Dell

Carl Icahn made his Twitter debut on June 20th, 2013. He saluted the Twitterverse and, in true Icahn style, gave a shout-out to one of his top picks of the moment — Dell. “Twitter is great,” he wrote. “I like it almost as much as I like Dell.”

Farallon Capital Management’s Thomas Steyer was one busy investor in the fourth quarter of 2013. While the quantity of his holdings remained relatively stable — 79 as opposed to 77 in Q3 — he made a number…