GeoVax Labs (GOVX) had the best quarter in 2019 by a US stock in Q3 2019, returning 133,291,574.5%.

ASSET	QUARTER	% RETURN
GeoVax Labs (GOVX)	Q3 2019	133,291,574.51%
Fubotv (FUBO)	Q1 2019	1,642,091.78%
MMTEC (MTC)	Q1 2019	752,748.72%
Weatherford International (WFRD)	Q4 2019	100,097.43%
Nutex Health (NUTX)	Q4 2019	64,416.13%
Synergy CHC Corp Common Stock (SNYR)	Q4 2019	4,900%
Teekay Tankers (TNK)	Q4 2019	1,743.88%
FitLife Brands, Inc Common Stock (FTLF)	Q2 2019	1,613.04%
OrganiGram (OGI)	Q2 2019	1,363.72%
Worksport (WKSP)	Q1 2019	1,233.33%
Sobr Safe (SOBR)	Q4 2019	971.43%
Aura Minerals Inc Common Shares (AUGO)	Q1 2019	954.93%
Castellum (CTM)	Q2 2019	833.33%
Quipt Home Medical (QIPT)	Q1 2019	766.25%
Oncolytics Biotech (ONCY)	Q4 2019	698.52%
FuelCell Energy (FCEL)	Q4 2019	684.38%
India Globalization Capital (IGC)	Q1 2019	617.24%
Battalion Oil (BATL)	Q4 2019	572.5%
Americas Silver (USAS)	Q1 2019	525%
Nocera (NCRA)	Q2 2019	474.47%
Pennant (PNTG)	Q4 2019	437.72%
GameSquare (GAME)	Q3 2019	429.41%
Iveda Solutions (IVDA)	Q1 2019	412.82%
Axsome Therapeutics (AXSM)	Q4 2019	410.42%
Axsome Therapeutics (AXSM)	Q1 2019	406.41%