These days, it's tough to say if Carl Icahn is most brilliant in his investing or public relations. Either way, he can't be beat. From cashing in half of his Netflix stake this week to pocket $800 million in profit, to teasing the launch of a new website by invoking the Apple brand, Carl Icahn is a genius on many fronts, it seems.

Recently, the billionaire investor once again lobbied (this time via written letter) Apple CEO Tim Cook in his relentless effort to inspire Apple to proceed with a larger share buyback. What did Icahn tell Cook exactly? We're about to find out.