Athersys, Inc. (NASDAQ:ATHX), Adept Technology Inc (NASDAQ:ADEP) and URS Corp (NYSE:URS) ended the short week strong and are the day’s top stock market gainers. The losers are International Tower Hill Mines Ltd (NYSEMKT:THM), MBIA Inc. (NYSE:MBI) and Sibanye Gold Ltd (ADR) (NYSE:SBGL).


Athersys Climbs on Upgrade

Athersys, Inc. (NASDAQ:ATHX) closed the day up +6.59%, rendering it this Thursday’s top market gainer. Earlier in the week, Zacks upgraded its rating of the biotech company from underperform to neutral. The Q1 George Soros pick has climbed +7.78% since then.

Adept Technology Inc (NASDAQ:ADEP) surged +6.37%. A provider of intelligent robots and autonomous mobile solutions and services, the company is down -34.75% YTD. George Soros initiated a 37,000-share position in ADEP during the first quarter of the year.

Up +5.74%, URS Corp (NYSE:URS) is today’s third top gainer. Today marks the seventh consecutive day the stock has increased. In the investment portfolios of billionaire hedge fund managers David Einhorn and Ray Dalio, URS has climbed +13.49% over the past month.

Paulson Mining Picks End Week in the Red

International Tower Hill Mines Ltd (NYSEMKT:THM) ended the week on a sour note, its price falling -4.97% on Thursday. Billionaire John Paulson has held 8.9 million THM shares across several quarters – 0.03% of his entire portfolio. Despite today’s dip, the share price of the exploration-stage company has increased +70.73% in 2014.

MBIA Inc. (NYSE:MBI) dipped -4.92%, hitting a new year-to-date low. Earlier this week, BTIG Equity Research downgraded the company on concerns over the bond insurer’s exposure to the debt of the Puerto Rico Electric Power Authority (PREPA). The George Soros pick has declined -24.39% over the past three months.

The share price of Sibanye Gold Ltd (ADR) (NYSE:SBGL) fell -4.56%. Earlier in the week, the South African gold producer said it was weighing plans to push into the platinum sector. John Paulson initiated a position in Sibanye Gold during the first quarter of 2013 and has maintained his 1.6 million shares since. SBGL is up an impressive +117.26% YTD.