It's that time of year. Big names of the financial world including David Einhorn, Whitney Tilson, Dan Loeb, and T. Boone Pickens are at the Robin Hood Investor's Conference in New York, and they're presenting some of their best long and short ideas.

Here's a rundown:

David Einhorn reiterates his long call for Consol Energy

Despite taking a beating on this particular position, the president of Greenlight Capital isn't throwing in the towel yet. He has held the stock for more than a year, watching it fall more than 75 percent while adding to his position along the way.

Jamie Dimon owns Yum Brands, Boeing, and Union Pacific

While the CEO of JPMorgan Chase wasn't at the conference to pitch his "best idea" but rather to shed some light on the overall economy in a fireside chat, he did call out the above corporate names. Dimon is also said to be bullish on China.

Scott Ferguson of Sachem is long Akorn

You could say that the managing partner of Sachem Head Capital management is quite bullish on Akron. The money manager told conference attendees that shares of the eye-care product maker could double within the next two years. He also said that the company could be a target of drug giant Mylan or its former takeover target Perrigo. 

Dan Loeb praises Allergan and suggests possible merger

The Third Point founder continues the health care theme by touting the possibility of an Amgen-Allergan merger. The famed investor also said that a merger between Allergan and Pfizer isn't out of the question. 

Samantha Greenberg of Paulson sees big potential for Charter

Shares of Charter have been on quite the ride this year, and Greenberg thinks that's likely to continue. The Paulson & Co. managing director expects shares to climb from their current level of $186 to $294 within the next 12-18 months.

Larry Robbins of Glenview likes FMC

Robbins and Glenview had previously reported a passive stake in the firm, but he took this opportunity to reiterate his call. He also said he likes HCA and Monsanto.  

Philippe Laffont recommends longs in Activision and Electronic Arts

Laffont had two 'buy' recommendations from the entertainment sector for investors. The chief investment officer of Coatue Management likes Activision and Electronic Arts, both of which operate in the gaming space with entertainment software. 

Whitney Tilson reiterates short of Wayfair while pitching long for Spirit Airlines

The head of Kase Capital Management had a few ideas for both the longs and the shorts. On the bullish side, Tilson recommends Spirit Airlines, calling it "A long-term growth story priced as if growth is gone forever." On the bearish side, he says Wayfair is his favorite short, citing formaldehyde issues and insider selling.

Other interesting discussions included David Tepper calling the Yuan extremely overvalued and T. Boone Pickens telling investors to brace for $70 oil by June.