Hyliion (HYLN) had the highest return on May 22 by a small-cap US stock, returning 39.6%.

ASSET	DATE	% RETURN
Hyliion (HYLN)	5/22/2026	39.63%
SharonAI Holdings, Inc Class A Common Stock (SHAZ)	5/22/2026	16.54%
Virgin Galactic (SPCE)	5/22/2026	15.71%
Aeva Technologies, Inc Common Stock (AEVA)	5/22/2026	15.09%
Xerox (XRX)	5/22/2026	15.08%
LightPath Technologies (LPTH)	5/22/2026	14.84%
indie Semiconductor (INDI)	5/22/2026	14.52%
Unusual Machines (UMAC)	5/22/2026	13.07%
Frequency Electronics (FEIM)	5/22/2026	12.92%
Cerence (CRNC)	5/22/2026	12.5%
BTQ Technologies Corp Common Stock (BTQ)	5/22/2026	12.17%
Citi Trends (CTRN)	5/22/2026	10.68%
Indaptus Therapeutics (INDP)	5/22/2026	9.91%
High Templar Tech Limited Sponsored ADR Class A (HTT)	5/22/2026	9.91%
Phoenix Asia Holdings Limited Ordinary Shares (PHOE)	5/22/2026	9.04%
Up Fintech (TIGR)	5/22/2026	8.86%
Terrestrial Energy (IMSR)	5/22/2026	8.86%
Corsair Gaming (CRSR)	5/22/2026	8.83%
Mayville Engineering (MEC)	5/22/2026	8.71%
Satellogic V (SATL)	5/22/2026	8.6%
Genius Sports (GENI)	5/22/2026	8.52%
Zhong Yang Financial Group Limited Ordinary Shares (TOP)	5/22/2026	8.49%
Vishay Precision (VPG)	5/22/2026	8.46%
Vital Farms (VITL)	5/22/2026	8.11%
Intuitive Machines (LUNR)	5/22/2026	8.08%

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