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MIDvsIWPETF Comparison

ETF 1

MID

American Century Mid Cap Growth Impact ETF

This fund is part of

US Mid Cap Growth

+0.17%

Full MID fund page

VS

ETF 2

IWP

iShares Russell Mid-Cap Growth ETF

This fund is part of

US Mid Cap Growth

+0.17%

Full IWP fund page

American Century Mid Cap Growth Impact ETF (MID) and iShares Russell Mid-Cap Growth ETF (IWP) belong to the same industry segment: US Mid Cap Growth. MID's top 3 sector exposures are Industrials, Information Technology and Health Care. In contrast, IWP's top sector exposures are Industrials, Consumer Discretionary and Information Technology. MID is more expensive with a Total Expense Ratio (TER) of 0.45%, versus 0.23% for IWP. MID is down -1.01% year-to-date (YTD) with -$4M in YTD flows. IWP performs better with -0.44% YTD performance, and -$836M in YTD flows. Run a side-by-side ETF comparison of MID and IWP 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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MID vs IWP 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 04/29/2026

		1M	3M	YTD	1Y	3Y	5Y
Perf.	MID IWP	+8.96%+5.74%	-3.63%+0.07%	-1.01%-0.44%	+11.67%+12.15%	+45.74%+53.57%	+22.41%+30.45%
Flows	MID IWP	+$951K-$265M	+$574K-$397M	-$4M-$836M	+$7M+$512M	+$32M+$1.41B	+$59M+$575M

Volatility and drawdown

		3M	1Y	3Y	5Y
Volatility	MID IWP	+22.13%+22.19%	+17.62%+17.55%	+19.96%+19.43%	+24.00%+22.45%
Max drawdown	MID IWP	-11.55%-10.49%	-14.34%-14.82%	-23.84%-25.34%	-40.04%-38.70%
Max drawdown duration	MID IWP	90d50d	184d186d	154d134d	1060d1059d

Trading data

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	MID	IWP
Last sale 5/1/2026 at 1:30 PM	$66.10	$136.16
Previous close 04/29/2026	$65.89	$136.31
Consolidated volume 04/29/2026
Average volume 30 days
Average discount or premium 30 days
Average Bid/Ask spread 30 days

Replication quality

Data as of April 30, 2026

1-year trailing difference

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MID

is actively managed and doesn’t replicate an index

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	MID	IWP
Tracking error
Tracking difference
1 year cumulative return difference
Best
Worst
Daily return difference
Average
Worst

Main metrics

Last update 5/1/2026 at 1:30 PM

Live

Closed

	MID	IWP
Last price	$66.10	$136.16
1D performance	+0.32%	-0.11%
AuM	$91.18 M	$19.57 B
E/R	0.45%	0.23%

Characteristics

	MID	IWP
Management strategy	Active	Passive
Provider	American Century Investments	iShares
Benchmark	-	Russell Midcap Growth Index
N° of holdings	34	242
Asset class	-	Equities
Trailing 12m distribution yield	Join	Join
Inception date	July 15, 2020	July 17, 2001
ESG	Yes	No

More MID data on Trackinsight

More IWP data on Trackinsight

Exposure

Countries

MID

USA

79.4%

Other

20.6%

IWP

USA

93.51%

Other

6.49%

Sectors

MID

Industrials

22.13%

Information Techn.

21.82%

Health Care

15.25%

Consumer Discreti.

11.99%

Energy

7.12%

Other

21.69%

IWP

Industrials

20.24%

Consumer Discreti.

20.16%

Information Techn.

17.63%

Health Care

14.62%

Other

27.34%

Diversification

MID

Total weight of top 15 holdings out of 15

60.89%

IWP

Total weight of top 15 holdings out of 15

31.92%

Top 15 holdings

Data as of March 31, 2026

MID

CLOUDFLARE INC

6.85%

MONOLITHIC POWER SYSTEMS

6.34%

JOHNSON CONTROLS INTERNATIONAL

5.84%

TARGA RESOURCS

4.90%

TRACTOR SUPPLY

4.54%

VISTRA CORP

4.29%

CADENCE DESIGN SYSTEMS

3.96%

WESCO INTL

3.93%

VERTIV HOLDINGS

3.33%

MSCI

3.31%

HUBBELL

3.06%

REPUBLIC SVCS

2.89%

TOPBUILD CORP

2.64%

ALNYLAM PHARMACEUTICALS

2.60%

ZSCALER INC

2.41%

IWP

VERTIV HOLDINGS

3.43%

HOWMET AEROSPACE INC

3.32%

ROYAL CARIBBEAN GROUP

2.51%

HILTON INC

2.49%

CLOUDFLARE INC

2.33%

QUANTA SERVICES

2.25%

AMERISOURCEBERGEN

2.07%

TARGA RESOURCS

1.92%

VISTRA CORP

1.83%

MONOLITHIC POWER SYSTEMS

1.82%

COMFORT SYSTEMS USA

1.73%

IDEXX LABORATORIES

1.61%

FASTENAL

1.57%

CARVANA CO

1.53%

ALNYLAM PHARMACEUTICALS

1.51%

Frequently asked questions about MID and IWP

How have the MID and IWP ETFs performed in 2026?

As of April 29, 2026, MID is down -1.01% year-to-date (YTD), while IWP has lost -0.44%. That puts IWP better performer ahead so far this year.

Which ETF is attracting more investor money: MID or IWP?

Year-to-date, the MID ETF saw -$4M in flows, compared to -$836M for IWP.

Which ETF is more volatile: MID or IWP?

Over the past year, MID had a volatility of 17.62%, while IWP experienced 17.55%.

Which ETF is bigger: MID or IWP?

As of April 29, 2026, MID holds $91.18 M in assets under management (AUM), while IWP manages $19.57 B.

What sectors do the MID and IWP ETFs invest in?

MID leans toward sectors like Industrials, Information Technology and Health Care. Meanwhile, IWP focuses on Industrials, Consumer Discretionary and Information Technology.

What are the top holdings of the MID ETF and IWP ETF?

MID top holdings include CLOUDFLARE INC, MONOLITHIC POWER SYSTEMS and JOHNSON CONTROLS INTERNATIONAL. IWP holds in its top three: VERTIV HOLDINGS, HOWMET AEROSPACE INC and ROYAL CARIBBEAN GROUP.

MIDvsIWPETF Comparison

American Century Mid Cap Growth Impact ETF

iShares Russell Mid-Cap Growth ETF

MID vs IWP 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 MID and IWP ETFs performed in 2026?

As of April 29, 2026, MID is down -1.01% year-to-date (YTD), while IWP has lost -0.44%. That puts IWP better performer ahead so far this year.

Which ETF is attracting more investor money: MID or IWP?

Year-to-date, the MID ETF saw -$4M in flows, compared to -$836M for IWP.

Which ETF is more volatile: MID or IWP?

Over the past year, MID had a volatility of 17.62%, while IWP experienced 17.55%.

Which ETF is bigger: MID or IWP?

As of April 29, 2026, MID holds $91.18 M in assets under management (AUM), while IWP manages $19.57 B.

What sectors do the MID and IWP ETFs invest in?

MID leans toward sectors like Industrials, Information Technology and Health Care. Meanwhile, IWP focuses on Industrials, Consumer Discretionary and Information Technology.

What are the top holdings of the MID ETF and IWP ETF?

MID top holdings include CLOUDFLARE INC, MONOLITHIC POWER SYSTEMS and JOHNSON CONTROLS INTERNATIONAL. IWP holds in its top three: VERTIV HOLDINGS, HOWMET AEROSPACE INC and ROYAL CARIBBEAN GROUP.

Which ETF is more diversified: MID or IWP?

MID holds 34 securities with 60.89% of its assets in the top 15. IWP has 278 securities and a top 15 weight of 31.92%.

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