MF
SUM

Magnetar Financial’s Summit Materials, Inc. Class A Common Stock SUM Stock Holding History

Magnetar Financial’s Portfolio SUM Stock Details SUM Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2025
Q1 		– Sell
2024
Q4 		$79.1M Buy
2024
Q3 		– Sell
2024
Q2 		$1.28M Buy
2023
Q4 		– Sell
2023
Q3 		$300K Buy
2018
Q2 		– Sell
2018
Q1 		$879K Buy
2017
Q4 		$421K Buy
2015
Q2 		– Sell
2015
Q1 		$2.21M Buy