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IWOvsVIOGETF Comparison

ETF 1

IWO

iShares Russell 2000 Growth ETF

This fund is part of

US Small Cap Growth

+0.66%

Full IWO fund page

VS

ETF 2

VIOG

Vanguard S&P Small-Cap 600 Growth ETF

This fund is part of

US Small Cap Growth

+0.66%

Full VIOG fund page

iShares Russell 2000 Growth ETF (IWO) and Vanguard S&P Small-Cap 600 Growth ETF (VIOG) belong to the same industry segment: US Small Cap Growth. IWO's top 3 sector exposures are Healthcare, Technology and Industrials. In contrast, VIOG's top sector exposures are Finance, Industrials and Healthcare. IWO is more expensive with a Total Expense Ratio (TER) of 0.24%, versus 0.1% for VIOG. IWO is up 13.91% year-to-date (YTD) with -$570M in YTD flows. VIOG performs better with 18.44% YTD performance, and +$77M in YTD flows. Run a side-by-side ETF comparison of IWO and VIOG 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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IWO vs VIOG 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 09/11/2026

		1M	3M	YTD	1Y	3Y	5Y
Perf.	IWO VIOG	-5.53%-5.56%	-2.69%-0.51%	+13.91%+18.44%	+16.94%+17.73%	+59.50%+51.50%	+26.01%+31.78%
Flows	IWO VIOG	+$308M-$12M	+$183M+$51M	-$570M+$77M	-$383M+$38M	-$720M+$189M	-$337M+$288M

Volatility and drawdown

		3M	1Y	3Y	5Y
Volatility	IWO VIOG	+18.92%+14.43%	+22.37%+17.38%	+22.97%+19.94%	+24.72%+21.44%
Max drawdown	IWO VIOG	-7.65%-7.45%	-14.82%-9.06%	-28.47%-27.38%	-40.45%-29.24%
Max drawdown duration	IWO VIOG	44d38d	84d41d	280d414d	1409d980d

Trading data

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	IWO	VIOG
Last sale 9/14/2026 at 5:10 PM	$367.18	$141.85
Previous close 09/11/2026	$367.63	$143.22
Consolidated volume 09/11/2026
Average volume 30 days
Average discount or premium 30 days
Average Bid/Ask spread 30 days

Replication quality

Data as of August 31, 2026

1-year trailing difference

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

Main metrics

Last update 9/14/2026 at 5:10 PM

Live

Closed

	IWO	VIOG
Last price	$367.18	$141.85
1D performance	-0.12%	-0.96%
AuM	$14.39 B	$1.05 B
E/R	0.24%	0.1%

Characteristics

	IWO	VIOG
Management strategy	Passive	Passive
Provider	iShares	Vanguard
Benchmark	Russell 2000 Growth Index	S&P SmallCap 600 Growth Index
N° of holdings	1095	348
Asset class	Equities	Equities
Trailing 12m distribution yield	Join	Join
Inception date	July 24, 2000	September 7, 2010
ESG	No	No

More IWO data on Trackinsight

More VIOG data on Trackinsight

Exposure

Countries

IWO

USA

96.07%

Other

3.93%

VIOG

USA

96.81%

Other

3.19%

Sectors

IWO

Healthcare

29.4%

Technology

17.79%

Industrials

13.73%

Finance

13.29%

Other

25.79%

VIOG

Finance

23.11%

Industrials

16.86%

Healthcare

14.93%

Technology

12.77%

Other

32.34%

Diversification

IWO

Total weight of top 15 holdings out of 15

8.65%

VIOG

Total weight of top 15 holdings out of 15

14.17%

Top 15 holdings

Data as of July 31, 2026

IWO

Moog, Inc.

0.76%

BrightSpring Health Services, Inc.

0.76%

Glaukos Corp.

0.62%

Krystal Biotech, Inc.

0.61%

Brinker International, Inc.

0.58%

Crinetics Pharmaceuticals, Inc.

0.55%

HealthEquity, Inc.

0.55%

JFrog Ltd.

0.54%

Protagonist Therapeutics, Inc.

0.54%

StoneX Group, Inc.

0.54%

Ryman Hospitality Properties, Inc.

0.53%

FirstCash Holdings, Inc.

0.53%

ESCO Technologies, Inc.

0.53%

Argan, Inc.

0.51%

InterDigital, Inc.

0.50%

VIOG

Corcept Therapeutics, Inc.

1.24%

ViaSat, Inc.

1.18%

Brinker International, Inc.

1.04%

Ryman Hospitality Properties, Inc.

0.95%

FormFactor, Inc.

0.93%

Protagonist Therapeutics, Inc.

0.93%

ESCO Technologies, Inc.

0.92%

Alkermes Plc

0.92%

StoneX Group, Inc.

0.91%

Argan, Inc.

0.90%

Etsy, Inc.

0.88%

Federal Signal Corp.

0.86%

Zurn Elkay Water Solutions Corp.

0.85%

Armstrong World Industries, Inc.

0.84%

JBT Marel Corp.

0.81%

Frequently asked questions about IWO and VIOG

How have the IWO and VIOG ETFs performed in 2026?

As of September 11, 2026, IWO is up 13.91% year-to-date (YTD), while VIOG has returned 18.44%. That puts VIOG better performer ahead so far this year.

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

Year-to-date, the IWO ETF saw -$570M in flows, compared to +$77M for VIOG.

Which ETF is more volatile: IWO or VIOG?

Over the past year, IWO had a volatility of 22.37%, while VIOG experienced 17.38%.

Which ETF is bigger: IWO or VIOG?

As of September 11, 2026, IWO holds $14.39 B in assets under management (AUM), while VIOG manages $1.05 B.

What sectors do the IWO and VIOG ETFs invest in?

IWO leans toward sectors like Healthcare, Technology and Industrials. Meanwhile, VIOG focuses on Finance, Industrials and Healthcare.

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

IWO top holdings include Moog, Inc., BrightSpring Health Services, Inc. and Glaukos Corp.. VIOG holds in its top three: Corcept Therapeutics, Inc., ViaSat, Inc. and Brinker International, Inc..

IWOvsVIOGETF Comparison

iShares Russell 2000 Growth ETF

Vanguard S&P Small-Cap 600 Growth ETF

IWO vs VIOG 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 IWO and VIOG ETFs performed in 2026?

As of September 11, 2026, IWO is up 13.91% year-to-date (YTD), while VIOG has returned 18.44%. That puts VIOG better performer ahead so far this year.

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

Year-to-date, the IWO ETF saw -$570M in flows, compared to +$77M for VIOG.

Which ETF is more volatile: IWO or VIOG?

Over the past year, IWO had a volatility of 22.37%, while VIOG experienced 17.38%.

Which ETF is bigger: IWO or VIOG?

As of September 11, 2026, IWO holds $14.39 B in assets under management (AUM), while VIOG manages $1.05 B.

What sectors do the IWO and VIOG ETFs invest in?

IWO leans toward sectors like Healthcare, Technology and Industrials. Meanwhile, VIOG focuses on Finance, Industrials and Healthcare.

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

IWO top holdings include Moog, Inc., BrightSpring Health Services, Inc. and Glaukos Corp.. VIOG holds in its top three: Corcept Therapeutics, Inc., ViaSat, Inc. and Brinker International, Inc..

Which ETF is more diversified: IWO or VIOG?

IWO holds 1102 securities with 8.65% of its assets in the top 15. VIOG has 348 securities and a top 15 weight of 14.17%.

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