IWMvsIWOETF Comparison

ETF 1

IWM

iShares Russell 2000 ETF

This fund is part of

US Small Cap

+0.59%

Full IWM fund page

ETF 2

IWO

iShares Russell 2000 Growth ETF

This fund is part of

US Small Cap Growth

+0.63%

Full IWO fund page

iShares Russell 2000 ETF (IWM) belongs to the US Small Cap segment. iShares Russell 2000 Growth ETF (IWO) is part of the US Small Cap Growth segment. IWM's top 3 sector exposures are Industrials, Information Technology and Financials. In contrast, IWO's top sector exposures are Information Technology, Industrials and Health Care. IWM is less expensive with a Total Expense Ratio (TER) of 0.19%, versus 0.24% for IWO. IWM is up 15.55% year-to-date (YTD) with -$6.80B in YTD flows. IWO performs worse with 14.33% YTD performance, and -$770M in YTD flows. Run a side-by-side ETF comparison of IWM and IWO below, and assess how they stack up in performance, liquidity, risk, exposure, holdings, and more, helping you select the best ETF for your investments.

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IWM vs IWO performance and flow charts

Performance

Cumulative Flows

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Daily, global ETF data for advanced analysis or integration into apps (API), from our partner Trackinsight.

Data Services

Historic performance and flows

Data as of 06/08/2026

		1M	3M	YTD	1Y	3Y	5Y
Perf.	IWM IWO	-0.09%+0.05%	+12.12%+13.48%	+15.55%+14.33%	+34.64%+31.66%	+57.57%+57.07%	+29.67%+24.95%
Flows	IWM IWO	-$1.49B-$105M	-$1.29B-$121M	-$6.80B-$770M	-$4.80B-$685M	-$3.43B-$862M	-$3.74B-$362M

Volatility and drawdown

		3M	1Y	3Y	5Y
Volatility	IWM IWO	+21.52%+25.49%	+19.60%+21.96%	+21.24%+22.65%	+22.64%+24.63%
Max drawdown	IWM IWO	-5.40%-7.50%	-11.03%-14.82%	-27.52%-28.47%	-31.96%-40.45%
Max drawdown duration	IWM IWO	29d29d	82d84d	289d280d	1093d1409d

Trading data

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	IWM	IWO
Last sale 6/9/2026 at 1:30 PM	$285.02	$370.61
Previous close 06/08/2026	$284.11	$369.68
Consolidated volume 06/08/2026
Average volume 30 days
Average discount or premium 30 days
Average Bid/Ask spread 30 days

Replication quality

Data as of May 29, 2026

1-year trailing difference

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	IWM	IWO
Tracking error
Tracking difference
1 year cumulative return difference
Best
Worst
Daily return difference
Average
Worst

Main metrics

Last update 6/9/2026 at 1:30 PM

Live

Closed

	IWM	IWO
Last price	$285.02	$370.61
1D performance	+0.32%	+0.25%
AuM	$77.64 B	$14.28 B
E/R	0.19%	0.24%

Characteristics

	IWM	IWO
Management strategy	Passive	Passive
Provider	iShares	iShares
Benchmark	Russell 2000 Index	Russell 2000 Growth Index
N° of holdings	1597	890
Asset class	Equities	Equities
Trailing 12m distribution yield	Join	Join
Inception date	May 22, 2000	July 24, 2000
ESG	No	No

More IWM data on Trackinsight

More IWO data on Trackinsight

Exposure

Countries

IWM

USA

92.01%

Other

7.99%

IWO

USA

92.8%

Other

7.2%

Sectors

IWM

Industrials

16.29%

Information Techn.

16.04%

Financials

13.99%

Health Care

13.64%

Consumer Discreti.

8.12%

Other

31.92%

IWO

Information Techn.

21.84%

Industrials

21.02%

Health Care

19.04%

Consumer Discreti.

7.83%

Other

30.27%

Diversification

IWM

Total weight of top 15 holdings out of 15

8.86%

IWO

Total weight of top 15 holdings out of 15

15.88%

Top 15 holdings

Data as of April 30, 2026

IWM

BLOOM ENERGY CORP

1.88%

CREDO TECHNOLOGY GROUP HOLDING

0.85%

FABRINET

0.75%

COEUR MINING INC

0.56%

US65290E1010

0.53%

ECHOSTAR

0.51%

TTM TECHNOLOGIES

0.49%

IONQ

0.47%

STERLING INFRASTRUCTURE INC

0.47%

ADVANCED ENERGY INDUSTRIES

0.44%

MODINE MNFC CO

0.41%

SITIME CORP

0.38%

RAMBUS

0.38%

US0669224778

0.37%

VIAVI SOLUTIONS INC

0.37%

IWO

BLOOM ENERGY CORP

3.64%

CREDO TECHNOLOGY GROUP HOLDING

1.65%

FABRINET

1.45%

IONQ

0.92%

STERLING INFRASTRUCTURE INC

0.90%

ADVANCED ENERGY INDUSTRIES

0.85%

US65290E1010

0.82%

MODINE MNFC CO

0.78%

SITIME CORP

0.74%

RAMBUS

0.73%

DYCOM INDUSTRIES

0.71%

VIAVI SOLUTIONS INC

0.71%

KRATOS DEFENSE AND SECURITY SOLS

0.67%

BRIDGEBIO PHARMA

0.66%

GUARDANT HEALTH INC

0.64%

Frequently asked questions about IWM and IWO

How have the IWM and IWO ETFs performed in 2026?

As of June 8, 2026, IWM is up 15.55% year-to-date (YTD), while IWO has returned 14.33%. That puts IWM better performer ahead so far this year.

Which ETF is attracting more investor money: IWM or IWO?

Year-to-date, the IWM ETF saw -$6.80B in flows, compared to -$770M for IWO.

Which ETF is more volatile: IWM or IWO?

Over the past year, IWM had a volatility of 19.6%, while IWO experienced 21.96%.

Which ETF is bigger: IWM or IWO?

As of June 8, 2026, IWM holds $77.64 B in assets under management (AUM), while IWO manages $14.28 B.

What sectors do the IWM and IWO ETFs invest in?

IWM leans toward sectors like Industrials, Information Technology and Financials. Meanwhile, IWO focuses on Information Technology, Industrials and Health Care.

What are the top holdings of the IWM ETF and IWO ETF?

IWM top holdings include BLOOM ENERGY CORP, CREDO TECHNOLOGY GROUP HOLDING and FABRINET. IWO holds in its top three: BLOOM ENERGY CORP, CREDO TECHNOLOGY GROUP HOLDING and FABRINET.

IWMvsIWOETF Comparison

iShares Russell 2000 ETF

iShares Russell 2000 Growth ETF

IWM vs IWO performance and flow charts

Performance

Cumulative Flows

Get all the metrics on this page, and more, through a reliable ETF data feed

Countries

Sectors

Diversification

Top 15 holdings

How have the IWM and IWO ETFs performed in 2026?

As of June 8, 2026, IWM is up 15.55% year-to-date (YTD), while IWO has returned 14.33%. That puts IWM better performer ahead so far this year.

Which ETF is attracting more investor money: IWM or IWO?

Year-to-date, the IWM ETF saw -$6.80B in flows, compared to -$770M for IWO.

Which ETF is more volatile: IWM or IWO?

Over the past year, IWM had a volatility of 19.6%, while IWO experienced 21.96%.

Which ETF is bigger: IWM or IWO?

As of June 8, 2026, IWM holds $77.64 B in assets under management (AUM), while IWO manages $14.28 B.

What sectors do the IWM and IWO ETFs invest in?

IWM leans toward sectors like Industrials, Information Technology and Financials. Meanwhile, IWO focuses on Information Technology, Industrials and Health Care.

What are the top holdings of the IWM ETF and IWO ETF?

IWM top holdings include BLOOM ENERGY CORP, CREDO TECHNOLOGY GROUP HOLDING and FABRINET. IWO holds in its top three: BLOOM ENERGY CORP, CREDO TECHNOLOGY GROUP HOLDING and FABRINET.

Which ETF is more diversified: IWM or IWO?

IWM holds 1919 securities with 8.86% of its assets in the top 15. IWO has 1090 securities and a top 15 weight of 15.88%.

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