ITOT vs SPTM: Holdings Overlap
ITOTiShares Core S&P Total U.S. Stock Market ETF
iShares · 2487 holdings · $97.6B · as of 2026-03-31
SPTMState Street® SPDR® Portfolio S&P 1500® Composite Stock Market ETF
State Street (SPDR) · 1506 holdings · $13.6B · as of 2026-08-06
Holdings snapshots are 128 days apart (ITOT: 2026-03-31, SPTM: 2026-08-06). 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 ITOT and SPTM?
iShares Core S&P Total U.S. Stock Market ETF (ITOT, by iShares) holds 2487 positions; State Street® SPDR® Portfolio S&P 1500® Composite Stock Market ETF (SPTM, by State Street (SPDR)) holds 1506. They have 1488 holdings in common, and by portfolio weight the two funds are 89.2% identical. In practical terms the pair is essentially interchangeable, so holding both adds little diversification.
- Overlap by Weight
- 89.2%Sum of the smaller weight of each shared holding
- Shared Holdings
- 1488ITOT holds 2487 · SPTM holds 1506
- Weight in Shared Holdings
- ITOT 94%·SPTM 99%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 ITOT
999 of 2487 positions (5.3% of the fund) are not held by SPTM. Showing the top 30 by weight.
Sector Breakdown
| Sector | ITOT | SPTM |
|---|---|---|
| Information Technology | 30.8% | 35.8% |
| Financials | 12.9% | 12.6% |
| Industrials | 10.2% | 9.8% |
| Health Care | 9.9% | 9.0% |
| Consumer Discretionary | 9.9% | 9.5% |
| Other Sectors | 26.0% | 23.1% |
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 |
|---|---|---|---|---|---|---|---|
| ITOT | +3.3% | +14.6% | +24.1% | +20.9% | +12.3% | +14.9% | 0.97% |
| SPTM | +3.4% | +14.5% | +24.1% | +20.8% | +13.1% | +15.1% | 1.03% |
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 ITOT vs SPTM →
Shared Holdings(1488)
The top 10 shared positions account for 35% of the overlap, led by NVDA, AAPL and MSFT.
 NVDANVIDIA Corp. COM | 6.69% | 7.38% | 6.69% |
|---|---|---|---|
 AAPLApple Inc. COM | 5.88% | 6.39% | 5.88% |
 MSFTMicrosoft Corp. COM | 4.34% | 5.17% | 4.34% |
 AMZNAmazon.com, Inc. COM | 3.21% | 3.71% | 3.21% |
 GOOGLAlphabet Inc. CAP STK CL A | 2.64% | 2.92% | 2.64% |
 AVGOBroadcom Inc COM | 2.32% | 2.77% | 2.32% |
 GOOGAlphabet Inc. CAP STK CL C | 2.12% | 2.34% | 2.12% |
 METAMeta Platforms, Inc., Class A | 1.98% | 1.80% | 1.80% |
 BRK-BBerkshire Hathaway, Inc., Class B | 1.39% | 1.34% | 1.34% |
 JPMJPMorgan Chase & Co. COM | 1.25% | 1.33% | 1.25% |
 TSLATesla Inc COM | 1.65% | 1.25% | 1.25% |
 LLYEli Lilly & Co. COM | 1.15% | 1.31% | 1.15% |
 JNJJohnson & Johnson COM | 0.93% | 0.86% | 0.86% |
 VVisa, Inc., Class A | 0.80% | 0.86% | 0.80% |
 WMTWalmart Inc COM | 0.86% | 0.69% | 0.69% |
 MAMasterCard Incorporated CL A | 0.64% | 0.65% | 0.64% |
 ABBVAbbVie Inc. COM | 0.61% | 0.60% | 0.60% |
 MUMicron Technology Inc. COM | 0.60% | 1.38% | 0.60% |
 COSTCostco Wholesale Corporation COM | 0.70% | 0.58% | 0.58% |
 AMDAdvanced Micro Devices Inc. COM | 0.52% | 1.11% | 0.52% |
 CATCaterpillar Inc COM | 0.52% | 0.55% | 0.52% |
 BACBank of America Corp. COM | 0.51% | 0.57% | 0.51% |
 PLTRPalantir Technologies, Inc., Class A | 0.53% | 0.50% | 0.50% |
 CVXChevron Corp. COM | 0.61% | 0.49% | 0.49% |
 CSCOCisco Systems, Inc. COM | 0.48% | 0.67% | 0.48% |
Showing the top 250 of 1488 shared holdings by overlap weight.
Frequently Asked Questions
How much do ITOT and SPTM overlap?
ITOT and SPTM overlap by 89.2% of portfolio weight. They share 1488 holdings (ITOT holds 2487 positions and SPTM holds 1506), based on each fund's latest SEC-reported holdings.
Is it redundant to own both ITOT and SPTM?
The two portfolios are 89.2% identical by weight. Owning both is largely redundant: they are close to the same portfolio, so a second position mostly duplicates the first.
What are the biggest shared holdings of ITOT and SPTM?
The largest positions held by both funds are NVDA, AAPL, MSFT, AMZN and GOOGL. Together the top 10 shared positions account for 35% of the total overlap.
What does ITOT own that SPTM doesn't?
999 positions (5.3% of ITOT) are unique to ITOT, led by XOM, HON and NET. In the other direction, 18 positions (1.2% of SPTM) are unique to SPTM.