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.
VOO
S&P 500 — managed by Vanguard
IVV
S&P 500 — managed by iShares (BlackRock)
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
Since both funds are chasing the same benchmark with a similar structure, the differences that remain are provider-specific: expense ratio, share price, trading volume, and each fund's own tracking precision against the index. These details can change over time and differ between the two at any given moment — check current figures directly on Vanguard's and iShares' official fund pages before comparing.
An illustrative growth example
Because VOO and IVV track the same index, a growth projection for one is a reasonable proxy for the other. Here's $500 invested every month for 20 years at an assumed 7% annual return — a chosen assumption for illustration, not a prediction of either fund's actual future return.
That scenario projects to $260,463 from $120,000 in contributions — the same figures would apply whether you're thinking about VOO or IVV specifically, since the underlying index exposure is the same.
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.