Amerant Bancorp (AMTB) had the highest return in Q4 2018 by a US stock, returning 6,120,300%.

ASSET	QUARTER	% RETURN
Amerant Bancorp (AMTB)	Q4 2018	6,120,300%
Immatics (IMTX)	Q4 2018	195,900%
Osisko Development (ODV)	Q4 2018	900%
Castellum (CTM)	Q4 2018	827.27%
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%
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	105.77%
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%
MOGU (MOGU)	Q4 2018	70.75%
Fluent (FLNT)	Q4 2018	67.44%
Centrais Electricas Brasileiras (EBR)	Q4 2018	61.58%
Centrais Elétricas Brasileiras SA - Eletrobrás (EBR.B)	Q4 2018	59.55%
American Superconductor (AMSC)	Q4 2018	59.29%