IVV vs SPLG vs SPY vs VOO: Which Is the Better Pick in 2026?

Overview

These four ETFs all track the S&P 500 Index and hold nearly identical portfolios of 500 large-cap U.S. stocks. The practical differences come down to scale, age, fees, and yield — all are core index trackers, but they compete on expense ratios (ranging from 0.02% to 0.10%), AUM (from $97.3B to $1033B), and distribution rates (1.02% to 1.18%). For most investors, the choice is a matter of cents on the dollar in annual cost.

How they differ

The sharpest distinction is cost: SPLG charges 0.02%, the lowest of the four, while SPY charges 0.10%, making it five times more expensive. VOO and IVV both sit at 0.03%, splitting the middle ground. All four deliver the same underlying index exposure with beta of 1.0, so the expense ratio directly translates to annual return drag. VOO is the largest by AUM at $1033B, followed closely by IVV at $833B; SPLG has the smallest pool at $97.3B. Distribution rates cluster tightly (1.02% to 1.18%), reflecting identical portfolio composition; SPY yields the least at 1.02% while SPLG yields the most at 1.18%, a difference driven by cash drag and fee mechanics rather than fundamentally different income generation. SPY is the oldest fund, dating to January 1993, while VOO is the youngest at September 2010.

Who each is best for

IVV: Fits investors seeking S&P 500 exposure through iShares' ecosystem, particularly those who value the combination of a tiny 0.03% expense ratio and deep, long-standing AUM of $833B without the 0.10% fee of SPY.

SPLG: Designed for cost-conscious core-equity investors who prioritize the absolute lowest expense ratio at 0.02% and are comfortable with the smallest AUM among the four.

SPY: Suits investors who value being an early adopter with the most established track record dating to 1993 and whose trading patterns justify the higher 0.10% fee through frequent rebalancing or tactical moves.

VOO: Matches investors in Vanguard's ecosystem or those drawn to the fund's scale (the largest of the four at $1033B), who value Vanguard's ownership structure and are comfortable with a 0.03% fee that aligns with IVV.

Key risks to know

• Fee drag at multi-decade horizons: A 0.08% annual difference between SPLG (0.02%) and SPY (0.10%) compounds to roughly 1.5–2% in foregone capital over 25 years, assuming identical returns. The gap between SPY and the 0.03% funds is material over a 40-year holding period.

• Concentration in mega-cap drawdowns: All four are equally exposed to the S&P 500's tech and mega-cap tilt; a severe pullback in the largest components or a rotation out of large-cap growth will hit all of them identically, offering no diversification across this group.

• Low liquidity differential for small traders: While SPY trades the highest volume, the spreads among all four are negligible for most retail trades; investors moving less than $50,000 will see negligible slippage, so the liquidity advantage doesn't offset the higher fee for buy-and-hold allocations.

Bottom line

If cost is your primary lever—and over a lifetime it often is—SPLG's 0.02% expense ratio stands out; if you're indifferent between 0.02% and 0.03%, either SPLG, IVV, or VOO delivers nearly identical outcomes. SPY's 0.10% fee represents a meaningful annual drag unless your trading activity is frequent enough to justify that expense. All four hold the same stocks and will move in lockstep, so your choice boils down to issuer preference, existing account relationships, and the explicit math of fees over your holding period. Past performance does not predict future results.