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MGKvsIWYETF Comparison

ETF 1

MGK

Vanguard Mega Cap Growth ETF

This fund is part of

US Large Cap Growth

+1.2%

Full MGK fund page

VS

ETF 2

IWY

iShares Russell Top 200 Growth ETF

This fund is part of

US Large Cap Growth

+1.2%

Full IWY fund page

Vanguard Mega Cap Growth ETF (MGK) and iShares Russell Top 200 Growth ETF (IWY) belong to the same industry segment: US Large Cap Growth. MGK's top 3 sector exposures are Technology, Consumer Non-Cyclicals and Healthcare. In contrast, IWY's top sector exposures are Technology, Industrials and Consumer Cyclicals. MGK is less expensive with a Total Expense Ratio (TER) of 0.05%, versus 0.2% for IWY. MGK is up 6.41% year-to-date (YTD) with -$1.36B in YTD flows. IWY performs worse with 2.79% YTD performance, and -$189M in YTD flows. Run a side-by-side ETF comparison of MGK and IWY 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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MGK vs IWY performance and flow charts

Performance

Cumulative Flows

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Data Services

Historic performance and flows

Data as of 07/21/2026

		1M	3M	YTD	1Y	3Y	5Y
Perf.	MGK IWY	+0.49%-0.34%	+6.59%+3.33%	+6.41%+2.79%	+17.04%+12.87%	+86.70%+79.28%	+89.35%+88.44%
Flows	MGK IWY	-$326M-$92M	-$355M-$347M	-$1.36B-$189M	+$82M+$248M	+$4.51B+$2.70B	+$6.87B+$5.32B

Volatility and drawdown

		3M	1Y	3Y	5Y
Volatility	MGK IWY	+20.04%+19.51%	+17.84%+17.31%	+20.22%+19.79%	+22.95%+21.85%
Max drawdown	MGK IWY	-8.41%-8.61%	-16.79%-16.56%	-23.44%-23.25%	-36.04%-32.74%
Max drawdown duration	MGK IWY	50d50d	187d190d	124d192d	745d715d

Trading data

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	MGK	IWY
Last sale 7/21/2026 at 1:30 PM	$87.66	$284.18
Previous close 07/21/2026	$86.83	$279.42
Consolidated volume 07/21/2026
Average volume 30 days
Average discount or premium 30 days
Average Bid/Ask spread 30 days

Replication quality

Data as of June 30, 2026

1-year trailing difference

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	MGK	IWY
Tracking error
Tracking difference
1 year cumulative return difference
Best
Worst
Daily return difference
Average
Worst

Main metrics

Last update 7/21/2026 at 1:30 PM

Live

Closed

	MGK	IWY
Last price	$87.66	$284.18
1D performance	+0.96%	+1.70%
AuM	$32.88 B	$16.48 B
E/R	0.05%	0.2%

Characteristics

	MGK	IWY
Management strategy	Passive	Passive
Provider	Vanguard	iShares
Benchmark	CRSP U.S. Mega Cap Growth Index	Russell Top 200 Growth Index
N° of holdings	55	101
Asset class	Equities	Equities
Trailing 12m distribution yield	Join	Join
Inception date	December 17, 2007	September 22, 2009
ESG	No	No

More MGK data on Trackinsight

More IWY data on Trackinsight

Exposure

Countries

MGK

USA

98.93%

Other

1.07%

IWY

USA

98.8%

Other

1.2%

Sectors

MGK

Technology

72.42%

Other

27.58%

IWY

Technology

71.2%

Industrials

7.19%

Other

21.6%

Diversification

MGK

Total weight of top 15 holdings out of 15

73.23%

IWY

Total weight of top 15 holdings out of 15

70.2%

Top 15 holdings

Data as of June 30, 2026

MGK

NVIDIA Corp.

13.21%

Apple, Inc.

12.12%

Microsoft Corp.

7.47%

Alphabet, Inc.

5.89%

Alphabet, Inc.

4.64%

Amazon.com, Inc.

4.44%

Broadcom Inc.

4.26%

Meta Platforms, Inc.

4.06%

Tesla, Inc.

3.91%

Eli Lilly & Co.

3.39%

Advanced Micro Devices, Inc.

3.18%

Lam Research Corp.

1.91%

Visa, Inc.

1.81%

KLA Corp.

1.47%

Mastercard, Inc.

1.46%

IWY

NVIDIA Corp.

14.16%

Apple, Inc.

7.14%

Alphabet, Inc.

6.37%

Broadcom Inc.

5.64%

Alphabet, Inc.

5.14%

Micron Technology, Inc.

4.87%

Tesla, Inc.

4.59%

Microsoft Corp.

4.56%

Meta Platforms, Inc.

3.68%

Eli Lilly & Co.

3.35%

Advanced Micro Devices, Inc.

3.25%

Applied Materials, Inc.

1.97%

Visa, Inc.

1.95%

Lam Research Corp.

1.86%

Caterpillar, Inc.

1.67%

Frequently asked questions about MGK and IWY

MGKvsIWYETF Comparison

Vanguard Mega Cap Growth ETF

iShares Russell Top 200 Growth ETF

MGK vs IWY 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 MGK and IWY ETFs performed in 2026?

As of July 21, 2026, MGK is up 6.41% year-to-date (YTD), while IWY has returned 2.79%. That puts MGK better performer ahead so far this year.

Which ETF is attracting more investor money: MGK or IWY?

Year-to-date, the MGK ETF saw -$1.36B in flows, compared to -$189M for IWY.

Which ETF is more volatile: MGK or IWY?

Over the past year, MGK had a volatility of 17.84%, while IWY experienced 17.31%.

Which ETF is bigger: MGK or IWY?

As of July 21, 2026, MGK holds $32.88 B in assets under management (AUM), while IWY manages $16.48 B.

What sectors do the MGK and IWY ETFs invest in?

MGK leans toward sectors like Technology. Meanwhile, IWY focuses on Technology and Industrials.

What are the top holdings of the MGK ETF and IWY ETF?

MGK top holdings include NVIDIA Corp., Apple, Inc. and Microsoft Corp.. IWY holds in its top three: NVIDIA Corp., Apple, Inc. and Alphabet, Inc..

Which ETF is more diversified: MGK or IWY?

MGK holds 56 securities with 73.23% of its assets in the top 15. IWY has 102 securities and a top 15 weight of 70.2%.

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