Office vacancy hit a five-year low, with brisk trading among corporate investors, who closed multimillion-dollar deals across South Florida.

Parkway Properties Inc. paid for $146 million, or about $421 per square foot, for the Courvoisier Centre on Miami’s Brickell Key. In Davie, for instance, the Seminole Tribe of Florida paid $11.5 million for 101,000 square feet near the Seminole Hard Rock Hotel & Casino. On Congress Avenue in Boca Raton, SBA Communications Corp. moved into a 160,000-square-foot building it bought for $22.65 million in November. And Univita Health Inc. leased 91,872 square feet at Miramar Centre Business Park.