Hey, you looking for a place on Manhattan's Upper West Side? Well, if you've got $20 million, Bill Ackman might be able to help you. The billionaire hedge fund manager has listed two neighboring apartments for a total of $19.9 million, seven years after ...

Unsurprisingly, billionaire investor Bill Ackman added to his position in footwear giant Nike (NYSE:NKE) during the last quarter. As to whether Ackman is finished building his position remains the multi-billion-dollar question.

Ackman has been loading up on shares of Brookfield. Brookfield is one of my top portfolio holdings. The company's best days lie ahead. Brookfield isn't a household name among most investors, and the Canadian investment manager's operation might seem a bit complex at first glance.

Over the last two quarters, Ackman has built two new significant positions for Pershing Square -- Nike (NYSE: NKE) and Brookfield (NYSE: BN) -- piling an estimated $2.2 billion into those stocks during the third quarter alone. Here's why.