Axon Enterprise (AXON) had the highest return between 2003 and 2004 by a US stock in the S&P 500 (GSPC), returning 9,277.8%.

ASSET	YEARS	% RETURN
Axon Enterprise (AXON)	2003-2004	9,277.78%
Deckers Outdoor (DECK)	2003-2004	1,319.58%
Williams Companies (WMB)	2003-2004	993.47%
Monster Beverage (MNST)	2003-2004	764.01%
Akamai Technologies (AKAM)	2003-2004	623.89%
CME (CME)	2003-2004	433.49%
Autodesk (ADSK)	2003-2004	428.76%
Wynn Resorts (WYNN)	2003-2004	414.38%
F5 Networks (FFIV)	2003-2004	353.21%
Apple (AAPL)	2003-2004	348.61%
AES (AES)	2003-2004	346.74%
VeriSign (VRSN)	2003-2004	307.27%
Trimble (TRMB)	2003-2004	304.56%
Juniper Networks (JNPR)	2003-2004	289.54%
Align Technology (ALGN)	2003-2004	264.41%
DR Horton (DHI)	2003-2004	252.27%
Cognizant Technology Solutions Corp Class A (CTSH)	2003-2004	249.36%
Texas Pacific Land Trust (TPL)	2003-2004	246.85%
Corning (GLW)	2003-2004	243.16%
eBay (EBAY)	2003-2004	241.12%
Advanced Micro Devices (AMD)	2003-2004	235.67%
Tapestry (TPR)	2003-2004	235.32%
Royal Caribbean Cruises (RCL)	2003-2004	231.6%
NetApp (NTAP)	2003-2004	227.94%
Intuitive Surgical (ISRG)	2003-2004	225.38%