Weatherford International (WFRD) had the highest return between 2018 and 2023 by a mid-cap US stock, returning 3,691,538.5%.

ASSET	YEARS	% RETURN
Weatherford International (WFRD)	2018-2023	3,691,538.46%
Applied Digital (APLD)	2018-2023	112,233.33%
Enphase Energy (ENPH)	2018-2023	5,428.87%
Xenon Pharmaceuticals (XENE)	2018-2023	1,545%
Axsome Therapeutics (AXSM)	2018-2023	1,308.67%
Centrus Energy (LEU)	2018-2023	1,270.53%
Freedom (FRHC)	2018-2023	1,189.6%
Camtek (CAMT)	2018-2023	1,147.47%
Krystal Biotech (KRYS)	2018-2023	1,140.6%
Lattice Semiconductor (LSCC)	2018-2023	1,093.6%
Acm Research (ACMR)	2018-2023	1,016.57%
Cytokinetics (CYTK)	2018-2023	924.42%
Trump Media & Technology (DJTWW)	2018-2023	843.46%
Sitime (SITM)	2018-2023	839.08%
Chord Energy (CHRD)	2018-2023	792.56%
Inspire Medical Systems (INSP)	2018-2023	730.67%
Arrowhead Pharmaceuticals (ARWR)	2018-2023	729.27%
Wingstop (WING)	2018-2023	713.17%
Dillard's (DDS)	2018-2023	700.16%
SPS Commerce (SPSC)	2018-2023	696.22%
Atkore International (ATKR)	2018-2023	644.19%
Calix (CALX)	2018-2023	640.51%
Crocs (CROX)	2018-2023	639%
Tecnoglass (TGLS)	2018-2023	632.99%
Agilysys (AGYS)	2018-2023	587.36%

Mid-cap stocks are treated as having a market cap between $2B and $10B.