DFAU vs IWB: Holdings Overlap
DFAUDimensional US Core Equity Market ETF
Dimensional · 2190 holdings · $12.4B · as of 2026-04-30
iShares · 1005 holdings · $49.9B · as of 2026-03-31
Holdings snapshots are 30 days apart (DFAU: 2026-04-30, IWB: 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 DFAU and IWB?
Dimensional US Core Equity Market ETF (DFAU, by Dimensional) holds 2190 positions; iShares Russell 1000 ETF (IWB, by iShares) holds 1005. They have 884 holdings in common, and by portfolio weight the two funds are 87.5% identical. In practical terms the pair is essentially interchangeable, so holding both adds little diversification.
- Overlap by Weight
- 87.5%Sum of the smaller weight of each shared holding
- Shared Holdings
- 884DFAU holds 2190 · IWB holds 1005
- Weight in Shared Holdings
- DFAU 94%·IWB 97%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 DFAU
1306 of 2190 positions (5.5% of the fund) are not held by IWB. Showing the top 30 by weight.
Sector Breakdown
| Sector | DFAU | IWB |
|---|---|---|
| Information Technology | 31.7% | 30.9% |
| Financials | 13.0% | 12.9% |
| Industrials | 11.0% | 9.9% |
| Consumer Discretionary | 10.5% | 10.0% |
| Communication Services | 10.4% | 10.2% |
| Other Sectors | 23.0% | 26.0% |
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.
Performance
| Fund | 1M | YTD | 1Y | 3Y (ann.) | 5Y (ann.) | 10Y (ann.) | Yield |
|---|---|---|---|---|---|---|---|
| DFAU | +3.5% | +14.9% | +24.8% | +20.5% | +12.9% | — | 0.88% |
| IWB | +3.4% | +13.9% | +23.1% | +20.9% | +12.6% | +15.0% | 0.89% |
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 DFAU vs IWB →
Shared Holdings(884)
The top 10 shared positions account for 37% of the overlap, led by NVDA, AAPL and MSFT.
 NVDANVIDIA Corp. COM | 6.83% | 6.81% | 6.81% |
|---|---|---|---|
 AAPLApple Inc. COM | 5.76% | 6.10% | 5.76% |
 MSFTMicrosoft Corp. COM | 4.62% | 4.58% | 4.58% |
 AMZNAmazon.com, Inc. COM | 3.66% | 3.33% | 3.33% |
 GOOGLAlphabet Inc. CAP STK CL A | 3.06% | 2.79% | 2.79% |
 AVGOBroadcom Inc COM | 2.58% | 2.39% | 2.39% |
 GOOGAlphabet Inc. CAP STK CL C | 2.53% | 2.27% | 2.27% |
 METAMeta Platforms, Inc., Class A | 2.03% | 2.08% | 2.03% |
 TSLATesla Inc COM | 1.52% | 1.75% | 1.52% |
 JPMJPMorgan Chase & Co. COM | 1.20% | 1.33% | 1.20% |
 BRK-BBerkshire Hathaway, Inc., Class B | 1.07% | 1.47% | 1.07% |
 LLYEli Lilly & Co. COM | 1.06% | 1.23% | 1.06% |
 XOMExxon Mobil Corp. COM | 0.92% | 1.20% | 0.92% |
 VVisa, Inc., Class A | 0.71% | 0.85% | 0.71% |
 WMTWalmart Inc COM | 0.70% | 0.90% | 0.70% |
 JNJJohnson & Johnson COM | 0.67% | 0.98% | 0.67% |
 MUMicron Technology Inc. COM | 0.94% | 0.63% | 0.63% |
 MAMasterCard Incorporated CL A | 0.60% | 0.67% | 0.60% |
 CATCaterpillar Inc COM | 0.56% | 0.55% | 0.55% |
 AMDAdvanced Micro Devices Inc. COM | 0.62% | 0.55% | 0.55% |
 COSTCostco Wholesale Corporation COM | 0.53% | 0.74% | 0.53% |
 PGThe Procter & Gamble Co. COM | 0.53% | 0.57% | 0.53% |
 NFLXNetflix, Inc. COM | 0.50% | 0.68% | 0.50% |
 CVXChevron Corp. COM | 0.48% | 0.65% | 0.48% |
 ABBVAbbVie Inc. COM | 0.48% | 0.64% | 0.48% |
Showing the top 250 of 884 shared holdings by overlap weight.
Frequently Asked Questions
How much do DFAU and IWB overlap?
DFAU and IWB overlap by 87.5% of portfolio weight. They share 884 holdings (DFAU holds 2190 positions and IWB holds 1005), based on each fund's latest SEC-reported holdings.
Is it redundant to own both DFAU and IWB?
The two portfolios are 87.5% identical by weight. Owning both is largely redundant: they are close to the same portfolio, so a second position mostly duplicates the first.
What are the biggest shared holdings of DFAU and IWB?
The largest positions held by both funds are NVDA, AAPL, MSFT, AMZN and GOOGL. Together the top 10 shared positions account for 37% of the total overlap.
What does DFAU own that IWB doesn't?
1306 positions (5.5% of DFAU) are unique to DFAU, led by STX, NXPI and TEL. In the other direction, 121 positions (2.9% of IWB) are unique to IWB.