Archer Aviation (ACHR) had the highest return on July 31, 2023 by a mid-cap US stock, returning 27.5%.

ASSET	DATE	% RETURN
Archer Aviation (ACHR)	7/31/2023	27.46%
Empire State Realty OP LP 250 (FISK)	7/31/2023	16.97%
Peloton Interactive (PTON)	7/31/2023	11.61%
Vera Therapeutics (VERA)	7/31/2023	8.5%
Joby Aviation (JOBY)	7/31/2023	7.96%
Alignment Healthcare LLC (ALHC)	7/31/2023	7.81%
Uranium Energy (UEC)	7/31/2023	7.78%
Nextnav Acquisition (NN)	7/31/2023	7.36%
Wave Life Sciences (WVE)	7/31/2023	6.59%
PureCycle Technologies (PCTTW)	7/31/2023	6.53%
Recursion Pharmaceuticals (RXRX)	7/31/2023	6.41%
Moog (MOG.A)	7/31/2023	6.07%
Nuscale Power (SMR)	7/31/2023	6.01%
Sprint Communications (S)	7/31/2023	5.84%
Fluence Energy (FLNC)	7/31/2023	5.83%
Frontier Communications Parent (FYBR)	7/31/2023	5.75%
ACV Auctions (ACVA)	7/31/2023	5.68%
Chart Industries (GTLS)	7/31/2023	5.36%
Lemonade (LMND)	7/31/2023	5.25%
Freshworks (FRSH)	7/31/2023	5.07%
Seadrill (SDRL)	7/31/2023	5%
Arlington Asset Investment (AI)	7/31/2023	5%
HealthEquity (HQY)	7/31/2023	4.78%
Trupanion (TRUP)	7/31/2023	4.72%
United Parks & Resorts (PRKS)	7/31/2023	4.69%

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