IWR vs SPLG Overlap
IWR is a mid-cap U.S. equity ETF from IShares, while SPLG is a U.S. large-cap core ETF from SPDR. IWR and SPLG show limited overlap, with an estimated weighted overlap of 12.91%. They share 290 holdings in the loaded dataset, led by HOOD, HWM, and COIN.
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Quick Answer
IWR is a mid-cap U.S. equity ETF from IShares, while SPLG is a U.S. large-cap core ETF from SPDR. IWR and SPLG show limited overlap, with an estimated weighted overlap of 12.91%. They share 290 holdings in the loaded dataset, led by HOOD, HWM, and COIN.
- 12.91% weighted overlap across 290 shared holdings.
- The top three shared holdings explain 3.62% of the measured overlap.
- SPLG is the broader fund, while IWR is more targeted.
- The overlap is mostly explained by the top shared positions rather than sector labels alone.
- Holding both can still add materially different exposure.
Data Freshness
- IWR holdings
- Mar 12, 2026
- SPLG holdings
- Mar 12, 2026
- Overlap computed
- Mar 15, 2026
- Data source
- Financial Modeling Prep
Review the methodology for the overlap formula and refresh policy.
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About These ETFs
What Stands Out In This Comparison
What This Means
IWR is a mid-cap U.S. equity ETF from IShares, while SPLG is a U.S. large-cap core ETF from SPDR. IWR and SPLG do not own much of the same portfolio weight. That usually means you are combining different parts of the market, with only a small amount of duplication through names like HOOD, HWM, and COIN.
How They Differ
IWR is a mid-cap U.S. equity ETF from IShares, while SPLG is a U.S. large-cap core ETF from SPDR. SPLG is the broader fund, while IWR is the more targeted sleeve. SPLG has the lower expense ratio, while IWR charges more for its exposure.
What Drives The Overlap
The overlap is driven by a relatively small set of large shared positions. The top three shared holdings account for 3.62% of the score, which means the result is heavily influenced by the biggest common weights rather than a long tail of tiny positions.
When One May Fit Better
If you want the broader portfolio building block, SPLG is usually the wider choice. If you want the more focused tilt, IWR is the narrower expression. SPLG has the lower expense ratio, while IWR charges more for its exposure.
Overlap Driver Snapshot
Concentration
The top three shared holdings explain 3.62% 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.
Top Shared Holdings
These are the holdings contributing the most to the overlap score between IWR and SPLG.
| Holding | Name | IWR Wt. | SPLG Wt. | Overlap |
|---|---|---|---|---|
| HOOD | ROBINHOOD MARKETS INC CLASS A | 0.45% | 0.19% | 0.19% |
| HWM | HOWMET AEROSPACE INC | 0.79% | 0.14% | 0.14% |
| COIN | COINBASE GLOBAL INC CLASS A | 0.34% | 0.14% | 0.14% |
| BK | BANK OF NEW YORK MELLON CORP | 0.63% | 0.13% | 0.13% |
| GLW | CORNING INC | 0.83% | 0.11% | 0.11% |
| COR | CENCORA INC | 0.50% | 0.11% | 0.11% |
| PWR | QUANTA SERVICES INC | 0.65% | 0.11% | 0.11% |
| HLT | HILTON WORLDWIDE HOLDINGS INC | 0.53% | 0.10% | 0.10% |
| VST | VISTRA CORP | 0.43% | 0.10% | 0.10% |
| AXON | AXON ENTERPRISE INC | 0.31% | 0.10% | 0.10% |
Why These ETFs Overlap
IWR is a mid-cap U.S. 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 HOOD, HWM, and COIN, which appear in both portfolios and push the overlap score higher.
Holding both IWR and SPLG can make sense if you want exposure to different sleeves of the market. The overlap is small enough that both funds may still improve diversification.
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Frequently Asked Questions About IWR and SPLG
What is the overlap between IWR and SPLG?+
How many holdings do IWR and SPLG share?+
Is the IWR and SPLG overlap high?+
Why do IWR and SPLG overlap?+
Which ETF is broader, IWR or SPLG?+
How Overlap Is Calculated
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.