IWF vs MGK Overlap
IWF is a U.S. growth equity ETF from IShares, while MGK is a U.S. growth equity ETF from Vanguard. IWF and MGK show very heavy overlap, with an estimated weighted overlap of 77.04%. They share 56 holdings in the loaded dataset, led by NVDA, AAPL, and MSFT.
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Quick Answer
IWF is a U.S. growth equity ETF from IShares, while MGK is a U.S. growth equity ETF from Vanguard. IWF and MGK show very heavy overlap, with an estimated weighted overlap of 77.04%. They share 56 holdings in the loaded dataset, led by NVDA, AAPL, and MSFT.
- 77.04% weighted overlap across 56 shared holdings.
- The top three shared holdings explain 42.52% of the measured overlap.
- IWF and MGK are closer in breadth than a broad-vs-niche ETF pair.
- The overlap is mostly explained by the top shared positions rather than sector labels alone.
- Holding both may add less diversification than the fund names imply.
Data Freshness
- IWF holdings
- Mar 12, 2026
- MGK 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
IWF is a U.S. growth equity ETF from IShares, while MGK is a U.S. growth equity ETF from Vanguard. IWF and MGK 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.
How They Differ
IWF is a U.S. growth equity ETF from IShares, while MGK is a U.S. growth equity ETF from Vanguard. Neither fund clearly dominates on breadth, so the practical difference is more about weighting, index construction, and cost. MGK has the lower expense ratio, while IWF 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 42.52% 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
Because IWF and MGK are closer in breadth, the better fit usually comes down to index methodology, issuer preference, and cost. MGK has the lower expense ratio, while IWF charges more for its exposure.
Overlap Driver Snapshot
Concentration
The top three shared holdings explain 42.52% 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 IWF and MGK.
| Holding | Name | IWF Wt. | MGK Wt. | Overlap |
|---|---|---|---|---|
| NVDA | NVIDIA CORP | 12.68% | 13.52% | 12.68% |
| AAPL | APPLE INC | 11.18% | 11.72% | 11.18% |
| MSFT | MICROSOFT CORP | 8.91% | 9.61% | 8.91% |
| AMZN | AMAZON COM INC | 4.41% | 4.82% | 4.41% |
| AVGO | BROADCOM INC | 4.91% | 3.93% | 3.93% |
| META | META PLATFORMS INC CLASS A | 3.78% | 4.92% | 3.78% |
| TSLA | TESLA INC | 3.54% | 4.35% | 3.54% |
| GOOGL | ALPHABET INC CLASS A | 3.53% | 5.85% | 3.53% |
| GOOG | ALPHABET INC CLASS C | 2.87% | 4.63% | 2.87% |
| LLY | ELI LILLY | 2.79% | 3.22% | 2.79% |
Why These ETFs Overlap
IWF is a U.S. growth equity ETF from IShares, while MGK is a U.S. growth equity ETF from Vanguard. 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 IWF and MGK 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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Frequently Asked Questions About IWF and MGK
What is the overlap between IWF and MGK?+
How many holdings do IWF and MGK share?+
Is the IWF and MGK overlap high?+
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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.