Castellum (CTM) had the highest return in Q4 2013 by a US stock, returning 534,553.5%.

ASSET	QUARTER	% RETURN
Castellum (CTM)	Q4 2013	534,553.47%
DarioHealth (DRIO)	Q4 2013	1,160%
INVO Fertility (IVF)	Q4 2013	558.54%
Enveric Biosciences (ENVB)	Q4 2013	438.46%
Astrotech (ASTC)	Q4 2013	277.33%
Fonar (FONR)	Q4 2013	265.06%
Tenax Therapeutics (TENX)	Q4 2013	216.9%
Electromed (ELMD)	Q4 2013	214.81%
Maywood Acquisition Corp Class A Ordinary Shares (MAYA)	Q4 2013	160.33%
Oramed Pharmaceuticals (ORMP)	Q4 2013	151.71%
SRx Health Solutions (SRXH)	Q4 2013	150%
Camtek (CAMT)	Q4 2013	136.83%
Mr Cooper (COOP)	Q4 2013	135%
Sphere 3D (ANY)	Q4 2013	133.15%
Precision Optics Corporation, Inc Common stock (POCI)	Q4 2013	125%
Coda Octopus (CODA)	Q4 2013	117.59%
Vivakor (VIVK)	Q4 2013	116.67%
BOS Better Online Solutions (BOSC)	Q4 2013	115.28%
Sellas Life Sciences (SLS)	Q4 2013	111.06%
Perdoceo Education (PRDO)	Q4 2013	108.79%
Universal Insurance (UVE)	Q4 2013	108.16%
Plug Power (PLUG)	Q4 2013	106.67%
ANI Pharmaceuticals (ANIP)	Q4 2013	102.4%
Corcept Therapeutics (CORT)	Q4 2013	100.63%
Inotiv (NOTV)	Q4 2013	99.19%