ETF comparison
IWM vs IWN
Both US Small Cap.
Holdings overlap
1,405 positions appear in both funds. Buying equal dollars of IWM and IWN would leave roughly 63.3% of each dollar exposed to the same underlying securities.
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
1,405 shared in total| # | Holding | In IWM | In IWN | Overlap |
|---|---|---|---|---|
| 1 | BlackRock Funds III | 14.24% | 8.04% | 8.04% |
| 2 | Coeur Mining, Inc. | 0.65% | 0.66% | 0.65% |
| 3 | EchoStar Corp. | 0.54% | 1.09% | 0.54% |
| 4 | Hecla Mining Co. | 0.40% | 0.62% | 0.40% |
| 5 | TTM Technologies, Inc. | 0.34% | 0.69% | 0.34% |
| 6 | American Healthcare REIT, Inc. | 0.29% | 0.38% | 0.29% |
| 7 | Praxis Precision Medicines, Inc. | 0.28% | 0.53% | 0.28% |
| 8 | CareTrust REIT, Inc. | 0.28% | 0.51% | 0.28% |
| 9 | UMB Financial Corp. | 0.28% | 0.52% | 0.28% |
| 10 | Cytokinetics, Inc. | 0.27% | 0.48% | 0.27% |
| 11 | SM Energy Co. | 0.26% | 0.54% | 0.26% |
| 12 | Old National Bancorp | 0.26% | 0.47% | 0.26% |
Only in IWM
539 total- Bloom Energy Corp. 1.01%
- Fabrinet 0.64%
- Credo Technology Group Holding Ltd. 0.51%
- Kratos Defense & Security Solutions, Inc. 0.43%
- Advanced Energy Industries, Inc. 0.41%
- Sterling Infrastructure, Inc. 0.41%
- Bridgebio Pharma, Inc. 0.40%
- Guardant Health, Inc. 0.39%
- Modine Manufacturing Co. 0.39%
- Ensign Group, Inc. (The) 0.38%
Only in IWN
4 total- Logistic Properties of The Americas 0.00%
- flyExclusive, Inc. 0.00%
- N/A 0.00%
- Arrive AI, Inc. 0.00%
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.