Inari Medical (NARI) has had the highest return this month by a mid-cap US stock, returning 54.4%.

ASSET	MONTH	% RETURN
Inari Medical (NARI)	January 2025	54.44%
Polestar Automotive Holding UK PLC Class C-1 ADS (ADW) (PSNYW)	January 2025	49.93%
WM Technology (MAPSW)	January 2025	40.09%
Plug Power (PLUG)	January 2025	31.05%
Unifirst (UNF)	January 2025	27.35%
MP Materials (MP)	January 2025	24.61%
BBVA Banco Frances SA ADR (BBAR)	January 2025	20.47%
Equinox Gold (EQX)	January 2025	18.91%
Oklo (OKLO)	January 2025	18.89%
Paycor HCM (PYCR)	January 2025	18.58%
SpringWorks Therapeutics (SWTX)	January 2025	18.39%
Frontline (FRO)	January 2025	18.09%
Guardant Health (GH)	January 2025	17.46%
Banco Macro SA B ADR (BMA)	January 2025	17.12%
GeneDx (WGS)	January 2025	16.37%
Argan (AGX)	January 2025	15.07%
Riot Blockchain (RIOT)	January 2025	14.39%
GDS (GDS)	January 2025	13.49%
Nextracker Inc Class A Common Stock (NXT)	January 2025	13.03%
Onto Innovation (ONTO)	January 2025	12.85%
Acadia Healthcare (ACHC)	January 2025	12.58%
Kratos Defense & Security Solutions (KTOS)	January 2025	11.38%
Capri (CPRI)	January 2025	11.31%
VEON (VEON)	January 2025	11.25%
International Seaways (INSW)	January 2025	11.15%

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