ETF Overlap Checker
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ETF Overlap Checker

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IWF vs VXF Overlap

IWF is a U.S. growth equity ETF from IShares, while VXF is an equity ETF from Vanguard. IWF and VXF show limited overlap, with an estimated weighted overlap of 4.08%. They share 184 holdings in the loaded dataset, led by 18915M107, 833445109, and 02043Q107.

4.1% overlap
#
184Shared Holdings
OK
Low Overlap

Freshly computed.

Quick Answer

IWF is a U.S. growth equity ETF from IShares, while VXF is an equity ETF from Vanguard. IWF and VXF show limited overlap, with an estimated weighted overlap of 4.08%. They share 184 holdings in the loaded dataset, led by 18915M107, 833445109, and 02043Q107.

  • 4.08% weighted overlap across 184 shared holdings.
  • The top three shared holdings explain 13.85% of the measured overlap.
  • IWF and VXF 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 can still add materially different exposure.

Data Freshness

IWF holdings
Aug 13, 2026
VXF holdings
Aug 13, 2026
Overlap computed
Aug 13, 2026
Data source
Financial Modeling Prep

Review the methodology for the overlap formula and refresh policy.

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About These ETFs

ETF A

IWF

iShares Russell 1000 Growth ETF

Issuer
IShares
Asset class
Equity
Expense ratio
0.18%
AUM
$127B
Inception
May 22, 2000

ETF B

VXF

Vanguard Extended Market ETF

Issuer
Vanguard
Asset class
Mid Cap Equity
Expense ratio
0.05%
AUM
$98B
Inception
Dec 27, 2001

What Stands Out In This Comparison

01

What This Means

IWF is a U.S. growth equity ETF from IShares, while VXF is an equity ETF from Vanguard. IWF and VXF 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 18915M107, 833445109, and 02043Q107.

02

How They Differ

IWF is a U.S. growth equity ETF from IShares, while VXF is an equity ETF from Vanguard. Neither fund clearly dominates on breadth, so the practical difference is more about weighting, index construction, and cost. VXF has the lower expense ratio, while IWF charges more for its exposure.

03

What Drives The Overlap

The overlap is driven by a relatively small set of large shared positions. The top three shared holdings account for 13.85% of the score, which means the result is heavily influenced by the biggest common weights rather than a long tail of tiny positions.

04

When One May Fit Better

Because IWF and VXF are closer in breadth, the better fit usually comes down to index methodology, issuer preference, and cost. VXF has the lower expense ratio, while IWF charges more for its exposure.

Overlap Driver Snapshot

Concentration

The top three shared holdings explain 13.85% 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 VXF.

HoldingNameIWF Wt.VXF Wt.Overlap
18915M107CLOUDFLARE, INC.0.23%0.90%0.23%
833445109SNOWFLAKE INC.0.18%0.71%0.18%
02043Q107ALNYLAM PHARMACEUTICALS, INC.0.15%0.60%0.15%
771049103ROBLOX CORPORATION0.13%0.51%0.13%
457669307INSMED INCORPORATED0.12%0.48%0.12%
773121108ROCKET LAB CORPORATION0.11%0.41%0.11%
16411R208CHENIERE ENERGY, INC.0.10%0.84%0.10%
632307104NATERA, INC.0.10%0.38%0.10%
G3730V105FTAI Aviation Ltd.0.09%0.34%0.09%
22266T109COUPANG, INC.0.09%0.35%0.09%

Why These ETFs Overlap

IWF is a U.S. growth equity ETF from IShares, while VXF is an 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 18915M107, 833445109, and 02043Q107, which appear in both portfolios and push the overlap score higher.

Holding both IWF and VXF 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.

Related Comparisons

AGG vs IWF->AGG vs VXF->BND vs IWF->BND vs VXF->

Frequently Asked Questions About IWF and VXF

What is the overlap between IWF and VXF?+
IWF and VXF currently show an estimated weighted overlap of 4.08% based on the loaded holdings data.
How many holdings do IWF and VXF share?+
They share 184 holdings in the current dataset.
Is the IWF and VXF overlap high?+
The current verdict is Low Overlap. That means the two ETFs have limited duplication in portfolio weight.
Why do IWF and VXF overlap?+
IWF and VXF overlap because the same large positions appear in both funds. In this comparison, the top three shared holdings explain 13.85% of the measured overlap score.
Which ETF is broader, IWF or VXF?+
IWF and VXF look closer in breadth than a broad-vs-niche pair, so the main difference is more about strategy and weighting than simple market coverage.

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How Overlap Is Calculated

A straightforward approach used by portfolio analysts.

Overlap = sum(min(Weight_A, Weight_B)) for each shared holding

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.

Looking for another pair? Start from the homepage or open the canonical URL for this comparison at /compare/IWF-VXF.