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IWO ETF Profile

IWO is a U.S. growth equity ETF from IShares. Its largest disclosed positions include 066922519, 093712107, and KYG3323L1005, and the top three holdings account for 16.93% of portfolio weight shown here. On ETF Overlap Checker, it currently connects to 64 comparison pages.

Issuer

IShares

Asset Class

Equity

Holdings

1104

Compare Pages

64

About IWO

The iShares Russell 2000 Growth ETF is designed to mirror the financial performance of an index that specifically invests in U.S. equities from smaller companies displaying strong growth characteristics.

  • IWO has a broad holdings footprint, with 1104 positions in the latest imported dataset.
  • The largest disclosed position is 066922519 at 13.68% of the portfolio.
  • The top three disclosed holdings make up 16.93% of the portfolio, and the top ten add up to 22.93%.
  • Sector labels are limited in the visible top holdings, so the biggest positions matter more than sector buckets here.
  • IWO currently appears in 64 active ETF comparison pages on this site.

Data And Coverage

Expense ratio
0.24%
AUM
$15B
Inception date
Jul 24, 2000
Holdings updated
Aug 13, 2026
Data source
Financial Modeling Prep

Review the methodology for the overlap formula and visit the ETF directory for the full set of indexed fund hubs.

Compare IWO with another ETF

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What Stands Out About IWO

01

Portfolio Shape

The disclosed top holdings suggest a broad portfolio rather than a narrow single-theme sleeve. 066922519, 093712107, and KYG3323L1005 are the largest visible positions, but the top three holdings add up to only 16.93% and the top ten to 22.93%. Sector labels are limited in the visible top holdings, so the concentration read is driven mainly by the largest names themselves.

02

What Kind Of Overlap To Expect

IWO should show the most meaningful overlap with adjacent style, factor, or dividend funds that own similar large positions. Comparisons against broader market or international ETFs will usually look more differentiated. That makes overlap checks useful before stacking multiple factor tilts that may still share the same core names.

03

When Investors Compare It

On this site, investors often compare IWO with VOO, VTI, and QQQ. Those matchups usually answer a simple question: does adding this fund create a different sleeve, or does it mostly duplicate exposure you already own? IWO currently connects to 64 live comparison pages.

Holdings Concentration Snapshot

Concentration

Largest disclosed holding
13.68%
Top 3 holdings
16.93%
Top 10 holdings
22.93%
Total holdings
1104

These numbers help show whether IWO behaves more like a broad portfolio building block or a fund where the biggest positions dominate the ride.

Visible Sector Mix

Sector labels are limited in the visible top holdings for IWO, so the strongest signal here is still the size of the largest positions themselves.

Top Holdings

These holdings help explain how IWO overlaps with other funds. The top ten disclosed positions represent 22.93% of the portfolio shown here.

Methodology
HoldingNameSectorWeight
066922519BlackRock Funds IIIN/A13.68%
093712107Bloom Energy Corp.N/A1.99%
KYG3323L1005FabrinetN/A1.26%
KYG254571055Credo Technology Group Holding Ltd.N/A1.02%
NXTNextpower, Inc.N/A0.94%
KTOSKratos Defense & Security Solutions, Inc.N/A0.86%
AEISAdvanced Energy Industries, Inc.N/A0.82%
STRLSterling Infrastructure, Inc.N/A0.81%
10806X102Bridgebio Pharma, Inc.N/A0.79%
40131M109Guardant Health, Inc.N/A0.77%

Related Overlap Comparisons

Use these pages to see whether adding IWO changes your exposure or mostly duplicates positions you already own.

IWO vs VOO->IWO vs VTI->IWO vs QQQ->IWO vs VGT->IWO vs SCHD->IWO vs VYM->IWO vs VXUS->IWO vs SPY->AGG vs IWO->BND vs IWO->DGRO vs IWO->DIA vs IWO->

Frequently Asked Questions About IWO

What kind of ETF is IWO?+
IWO is a U.S. growth equity ETF.
What are the biggest holdings in IWO?+
IWO's largest disclosed positions currently include 066922519, 093712107, and KYG3323L1005. The single biggest visible holding is 066922519 at 13.68% of the portfolio.
Is IWO concentrated?+
Based on the visible top holdings, IWO's top three positions account for 16.93% of the portfolio and the top ten account for 22.93%. That gives a practical read on whether the fund looks broad or more top-heavy.
What kind of overlap should you expect from IWO?+
IWO should show the most meaningful overlap with adjacent style, factor, or dividend funds that own similar large positions. Comparisons against broader market or international ETFs will usually look more differentiated. That makes overlap checks useful before stacking multiple factor tilts that may still share the same core names.
How can you compare IWO with other ETFs?+
Use the comparison pages linked from this profile to see overlap score, shared holdings, and diversification differences. Popular comparisons for IWO on this site include VOO, VTI, and QQQ, and the fund currently appears in 64 active comparison pages.