Data as of Sep 12, 2026. Both funds on the fields they both publish, from the same sources.
ITOT vs SPY: how they differ
ITOT and SPY hold 88% of their weight in the same names.
iShares Core S&P Total U.S. Stock Market ETF and SPDR S&P 500 ETF Trust.
What they hold in common
By the books each fund has filed, ITOT and SPY hold 88% of their money in the same securities at the same weight.
| Holding | ITOT | SPY |
|---|---|---|
| NVIDIA Corp. | 6.64% | 7.52% |
| Apple, Inc. | 5.82% | 6.59% |
| Microsoft Corp. | 3.80% | 4.30% |
| Amazon.com, Inc. | 3.20% | 3.62% |
| Alphabet, Inc. | 2.87% | 3.25% |
| Broadcom, Inc. | 2.45% | 2.77% |
| Alphabet, Inc. | 2.29% | 2.59% |
| Micron Technology, Inc. | 1.78% | 2.02% |
| Meta Platforms, Inc. | 1.70% | 1.92% |
| Tesla, Inc. | 1.62% | 1.84% |
| Eli Lilly & Co. | 1.30% | 1.47% |
| Advanced Micro Devices, Inc. | 1.30% | 1.47% |
| Only in ITOT | Only in SPY |
|---|---|
| Space Exploration Technologies Corp. 0.14% | |
| Snowflake, Inc. 0.12% | |
| Bloom Energy Corp. 0.11% | |
| Cloudflare, Inc. 0.11% | |
| Astera Labs, Inc. 0.09% | |
| Rocket Lab Corp. 0.07% | |
| Cheniere Energy, Inc. 0.07% | |
| Ferguson Enterprises, Inc. 0.06% |
Weight overlap is an ETFIQ calculation: for every security both funds hold, the smaller of the two weights, summed. Above 50%, holding both is close to holding one of them twice. Holdings dated Jun 30, 2026.
| ITOT iShares Core S&P Total U.S. Stock Market ETF | SPY SPDR S&P 500 ETF Trust | |
|---|---|---|
| Where it sits | Core index fund | Core index fund |
| Issuer | iShares | State Street |
| What it is | Core S&P Total U.S. Stock Market | S&P 500, book from IVV |
| Total return, 1 year | +17.2% | +17.5% |
| S&P 500 over the same days | +17.5% | +17.5% |
| Gap to the S&P 500 | −0.3 pts | 0.0 pts |
| Expense ratio | 0.03% | 0.09% |
| Already in the S&P 500 | 88.3% | 100.0% |
| Holdings | 2497 | 504 |
ITOT in plain words
ITOT is an index equity fund tracking the Core S&P Total U.S. Stock Market. Over the year to Sep 11, 2026 it returned +17.2% with distributions reinvested, against +17.5% for the S&P 500 and +23.0% for the Nasdaq-100. The prospectus expense ratio is 0.03% a year. By its holdings filed for Jun 30, 2026, 88% of the fund by weight is stocks the S&P 500 also holds, across 2497 positions, with the top ten at 32.2%.
SPY in plain words
SPY is an index equity fund tracking the S&P 500. Over the year to Sep 11, 2026 it returned +17.5% with distributions reinvested, against +17.5% for the S&P 500 and +23.0% for the Nasdaq-100. The prospectus expense ratio is 0.09% a year. By its holdings filed for Jun 30, 2026, 100% of the fund by weight is stocks the S&P 500 also holds, across 504 positions, with the top ten at 36.4%.
Questions people ask
- Which returned more over the last year, ITOT or SPY?
- In the year to Sep 12, 2026, with distributions reinvested, ITOT returned +17.2% and SPY returned +17.5%, so SPY returned more. One year is one year; the longer windows are in the table.
- Which is cheaper, ITOT or SPY?
- ITOT charges 0.03% a year and SPY charges 0.09%, so ITOT is cheaper. Fees come from each fund's prospectus.
- How much do ITOT and SPY overlap with the S&P 500?
- By their latest filed holdings, 88% of ITOT and 100% of SPY by weight is stocks the S&P 500 already holds. Between the two funds, 88% of their books are the same securities at the same weight.
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Where these figures came from
ETFIQ links to the documents behind every figure. It is not affiliated with any issuer, and a link is not an endorsement.
Cite this page. ETFIQ, ITOT against SPY, data as of Sep 12, 2026. https://etfiq.com/compare/any/ITOT-SPY Free to use with attribution; the underlying files are at Open data.
A comparison is not a recommendation. Standards and sources