SMS Equipment is a subsidiary of Sumitomo. SMS Equipment opens $30 million expansion in Timmins - Equipment Journal SMS sells Komatsu equipment and they are working on electrification of construction and mining equipment. Electrification | SMS Equipment   and    Komatsu's latest lineup of EDTs | SMS Equipment  New electric excavator delivered. SMS Equipment delivers massive Komatsu excavator to BC mine (equipmentjournal.com)