BigBearai (BBAI) had the highest return in January 2023 by a mid-cap US stock, returning 356.7%.

ASSET	MONTH	% RETURN
BigBearai (BBAI)	January 2023	356.7%
Qilian International (BGM)	January 2023	144.32%
Hut 8 Corp Common Stock (HUT)	January 2023	126.21%
Cipher Mining (CIFR)	January 2023	107.61%
Sotera Health (SHC)	January 2023	104.27%
Opendoor Technologies (OPEN)	January 2023	85.59%
Sharplink Gaming (SBET)	January 2023	80%
Riot Blockchain (RIOT)	January 2023	79.66%
Arlington Asset Investment (AI)	January 2023	73.67%
Compass (COMP)	January 2023	71.06%
Lucid (LCID)	January 2023	67.72%
Rumble (RUM)	January 2023	65.57%
Applied Digital (APLD)	January 2023	64.02%
WM Technology (MAPSW)	January 2023	63.64%
Peloton Interactive (PTON)	January 2023	58.26%
GeneDx (WGS)	January 2023	57.41%
American Bitcoin (ABTC)	January 2023	57.14%
Oscar Health (OSCR)	January 2023	53.6%
Life Time (LTH)	January 2023	53.51%
Genius Sports (GENI)	January 2023	52.5%
Advantage Solutions (ADVWW)	January 2023	51.96%
CleanSpark (CLSK)	January 2023	50.95%
Lufax (LU)	January 2023	50.25%
Transocean (RIG)	January 2023	49.78%
Atour Lifestyle Holdings Limited American Depositary Shares (ATAT)	January 2023	48.54%

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