Space infrastructure has rapidly transitioned from a playground for speculative venture capital to a strictly physical, cash-flow-driven defense business. For investors tracking this sector, the challenge is finding businesses that balance high-growth addressable markets with actual, sustainable profitability. MDA Space (NYSE: MDA) captures this dynamic perfectly. Following a wave of aggressive expansion, including a C$688 million (approx. $490 million) satellite contract with the Canadian Space Agency and a $620 million strategic acquisition of Blue Canyon Technologies from RTX Corp (NYSE: RTX), MDA Space is positioning itself as a cross-border defense champion.