MOORE MARSHALL D (See Remarks) reported 1 transaction at SUMMIT MATERIALS, INC.

Review the transaction codes below to understand the nature of each event.

MOORE MARSHALL D

Filed: 2/10/2025ACC: 0000950103-25-001819

InsiderMOORE MARSHALL DCIK 1696391

→

IssuerSUMMIT MATERIALS, INC.CIK 1621563

Officer· See Remarks

Since Jan 2024

-35.06K

Net shares

Net seller

$16.3K

Total sold

Open market trades

0B · 0S

Total transactions

35.06K disposed

Non-Derivative Transactions1

Class A Common Stock

Direct

D · Disposition

−310.00

Price / share

$52.50

Trade value

$16.27K

% of position

New position

2/10/2025

310.00→0.00

Total

Net shares

−310.00

Net value

-$16.27K

Security	Date	Type	Shares	Price / Share	Trade Value	% of Position	Held Before	Held After
Class A Common Stock Direct	2/10/2025	D · Disposition	−310.00	$52.50	$16.27K	New position	310.00	0.00
Total			−310.00		-$16.27K

Derivative Transactions4

Restricted Stock Units

Direct

D · Disposition

Converts to

Class A Common Stock

5.50K shares

−5.50K

Strike price

Held after

0.00

Exercisable

—

2/10/2025

Restricted Stock Units

Direct

D · Disposition

Converts to

Class A Common Stock

8.19K shares

−8.19K

Strike price

Held after

0.00

Exercisable

—

2/10/2025

Restricted Stock Units

Direct

D · Disposition

Converts to

Class A Common Stock

12.87K shares

−12.87K

Strike price

Held after

0.00

Exercisable

—

2/10/2025

Performance Stock Units

Direct

D · Disposition

Converts to

Class A Common Stock

8.19K shares

−8.19K

Strike price

Held after

0.00

Exercisable

—

2/10/2025

Security	Converts To	Date	Type	Shares	Exercisable
Restricted Stock Units Direct	Class A Common Stock5.50K shares	2/10/2025	D · Disposition	−5.50K	—
Restricted Stock Units Direct	Class A Common Stock8.19K shares	2/10/2025	D · Disposition	−8.19K	—
Restricted Stock Units Direct	Class A Common Stock12.87K shares	2/10/2025	D · Disposition	−12.87K	—
Performance Stock Units Direct	Class A Common Stock8.19K shares	2/10/2025	D · Disposition	−8.19K	—