NAYA Biosciences (NAYA) had the highest return in May 2020 by a US stock, returning 1,061.8%.

ASSET	MONTH	% RETURN
NAYA Biosciences (NAYA)	May 2020	1,061.8%
Kartoon Studios (TOON)	May 2020	572.13%
Remark (MARK)	May 2020	373.97%
GreenPro Capital (GRNQ)	May 2020	342.34%
Advent Technologies (ADNWW)	May 2020	275%
Oruka Therapeutics (ORKA)	May 2020	254.93%
Adaptimmune Therapeutics (ADAP)	May 2020	244.86%
Altimmune (ALT)	May 2020	205.26%
Aileron Therapeutics (ALRN)	May 2020	203.37%
Greenwave Technology Solutions Inc Common Stock (GWAV)	May 2020	200%
Akso Health Group ADR (AHG)	May 2020	197.37%
Nano Dimension (NNDM)	May 2020	194.32%
Energy Focu (EFOI)	May 2020	184.38%
Nabors Industries (NBR)	May 2020	168.16%
MacroGenics (MGNX)	May 2020	167.22%
Sphere 3D (ANY)	May 2020	162.07%
CervoMed (CRVO)	May 2020	160%
Mersana Therapeutics (MRSN)	May 2020	159.04%
Novavax (NVAX)	May 2020	158.65%
Reviva Pharmaceuticals (RVPHW)	May 2020	149.88%
Tiziana Life Sciences (TLSA)	May 2020	149.43%
Camping World (CWH)	May 2020	148.59%
Protagonist Therapeutics (PTGX)	May 2020	148.57%
International Tower Hill Mines (THM)	May 2020	145.65%
IZEA (IZEA)	May 2020	144.02%