SEC FORM 4

SEC FORM 4 SEC Form 4

FORM 4

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
or Section 30(h) of the Investment Company Act of 1940

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

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Anderson Karli S.

(Last)

(First)

(Middle)

C/O SUMMIT MATERIALS, INC.

1801 CALIFORNIA STREET, SUITE 3500

(Street)

DENVER

80202

(City)

(State)

(Zip)

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

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

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

3. Date of Earliest Transaction (Month/Day/Year)
02/10/2025

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

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

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

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	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 (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	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	02/10/2025		D		48,285⁽¹⁾	D	$52.5⁽¹⁾	0	D

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 (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	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 (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (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: 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 (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)		10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
Restricted Stock Units	⁽¹⁾	02/10/2025		D			15,289	⁽¹⁾	⁽¹⁾	Class A Common Stock	15,289	⁽¹⁾	0	D
Performance Stock Units	⁽¹⁾	02/10/2025		D			9,222	⁽¹⁾	⁽¹⁾	Class A Common Stock	9,222	⁽¹⁾	0	D
Performance Stock Units	⁽¹⁾	02/10/2025		D			13,589	⁽¹⁾	⁽¹⁾	Class A Common Stock	13,589	⁽¹⁾	0	D

Explanation of Responses:

1. At or immediately prior to the effective time of the transactions contemplated by the Agreement and Plan of Merger, dated November 24, 2024, by and among Summit Materials, Inc., Quikrete Holdings, Inc., and Soar Subsidiary, Inc., (i) each share of Class A common stock of the issuer held by the reporting person was canceled, retired and converted into the right to receive $52.50 in cash (the "Merger Consideration"), (ii) each restricted stock unit held by the reporting person was fully vested, canceled and converted into the right to receive the Merger Consideration and (iii) each performance stock unit award held by the reporting person was vested based on target performance, canceled and converted into the right to receive the Merger Consideration.

Remarks:

EVP, Chief People and ESG Officer and Head of Communications

	/s/ Christopher B. Gaskill, as Attorney-in-Fact	02/10/2025
	** 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 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.

Officer Anderson Karli S. returned $2,534,962 worth of shares to the company (48,285 units at $52.50), closing all direct ownership in the company (SEC Form 4)