ETF comparison
IWM vs SPTM
US Small Cap vs US Total Market.
iShares Russell 2000 ETF · State Street SPDR Portfolio S&P 1500 Composite Stock Market ETF
Holdings overlap
621 positions appear in both funds. Buying equal dollars of IWM and SPTM would leave roughly 2.7% 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
SPTM is 16 bps cheaper than IWM. On a $100,000 position that's about $160/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 IWM vs SPTM.
Top shared holdings
621 shared in total| # | Holding | In IWM | In SPTM | Overlap |
|---|---|---|---|---|
| 1 | Moog, Inc. | 0.38% | 0.02% | 0.02% |
| 2 | Argan, Inc. | 0.34% | 0.02% | 0.02% |
| 3 | EnerSys | 0.27% | 0.01% | 0.01% |
| 4 | ESCO Technologies, Inc. | 0.29% | 0.01% | 0.01% |
| 5 | Krystal Biotech, Inc. | 0.30% | 0.01% | 0.01% |
| 6 | Cytokinetics, Inc. | 0.35% | 0.01% | 0.01% |
| 7 | MaxLinear, Inc. | 0.34% | 0.01% | 0.01% |
| 8 | FirstCash Holdings, Inc. | 0.28% | 0.01% | 0.01% |
| 9 | BrightSpring Health Services, Inc. | 0.35% | 0.01% | 0.01% |
| 10 | Plexus Corp. | 0.25% | 0.01% | 0.01% |
| 11 | Fluor Corp. | 0.23% | 0.01% | 0.01% |
| 12 | Alkermes plc | 0.27% | 0.01% | 0.01% |
Only in IWM
1,393 total- Hut 8 Corp. 0.37%
- JFrog Ltd. 0.31%
- Riot Platforms, Inc. 0.30%
- Compass, Inc. 0.27%
- D-Wave Quantum, Inc. 0.27%
- Praxis Precision Medicines, Inc. 0.26%
- Cipher Digital, Inc. 0.26%
- Core Scientific, Inc. 0.25%
- Vaxcyte, Inc. 0.24%
- Kymera Therapeutics, Inc. 0.22%
Only in SPTM
887 total- NVIDIA Corp 6.92%
- Apple Inc 6.07%
- Microsoft Corp 3.96%
- Amazon.com Inc 3.33%
- Alphabet Inc 2.99%
- Broadcom Inc 2.56%
- Alphabet Inc 2.38%
- Micron Technology Inc 1.86%
- Meta Platforms Inc 1.76%
- Tesla Inc 1.69%
Related comparisons
More comparisons with IWM
- IWM vs AVMV · Avantis U.S. Mid Cap Value ETF 2.6%
- IWM vs VYM · Vanguard High Dividend Yield Index Fund ETF Shares 2.6%
- IWM vs FVD · First Trust Value Line Dividend Index Fund 2.4%
- IWM vs ESGV · Vanguard ESG U.S. Stock ETF 2.4%
- IWM vs FNDX · Schwab Fundamental U.S. Large Company ETF 2.3%
- IWM vs AVLV · Avantis US Large Cap Value ETF 1.6%
More comparisons with SPTM
- SPTM vs IJR · iShares Core S&P Small-Cap ETF 2.5%
- SPTM vs ITOT · iShares Core S&P Total U.S. Stock Market ETF 95.2%
- SPTM vs VTI · Vanguard Morningstar Total Stock Market ETF 94.9%
- SPTM vs IWV · iShares Russell 3000 ETF 94.8%
- SPTM vs SCHB · Schwab U.S. Broad Market ETF 92.6%
- SPTM vs VOO · Vanguard S&P 500 ETF 92.1%
Percentages are holdings overlap with the named fund.
Open IWM or SPTM 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.