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ETF comparison

IWM vs IWS

US Small Cap vs US Mid Cap.

iShares Russell 2000 ETF · iShares Russell Mid-Cap Value ETF

Holdings overlap

Weighted by ISIN/CUSIP
0.0 %

0 positions appear in both funds. Buying equal dollars of IWM and IWS would leave roughly 0.0% of each dollar exposed to the same underlying securities.

IWM unmatched 99.8% Shared 0.0% IWS unmatched 99.9%

Unmatched is the part of a fund's weight the other fund doesn't match: names only it holds, plus any extra weight it puts in names both funds hold.

In IWM only
2,014 positions
Shared
0 positions
In IWS only
720 positions

Side by side

IWM

iShares Russell 2000 ETF

iShares · US Small Cap

90 composite / 100
Expense ratio
0.19%
Net assets
$78.04B
TTM yield
0.99%
Top-10 conc.
3.4%
IWS

iShares Russell Mid-Cap Value ETF

iShares · US Mid Cap

88 composite / 100
Expense ratio
0.23%
Net assets
$14.78B
TTM yield
1.31%
Top-10 conc.
7.1%

Sub-score comparison

81
Cost
77
89
Tax efficiency
88
100
Liquidity
100
100
Concentration
100
—
Tracking quality
—
IWM sub-score IWS

Tracking quality isn't part of the composite — see what we don't score for why.

Cost difference

IWM is 4 bps cheaper than IWS. On a $100,000 position that's about $40/yr more in fees for IWS.

Fee figure is the annual expense charged on $100,000. To see how the gap compounds over a multi-decade holding period, open the cost calculator pre-filled with IWM vs IWS.

Top shared holdings

0 shared in total

No shared holdings between these funds.

Only in IWM

2,014 total
  • Moog, Inc. 0.38%
  • Hut 8 Corp. 0.37%
  • Viasat, Inc. 0.35%
  • BrightSpring Health Services, Inc. 0.35%
  • Cytokinetics, Inc. 0.35%
  • MaxLinear, Inc. 0.34%
  • Argan, Inc. 0.34%
  • UMB Financial Corp. 0.33%
  • JFrog Ltd. 0.31%
  • Riot Platforms, Inc. 0.30%

Only in IWS

720 total
  • WARNER BROS. DISCOVERY INC 0.63%
  • PHILLIPS 66 0.62%
  • DIGITAL REALTY TRUST INC 0.62%
  • KINDER MORGAN INC 0.61%
  • ALLSTATE CORP (THE) 0.60%
  • HEWLETT PACKARD ENTERPRISE COMPANY 0.59%
  • FLEX LTD 0.58%
  • REALTY INCOME CORP 0.57%
  • DELTA AIR LINES INC 0.56%
  • CORTEVA INC 0.56%

Related comparisons

More comparisons with IWM

More comparisons with IWS

Percentages are holdings overlap with the named fund.

Open IWM or IWS at a brokerage

Both funds trade commission-free at major US brokerages.

Open at Fidelity

Affiliate links — opening an account through these earns PlainIndex a one-time referral. Scoring is computed before any affiliate consideration; see our methodology and funding disclosure.

Holdings overlap is the sum of min(weight_a, weight_b) over positions matched on ISIN (CUSIP fallback). Methodology: see /methodology/.

Comparing two funds doesn't endorse swapping one for the other. Tax-lot history, account type, and personal goals matter — PlainIndex publishes data and methodology, not investment advice.