Oracle (ORCL) had the highest return between 1993 and 1996 by a mega-cap US stock, returning 565.1%.

ASSET	YEARS	% RETURN
Oracle (ORCL)	1993-1996	565.14%
Cisco Systems (CSCO)	1993-1996	546.38%
Shell PLC ADR (SHEL)	1993-1996	290.41%
Microsoft (MSFT)	1993-1996	288.81%
International Business Machines (IBM)	1993-1996	214.18%
AstraZeneca PLC ADR (AZN)	1993-1996	209.47%
Raytheon Technologies (RTX)	1993-1996	205.56%
LIN TV (LIN)	1993-1996	191.92%
Berkshire Hathaway (BRK.A)	1993-1996	190.83%
American Express (AXP)	1993-1996	186.5%
Eli Lilly and (LLY)	1993-1996	177.52%
JPMorgan Chase (JPM)	1993-1996	176.17%
Coca-Cola (KO)	1993-1996	166.36%
GE Aerospace (GE)	1993-1996	156.84%
Toyota Motor Corporation ADR (TM)	1993-1996	153.98%
Morgan Stanley (MS)	1993-1996	131.38%
Wells Fargo (WFC)	1993-1996	126.21%
ASML Holding NV ADR (ASML)	1993-1996	121.39%
Novo Nordisk A-S (NVO)	1993-1996	118.39%
Chevron (CVX)	1993-1996	118.24%
Procter & Gamble (PG)	1993-1996	117.99%
Bank of America (BAC)	1993-1996	116.37%
Johnson & Johnson (JNJ)	1993-1996	115%
Merck (MRK)	1993-1996	102.95%
McDonald’s (MCD)	1993-1996	91.17%

Mega-cap stocks are treated as having a market cap of $200B+.