At Apria they forced out managers and directors who failed to stem the company's red ink.

FORBES: Follow-Through

They've taken stakes in Waste Management, Tektronix, ICN Pharmaceuticals and Apria Healthcare Group, among others.

FORBES: Follow-Through

An example of this new approach was the appointment of Ralph Whitworth, an institutional investor with a reputation for activism, to the board of Apria Healthcare last year and more recently as chairman of Waste Management, a troubled company.

ECONOMIST: Thank you and goodbye