IWO vs REGL: Holdings Overlap
IWOiShares Russell 2000 Growth ETF
iShares · 1101 holdings · $14.8B · as of 2026-03-31
REGLProShares S&P MidCap 400 Dividend Aristocrats ETF
ProShares · 65 holdings · $1.8B · as of 2026-05-31
Holdings snapshots are 61 days apart (IWO: 2026-03-31, REGL: 2026-05-31). 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 IWO and REGL?
iShares Russell 2000 Growth ETF (IWO, by iShares) holds 1101 positions; ProShares S&P MidCap 400 Dividend Aristocrats ETF (REGL, by ProShares) holds 65. They have 7 holdings in common, and by portfolio weight the two funds are 1.6% identical. In practical terms the pair is essentially distinct, holding almost none of the same securities.
- Overlap by Weight
- 1.6%Sum of the smaller weight of each shared holding
- Shared Holdings
- 7IWO holds 1101 · REGL holds 65
- Weight in Shared Holdings
- IWO 2%·REGL 11%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 IWO
1094 of 1101 positions (98.3% of the fund) are not held by REGL. Showing the top 30 by weight.
Sector Breakdown
| Sector | IWO | REGL |
|---|---|---|
| Financials | 8.6% | 30.9% |
| Industrials | 23.7% | 13.6% |
| Health Care | 23.1% | 3.2% |
| Information Technology | 19.0% | 1.8% |
| Utilities | 0.5% | 15.1% |
| Other Sectors | 20.9% | 35.1% |
| Unclassified | 4.0% | 0.0% |
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. “Unclassified” is weight we could not classify (4% of IWO, 0% of REGL).
Performance
| Fund | 1M | YTD | 1Y | 3Y (ann.) | 5Y (ann.) | 10Y (ann.) | Yield |
|---|---|---|---|---|---|---|---|
| IWO | +1.2% | +21.0% | +34.7% | +17.5% | +5.9% | +11.0% | 0.42% |
| REGL | +3.7% | +14.8% | +18.4% | +12.5% | +8.5% | +9.8% | 2.13% |
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 IWO vs REGL →
Shared Holdings(7)
The top 7 shared positions account for 100% of the overlap, led by ENSG, FFIN and CBT.
 ENSGEnsign Group, Inc. (The) | 0.76% | 1.37% | 0.76% |
|---|---|---|---|
 FFINFirst Financial Bankshares, Inc. | 0.27% | 1.59% | 0.27% |
 CBTCabot Corp. | 0.25% | 1.81% | 0.25% |
 MZTIMarzetti Co. (The) | 0.19% | 1.38% | 0.19% |
 UMBFUMB Financial Corp. | 0.05% | 1.68% | 0.05% |
 GATXGATX Corp. | 0.03% | 1.33% | 0.03% |
 IBOCInternational Bancshares Corp. | 0.03% | 1.59% | 0.03% |
Frequently Asked Questions
How much do IWO and REGL overlap?
IWO and REGL overlap by 1.6% of portfolio weight. They share 7 holdings (IWO holds 1101 positions and REGL holds 65), based on each fund's latest SEC-reported holdings.
Is it redundant to own both IWO and REGL?
The two portfolios are 1.6% identical by weight. Owning both is genuine diversification: the funds hold almost none of the same securities.
What are the biggest shared holdings of IWO and REGL?
The largest positions held by both funds are ENSG, FFIN, CBT, MZTI and UMBF. Together the top 7 shared positions account for 100% of the total overlap.
What does IWO own that REGL doesn't?
1094 positions (98.3% of IWO) are unique to IWO, led by BE, FN and CRDO. In the other direction, 58 positions (89.0% of REGL) are unique to REGL.