Weekly gainers for December 27, 2013 are Coronado Biosciences Inc (NASDAQ:CNDO), Eagle Bulk Shipping Inc. (NASDAQ:EGLE), Idenix Pharmaceuticals Inc (NASDAQ:IDIX) and weekly losers are Textura Corp (NYSE:TXTR), Enzon Pharmaceuticals Inc (NASDAQ:ENZN), CarMax, Inc (NYSE:KMX).

Coronado Biosciences

Thomas Steyer wins with Coronado Biosciences

On the top of our weekly gainers list is Coronado Biosciences Inc (NASDAQ:CNDO), the  clinical stage biopharmaceutical company shot up +44.76%, hitting $2.93 this week. Billionaire Thomas Steyer holds 117,000 shares, composing 0.02% of his fund. The investor paid an average price of $7.40 per share.

Eagle Bulk Shipping Inc. (NASDAQ:EGLE) is the second stock in our weekly gainers list. The ocean transportation company rose +43.27% during this week, reaching $4.37. As of September, Richard Chilton holds 293,000 shares, which compose 0.06% of his fund. The investor paid an average price of $4.78 per asset.

Third and last stock is Idenix Pharmaceuticals Inc (NASDAQ:IDIX), the biopharmaceutical company increased +40.28% to $6.50 in the last five days. This was a well-received news for Seth Klarman who holds 39.8 million shares (4.40% of his fund), acquired for $5.41 per share.

Weekly Losers

On the top of our weekly losers is Textura Corp (NYSE:TXTR), the tech company dipped -22.15% to $30.00 during this week. During last quarter billionaire George Soros bought 26,000 shares for $34.80. This position represents 0.01% of his fund.

Following Textura Corp is Enzon Pharmaceuticals Inc (NASDAQ:ENZN), the healthcare stock dropped -22.00% to $1.14 in the last five days. Billionaire Klarman owns 7.6 million shares (0.37% of his portfolio) acquired for $3.32 per share. Another investor with a position in ENZN is Carl Icahn who owns 5.9 million shares, composing 0.04% of his holdings. Icahn paid an average price of $3.59 per asset.

Last stock in our weekly losers list is CarMax, Inc (NYSE:KMX), the retailer of used vehicles decreased -10.52%, reaching $46.49. Investor Richard Chilton picked up 528,000 shares for $49.10 per asset. This position composes 0.71% of the billionaire’s holdings.