Diversified Energy (DEC) had the highest return between 2019 and 2023 by a small-cap US stock, returning 12,413,800%.

ASSET	YEARS	% RETURN
Diversified Energy (DEC)	2019-2023	12,413,800%
Integra Resources (ITRG)	2019-2023	264,900%
Sigma Lithium Resources (SGML)	2019-2023	1,931.57%
Aehr Test Systems (AEHR)	2019-2023	1,768.31%
Fubotv (FUBO)	2019-2023	1,696.61%
Hudson Technologies (HDSN)	2019-2023	1,417.44%
Dorian LPG (LPG)	2019-2023	1,254.73%
Celldex Therapeutics (CLDX)	2019-2023	1,222%
Limbach (LMB)	2019-2023	1,106.1%
Perion Network (PERI)	2019-2023	1,091.89%
LifeMD (LFMD)	2019-2023	1,084.29%
Atlanticus (ATLC)	2019-2023	980.17%
Fulgent Genetics (FLGT)	2019-2023	811.99%
Hovnanian Enterprises (HOV)	2019-2023	810.19%
Xpel (XPEL)	2019-2023	785.69%
Calumet Specialty Products Partners (CLMT)	2019-2023	715.98%
IsoEnergy (ISOU)	2019-2023	692.02%
Danaos (DAC)	2019-2023	687.24%
BW LPG (BWLP)	2019-2023	670.88%
Mama's Creations (MAMA)	2019-2023	661.24%
Aspen Aerogels (ASPN)	2019-2023	640.85%
Lifeway Foods (LWAY)	2019-2023	617.11%
Biohaven Pharmaceutical (BHVN)	2019-2023	613.33%
Okeanis Eco Tankers (ECO)	2019-2023	607.75%
Arcturus Therapeutics (ARCT)	2019-2023	596.03%

Small-cap stocks are treated as having a market cap between $300M and $2B.