ETF comparison
IJK vs IWM
US Mid Cap vs US Small Cap.
iShares S&P Mid-Cap 400 Growth ETF · iShares Russell 2000 ETF
Holdings overlap
39 positions appear in both funds. Buying equal dollars of IJK and IWM would leave roughly 6.0% of each dollar exposed to the same underlying securities.
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.
Side by side
Sub-score comparison
Tracking quality isn't part of the composite — see what we don't score for why.
Cost difference
IJK is 3 bps cheaper than IWM. On a $100,000 position that's about $30/yr more in fees for IWM.
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 IJK vs IWM.
Top shared holdings
39 shared in total| # | Holding | In IJK | In IWM | Overlap |
|---|---|---|---|---|
| 1 | Moog, Inc. | 0.64% | 0.38% | 0.38% |
| 2 | Cytokinetics, Inc. | 0.33% | 0.35% | 0.33% |
| 3 | CareTrust REIT, Inc. | 0.50% | 0.28% | 0.28% |
| 4 | FirstCash Holdings, Inc. | 0.44% | 0.28% | 0.28% |
| 5 | EnerSys | 0.46% | 0.27% | 0.27% |
| 6 | HealthEquity, Inc. | 0.40% | 0.24% | 0.24% |
| 7 | Hims & Hers Health, Inc. | 0.39% | 0.23% | 0.23% |
| 8 | InterDigital, Inc. | 0.39% | 0.23% | 0.23% |
| 9 | Lantheus Holdings, Inc. | 0.26% | 0.22% | 0.22% |
| 10 | Ormat Technologies, Inc. | 0.35% | 0.21% | 0.21% |
| 11 | Silicon Laboratories, Inc. | 0.20% | 0.22% | 0.20% |
| 12 | GATX Corp. | 0.19% | 0.20% | 0.19% |
Only in IJK
204 total- Twilio, Inc. 1.66%
- Carpenter Technology Corp. 1.62%
- Curtiss-Wright Corp. 1.48%
- nVent Electric plc 1.45%
- ATI, Inc. 1.42%
- TechnipFMC plc 1.40%
- Sterling Infrastructure, Inc. 1.36%
- MasTec, Inc. 1.36%
- Woodward, Inc. 1.34%
- MACOM Technology Solutions Holdings, Inc. 1.32%
Only in IWM
1,975 total- Hut 8 Corp. 0.37%
- Viasat, Inc. 0.35%
- BrightSpring Health Services, 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%
- Krystal Biotech, Inc. 0.30%
- ESCO Technologies, Inc. 0.29%
Related comparisons
More comparisons with IJK
- IJK vs IWD · iShares Russell 1000 Value ETF 4.2%
- IJK vs ITOT · iShares Core S&P Total U.S. Stock Market ETF 3.4%
- IJK vs VTI · Vanguard Morningstar Total Stock Market ETF 3.4%
- IJK vs SCHB · Schwab U.S. Broad Market ETF 3.2%
- IJK vs DGRO · iShares Core Dividend Growth ETF 2.1%
- IJK vs IWF · iShares Russell 1000 Growth ETF 2.1%
More comparisons with IWM
- IWM vs SCHM · Schwab U.S. Mid-Cap ETF 5.0%
- IWM vs DFAU · Dimensional US Core Equity Market ETF 4.4%
- IWM vs IWV · iShares Russell 3000 ETF 4.3%
- IWM vs ITOT · iShares Core S&P Total U.S. Stock Market ETF 4.2%
- IWM vs VTI · Vanguard Morningstar Total Stock Market ETF 4.2%
- IWM vs ONEQ · Fidelity Nasdaq Composite Index ETF 4.1%
Percentages are holdings overlap with the named fund.
Open IJK or IWM at a brokerage
Both funds trade commission-free at major US brokerages.
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.