NOONAN ANNE P (President & CEO) exercised options at SUMMIT MATERIALS, INC.

Option exercise — a mechanical event triggered by vesting or expiry. Not a discretionary conviction trade.

M · 3 exercises

NOONAN ANNE P

Filed: 12/26/2024ACC: 0001628280-24-052435

InsiderNOONAN ANNE PCIK 1620412

→

IssuerSUMMIT MATERIALS, INC.CIK 1621563

DirectorOfficer· President & CEO

Since Sep 2020

-54.41K

Net shares

Net seller

$2.75M

Total sold

Open market trades

0B · 0S

Total transactions

124.35K acquired · 178.76K disposed

Non-Derivative Transactions4

Class A Common Stock

Direct

M · Option Exercise

+36.24K

Price / share

—

Trade value

—

% of position

13.9%

12/20/2024

260.22K→296.46K

Class A Common Stock

Direct

M · Option Exercise

+71.48K

Price / share

—

Trade value

—

% of position

24.1%

12/20/2024

296.46K→367.94K

Class A Common Stock

Direct

M · Option Exercise

+16.63K

Price / share

—

Trade value

—

% of position

4.5%

12/20/2024

367.94K→384.57K

Class A Common Stock

Direct

F · Tax Withholding

−54.41K

Price / share

$50.50

Trade value

$2.75M

% of position

14.1%

12/20/2024

384.57K→330.17K

Total

Net shares

+69.95K

Net value

-$2.75M

Security	Date	Type	Shares	Price / Share	Trade Value	% of Position	Held Before	Held After
Class A Common Stock Direct	12/20/2024	M · Option Exercise	+36.24K	—	—	13.9%	260.22K	296.46K
Class A Common Stock Direct	12/20/2024	M · Option Exercise	+71.48K	—	—	24.1%	296.46K	367.94K
Class A Common Stock Direct	12/20/2024	M · Option Exercise	+16.63K	—	—	4.5%	367.94K	384.57K
Class A Common Stock Direct	12/20/2024	F · Tax Withholding	−54.41K	$50.50	$2.75M	14.1%	384.57K	330.17K
Total			+69.95K		-$2.75M

Derivative Transactions3

Restricted Stock Units

Direct

M · Option Exercise

Converts to

Class A Common Stock

36.24K shares

−36.24K

Strike price

Held after

0.00

Exercisable

—

12/20/2024

Restricted Stock Units

Direct

M · Option Exercise

Converts to

Class A Common Stock

71.48K shares

−71.48K

Strike price

Held after

0.00

Exercisable

—

12/20/2024

Restricted Stock Units

Direct

M · Option Exercise

Converts to

Class A Common Stock

16.63K shares

−16.63K

Strike price

Held after

0.00

Exercisable

—

12/20/2024

Security	Converts To	Date	Type	Shares	Exercisable
Restricted Stock Units Direct	Class A Common Stock36.24K shares	12/20/2024	M · Option Exercise	−36.24K	—
Restricted Stock Units Direct	Class A Common Stock71.48K shares	12/20/2024	M · Option Exercise	−71.48K	—
Restricted Stock Units Direct	Class A Common Stock16.63K shares	12/20/2024	M · Option Exercise	−16.63K	—