Butterfly Network (BFLY) has had the highest return this month by a mid-cap US stock, returning 100.2%.

ASSET	MONTH	% RETURN
Butterfly Network (BFLY)	June 2026	100.23%
Definium Therapeutics (DFTX)	June 2026	86.82%
Newell Brands (NWL)	June 2026	70.67%
Uniqure (QURE)	June 2026	70.16%
Victoria's Secret (VSXY)	June 2026	69.35%
MBX Biosciences, Inc Common Stock (MBX)	June 2026	66.86%
Apogee Therapeutics, Inc Common Stock (APGE)	June 2026	65.44%
Oruka Therapeutics (ORKA)	June 2026	57.48%
Victoria's Secret (VSCO)	June 2026	56.87%
Alignment Healthcare LLC (ALHC)	June 2026	51.97%
Twist Bioscience (TWST)	June 2026	49.3%
TG Therapeutics (TGTX)	June 2026	48.68%
Sezzle (SEZL)	June 2026	45.27%
Kardigan, Inc Common Stock (KARD)	June 2026	45.23%
Tango Therapeutics (TNGX)	June 2026	44.62%
Enova International (ENVA)	June 2026	44.29%
Ultra Clean (UCTT)	June 2026	43.29%
Biohaven (BHVN)	June 2026	42.74%
Vericel Corp Ord (VCEL)	June 2026	40.39%
Adaptive Biotechnologies (ADPT)	June 2026	39.83%
Glaukos (GKOS)	June 2026	39.52%
Compass (COMP)	June 2026	38.86%
Fermi (FRMI)	June 2026	38.24%
Hinge Health (HNGE)	June 2026	37.7%
Precigen (PGEN)	June 2026	36.92%

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