InterContinental Hotels Group PLC ADR (IHG) had the highest return between 2002 and 2003 by a large-cap US stock, returning 5,813,300%.

ASSET	YEARS	% RETURN
InterContinental Hotels Group PLC ADR (IHG)	2002-2003	5,813,300%
Thomson Reuters Corporation Common Shares (TRI)	2002-2003	25,087.79%
NetEase (NTES)	2002-2003	4,812.07%
Cheniere Energy (LNG)	2002-2003	1,131.55%
Hecla Mining (HL)	2002-2003	821.03%
Coeur Mining (CDE)	2002-2003	588.09%
Axon Enterprise (AXON)	2002-2003	502.55%
ArcelorMittal SA ADR (MT)	2002-2003	392.8%
Amazon (AMZN)	2002-2003	381.16%
Deckers Outdoor (DECK)	2002-2003	363.72%
Tractor Supply (TSCO)	2002-2003	355.38%
Southern Copper (SCCO)	2002-2003	317.87%
Royal Gold (RGLD)	2002-2003	313.7%
Dick’s Sporting Goods (DKS)	2002-2003	297.55%
Tapestry (TPR)	2002-2003	292.01%
ICICI Bank (IBN)	2002-2003	291.8%
Old Dominion Freight Line (ODFL)	2002-2003	283.46%
Rambus (RMBS)	2002-2003	280.42%
Kinross Gold (KGC)	2002-2003	275.12%
Grupo Cibest (CIB)	2002-2003	274.56%
Align Technology (ALGN)	2002-2003	266.89%
Crown (CCK)	2002-2003	255.3%
Pan American Silver (PAAS)	2002-2003	238.87%
Netflix (NFLX)	2002-2003	237.89%
Cognizant Technology Solutions Corp Class A (CTSH)	2002-2003	234.61%

Large-cap stocks are treated as having a market cap of $10B+.