ASML Holding NV ADR (ASML) has had the highest return this month by a mega-cap US stock, returning 5.5%.

ASSET	MONTH	% RETURN
ASML Holding NV ADR (ASML)	January 2025	5.48%
Taiwan Semiconductor Manufacturing (TSM)	January 2025	5.14%
Thermo Fisher Scientific (TMO)	January 2025	4.96%
Bank of America (BAC)	January 2025	4.69%
Facebook (META)	January 2025	3.56%
SAP SE ADR (SAP)	January 2025	3.32%
Chevron (CVX)	January 2025	3.32%
UnitedHealth (UNH)	January 2025	3.25%
NVIDIA (NVDA)	January 2025	3.02%
Shell PLC ADR (SHEL)	January 2025	2.76%
Alphabet Inc Class C (GOOG)	January 2025	2.04%
Walmart (WMT)	January 2025	2.02%
Alphabet Inc Class A (GOOGL)	January 2025	1.73%
Wells Fargo (WFC)	January 2025	1.55%
JPMorgan Chase (JPM)	January 2025	1.44%
Costco Wholesale (COST)	January 2025	1.35%
Accenture (ACN)	January 2025	1.31%
Tesla (TSLA)	January 2025	1.24%
American Express (AXP)	January 2025	1.19%
Morgan Stanley (MS)	January 2025	1.07%
AstraZeneca PLC ADR (AZN)	January 2025	0.86%
Eli Lilly and (LLY)	January 2025	0.85%
International Business Machines (IBM)	January 2025	0.61%
Cisco Systems (CSCO)	January 2025	0.56%
Blackstone (BX)	January 2025	0.49%

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