Shark Tank star and businessman Kevin O'Leary has always nicknamed himself "Mr. Wonderful," but now he's adding another ...

Even though 'Shark Tank' is popular for its tough tactics, there have been moments when the investors were left emotional ...

In a rare Shark Tank twist, Mark Cuban snatched Petite Keep from Kevin O’Leary, who had already gone all in on the pitch.

DMC Global has named James O'Leary president and chief executive of the manufacturing company, making permanent a position he had held on an interim basis since late November.