SPY vs ITOT: Holdings Overlap
SPYState Street® SPDR® S&P 500® ETF Trust
State Street (SPDR) · 504 holdings · $812.0B · as of 2026-08-06
ITOTiShares Core S&P Total U.S. Stock Market ETF
iShares · 2487 holdings · $97.6B · as of 2026-03-31
Holdings snapshots are 128 days apart (SPY: 2026-08-06, ITOT: 2026-03-31). Weights and index membership change between snapshots, so the true current overlap is typically higher than shown. For funds tracking the same index, the gap can be 5–15 points.
How similar are SPY and ITOT?
State Street® SPDR® S&P 500® ETF Trust (SPY, by State Street (SPDR)) holds 504 positions; iShares Core S&P Total U.S. Stock Market ETF (ITOT, by iShares) holds 2487. They have 497 holdings in common, and by portfolio weight the two funds are 84.5% identical. In practical terms the pair is heavily overlapping, with largely the same stocks driving both funds.
- Overlap by Weight
- 84.5%Sum of the smaller weight of each shared holding
- Shared Holdings
- 497SPY holds 504 · ITOT holds 2487
- Weight in Shared Holdings
- SPY 99%·ITOT 87%Share of each fund's weight in stocks both funds own
Based on each fund's latest official holdings. How is this calculated?
What makes each fund different
Only in SPY
7 of 504 positions (1.3% of the fund) are not held by ITOT.
Sector Breakdown
| Sector | SPY | ITOT |
|---|---|---|
| Information Technology | 37.6% | 30.8% |
| Financials | 12.3% | 12.9% |
| Industrials | 8.8% | 10.2% |
| Health Care | 8.9% | 9.9% |
| Consumer Discretionary | 9.3% | 9.9% |
| Other Sectors | 23.1% | 26.0% |
Share of each fund's portfolio weight by GICS-style sector, compiled from issuer fund data and our own classification of the holdings, not the issuers' published sector charts.
Performance
| Fund | 1M | YTD | 1Y | 3Y (ann.) | 5Y (ann.) | 10Y (ann.) | Yield |
|---|---|---|---|---|---|---|---|
| SPY | +3.4% | +14.0% | +23.7% | +21.2% | +13.3% | +15.3% | 0.97% |
| ITOT | +3.3% | +14.6% | +24.1% | +20.9% | +12.3% | +14.9% | 0.97% |
Total returns including dividends, from adjusted daily closes as of 2026-08-07. 3Y/5Y/10Y are annualized. Yield is trailing-12-month distributions over the last close. Past performance does not predict future results.
Project the growth of $10,000 in SPY vs ITOT →
Shared Holdings(497)
The top 10 shared positions account for 38% of the overlap, led by NVDA, AAPL and MSFT.
 NVDANVIDIA Corp. COM | 8.00% | 6.69% | 6.69% |
|---|---|---|---|
 AAPLApple Inc. COM | 6.92% | 5.88% | 5.88% |
 MSFTMicrosoft Corp. COM | 5.60% | 4.34% | 4.34% |
 AMZNAmazon.com, Inc. COM | 4.02% | 3.21% | 3.21% |
 GOOGLAlphabet Inc. CAP STK CL A | 3.16% | 2.64% | 2.64% |
 AVGOBroadcom Inc COM | 3.00% | 2.32% | 2.32% |
 GOOGAlphabet Inc. CAP STK CL C | 2.54% | 2.12% | 2.12% |
 METAMeta Platforms, Inc., Class A | 1.95% | 1.98% | 1.95% |
 BRK-BBerkshire Hathaway, Inc., Class B | 1.45% | 1.39% | 1.39% |
 TSLATesla Inc COM | 1.36% | 1.65% | 1.36% |
 JPMJPMorgan Chase & Co. COM | 1.44% | 1.25% | 1.25% |
 LLYEli Lilly & Co. COM | 1.42% | 1.15% | 1.15% |
 JNJJohnson & Johnson COM | 0.93% | 0.93% | 0.93% |
 VVisa, Inc., Class A | 0.93% | 0.80% | 0.80% |
 WMTWalmart Inc COM | 0.74% | 0.86% | 0.74% |
 MAMasterCard Incorporated CL A | 0.70% | 0.64% | 0.64% |
 COSTCostco Wholesale Corporation COM | 0.63% | 0.70% | 0.63% |
 ABBVAbbVie Inc. COM | 0.65% | 0.61% | 0.61% |
 MUMicron Technology Inc. COM | 1.50% | 0.60% | 0.60% |
 CVXChevron Corp. COM | 0.53% | 0.61% | 0.53% |
 PLTRPalantir Technologies, Inc., Class A | 0.54% | 0.53% | 0.53% |
 AMDAdvanced Micro Devices Inc. COM | 1.20% | 0.52% | 0.52% |
 CATCaterpillar Inc COM | 0.59% | 0.52% | 0.52% |
 HDHome Depot, Inc. (The) | 0.52% | 0.52% | 0.52% |
 PGThe Procter & Gamble Co. COM | 0.52% | 0.53% | 0.52% |
Showing the top 250 of 497 shared holdings by overlap weight.
Frequently Asked Questions
How much do SPY and ITOT overlap?
SPY and ITOT overlap by 84.5% of portfolio weight. They share 497 holdings (SPY holds 504 positions and ITOT holds 2487), based on each fund's latest SEC-reported holdings.
Is it redundant to own both SPY and ITOT?
The two portfolios are 84.5% identical by weight. Owning both mostly doubles down on the shared core rather than diversifying: the same large positions drive both funds.
What are the biggest shared holdings of SPY and ITOT?
The largest positions held by both funds are NVDA, AAPL, MSFT, AMZN and GOOGL. Together the top 10 shared positions account for 38% of the total overlap.
What does SPY own that ITOT doesn't?
7 positions (1.3% of SPY) are unique to SPY, led by XOM, HON and HONA. In the other direction, 1990 positions (12.8% of ITOT) are unique to ITOT.