OIH vs VIOG: Holdings Overlap
VanEck · 25 holdings · $1.9B · as of 2026-03-31
VIOGVanguard S&P Small-cap 600 Growth Index Fund
Vanguard · 342 holdings · $1.1B · as of 2026-05-31
Holdings snapshots are 61 days apart (OIH: 2026-03-31, VIOG: 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 OIH and VIOG?
VanEck Oil Services ETF (OIH, by VanEck) holds 25 positions; Vanguard S&P Small-cap 600 Growth Index Fund (VIOG, by Vanguard) holds 342. They have 6 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
- 6OIH holds 25 · VIOG holds 342
- Weight in Shared Holdings
- OIH 16%·VIOG 2%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
19 of 25 positions (84.0% of the fund) are not held by VIOG.
Sector Breakdown
| Sector | OIH | VIOG |
|---|---|---|
| Energy | 99.9% | 4.2% |
| Industrials | 0.0% | 21.8% |
| Information Technology | 0.0% | 18.4% |
| Health Care | 0.0% | 14.7% |
| Financials | 0.0% | 14.2% |
| Other Sectors | 0.0% | 26.5% |
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% |
| VIOG | +1.1% | +25.9% | +33.8% | +15.2% | +6.8% | +11.2% | 0.75% |
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 VIOG →
Shared Holdings(6)
The top 6 shared positions account for 100% of the overlap, led by TDW, NE and WHD.
 TDWTidewater Inc New COM | 2.69% | 0.40% | 0.40% |
|---|---|---|---|
 NENoble Corporation PLC ORD SHS A | 4.64% | 0.37% | 0.37% |
 WHDCactus, Inc., Class A | 2.40% | 0.30% | 0.30% |
 OIIOceaneering International, Inc. COM | 2.72% | 0.27% | 0.27% |
 HPHelmerich & Payne Inc COM | 2.64% | 0.22% | 0.22% |
 INVXInnovex International Inc. COM | 0.85% | 0.05% | 0.05% |
Frequently Asked Questions
How much do OIH and VIOG overlap?
OIH and VIOG overlap by 1.6% of portfolio weight. They share 6 holdings (OIH holds 25 positions and VIOG holds 342), based on each fund's latest SEC-reported holdings.
Is it redundant to own both OIH and VIOG?
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 OIH and VIOG?
The largest positions held by both funds are TDW, NE, WHD, OII and HP. Together the top 6 shared positions account for 100% of the total overlap.
What does OIH own that VIOG doesn't?
19 positions (84.0% of OIH) are unique to OIH, led by SLB, BKR and HAL. In the other direction, 336 positions (98.1% of VIOG) are unique to VIOG.