ETF comparison
IWM vs IWN
Both US Small Cap.
Holdings overlap
1,420 positions appear in both funds. Buying equal dollars of IWM and IWN would leave roughly 53.6% 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
IWM is 5 bps cheaper than IWN. On a $100,000 position that's about $50/yr more in fees for IWN.
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 IWN.
Top shared holdings
1,420 shared in total| # | Holding | In IWM | In IWN | Overlap |
|---|---|---|---|---|
| 1 | Hut 8 Corp. | 0.37% | 0.36% | 0.36% |
| 2 | Viasat, Inc. | 0.35% | 0.74% | 0.35% |
| 3 | Cytokinetics, Inc. | 0.35% | 0.65% | 0.35% |
| 4 | UMB Financial Corp. | 0.33% | 0.62% | 0.33% |
| 5 | CareTrust REIT, Inc. | 0.28% | 0.59% | 0.28% |
| 6 | Old National Bancorp | 0.28% | 0.52% | 0.28% |
| 7 | Terex Corp. | 0.26% | 0.54% | 0.26% |
| 8 | JBT Marel Corp. | 0.24% | 0.50% | 0.24% |
| 9 | Fluor Corp. | 0.23% | 0.34% | 0.23% |
| 10 | Lumen Technologies, Inc. | 0.23% | 0.48% | 0.23% |
| 11 | Arcosa, Inc. | 0.22% | 0.32% | 0.22% |
| 12 | Valley National Bancorp | 0.22% | 0.34% | 0.22% |
Only in IWM
594 total- Moog, Inc. 0.38%
- BrightSpring Health Services, Inc. 0.35%
- MaxLinear, Inc. 0.34%
- Argan, Inc. 0.34%
- JFrog Ltd. 0.31%
- Krystal Biotech, Inc. 0.30%
- ESCO Technologies, Inc. 0.29%
- FirstCash Holdings, Inc. 0.28%
- D-Wave Quantum, Inc. 0.27%
- StoneX Group, Inc. 0.27%
Only in IWN
2 total- N/A 0.00%
- GD Culture Group Ltd. 0.00%
Related comparisons
More comparisons with IWM
- IWM vs DFAS · U.S. Small Cap Portfolio-ETF Class Shares 50.7%
- IWM vs SPSM · State Street SPDR Portfolio S&P 600 Small Cap ETF 47.1%
- IWM vs IJR · iShares Core S&P Small-Cap ETF 46.8%
- IWM vs VIOO · Vanguard S&P Small-Cap 600 Index Fund ETF Shares 46.0%
- IWM vs FNDA · Schwab Fundamental U.S. Small Company ETF 38.1%
- IWM vs DFAT · U.S. Targeted Value Portfolio-ETF Class Shares 33.7%
More comparisons with IWN
- IWN vs VTWO · Vanguard Russell 2000 Index Fund ETF Shares 45.4%
- IWN vs DFSV · DFA U.S. Small Cap Value Portfolio – ETF Class Shares 45.2%
- IWN vs SPSM · State Street SPDR Portfolio S&P 600 Small Cap ETF 43.5%
- IWN vs VIOO · Vanguard S&P Small-Cap 600 Index Fund ETF Shares 43.5%
- IWN vs IJR · iShares Core S&P Small-Cap ETF 42.5%
- IWN vs IJS · iShares S&P Small-Cap 600 Value ETF 40.1%
Percentages are holdings overlap with the named fund.
Open IWM or IWN 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.