Green Brick Partners (GRBK) had the highest return in March 2014 by a US stock with a market cap of $300M+, returning 151.7%.

ASSET	MONTH	% RETURN
Green Brick Partners (GRBK)	March 2014	151.73%
Celsius (CELH)	March 2014	97.7%
Iovance Biotherapeutics (IOVA)	March 2014	76.45%
Plug Power (PLUG)	March 2014	54.35%
RadNet (RDNT)	March 2014	43.43%
Climb Global Solutions (CLMB)	March 2014	38.84%
Orthofix Medical (OFIX)	March 2014	36.24%
POET Technologies (POET)	March 2014	35.87%
STAAR Surgical (STAA)	March 2014	34.96%
Avadel Pharmaceuticals (AVDL)	March 2014	34%
Lithium Argentina (LAR)	March 2014	33.87%
Corcept Therapeutics (CORT)	March 2014	33.74%
Anavex Life Sciences (AVXL)	March 2014	32.35%
Centrais Electricas Brasileiras (EBR)	March 2014	32.1%
Golden Ocean (GOGL)	March 2014	31.3%
Vericel Corp Ord (VCEL)	March 2014	31.04%
Agios Pharm (AGIO)	March 2014	30.41%
Crawford (CRD.B)	March 2014	30.22%
AeroVironment (AVAV)	March 2014	29.84%
Vaalco Energy (EGY)	March 2014	28.77%
Spok (SPOK)	March 2014	28.45%
NV5 Global (NVEE)	March 2014	27.84%
TKO (TKO)	March 2014	27.29%
Global Industrial (GIC)	March 2014	27%
Ballard Power Systems (BLDP)	March 2014	26.8%