RadNet (RDNT) had the highest return between 2006 and 2007 by a US stock with a market cap of $2B+, returning 1,537.1%.

ASSET	YEARS	% RETURN
RadNet (RDNT)	2006-2007	1,537.1%
First Solar (FSLR)	2006-2007	990.37%
Riot Blockchain (RIOT)	2006-2007	772%
CF Industries (CF)	2006-2007	626.22%
Mosaic (MOS)	2006-2007	544.4%
Argan (AGX)	2006-2007	535.73%
Baidu (BIDU)	2006-2007	506.69%
NeoGenomics (NEO)	2006-2007	468.42%
Deckers Outdoor (DECK)	2006-2007	444.25%
Mastercard (MA)	2006-2007	436.89%
Intercontinental Exchange (ICE)	2006-2007	427.4%
Booking (BKNG)	2006-2007	414.6%
BlackBerry (BB)	2006-2007	410.81%
Millicom International Cellular (TIGO)	2006-2007	328.25%
Cogent Communications (CCOI)	2006-2007	322.63%
Illumina (ILMN)	2006-2007	315.86%
AGCO (AGCO)	2006-2007	305.85%
Trip Group Ltd ADR (TCOM)	2006-2007	296.16%
ICL Israel Chemicals (ICL)	2006-2007	292.52%
Halozyme Therapeutics (HALO)	2006-2007	290.66%
GameStop (GME)	2006-2007	290.38%
Cal-Maine Foods (CALM)	2006-2007	288.07%
Southern Copper (SCCO)	2006-2007	277.41%
Hudbay Minerals (HBM)	2006-2007	277.35%
New Oriental Education & Technology (EDU)	2006-2007	266.32%