OIH vs VOO: Holdings Overlap
VanEck · 25 holdings · $1.9B · as of 2026-03-31
Vanguard · 504 holdings · $1.03T · as of 2026-03-31
How similar are OIH and VOO?
VanEck Oil Services ETF (OIH, by VanEck) holds 25 positions; Vanguard 500 Index Fund (VOO, by Vanguard) holds 504. They have 3 holdings in common, and by portfolio weight the two funds are 0.3% identical. In practical terms the pair is essentially distinct, holding almost none of the same securities.
- Overlap by Weight
- 0.3%Sum of the smaller weight of each shared holding
- Shared Holdings
- 3OIH holds 25 · VOO holds 504
- Weight in Shared Holdings
- OIH 39%·VOO 0%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 OIH
22 of 25 positions (60.8% of the fund) are not held by VOO.
Sector Breakdown
| Sector | OIH | VOO |
|---|---|---|
| Energy | 99.9% | 4.0% |
| Information Technology | 0.0% | 32.7% |
| Financials | 0.0% | 12.4% |
| Communication Services | 0.0% | 10.5% |
| Consumer Discretionary | 0.0% | 9.9% |
| Other Sectors | 0.0% | 30.3% |
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 |
|---|---|---|---|---|---|---|---|
| OIH | +6.0% | +36.4% | +67.5% | +6.4% | +17.5% | -2.1% | 1.25% |
| VOO | +3.4% | +14.0% | +23.7% | +21.3% | +13.4% | +15.4% | 1.03% |
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 OIH vs VOO →
Shared Holdings(3)
The top 3 shared positions account for 100% of the overlap, led by SLB, BKR and HAL.
Frequently Asked Questions
How much do OIH and VOO overlap?
OIH and VOO overlap by 0.3% of portfolio weight. They share 3 holdings (OIH holds 25 positions and VOO holds 504), based on each fund's latest SEC-reported holdings.
Is it redundant to own both OIH and VOO?
The two portfolios are 0.3% identical by weight. Owning both is genuine diversification: the funds hold almost none of the same securities.
What are the biggest shared holdings of OIH and VOO?
The largest positions held by both funds are SLB, BKR and HAL. Together the top 3 shared positions account for 100% of the total overlap.
What does OIH own that VOO doesn't?
22 positions (60.8% of OIH) are unique to OIH, led by FTI, TS and NE. In the other direction, 501 positions (99.5% of VOO) are unique to VOO.