DFAS vs IWR: Holdings Overlap
DFASDimensional U.S. Small Cap ETF
Dimensional · 2121 holdings · $15.3B · as of 2026-04-30
IWRiShares Russell Mid-Cap ETF
iShares · 806 holdings · $57.6B · as of 2026-03-31
Holdings snapshots are 30 days apart (DFAS: 2026-04-30, IWR: 2026-03-31). Weights and index membership change between snapshots, so the true current overlap is typically higher than shown. For funds tracking the same index, the gap can be 5–15 points.
How similar are DFAS and IWR?
Dimensional U.S. Small Cap ETF (DFAS, by Dimensional) holds 2121 positions; iShares Russell Mid-Cap ETF (IWR, by iShares) holds 806. They have 394 holdings in common, and by portfolio weight the two funds are 17.9% identical. In practical terms the pair is lightly overlapping, with most of each portfolio distinct.
- Overlap by Weight
- 17.9%Sum of the smaller weight of each shared holding
- Shared Holdings
- 394DFAS holds 2121 · IWR holds 806
- Weight in Shared Holdings
- DFAS 41%·IWR 21%Share of each fund's weight in stocks both funds own
Based on each fund's latest official holdings. How is this calculated?
What makes each fund different
Only in DFAS
1727 of 2121 positions (58.5% of the fund) are not held by IWR. Showing the top 30 by weight.
Sector Breakdown
| Sector | DFAS | IWR |
|---|---|---|
| Industrials | 20.6% | 18.7% |
| Financials | 19.2% | 13.6% |
| Information Technology | 12.0% | 13.0% |
| Consumer Discretionary | 12.4% | 10.8% |
| Health Care | 11.1% | 9.2% |
| Other Sectors | 21.9% | 34.3% |
| Unclassified | 2.7% | 0.1% |
Share of each fund's portfolio weight by GICS-style sector, compiled from issuer fund data and our own classification of the holdings, not the issuers' published sector charts. “Unclassified” is weight we could not classify (3% of DFAS, 0% of IWR).
Performance
| Fund | 1M | YTD | 1Y | 3Y (ann.) | 5Y (ann.) | 10Y (ann.) | Yield |
|---|---|---|---|---|---|---|---|
| DFAS | +3.2% | +20.5% | +31.3% | +14.8% | +9.1% | — | 0.95% |
| IWR | +2.9% | +18.1% | +23.0% | +16.4% | +8.5% | +11.6% | 1.12% |
Total returns including dividends, from adjusted daily closes as of 2026-08-07. 3Y/5Y/10Y are annualized. Yield is trailing-12-month distributions over the last close. Past performance does not predict future results.
Project the growth of $10,000 in DFAS vs IWR →
Shared Holdings(394)
The top 10 shared positions account for 7% of the overlap, led by ALB, NVT and AA.
 ALBAlbemarle Corp COM | 0.15% | 0.17% | 0.15% |
|---|---|---|---|
 NVTNVent Electric PLC COM USD0.01 | 0.14% | 0.15% | 0.14% |
 AAAlcoa Corporation COM | 0.22% | 0.14% | 0.14% |
 OVVOvintiv Inc COM | 0.20% | 0.14% | 0.14% |
 VTRSViatris Inc COM | 0.12% | 0.12% | 0.12% |
 APAAPA Corp. COM | 0.25% | 0.12% | 0.12% |
 HIIHuntington Ingalls Industries, Inc. COM | 0.21% | 0.12% | 0.12% |
 PRPermian Resources Corporation Class A | 0.21% | 0.12% | 0.12% |
 DTMDT Midstream Inc COMMON STOCK | 0.22% | 0.11% | 0.11% |
 NYTNew York Times Co. (The), Class A | 0.22% | 0.11% | 0.11% |
 HASHasbro Inc COM | 0.22% | 0.10% | 0.10% |
 WCCWesco International, Inc. COM | 0.29% | 0.10% | 0.10% |
 PNFPPinnacle Financial Partners Inc. COM | 0.23% | 0.10% | 0.10% |
 PENPenumbra Inc. COM | 0.14% | 0.10% | 0.10% |
 RRXRegal Rexnord Corporation COM | 0.17% | 0.10% | 0.10% |
 ARAntero Resources Corporation COM | 0.15% | 0.10% | 0.10% |
 FIVEFive Below Inc COM | 0.18% | 0.10% | 0.10% |
 MLIMueller Industries Inc. COM | 0.20% | 0.10% | 0.10% |
 PNWPinnacle West Capital Corp. COM | 0.17% | 0.10% | 0.10% |
 ROIVRoivant Sciences Ltd SHS | 0.12% | 0.09% | 0.09% |
 ELANElanco Animal Health Inc COM | 0.21% | 0.09% | 0.09% |
 CACICACI International, Inc., Class A | 0.15% | 0.09% | 0.09% |
 CCKCrown Holdings Inc COM | 0.10% | 0.09% | 0.09% |
 ALGNAlign Technology Inc. COM | 0.11% | 0.09% | 0.09% |
 LSCCLattice Semiconductor Corporation COM | 0.09% | 0.10% | 0.09% |
Showing the top 250 of 394 shared holdings by overlap weight.
Frequently Asked Questions
How much do DFAS and IWR overlap?
DFAS and IWR overlap by 17.9% of portfolio weight. They share 394 holdings (DFAS holds 2121 positions and IWR holds 806), based on each fund's latest SEC-reported holdings.
Is it redundant to own both DFAS and IWR?
The two portfolios are 17.9% identical by weight. Owning both is not redundant. Most of each portfolio is distinct, so the funds can serve different roles.
What are the biggest shared holdings of DFAS and IWR?
The largest positions held by both funds are ALB, NVT, AA, OVV and VTRS. Together the top 10 shared positions account for 7% of the total overlap.
What does DFAS own that IWR doesn't?
1727 positions (58.5% of DFAS) are unique to DFAS, led by TTMI, AEIS and MOD. In the other direction, 412 positions (78.3% of IWR) are unique to IWR.