AMC Entertainment (AMC) had the highest return in May 2021 by a US stock with a market cap of $1B+, returning 158.4%.

ASSET	MONTH	% RETURN
AMC Entertainment (AMC)	May 2021	158.36%
Diversified Energy (DEC)	May 2021	87.72%
Tecnoglass (TGLS)	May 2021	87.31%
Peabody Energy (BTU)	May 2021	71.76%
Alpha Metallurgical Resources (AMR)	May 2021	62.79%
Eos Energy Enterprises (EOSE)	May 2021	53.87%
Vera Therapeutics (VERA)	May 2021	51.18%
Hecla Mining (HL)	May 2021	48.46%
Grupo Simec SAB de CV ADR (SIM)	May 2021	44.71%
Antero Resources (AR)	May 2021	41.87%
Orla Mining (ORLA)	May 2021	41.74%
Garrett Motion (GTX)	May 2021	41.48%
Brightstar Lottery (BRSL)	May 2021	39.75%
Ramaco Resources (METC)	May 2021	39.22%
Endeavour Silver (EXK)	May 2021	36.76%
Coca-Cola Consolidated (COKE)	May 2021	36.58%
Global-E Online (GLBE)	May 2021	35.51%
BioCryst Pharmaceuticals (BCRX)	May 2021	34.67%
Vista Oil Gas ADR (VIST)	May 2021	34.59%
Upstart Holdings (UPST)	May 2021	33.39%
Dillard's (DDS)	May 2021	32.33%
Vizsla Resources (VZLA)	May 2021	31.82%
Legend Biotech (LEGN)	May 2021	31.67%
ThredUp (TDUP)	May 2021	31.49%
Cricut (CRCT)	May 2021	31.4%