Amerant Bancorp (AMTB) had the highest return in Q4 2018 by a US stock, returning 6,147,300%.

ASSET	QUARTER	% RETURN
Amerant Bancorp (AMTB)	Q4 2018	6,147,300%
Immatics (IMTX)	Q4 2018	195,900%
Reliance Global (RELI)	Q4 2018	548.14%
Iveda Solutions (IVDA)	Q4 2018	294.74%
vTv Therapeutics (VTVT)	Q4 2018	231.25%
Serina Therapeutics (SER)	Q4 2018	164.6%
OFS Credit (OCCI)	Q4 2018	162.03%
Energy of Minas Gerais Co DRC (CIG.C)	Q4 2018	144.93%
Nocera (NCRA)	Q4 2018	135.29%
Gravity (GRVY)	Q4 2018	134.36%
American Battery Technology Company Common Stock (ABAT)	Q4 2018	113.79%
Companhia Energetica de Minas Gerais CEMIG Pref ADR (CIG)	Q4 2018	106.23%
Harrow Health (HROW)	Q4 2018	104.68%
SS Innovations International Inc Common Stock (SSII)	Q4 2018	99.33%
Adial Pharmaceuticals (ADIL)	Q4 2018	85.51%
Inuvo (INUV)	Q4 2018	78.33%
Twist Bioscience (TWST)	Q4 2018	77.62%
Astrotech (ASTC)	Q4 2018	74.09%
Daxor (DXR)	Q4 2018	73.36%
COSCIENS Biopharma (CSCI)	Q4 2018	70.93%
MOGU (MOGU)	Q4 2018	70.75%
Fluent (FLNT)	Q4 2018	67.44%
Marin Software (MRIN)	Q4 2018	66.98%
Centrais Electricas Brasileiras (EBR)	Q4 2018	61.58%
Windtree Therapeutics (WINT)	Q4 2018	60.26%