His activity bears watching because the guy seems to know a thing or two about investing. According to the folks at GuruFocus.com, over the 15 recent years ending in 2012, Loeb racked up a cumulative gain of 758%, compared with just 94% for the S&P 500.The company's reportable stock portfolio totaled $4.4 billion in value as of June 30, 2013. Interesting developments So what does Third Point's latest quarterly 13F filing tell us? Here are a few interesting details: The biggest new holdings are Elan Corporation, plc (ADR) (NYSE:ELN) and CF Industries Holdings, Inc. (NYSE:CF). Ireland-based biotech company Elan is being bought by Michigan-based drug company Perrigo Company (NASDAQ:PRGO) for $8.6 billion. One benefit for Perrigo will be headquartering the new company in Ireland, which will cut its tax rate from around 30% to around 17%. Elan had previously been pursued by Royalty Pharma, whose offers had been deemed too low. It has also been in the news as a stock that investors at the scandal-ridden hedge fund SAC Capital allegedly traded in, with insider information. Perrigo has been making savvy acquisitions and growing rapidly. Fertilizer concern CF Industries Holdings, Inc. (NYSE:CF) looks attractive with its forward P/E ratio below 7. Like Potash and others, the nitrogen and phosphate specialist may be hurt if Brazil stops importing fertilizer, but that's not likely to happen soon. Russia's exit from a major potash cartel could also spell trouble, via falling prices. Meanwhile, some peers may be hurt by changes in India, but CF is better positioned there due to its product and sales mix. It has also been benefiting from low natural gas prices, as that's used in nitrogen fertilizer. Rising nitrogen prices have helped, too. Third Point reduced its stake in lots of companies, including International Paper Company (NYSE:IP) and Constellation Brands, Inc. (NYSE:STZ). Among holdings in which Third Point increased its stake were Sotheby's and TIBCO Software Inc. (NASDAQ:TIBX). Big Data operator TIBCO has been adding recurring-revenue contracts. Of all things, staffing issues pose a problem for the company, though my colleague Anders Bylund remains a "committed owner," seeing its competitors having trouble competing with it. The company has been restructuring, with bulls hoping for improved performance. Its forward P/E of 20.6 is well below its five-year average of 31.