IEO vs IWO: Holdings Overlap
IEOiShares U.S. Oil & Gas Exploration & Production ETF
iShares · 46 holdings · $559M · as of 2026-03-31
IWOiShares Russell 2000 Growth ETF
iShares · 1101 holdings · $14.8B · as of 2026-03-31
How similar are IEO and IWO?
iShares U.S. Oil & Gas Exploration & Production ETF (IEO, by iShares) holds 46 positions; iShares Russell 2000 Growth ETF (IWO, by iShares) holds 1101. They have 11 holdings in common, and by portfolio weight the two funds are 0.9% identical. In practical terms the pair is essentially distinct, holding almost none of the same securities.
- Overlap by Weight
- 0.9%Sum of the smaller weight of each shared holding
- Shared Holdings
- 11IEO holds 46 · IWO holds 1101
- Weight in Shared Holdings
- IEO 4%·IWO 1%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 IEO
35 of 46 positions (96.3% of the fund) are not held by IWO. Showing the top 30 by weight.
Only in IWO
1090 of 1101 positions (99.0% of the fund) are not held by IEO. Showing the top 30 by weight.
Sector Breakdown
| Sector | IEO | IWO |
|---|---|---|
| Energy | 99.9% | 3.6% |
| Industrials | 0.0% | 23.7% |
| Health Care | 0.0% | 23.1% |
| Information Technology | 0.0% | 19.0% |
| Financials | 0.0% | 8.6% |
| Other Sectors | 0.0% | 17.8% |
| Unclassified | 0.0% | 4.0% |
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 (0% of IEO, 4% of IWO).
Performance
| Fund | 1M | YTD | 1Y | 3Y (ann.) | 5Y (ann.) | 10Y (ann.) | Yield |
|---|---|---|---|---|---|---|---|
| IEO | +6.1% | +34.9% | +40.9% | +10.4% | +22.1% | +10.3% | 1.95% |
| IWO | +1.2% | +21.0% | +34.7% | +17.5% | +5.9% | +11.0% | 0.42% |
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 IEO vs IWO →
Shared Holdings(11)
The top 10 shared positions account for 100% of the overlap, led by GPOR, DK and SOC.
 GPORGulfport Energy Operating Corp. COMMON SHARES | 0.47% | 0.23% | 0.23% |
|---|---|---|---|
 DKDelek US Holdings Inc. COM | 0.39% | 0.18% | 0.18% |
 SOCSable Offshore Corp., Class A | 0.29% | 0.14% | 0.14% |
 MGYMagnolia Oil & Gas Corporation CL A | 0.82% | 0.08% | 0.08% |
 CRKComstock Resources, Inc. COM | 0.24% | 0.07% | 0.07% |
 CVICVR Energy Inc. COM | 0.15% | 0.07% | 0.07% |
 PARRPar Pacific Holdings, Inc. COM NEW | 0.45% | 0.06% | 0.06% |
 REXRex American Resources Corp COM | 0.19% | 0.02% | 0.02% |
 CLMTCalumet Inc COM | 0.33% | 0.02% | 0.02% |
 WKCWorld Kinect Corporation COM | 0.18% | 0.01% | 0.01% |
 EGYVaalco Energy Inc COM NEW | 0.09% | 0.01% | 0.01% |
Frequently Asked Questions
How much do IEO and IWO overlap?
IEO and IWO overlap by 0.9% of portfolio weight. They share 11 holdings (IEO holds 46 positions and IWO holds 1101), based on each fund's latest SEC-reported holdings.
Is it redundant to own both IEO and IWO?
The two portfolios are 0.9% identical by weight. Owning both is genuine diversification: the funds hold almost none of the same securities.
What are the biggest shared holdings of IEO and IWO?
The largest positions held by both funds are GPOR, DK, SOC, MGY and CRK. Together the top 10 shared positions account for 100% of the total overlap.
What does IEO own that IWO doesn't?
35 positions (96.3% of IEO) are unique to IEO, led by COP, EOG and VLO. In the other direction, 1090 positions (99.0% of IWO) are unique to IWO.