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MMIDvsIWRETF Comparison

ETF 1

MMID

MFS Active Mid Cap ETF

This fund is part of

Uncategorized Equities

+0.6%

Full MMID fund page

VS

ETF 2

IWR

iShares Russell Mid-Cap ETF

This fund is part of

US Mid Cap

+0.07%

Full IWR fund page

MFS Active Mid Cap ETF (MMID) belongs to the Uncategorized Equities segment. iShares Russell Mid-Cap ETF (IWR) is part of the US Mid Cap segment. Both ETFs have the same top 3 sector exposures: Industrials, Information Technology and Financials. MMID is more expensive with a Total Expense Ratio (TER) of 0.59%, versus 0.18% for IWR. MMID is up 3.01% year-to-date (YTD) with +$565K in YTD flows. IWR performs better with 8.08% YTD performance, and +$1.99B in YTD flows. Run a side-by-side ETF comparison of MMID and IWR 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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MMID vs IWR 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 04/24/2026

		1M	3M	YTD	1Y	3Y	5Y
Perf.	MMID IWR	+4.37%+6.47%	-0.90%+3.56%	+3.01%+8.08%	n/a+26.08%	n/a+54.86%	n/a+41.73%
Flows	MMID IWR	+$64K+$1.41B	+$560K+$2.41B	+$565K+$1.99B	-+$4.28B	-+$9.68B	-+$11.54B

Volatility and drawdown

		3M	1Y	3Y	5Y
Volatility	MMID IWR	+15.02%+16.22%	n/a+13.91%	n/a+16.02%	n/a+18.27%
Max drawdown	MMID IWR	-7.98%-8.16%	n/a-8.16%	n/a-21.08%	n/a-26.20%
Max drawdown duration	MMID IWR	75d49d	n/a49d	n/a239d	n/a854d

Trading data

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	MMID	IWR
Last sale 4/27/2026 at 1:30 PM	$25.71	$103.75
Previous close 04/24/2026	$25.73	$103.76
Consolidated volume 04/24/2026
Average volume 30 days
Average discount or premium 30 days
Average Bid/Ask spread 30 days

Replication quality

Data as of March 31, 2026

1-year trailing difference

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MMID

is actively managed and doesn’t replicate an index

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	MMID	IWR
Tracking error
Tracking difference
1 year cumulative return difference
Best
Worst
Daily return difference
Average
Worst

Main metrics

Last update 4/27/2026 at 1:30 PM

Live

Closed

	MMID	IWR
Last price	$25.71	$103.75
1D performance	-0.07%	-0.01%
AuM	$33.68 M	$52.10 B
E/R	0.59%	0.18%

Characteristics

	MMID	IWR
Management strategy	Active	Passive
Provider	MFS	iShares
Benchmark	-	Russell Midcap Index
N° of holdings	87	721
Asset class	-	Equities
Trailing 12m distribution yield	Join	Join
Inception date	September 24, 2025	July 17, 2001
ESG	No	No

More MMID data on Trackinsight

More IWR data on Trackinsight

Exposure

Countries

MMID

USA

80.22%

Other

19.78%

IWR

USA

93.69%

Other

6.31%

Sectors

MMID

Industrials

16.9%

Information Techn.

12.45%

Financials

11.78%

Consumer Discreti.

8.03%

Utilities

7.5%

Health Care

7.38%

Other

35.96%

IWR

Industrials

16.54%

Information Techn.

13.04%

Financials

12.07%

Consumer Discreti.

10.57%

Health Care

8.39%

Energy

7.34%

Other

32.04%

Diversification

MMID

Total weight of top 15 holdings out of 15

21.89%

IWR

Total weight of top 15 holdings out of 15

9.59%

Top 15 holdings

Data as of March 31, 2026

MMID

CHENIERE ENERGY

1.86%

DIAMONDBACK ENERGY

1.78%

ROSS STORES

1.65%

WABTEC

1.54%

BURLINGTON STORES

1.47%

NVENT ELECTRIC PLC

1.45%

ALLIANT ENERGY

1.41%

ELEMENT SOLUTIONS INC

1.39%

LITTELFUSE

1.39%

US71424F1057

1.35%

WW GRAINGER

1.34%

PPL

1.33%

AMEREN

1.31%

NORDSON

1.31%

GLOBL PAYMNTS

1.31%

IWR

CORNING

0.84%

VERTIV HOLDINGS

0.76%

HOWMET AEROSPACE INC

0.73%

WESTERN DIGITAL

0.73%

US80004C2008

0.72%

BANK OF NEW YORK MELLON

0.65%

QUANTA SERVICES

0.64%

VALERO ENERGY

0.60%

CUMMINS

0.59%

MARATHON PETROLEUM

0.58%

PHILLIPS 66

0.58%

ROYAL CARIBBEAN GROUP

0.55%

HILTON INC

0.55%

ROSS STORES

0.55%

KINDER MORGAN

0.52%

Frequently asked questions about MMID and IWR

How have the MMID and IWR ETFs performed in 2026?

As of April 24, 2026, MMID is up 3.01% year-to-date (YTD), while IWR has returned 8.08%. That puts IWR better performer ahead so far this year.

Which ETF is attracting more investor money: MMID or IWR?

Year-to-date, the MMID ETF saw +$565K in flows, compared to +$1.99B for IWR.

Which ETF is bigger: MMID or IWR?

As of April 24, 2026, MMID holds $33.68 M in assets under management (AUM), while IWR manages $52.10 B.

What sectors do the MMID and IWR ETFs invest in?

MMID leans toward sectors like Industrials, Information Technology and Financials. Meanwhile, IWR focuses on Industrials, Information Technology and Financials.

What are the top holdings of the MMID ETF and IWR ETF?

MMID top holdings include CHENIERE ENERGY, DIAMONDBACK ENERGY and ROSS STORES. IWR holds in its top three: CORNING, VERTIV HOLDINGS and HOWMET AEROSPACE INC.

MMIDvsIWRETF Comparison

MFS Active Mid Cap ETF

iShares Russell Mid-Cap ETF

MMID vs IWR 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 MMID and IWR ETFs performed in 2026?

As of April 24, 2026, MMID is up 3.01% year-to-date (YTD), while IWR has returned 8.08%. That puts IWR better performer ahead so far this year.

Which ETF is attracting more investor money: MMID or IWR?

Year-to-date, the MMID ETF saw +$565K in flows, compared to +$1.99B for IWR.

Which ETF is bigger: MMID or IWR?

As of April 24, 2026, MMID holds $33.68 M in assets under management (AUM), while IWR manages $52.10 B.

What sectors do the MMID and IWR ETFs invest in?

MMID leans toward sectors like Industrials, Information Technology and Financials. Meanwhile, IWR focuses on Industrials, Information Technology and Financials.

What are the top holdings of the MMID ETF and IWR ETF?

MMID top holdings include CHENIERE ENERGY, DIAMONDBACK ENERGY and ROSS STORES. IWR holds in its top three: CORNING, VERTIV HOLDINGS and HOWMET AEROSPACE INC.

Which ETF is more diversified: MMID or IWR?

MMID holds 90 securities with 21.89% of its assets in the top 15. IWR has 806 securities and a top 15 weight of 9.59%.

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