ITOT vs IVV: how much do they really overlap?
ITOT (iShares Core S&P Total US Stock Market ETF, tracking the S&P Total Market) and IVV (iShares Core S&P 500 ETF, tracking the S&P 500) overlap by roughly 100% by weight. 10 of ITOT's top 10 holdings also appear in IVV. A 50/50 blend of the two behaves like about 60 equally-weighted bets (diversification grade B). In short, the two funds hold nearly the same stocks in nearly the same proportions — owning both is largely redundant.
The same companies, in both funds
These 50 holdings appear in both ITOT and IVV. The weight columns show how much of each fund each name represents.
| Holding | in ITOT | in IVV |
|---|---|---|
| NVDA NVIDIA CORP | 6.63% | 7.51% |
| AAPL APPLE INC | 5.81% | 6.58% |
| MSFT MICROSOFT CORP | 3.79% | 4.29% |
| AMZN AMAZON.COM INC | 3.19% | 3.61% |
| GOOGL ALPHABET INC CLASS A | 2.86% | 3.25% |
| AVGO BROADCOM INC | 2.45% | 2.77% |
| GOOG ALPHABET INC CLASS C | 2.29% | 2.59% |
| MU MICRON TECHNOLOGY INC | 1.78% | 2.02% |
| META META PLATFORMS INC CLASS A | 1.69% | 1.92% |
| TSLA TESLA INC | 1.62% | 1.83% |
| LLY ELI LILLY | 1.30% | 1.47% |
| AMD ADVANCED MICRO DEVICES INC | 1.30% | 1.47% |
| BRKB BERKSHIRE HATHAWAY INC CLASS B | 1.25% | 1.42% |
| JPM JPMORGAN CHASE & CO | 1.20% | 1.36% |
| INTC INTEL CORPORATION | 0.90% | 1.02% |
+ 35 more shared holdings.
Only in ITOT
iShares Core S&P Total US Stock Market ETF — total US market. Its biggest holdings that IVV doesn’t have:
| Every listed ITOT holding is also in IVV. |
Only in IVV
iShares Core S&P 500 ETF — US large-cap. Its biggest holdings that ITOT doesn’t have:
| Every listed IVV holding is also in ITOT. |
So — nearly identical. Should you hold both?
ITOT and IVV hold nearly the same stocks in nearly the same proportions — owning both is largely redundant. If you already hold ITOT, adding IVV mostly increases your bet on the names they share rather than spreading it — a 50/50 blend still behaves like only ~60 equal positions, with the top 10 alone at 34% and the Magnificent Seven at 30%.
Holdings as of — ITOT: Jun 30, 2026 (iShares (BlackRock)); IVV: Jun 30, 2026 (iShares (BlackRock)). Refreshed monthly. Overlap is measured across each fund’s largest holdings (top 50); the diffuse long tail barely moves the math.
See this for YOUR whole portfolio, free →ITOT vs IVV — FAQ
- How much do ITOT and IVV overlap?
- ITOT and IVV overlap by approximately 100% measured by portfolio weight — that is the share of the smaller fund's holdings (by weight) that also sit inside the other. 10 of ITOT's 10 largest holdings are also held by IVV. They share 50 of their listed top holdings in total.
- Is it redundant to hold both ITOT and IVV?
- Because they hold nearly the same stocks in nearly the same proportions — owning both is largely redundant, holding both is largely redundant — you mostly duplicate the same megacaps and concentrate rather than diversify. A 50/50 blend has an effective 60 positions and a B diversification grade.
- What does IVV hold that ITOT doesn't?
- ITOT contains essentially all of IVV's listed holdings.
- Which is more concentrated, ITOT or IVV?
- ITOT's top 10 holdings are 58% of its listed weight; IVV's are 58%. The more concentrated fund leans harder on its largest names.