A luxurious Miami estate with roots in the legendary Howard Hughes's land holdings has been listed for $55.5 million. The property, built in 2003, is on land once owned by the eccentric billionaire, who amassed a vast real estate portfolio across the

Bill Ackman's Pershing Square is offering to take over the rest of Howard Hughes Holdings the investment firm does not own for $85 a share."While we are pleased with the substantial business progress Howard Hughes Holdings has made over the more than 14 years since it went public,

Shares of Howard Hughes Holdings jumped after hedge-fund manager Bill Ackman's firm offered to buy 11.8 million Howard Hughes shares at $85 apiece to own a majority stake in the company. The stock jumped about 9.

Under the proposed deal, a Pershing Square unit will buy 11.8 million shares for $1 billion from non-Pershing Square affiliate shareholders of Howard Hughes, while the real estate developer will commence a $500 million share repurchase at $85 per share for up to 5.9 million shares.

Pershing Square's potential majority stake could influence Howard Hughes' future, but risks remain. See my recommendation on HHH stock.