best performing mid cap in february 2026

AXT (AXTI) had the highest return in February 2026 by a mid-cap US stock, returning 107.2%.

ASSETMONTH% RETURN
AXT (AXTI)
February 2026
107.16%
Applied Opt (AAOI)
February 2026
100.5%
Nektar Therapeutics (NKTR)
February 2026
84.98%
Acadia Healthcare (ACHC)
February 2026
75.06%
Valaris (VAL)
February 2026
71.47%
Palvella Therapeutics (PVLA)
February 2026
70.31%
Almonty Industries Inc Common Shares (ALM)
February 2026
60.89%
Ichor (ICHR)
February 2026
58.87%
Immunitybio (IBRX)
February 2026
55.48%
Polestar Automotive Holding UK PLC Class A ADS (PSNY)
February 2026
51.27%
NovaGold Resources (NG)
February 2026
51.02%
Aehr Test Systems (AEHR)
February 2026
49.6%
First Majestic Silver (AG)
February 2026
48.25%
Nanobiotix (NBTX)
February 2026
47.88%
Clear Secure (YOU)
February 2026
47.57%
Orla Mining (ORLA)
February 2026
45.79%
Silicon Laboratories (SLAB)
February 2026
45.58%
IPG Photonics (IPGP)
February 2026
44.41%
DHT (DHT)
February 2026
42.01%
Fortuna Silver Mines (FSM)
February 2026
41.55%
SSR Mining (SSRM)
February 2026
41.18%
Ultra Clean (UCTT)
February 2026
41.02%
FormFactor (FORM)
February 2026
41%
Silvercorp Metals (SVM)
February 2026
40.99%
Ringcentral (RNG)
February 2026
40.84%
Mid-cap stocks are treated as having a market cap between $2B and $10B.