Booking (BKNG) had the highest return between 1998 and 2003 by a large-cap US stock, returning 5,857,133.3%.

ASSET	YEARS	% RETURN
Booking (BKNG)	1998-2003	5,857,133.33%
AngloGold Ashanti (AU)	1998-2003	156,216.59%
Ovintiv (OVV)	1998-2003	5,758.49%
Cognizant Technology Solutions Corp Class A (CTSH)	1998-2003	2,637.87%
NVR (NVR)	1998-2003	2,030.29%
eBay (EBAY)	1998-2003	1,349.15%
Tractor Supply (TSCO)	1998-2003	994.07%
Amazon (AMZN)	1998-2003	952.4%
Quest Diagnostics (DGX)	1998-2003	766.49%
Qualcomm (QCOM)	1998-2003	766.18%
Best Buy (BBY)	1998-2003	752.97%
Laboratory Corporation of America (LH)	1998-2003	744.74%
Ryanair Holdings PLC ADR (RYAAY)	1998-2003	710.53%
Tapestry (TPR)	1998-2003	655%
Neurocrine Biosciences (NBIX)	1998-2003	581.75%
Biogen (BIIB)	1998-2003	540.58%
Genesis Healthcare (GEN)	1998-2003	523.7%
Gilead Sciences (GILD)	1998-2003	509.43%
Chunghwa Telecom (CHT)	1998-2003	501.4%
Johnson Controls International (JCI)	1998-2003	498.21%
ResMed (RMD)	1998-2003	488.21%
Copart (CPRT)	1998-2003	477.78%
Logitech International (LOGI)	1998-2003	471.86%
Take-Two Interactive Software (TTWO)	1998-2003	462.35%
East West Bancorp (EWBC)	1998-2003	460.84%

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