SEC FORM 3

SEC Form 3

FORM 3

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person^*

Blackstone Capital Partners (Cayman) V-NQ L.P.

(Last)

(First)

(Middle)

C/O THE BLACKSTONE GROUP L.P.

345 PARK AVENUE

(Street)

NEW YORK

(City)

(State)

(Zip)

2. Date of Event Requiring Statement (Month/Day/Year)
03/12/2015

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

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

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

5. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

	Form filed by One Reporting Person
X	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Beneficially Owned
1. Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)
Class B Common Stock	69,007,297	I	See Footnotes⁽¹⁾⁽⁹⁾⁽¹⁰⁾⁽¹¹⁾⁽¹²⁾⁽¹³⁾

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
1. Title of Derivative Security (Instr. 4)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
LP Units of Summit Materials Holdings L.P.	⁽²⁾	⁽²⁾	Common Stock	44,511,949	⁽²⁾	I	See Footnotes⁽³⁾⁽⁹⁾⁽¹⁰⁾⁽¹¹⁾⁽¹²⁾⁽¹³⁾
LP Units of Summit Materials Holdings L.P.	⁽²⁾	⁽²⁾	Common Stock	9,383,487	⁽²⁾	I	See Footnotes⁽⁴⁾⁽⁹⁾⁽¹⁰⁾⁽¹¹⁾⁽¹²⁾⁽¹³⁾
LP Units of Summit Materials Holdings L.P.	⁽²⁾	⁽²⁾	Common Stock	846,593	⁽²⁾	I	See Footnotes⁽⁵⁾⁽⁹⁾⁽¹⁰⁾⁽¹¹⁾⁽¹²⁾⁽¹³⁾
LP Units of Summit Materials Holdings L.P.	⁽²⁾	⁽²⁾	Common Stock	71,733	⁽²⁾	I	See Footnotes⁽⁶⁾⁽⁹⁾⁽¹⁰⁾⁽¹¹⁾⁽¹²⁾⁽¹³⁾
LP Units of Summit Materials Holdings L.P.	⁽²⁾	⁽²⁾	Common Stock	41,685	⁽²⁾	I	See Footnotes⁽⁷⁾⁽⁹⁾⁽¹⁰⁾⁽¹¹⁾⁽¹²⁾⁽¹³⁾
LP Units of Summit Materials Holdings L.P.	⁽²⁾	⁽²⁾	Common Stock	11,940	⁽²⁾	I	See Footnotes⁽⁸⁾⁽⁹⁾⁽¹⁰⁾⁽¹¹⁾⁽¹²⁾⁽¹³⁾

1. Name and Address of Reporting Person^*

Blackstone Capital Partners (Cayman) V-NQ L.P.

(Last)

(First)

(Middle)

C/O THE BLACKSTONE GROUP L.P.

345 PARK AVENUE

(Street)

NEW YORK

(City)

(State)

(Zip)

Relationship of Reporting Person(s) to Issuer

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

1. Name and Address of Reporting Person^*

Blackstone Capital Partners (Cayman) NQ V-AC L.P.

(Last)

(First)

(Middle)

C/O THE BLACKSTONE GROUP L.P.

345 PARK AVENUE

(Street)

NEW YORK

10154

(City)

(State)

(Zip)

Relationship of Reporting Person(s) to Issuer

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

1. Name and Address of Reporting Person^*

Summit BCP Intermediate Holdings L.P.

(Last)

(First)

(Middle)

C/O THE BLACKSTONE GROUP L.P.

345 PARK AVENUE

(Street)

NEW YORK

10154

(City)

(State)

(Zip)

Relationship of Reporting Person(s) to Issuer

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

1. Name and Address of Reporting Person^*

Summit BCP Intermediate Holdings GP, Ltd.

(Last)

(First)

(Middle)

C/O THE BLACKSTONE GROUP L.P.

345 PARK AVENUE

(Street)

NEW YORK

10154

(City)

(State)

(Zip)

Relationship of Reporting Person(s) to Issuer

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

1. Name and Address of Reporting Person^*

Blackstone Family Investment Partnership (Cayman) V-NQ L.P.

(Last)

(First)

(Middle)

C/O THE BLACKSTONE GROUP L.P.

345 PARK AVENUE

(Street)

NEW YORK

10154

(City)

(State)

(Zip)

Relationship of Reporting Person(s) to Issuer

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

1. Name and Address of Reporting Person^*

Blackstone Participation Partnership (Cayman) V-NQ L.P.

(Last)

(First)

(Middle)

C/O THE BLACKSTONE GROUP L.P.

345 PARK AVENUE

(Street)

NEW YORK

10154

(City)

(State)

(Zip)

Relationship of Reporting Person(s) to Issuer

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

1. Name and Address of Reporting Person^*

Blackstone Management Associates (Cayman) V-NQ L.P.

(Last)

(First)

(Middle)

C/O THE BLACKSTONE GROUP L.P.

345 PARK AVENUE

(Street)

NEW YORK

10154

(City)

(State)

(Zip)

Relationship of Reporting Person(s) to Issuer

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

1. Name and Address of Reporting Person^*

BCP V-NQ GP L.L.C.

(Last)

(First)

(Middle)

C/O THE BLACKSTONE GROUP L.P.

345 PARK AVENUE

(Street)

NEW YORK

10154

(City)

(State)

(Zip)

Relationship of Reporting Person(s) to Issuer

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

1. Name and Address of Reporting Person^*

Blackstone LR Associates (Cayman) V-NQ Ltd.

(Last)

(First)

(Middle)

C/O THE BLACKSTONE GROUP L.P.

345 PARK AVENUE

(Street)

NEW YORK

10154

(City)

(State)

(Zip)

Relationship of Reporting Person(s) to Issuer

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

Explanation of Responses:

1. Reflects securities held directly by Summit Owner Holdco LLC. Summit Owner Holdco LLC is controlled by Summit Materials Holdings GP, Ltd. ("Summit GP"). Summit GP may be deemed to be controlled by Blackstone Capital Partners (Cayman) V-NQ L.P., Blackstone Capital Partners (Cayman) NQ V-AC L.P., Blackstone Family Investment Partnership (Cayman) V NQ L.P. and Blackstone Participation Partnership (Cayman) V NQ L.P.

2. 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 on a one-for-one basis.

3. Reflects securities of the issuer held directly by Blackstone Capital Partners (Cayman) V-NQ L.P.

4. Reflects securities of the issuer held directly by Blackstone Capital Partners (Cayman) 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 (Cayman) V-NQ L.P., Blackstone Capital Partners (Cayman) NQ V-AC L.P., Blackstone Family Investment Partnership (Cayman) V NQ L.P. and Blackstone Participation Partnership (Cayman) V NQ L.P.

6. Reflects securities of the issuer held directly by Blackstone Family Investment Partnership (Cayman) V NQ L.P.

7. Reflects securities of the issuer held directly by Blackstone Participation Partnership (Cayman) V NQ L.P. (collectively with Blackstone Capital Partners (Cayman) V-NQ L.P., Blackstone Capital Partners (Cayman) NQ V-AC L.P., Summit BCP Intermediate Holdings L.P. and Blackstone Family Investment Partnership (Cayman) V NQ L.P., the "Blackstone Funds").

8. Reflects securities held directly by Summit GP. Summit GP may be deemed to be controlled by Blackstone Capital Partners (Cayman) V-NQ L.P., Blackstone Capital Partners (Cayman) NQ V-AC L.P., Blackstone Family Investment Partnership (Cayman) V NQ L.P. and Blackstone Participation Partnership (Cayman) V NQ L.P.

9. The general partner of each of Blackstone Capital Partners (Cayman) V-NQ L.P. and Blackstone Capital Partners (Cayman) 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 (Cayman) V NQ L.P. and Blackstone Participation Partnership (Cayman) V NQ L.P. are Blackstone LR Associates (Cayman) V-NQ Ltd. and BCP V-NQ L.L.C.

10. 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.

11. Due to the limitations of the electronic filing system Blackstone Holdings II L.P., Blackstone Holdings I/II GP Inc., The Blackstone Group L.P., Blackstone Group Management L.L.C. and Stephen A. Schwarzman are filing a separate Form 3.

12. 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.

13. 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, Summer Owner Holdco LLC and Summit GP, 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.

Remarks:

	BLACKSTONE FAMILY INVESTMENT PARTNERSHIP (CAYMAN) V NQ L.P., By: Blackstone Management Associates (Cayman) V-NQ L.P., its GP, By: BCP V-NQ GP L.L.C., its GP, By: /s/ John G. Finley, Name: John G. Finley, Title: Chief Legal Officer	03/12/2015
	BLACKSTONE CAPITAL PARTNERS (CAYMAN) NQ V-AC L.P., By: Blackstone Management Associates (Cayman) V-NQ L.P., its general partner, By: BCP V-NQ GP L.L.C., its general partner, By: /s/ John G. Finley, Name: John G. Finley, Title: Chief Legal Officer	03/12/2015
	SUMMIT BCP INTERMEDIATE HOLDINGS L.P., By: Summit BCP Intermediate Holdings GP, Ltd., its general partner, By: /s/ Neil P. Simpkins, Name: Neil P. Simpkins, Title: Director	03/12/2015
	SUMMIT BCP INTERMEDIATE HOLDINGS GP, LTD., By: /s/ Neil P. Simpkins, Name: Neil P. Simpkins, Title: Director	03/12/2015
	BLACKSTONE CAPITAL PARTNERS (CAYMAN) V-NQ L.P., By: BCP V-NQ GP L.L.C., its general partner, By: /s/ John G. Finley, Name: John G. Finley, Title: Chief Legal Officer	03/12/2015
	BLACKSTONE PARTICIPATION PARTNERSHIP (CAYMAN) V NQ L.P., By: BCP V-NQ GP L.L.C., its general partner, By: /s/ John G. Finley, Name: John G. Finley, Title: Chief Legal Officer	03/12/2015
	BLACKSTONE MANAGEMENT ASSOCIATES (CAYMAN) V-NQ L.P., By: BCP V-NQ GP L.L.C., its general partner, By: /s/ John G. Finley, Name: John G. Finley, Title: Chief Legal Officer	03/12/2015
	BCP V-NQ GP L.L.C., By: /s/ John G. Finley, Name: John G. Finley, Title: Chief Legal Officer	03/12/2015
	BLACKSTONE LR ASSOCIATES (CAYMAN) V-NQ LTD., By: /s/ John G. Finley, Name: John G. Finley, Title: CLO, Chief Administrative Officer	03/12/2015
	** Signature of Reporting Person	Date
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 5 (b)(v).
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