Live feed21:39:59·830dINSIDERFilingvia QuantisnowNew insider Argos Sem, Llc claimed ownership of 54,720,000 shares and claimed ownership of 1 units of Series A Non-Convertible Preferred Stock (SEC Form 3)ByQuantisnow·Wall Street's wire, on your screen.SUM· Summit Materials Inc.IndustrialsOriginal source