MaxLinear (MXL) had the highest return last month by a mid-cap US stock, returning 302%.

ASSET	MONTH	% RETURN
MaxLinear (MXL)	April 2026	301.99%
Xanadu Quantum Technologies Limited Class B Subordinate Voting Shares (XNDU)	April 2026	270.23%
Aehr Test Systems (AEHR)	April 2026	137.07%
Organon (OGN)	April 2026	121.94%
Silicon Motion Technology (SIMO)	April 2026	91.56%
Navitas Semiconductor (NVTS)	April 2026	83.33%
Maase (MAAS)	April 2026	79.3%
Penguin Solutions (PENG)	April 2026	68.38%
USA Rare Earth (USAR)	April 2026	65.78%
BlackBerry (BB)	April 2026	64.63%
Oscar Health (OSCR)	April 2026	58.45%
Vishay Intertechnology (VSH)	April 2026	58.31%
American Superconductor (AMSC)	April 2026	56.28%
Kailera Therapeutics, Inc Common Stock (KLRA)	April 2026	56.25%
Soleno Therapeutics (SLNO)	April 2026	55.06%
Dave (DAVE)	April 2026	53.04%
Diodes (DIOD)	April 2026	52.94%
Bitfarms (KEEL)	April 2026	52.26%
Veradermics (MANE)	April 2026	51.98%
Allegro Microsystems (ALGM)	April 2026	51.37%
Cohu (COHU)	April 2026	51.04%
Custom Truck One Source (CTOS)	April 2026	48.57%
York Space Systems (YSS)	April 2026	48.17%
Spyre Therapeutics (SYRE)	April 2026	47.94%
Rumble (RUM)	April 2026	47.07%

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