BioCryst Pharmaceuticals (BCRX) had the highest return in Q3 2013 by a US stock with a market cap of $600M+, returning 366.7%.

ASSET	QUARTER	% RETURN
BioCryst Pharmaceuticals (BCRX)	Q3 2013	366.67%
Catalyst Pharmaceuticals (CPRX)	Q3 2013	235.16%
Iovance Biotherapeutics (IOVA)	Q3 2013	227.5%
Daqo New Energy Corp ADR (DQ)	Q3 2013	187.61%
Arrowhead Pharmaceuticals (ARWR)	Q3 2013	180.3%
Xpel (XPEL)	Q3 2013	179.07%
InnovAge (INNV)	Q3 2013	164.71%
JinkoSolar (JKS)	Q3 2013	142.47%
Empresa Distribuidora y Comercializadora Norte SA ADR (EDN)	Q3 2013	122.22%
BioLife Solutions (BLFS)	Q3 2013	120.83%
Celldex Therapeutics (CLDX)	Q3 2013	120.61%
Geron (GERN)	Q3 2013	120.39%
Facebook (META)	Q3 2013	101.17%
Alnylam Pharmaceuticals (ALNY)	Q3 2013	100.03%
Himax Technologies (HIMX)	Q3 2013	99.22%
Globalstar, Inc Common Stock (GSAT)	Q3 2013	92.92%
Vipshop (VIPS)	Q3 2013	91.76%
Ubiquiti Networks (UI)	Q3 2013	90.74%
Yelp (YELP)	Q3 2013	90.67%
Idaho Strategic Resources (IDR)	Q3 2013	87.5%
Noah (NOAH)	Q3 2013	87.36%
Star Bulk Carriers (SBLK)	Q3 2013	85.87%
Plug Power (PLUG)	Q3 2013	85%
Grupo Financiero Galicia SA ADR (GGAL)	Q3 2013	84.66%
Tesla (TSLA)	Q3 2013	76.82%