MAGGNUM Ventures Inc., Calgary Canada - Matthew Grieve The principals behind Maggnum possess decades of experience in real estate construction, development and management. The firm’s portfolio includes a range of holdings with a particular focus on real estate. Maggnum will lead development opportunities or joint venture / partner with proven teams as well as provide angel capital for start up enterprises. Maggnum is aggressively exploring innovative projects in several industries with particular interest in Western Canadian projects.