ChipMOS Technologies (IMOS) had the best month in 2010 by a mid-cap US stock in April 2010, returning 152.7%.

ASSET	MONTH	% RETURN
ChipMOS Technologies (IMOS)	April 2010	152.73%
Arrowhead Pharmaceuticals (ARWR)	March 2010	111.11%
Novanta (NOVT)	March 2010	102.04%
Federal Agricultural Mortgage (AGM)	April 2010	96.34%
Sharplink Gaming (SBET)	October 2010	88.32%
First BanCorp (FBP)	December 2010	84%
Vera Therapeutics (VERA)	January 2010	80%
Oruka Therapeutics (ORKA)	March 2010	79.28%
Uranium Energy (UEC)	November 2010	77.22%
Applied Digital (APLD)	December 2010	75%
Energy Fuels (UUUU)	October 2010	69.48%
Riot Platforms (RIOT)	April 2010	69.33%
ACADIA Pharmaceuticals (ACAD)	December 2010	69.01%
Green Brick Partners (GRBK)	September 2010	68.65%
Skeena Resources (SKE)	April 2010	66.67%
Energy Fuels (UUUU)	July 2010	64.89%
Sharplink Gaming (SBET)	February 2010	63.93%
Sellas Life Sciences (SLS)	September 2010	61.93%
Energy Fuels (UUUU)	September 2010	61.26%
Aya Gold & Silver Inc Common Shares (AYA)	November 2010	60%
Radian (RDN)	March 2010	57.98%
Applied Digital (APLD)	February 2010	55.56%
MakeMyTrip (MMYT)	August 2010	54.55%
ChipMOS Technologies (IMOS)	September 2010	54.46%
Casella Waste Systems (CWST)	December 2010	52.8%

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