Innodata (INOD) had the highest return in Q1 2023 by a mid-cap US stock, returning 177.3%.

ASSET	QUARTER	% RETURN
Innodata (INOD)	Q1 2023	177.27%
Oscar Health (OSCR)	Q1 2023	161.6%
Kingsoft Cloud Holdings (KC)	Q1 2023	123.37%
Bitfarms (KEEL)	Q1 2023	122.48%
Sotera Health (SHC)	Q1 2023	112.2%
Protagonist Therapeutics (PTGX)	Q1 2023	108.71%
Immunome (IMNM)	Q1 2023	107.92%
Dianthus Therapeutics (DNTH)	Q1 2023	104.82%
Navitas Semiconductor (NVTS)	Q1 2023	103.62%
Duolingo (DUOL)	Q1 2023	100.46%
Aurinia Pharmaceuticals (AUPH)	Q1 2023	94.33%
Blue Bird (BLBD)	Q1 2023	88.47%
Ocular Therapeutix (OCUL)	Q1 2023	83.62%
Eos Energy Enterprises (EOSE)	Q1 2023	83.57%
Viking Therapeutics (VKTX)	Q1 2023	81.18%
Cinemark (CNK)	Q1 2023	68.64%
Axcelis Technologies (ACLS)	Q1 2023	65.16%
Miniso Group Holding (MNSO)	Q1 2023	61.27%
Lantheus (LNTH)	Q1 2023	60.47%
Structure Therapeutics Inc American Depositary Shares (GPCR)	Q1 2023	58.6%
SoundHound AI (SOUN)	Q1 2023	57.71%
Cimpress (CMPR)	Q1 2023	55.33%
Equinox Gold (EQX)	Q1 2023	53.73%
Perpetua Resources (PPTA)	Q1 2023	52.92%
Hims Hers Health (HIMS)	Q1 2023	52.62%

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