Walter Energy Inc. (NYSE:WLT), Radius Health Inc. (NASDAQ:RDUS) and Lululemon Athletics Inc. (NASDAQ:LULU) made major gains this Thursday. Ending the day in the negative column are MasTec Inc. (NYSE:MTZ), SandRidge Energy Inc. (NYSE:SD) and Celladon Corp. (NASDAQ:CLDN).

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Walter Energy Rebounds

Walter Energy Inc. ended the day up +17.54%, rebounding after a dismal few days. A producer and exporter of metallurgical coal, Walter Energy is a new Q3 buy for Brazilian billionaire Jorge Lemann.

[drizzle]Radius Health Inc. gained +10.31% this Thursday, ending the day priced at $24.60. Thomas Steyer’s Farallon Capital initiated a position in the company in the second quarter of this year and as of the third quarter holds 950,000 RDUS shares. The biopharmaceutical company has gained +58.61% over the past three months.

Lululemon Athletica surged +9.11% in the wake of its third quarter earnings report – even though its numbers weren’t stellar, nor was its holiday outlook optimistic. The athletic apparel retailer, a new Q3 buy for Ray Dalio’s Bridgewater Associates, has declined -13.67% YTD.

MasTec Tumbles

MasTec Inc. tumbled -10.85% today. Zacks has given the company an underperform rating, and short interest in the stock is on the rise. MasTec, an infrastructure construction company, has fallen -38.45% YTD and -18.82% over the past month. Billionaire Julian Robertson picked up 563,000 MTZ shares in Q3, giving the company a 4.57% allocation in his public equity portfolio.

SandRidge Energy posted a -9.6% loss, putting its five-day performance at -23.83%. Leon Cooperman has had a stake in the company since the fourth quarter of 2012 and as of the third quarter of this year holds 45.48 million SD shares.

Celladon Corporation fell -8.59%, dipping after what’s been a +30% month-long run. The biotech company has been one of Farallon Capital’s strongest investments of the year.

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