ITOT is an equity ETF from IShares, while SPLG is a U.S. large-cap core ETF from SPDR. ITOT and SPLG show very heavy overlap, with an estimated weighted overlap of 80.55%. They share 465 holdings in the loaded dataset, led by NVDA, AAPL, and MSFT.
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ITOT is an equity ETF from IShares, while SPLG is a U.S. large-cap core ETF from SPDR. ITOT and SPLG show very heavy overlap, with an estimated weighted overlap of 80.55%. They share 465 holdings in the loaded dataset, led by NVDA, AAPL, and MSFT.
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ITOT is an equity ETF from IShares, while SPLG is a U.S. large-cap core ETF from SPDR. ITOT and SPLG are closely aligned. A large share of their portfolio weight is invested in the same companies, especially NVDA, AAPL, and MSFT, which means holding both is likely to feel similar to increasing the size of one core position.
ITOT is an equity ETF from IShares, while SPLG is a U.S. large-cap core ETF from SPDR. SPLG is the broader fund, while ITOT is the more targeted sleeve. ITOT and SPLG are priced very similarly on expense ratio.
The overlap is driven by a relatively small set of large shared positions. The top three shared holdings account for 20.99% of the score, which means the result is heavily influenced by the biggest common weights rather than a long tail of tiny positions.
If you want the broader portfolio building block, SPLG is usually the wider choice. If you want the more focused tilt, ITOT is the narrower expression. ITOT and SPLG are priced very similarly on expense ratio.
Concentration
The top three shared holdings explain 20.99% of the full overlap score.
That helps show whether the score comes from a handful of giant shared positions or from a broader mix of common holdings.
Shared Sector Tilt
Sector tags are not consistently available for the biggest shared positions in this dataset, so this comparison leans more on the specific holdings than on sector labels.
These are the holdings contributing the most to the overlap score between ITOT and SPLG.
| Holding | Name | ITOT Wt. | SPLG Wt. | Overlap |
|---|---|---|---|---|
| NVDA | NVIDIA Corp. | 6.69% | 8.58% | 6.69% |
| AAPL | Apple, Inc. | 5.88% | 6.80% | 5.88% |
| MSFT | Microsoft Corp. | 4.34% | 6.84% | 4.34% |
| AMZN | Amazon.com, Inc. | 3.21% | 3.80% | 3.21% |
| GOOGL | Alphabet, Inc. | 2.64% | 2.71% | 2.64% |
| AVGO | Broadcom, Inc. | 2.32% | 3.08% | 2.32% |
| GOOG | Alphabet, Inc. | 2.12% | 2.18% | 2.12% |
| META | Meta Platforms, Inc. | 1.98% | 2.77% | 1.98% |
| TSLA | Tesla, Inc. | 1.65% | 2.20% | 1.65% |
| BRK.B | Berkshire Hathaway, Inc. | 1.39% | 1.48% | 1.39% |
ITOT is an equity ETF from IShares, while SPLG is a U.S. large-cap core ETF from SPDR. The overlap exists because both funds allocate meaningful weight to the same holdings. In this dataset, the biggest shared drivers are NVDA, AAPL, and MSFT, which appear in both portfolios and push the overlap score higher.
Holding both ITOT and SPLG is usually redundant unless you have a very specific reason to tilt toward their shared holdings. In most cases, one ETF is enough.
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A straightforward approach used by portfolio analysts.
For every stock that appears in both ETFs, we take the smaller of the two weights. Adding up all those minimums gives the total overlap percentage. A score of 100% means the two ETFs hold the exact same stocks in the same proportions.
Want the full explanation? Read the methodology page.