ETF comparison
ITOT vs SPY
US Total Market vs US Large Cap.
iShares Core S&P Total U.S. Stock Market ETF · State Street SPDR S&P 500 ETF Trust
Holdings overlap
473 positions appear in both funds. Buying equal dollars of ITOT and SPY would leave roughly 83.2% of each dollar exposed to the same underlying securities.
Unmatched is the part of a fund's weight the other fund doesn't match: names only it holds, plus any extra weight it puts in names both funds hold.
Side by side
Sub-score comparison
Tracking quality isn't part of the composite — see what we don't score for why.
Cost difference
ITOT is 6 bps cheaper than SPY. On a $100,000 position that's about $64/yr more in fees for SPY.
Fee figure is the annual expense charged on $100,000. To see how the gap compounds over a multi-decade holding period, open the cost calculator pre-filled with ITOT vs SPY.
Top shared holdings
473 shared in total| # | Holding | In ITOT | In SPY | Overlap |
|---|---|---|---|---|
| 1 | NVIDIA Corp. | 6.63% | 8.50% | 6.63% |
| 2 | Apple, Inc. | 5.81% | 7.32% | 5.81% |
| 3 | Microsoft Corp. | 3.79% | 5.77% | 3.79% |
| 4 | Amazon.com, Inc. | 3.19% | 3.71% | 3.19% |
| 5 | Alphabet, Inc. | 2.86% | 3.03% | 2.86% |
| 6 | Broadcom, Inc. | 2.45% | 2.54% | 2.45% |
| 7 | Alphabet, Inc. | 2.29% | 2.43% | 2.29% |
| 8 | Micron Technology, Inc. | 1.78% | 1.82% | 1.78% |
| 9 | Meta Platforms, Inc. | 1.69% | 2.41% | 1.69% |
| 10 | Tesla, Inc. | 1.62% | 1.57% | 1.57% |
| 11 | Eli Lilly & Co. | 1.30% | 1.37% | 1.30% |
| 12 | Advanced Micro Devices, Inc. | 1.30% | 1.55% | 1.30% |
Only in ITOT
2,025 total- Exxon Mobil Corp. 0.77%
- Linde plc 0.33%
- Seagate Technology Holdings plc 0.30%
- Eaton Corp. plc 0.23%
- Chubb Ltd. 0.17%
- Trane Technologies plc 0.15%
- Space Exploration Technologies Corp. 0.14%
- Medtronic plc 0.14%
- Johnson Controls International plc 0.12%
- Snowflake, Inc. 0.12%
Only in SPY
32 total- EXXONMOBIL HOLDINGS CORP 1.01%
- LINDE PLC 0.33%
- SEAGATE TECHNOLOGY HOLDINGS 0.29%
- EATON CORP PLC 0.25%
- ACCENTURE PLC CL A 0.18%
- CHUBB LTD 0.17%
- MEDTRONIC PLC 0.17%
- TRANE TECHNOLOGIES PLC 0.15%
- JOHNSON CONTROLS INTERNATION 0.14%
- ROYAL CARIBBEAN CRUISES LTD 0.10%
Related comparisons
More comparisons with ITOT
- ITOT vs ESGV · Vanguard ESG U.S. Stock ETF 79.1%
- ITOT vs AVUS · Avantis US Equity ETF 74.4%
- ITOT vs MGC · Vanguard Morningstar Mega Cap ETF 72.4%
- ITOT vs DFAC · U.S. Core Equity 2 Portfolio-ETF Class Shares 71.9%
- ITOT vs ESGU · iShares ESG Aware MSCI USA ETF 71.8%
- ITOT vs GSLC · Goldman Sachs ActiveBeta U.S. Large Cap Equity ETF 71.3%
More comparisons with SPY
- SPY vs DFAU · Dimensional US Core Equity Market ETF 82.7%
- SPY vs MGC · Vanguard Morningstar Mega Cap ETF 81.8%
- SPY vs ESGV · Vanguard ESG U.S. Stock ETF 81.0%
- SPY vs ESGU · iShares ESG Aware MSCI USA ETF 76.3%
- SPY vs GSLC · Goldman Sachs ActiveBeta U.S. Large Cap Equity ETF 73.1%
- SPY vs OEF · iShares S&P 100 ETF 71.3%
Percentages are holdings overlap with the named fund.
Open ITOT or SPY at a brokerage
Both funds trade commission-free at major US brokerages.
Affiliate links — opening an account through these earns PlainIndex a one-time referral. Scoring is computed before any affiliate consideration; see our methodology and funding disclosure.
Holdings overlap is the sum of min(weight_a, weight_b) over positions
matched on ISIN (CUSIP fallback). Methodology: see
/methodology/.
Comparing two funds doesn't endorse swapping one for the other. Tax-lot history, account type, and personal goals matter — PlainIndex publishes data and methodology, not investment advice.