Netflix (NFLX) had the highest return between 2013 and 2015 by a US stock in the S&P 500 (GSPC), returning 740.9%.

ASSET	YEARS	% RETURN
Netflix (NFLX)	2013-2015	740.94%
Tesla (TSLA)	2013-2015	585.75%
Incyte (INCY)	2013-2015	548.62%
DexCom (DXCM)	2013-2015	489.63%
Broadcom (AVGO)	2013-2015	370.19%
Electronic Arts (EA)	2013-2015	365.27%
Delta Air Lines (DAL)	2013-2015	329.69%
EPAM Systems (EPAM)	2013-2015	324.51%
Southwest Airlines (LUV)	2013-2015	321.59%
Constellation Brands Inc Class A (STZ)	2013-2015	299.2%
Facebook (META)	2013-2015	281.42%
Skyworks Solutions (SWKS)	2013-2015	271.09%
Tyler Technologies (TYL)	2013-2015	252.87%
Diamondback Energy (FANG)	2013-2015	243.78%
Kroger (KR)	2013-2015	231.48%
Palo Alto Networks (PANW)	2013-2015	223.08%
Interactive Brokers (IBKR)	2013-2015	216.96%
Centene (CNC)	2013-2015	214.73%
Boston Scientific (BSX)	2013-2015	214.68%
NXP Semiconductors (NXPI)	2013-2015	210.89%
Take-Two Interactive Software (TTWO)	2013-2015	210.52%
Regeneron Pharmaceuticals (REGN)	2013-2015	207.71%
Royal Caribbean Cruises (RCL)	2013-2015	206.63%
Huntington Ingalls Industries (HII)	2013-2015	199.36%
Northrop Grumman (NOC)	2013-2015	193.72%