ASML Holding NV ADR (ASML) had the highest return in March 1995 by a mega-cap US stock, returning 25%.

ASSET	MONTH	% RETURN
ASML Holding NV ADR (ASML)	March 1995	25%
Micron Technology (MU)	March 1995	22.2%
Applied Materials (AMAT)	March 1995	18.55%
Cisco Systems (CSCO)	March 1995	13.81%
Microsoft (MSFT)	March 1995	12.68%
Toyota Motor Corporation ADR (TM)	March 1995	11.73%
Advanced Micro Devices (AMD)	March 1995	11.52%
Lam Research (LRCX)	March 1995	9.83%
Caterpillar (CAT)	March 1995	9.63%
International Business Machines (IBM)	March 1995	9.32%
Costco Wholesale (COST)	March 1995	9.26%
Mitsubishi UFJ Financial Group Inc ADR (MUFG)	March 1995	8.99%
Eli Lilly and (LLY)	March 1995	8.94%
KLA-Tencor (KLAC)	March 1995	8.58%
UnitedHealth (UNH)	March 1995	8.16%
Thermo Fisher Scientific (TMO)	March 1995	7.96%
Shell PLC ADR (SHEL)	March 1995	7.02%
Intel (INTC)	March 1995	6.43%
Raytheon Technologies (RTX)	March 1995	5.13%
Johnson & Johnson (JNJ)	March 1995	5.08%
American Express (AXP)	March 1995	4.49%
Exxon Mobil (XOM)	March 1995	4.31%
AstraZeneca PLC ADR (AZN)	March 1995	3.95%
LIN TV (LIN)	March 1995	3.91%
McDonald’s (MCD)	March 1995	3.41%

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