Soleno Therapeutics (SLNO) had the highest return in Q3 2023 by a mid-cap US stock, returning 604.3%.

ASSET	QUARTER	% RETURN
Soleno Therapeutics (SLNO)	Q3 2023	604.3%
United States Cellular (USM)	Q3 2023	145.12%
Telephone and Data Systems (TDS)	Q3 2023	122.95%
Immunovant (IMVT)	Q3 2023	102.69%
WM Technology (MAPSW)	Q3 2023	98.58%
Camtek (CAMT)	Q3 2023	74.89%
Advantage Solutions (ADVWW)	Q3 2023	68%
Crinetics Pharmaceuticals (CRNX)	Q3 2023	65.31%
Dlocal (DLO)	Q3 2023	58.56%
Alpha Metallurgical Resources (AMR)	Q3 2023	57.31%
Paymentus (PAY)	Q3 2023	56.02%
Consol Energy (CEIX)	Q3 2023	55.95%
Arch Resources (ARCH)	Q3 2023	55.78%
Uranium Energy (UEC)	Q3 2023	54.19%
Miniso Group Holding (MNSO)	Q3 2023	52.47%
BridgeBio Pharma (BBIO)	Q3 2023	51.29%
Abercrombie & Fitch (ANF)	Q3 2023	49.88%
Rush Street Interactive (RSI)	Q3 2023	49.03%
TAL Education (TAL)	Q3 2023	48.86%
New Oriental Education & Technology (EDU)	Q3 2023	46.19%
Capri (CPRI)	Q3 2023	45.61%
HUTCHMED DRC (HCM)	Q3 2023	43.56%
Trupanion (TRUP)	Q3 2023	42.64%
American Eagle Outfitters (AEO)	Q3 2023	41.1%
Amneal Pharmaceuticals, Inc Class A Common Stock (AMRX)	Q3 2023	39.27%

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