Vanguard S&P 500 ETF (VOO)

VOO is the largest ETF in the world by AUM at $1.1T, reflecting Jack Bogle's passive investing legacy. Its 0.03% expense ratio matches #2 IVV, but VOO's $260B in net inflows over the past decade exceeds #1 SPY by 40%. Ideal for long-term retail investors, VOO delivered a 13.5% annualized return since 2010 versus 12.8% for the typical large-cap fund.