VOO vs IVV
VOO and IVV both track the S&P 500 index — the difference is mainly about the provider and fund structure, not what each fund holds.
Written by Muhammad Hamza
VOO
S&P 500 — managed by Vanguard
IVV
S&P 500 — managed by iShares (BlackRock)
| VOO | IVV | |
|---|---|---|
| Issuer | Vanguard | BlackRock (iShares) |
| Expense ratio | 0.03% | 0.03% |
| Holdings | ~516 | ~504 |
| Inception | Sep 7, 2010 | May 15, 2000 |
| Dividend frequency | Quarterly | Quarterly |
Sources: each fund's issuer page (Vanguard, State Street/SSGA, Invesco, Charles Schwab, BlackRock/iShares), cross-checked against StockAnalysis.com. Holdings counts are approximate and change daily; expense ratios can change — verify current figures on the issuer's own page before investing.
What they have in common
VOO and IVV both aim to track the S&P 500 index as closely as possible, meaning their underlying holdings — roughly 500 large U.S. companies, in the same index-defined proportions — are effectively identical. Both are also structured as open-end funds, unlike SPY's older unit investment trust (UIT) structure, so the two share more structural similarities with each other than either does with SPY.
| VOO | IVV | |
|---|---|---|
| Provider | Vanguard | iShares (BlackRock) |
| Tracks | S&P 500 Index | S&P 500 Index |
| Structure | Open-end fund | Open-end fund |
| Approximate holdings | ~500 | ~500 |
What's actually different
As of September 28, 2026, VOO and IVV both charge a 0.03% expense ratio — unlike the VOO-vs-SPY comparison, there's no cost gap here to speak of. That makes this the closest of any comparison on this site: same index, same structure, same fee. What's left is share price, trading volume, and each fund's own tracking precision against the index, which can shift slightly over time — check current figures directly on Vanguard's and iShares' official fund pages before comparing.
Because the fee gap is effectively zero, a growth projection for one fund is a reasonable proxy for the other — use the VOO calculator for either.
Which one fits your plan
Given how similar VOO and IVV are, the decision often comes down to which brokerage you use, current cost differences, or simply which one you already hold. Neither is a meaningfully different bet on the market than the other. This page is educational information, not a recommendation to buy either fund.
Since VOO and IVV track the same index, use our VOO calculator as a reasonable proxy to project growth for either fund under your own assumptions.