Axon Enterprise (AXON) had the highest return between 2003 and 2004 by a large-cap US stock, returning 9,277.8%.

ASSET	YEARS	% RETURN
Axon Enterprise (AXON)	2003-2004	9,277.78%
Cheniere Energy (LNG)	2003-2004	4,800.21%
ArcelorMittal SA ADR (MT)	2003-2004	1,656.89%
Deckers Outdoor (DECK)	2003-2004	1,319.58%
Williams Companies (WMB)	2003-2004	996.35%
U-Haul (UHAL)	2003-2004	921.78%
Chunghwa Telecom (CHT)	2003-2004	845.27%
Monster Beverage (MNST)	2003-2004	764.01%
Akamai Technologies (AKAM)	2003-2004	623.89%
Grupo Cibest (CIB)	2003-2004	568.75%
CME (CME)	2003-2004	433.5%
Autodesk (ADSK)	2003-2004	433.09%
WESCO International (WCC)	2003-2004	430.24%
Wynn Resorts (WYNN)	2003-2004	414.37%
Insmed (INSM)	2003-2004	399.77%
Carpenter Technology (CRS)	2003-2004	380.35%
Vale SA ADR (VALE)	2003-2004	358.81%
YPF Sociedad Anonima (YPF)	2003-2004	357.15%
F5 Networks (FFIV)	2003-2004	353.21%
NetEase (NTES)	2003-2004	351.9%
Apple (AAPL)	2003-2004	348.54%
Cameco (CCJ)	2003-2004	347.89%
Telefonaktiebolaget LM Ericsson B ADR (ERIC)	2003-2004	331.94%
Teck Resources Ltd Class B (TECK)	2003-2004	328.45%
Ambev SA ADR (ABEV)	2003-2004	319.4%

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