Castellum (CTM) had the best month in 2013 by a US stock in November 2013, returning 650,300%.

ASSET	MONTH	% RETURN
Castellum (CTM)	November 2013	650,300%
INVO Fertility (IVF)	May 2013	322,460.06%
Prairie Operating Co Common Stock (PROP)	February 2013	56,370.59%
Rezolute (RZLT)	January 2013	2,207.68%
Almonty Industries Inc Common Shares (ALM)	June 2013	908.03%
Nutex Health (NUTX)	April 2013	900%
AmpliTech (AMPG)	June 2013	680%
Quantum Computing (QUBT)	February 2013	566.67%
Supercom (SPCB)	March 2013	566.67%
Cosmos Health (COSM)	March 2013	550%
Dolphin Entertainment (DLPN)	February 2013	400%
OLB (OLB)	June 2013	350%
GT Biopharma (GTBP)	September 2013	258.06%
TOMI Environmental Solutions (TOMZ)	June 2013	256.25%
Iovance Biotherapeutics (IOVA)	July 2013	250%
Quantum Computing (QUBT)	April 2013	242.86%
Stereotaxis (STXS)	July 2013	242.46%
Armata Pharmaceuticals (ARMP)	July 2013	240%
Ryvyl (RVYL)	March 2013	233.33%
Ryvyl (RVYL)	June 2013	231.75%
Scienture (SCNX)	September 2013	228.57%
Dolphin Entertainment (DLPN)	July 2013	225%
VerifyMe (VRME)	January 2013	222.03%
Kazia Therapeutics Ltd ADR (KZIA)	February 2013	213.56%
Electromed (ELMD)	December 2013	203.57%