What happens when a shareholder purchases some of the stock to alter the corporate culture? to invoke social change? Or even to strip a corporation of some of its assets? YLR Host Jeff Hayden is joined tonight by co-host Joshua Borger. Guiding us through this phenomenum: David J. Berger, a partner and co-chair of Corporate Governance at the Silicon Valley firm of Wilson Sonsini Goodrich & Rosati, and Derek Zaba, a partner and co-chair of the shareholder activisim practice at Sidley Austin