Receptos Inc (NASDAQ:RCPT), The Medicines Company (NASDAQ:MDCO) and Vanda Pharmaceuticals Inc. (NASDAQ:VNDA) hit midday posting notable gains this Tuesday. In the red today are Twitter Inc (NYSE:TWTR), Sanofi SA (ADR) (NYSE:SNY) and Gulf Coast Ultra Deep Royalty Trust – Royalty Trust Unit (NASDAQ:GULTU).

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Receptos Inc. Continues to Pay Off for Farallon Capital

Receptos Inc (NASDAQ:RCPT) climbed an impressive +44.04% early in the day thanks to positive news out of one of its drug studies. Farallon Capital has knocked it out of the park in betting on the biotech company – the fund initiated a 10,000-share position in Q4 2013, upped it to 310,000 shares in Q1 and as of Q2 holds 290,000 RCPT shares. Receptos has gained +234.25% year-to-date.

[drizzle]The Medicines Company (NASDAQ:MDCO) got a +12.71% boost off of its patent infringement victory against Mylan. MCDO first filed suit in 2011. Despite today’s jump, the George Soros pick is still down -35.24% in 2014.

Vanda Pharmaceuticals Inc. (NASDAQ:VNDA) gained +12.68% early in the day, putting its five-day gain at +21.68%. The biopharmaceutical company reported third quarter results yesterday, including total revenues of $14.8 million. John Paulson initiated a stake in VNDA at the start of the year and as of Q2 holds 3.2 million shares.

Twitter Takes a Dive Following Results

Twitter Inc (NYSE:TWTR) hit midday down -10.17% in the wake of yesterday’s results report after the bell. While the social media giant experienced a sharp rise in revenue, user growth has stalled – the result of what many believe is a lack of innovation. Tiger Global has held 500,000 TWTR shares since Q4 2013, and George Soros picked up 150,000 in Q2 2014. It hasn’t been a great year for Twitter, which has declined -31.69% YTD.

Sanofi SA (ADR) (NYSE:SNY) dipped -9.84% early in the day after it reported a drop in quarterly earnings and warned of pricing pressure on its diabetes treatment in the United States. The French drug maker, a long-time Warren Buffett pick, has declined -8.45% over the past year.

The share price of Gulf Coast Ultra Deep Royalty Trust – Royalty Trust Unit (NASDAQ:GULTU) fell -9.09% this Tuesday. Leon Cooperman and John Paulson have positions in the company, as does Farallon Capital.

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