Liberty Global PLC Class B (LBTYB) had the highest return on May 26 by a mid-cap US stock, returning 14.6%.

ASSET	DATE	% RETURN
Liberty Global PLC Class B (LBTYB)	5/26/2026	14.62%
Redwire (RDW)	5/26/2026	12.19%
Aehr Test Systems (AEHR)	5/26/2026	11.03%
Firefly Aerospace Inc Common Stock (FLY)	5/26/2026	10.36%
Rumble (RUM)	5/26/2026	8.66%
Acm Research (ACMR)	5/26/2026	8.6%
Primoris Services (PRIM)	5/26/2026	8.48%
USA Rare Earth (USAR)	5/26/2026	8.11%
Dave (DAVE)	5/26/2026	7.83%
Alpha Metallurgical Resources (AMR)	5/26/2026	7.73%
Grupo Aval (AVAL)	5/26/2026	7.62%
Scholar Rock (SRRK)	5/26/2026	7.02%
CECO Environmental (CECO)	5/26/2026	6.92%
Warrior Met Coal (HCC)	5/26/2026	6.73%
Ouster, Inc Common Stock (OUST)	5/26/2026	6.32%
BBVA Banco Frances SA ADR (BBAR)	5/26/2026	6.32%
Twist Bioscience (TWST)	5/26/2026	6.27%
Parsons (PSN)	5/26/2026	6.24%
Allegro Microsystems (ALGM)	5/26/2026	6.19%
Lumen Technologies, Inc Common Stock (LUMN)	5/26/2026	6.16%
Power Integrations (POWI)	5/26/2026	6.12%
Fermi (FRMI)	5/26/2026	5.67%
Upstart Holdings (UPST)	5/26/2026	5.62%
Viavi Solutions (VIAV)	5/26/2026	5.47%
JOYY (JOYY)	5/26/2026	5.29%

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