposes of Section 16 or for any other purpose.

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).

** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).

Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

Sec Form 4 Filing - Blackstone Holdings II L.P. @ Summit Materials, Inc. - 2016-04-19