Anderson Karli S.

Date	Company	Security	Transaction	Code	Indirect	10b5-1	$Price	#Shares	$Value	#Remaining
10 Feb 25	SUM Summit Materials	Class A Common Stock	Sale back to company	Dispose D	No	No	52.5	48,285	2.53 mm	0
10 Feb 25	SUM Summit Materials	Performance Stock Units Class A Common Stock	Sale back to company	Dispose D	No	No	0	13,589	0.00	0
10 Feb 25	SUM Summit Materials	Performance Stock Units Class A Common Stock	Sale back to company	Dispose D	No	No	0	9,222	0.00	0
10 Feb 25	SUM Summit Materials	RSU Class A Common Stock	Sale back to company	Dispose D	No	No	0	15,289	0.00	0
16 Jan 25	SUM Summit Materials	Class A Common Stock	Payment of exercise	Dispose F	No	No	52.19	2,318	120.98 k	48,285
16 Jan 25	SUM Summit Materials	Class A Common Stock	Grant	Acquire A	No	No	0	7,587	0.00	50,603
15 Jan 25	SUM Summit Materials	RSU Class A Common Stock	Grant	Acquire A	No	No	0	15,289	0.00	15,289
20 Dec 24	SUM Summit Materials	Class A Common Stock	Payment of exercise	Dispose F	No	No	50.5	9,690	489.35 k	43,016
20 Dec 24	SUM Summit Materials	Class A Common Stock	Option exercise	Acquire M	No	No	0	13,589	0.00	52,706
20 Dec 24	SUM Summit Materials	Class A Common Stock	Option exercise	Acquire M	No	No	0	6,148	0.00	39,117

Data from 3, 4 and 5 filings. Values as filed, not updated for current price.