IVOO vs VOX: Holdings Overlap
IVOOVanguard S&P Mid-cap 400 Index Fund
Vanguard · 400 holdings · $3.9B · as of 2026-05-31
VOXVanguard Communication Services Index Fund
Vanguard · 114 holdings · $5.9B · as of 2026-05-31
How similar are IVOO and VOX?
Vanguard S&P Mid-cap 400 Index Fund (IVOO, by Vanguard) holds 400 positions; Vanguard Communication Services Index Fund (VOX, by Vanguard) holds 114. They have 4 holdings in common, and by portfolio weight the two funds are 1.0% identical. In practical terms the pair is essentially distinct, holding almost none of the same securities.
- Overlap by Weight
- 1.0%Sum of the smaller weight of each shared holding
- Shared Holdings
- 4IVOO holds 400 · VOX holds 114
- Weight in Shared Holdings
- IVOO 1%·VOX 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 IVOO
396 of 400 positions (98.9% of the fund) are not held by VOX. Showing the top 30 by weight.
Only in VOX
110 of 114 positions (97.7% of the fund) are not held by IVOO. Showing the top 30 by weight.
Sector Breakdown
| Sector | IVOO | VOX |
|---|---|---|
| Communication Services | 1.0% | 99.7% |
| Industrials | 25.6% | 0.0% |
| Information Technology | 15.7% | 0.0% |
| Financials | 14.3% | 0.0% |
| Consumer Discretionary | 11.1% | 0.0% |
| Other Sectors | 32.2% | 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.
Performance
| Fund | 1M | YTD | 1Y | 3Y (ann.) | 5Y (ann.) | 10Y (ann.) | Yield |
|---|---|---|---|---|---|---|---|
| IVOO | +3.1% | +18.5% | +26.0% | +14.6% | +9.0% | +11.2% | 1.14% |
| VOX | -1.3% | -2.7% | +8.9% | +20.4% | +6.4% | +8.3% | 1.05% |
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 IVOO vs VOX →
Shared Holdings(4)
The top 4 shared positions account for 100% of the overlap, led by NYT, PINS and NXST.
Frequently Asked Questions
How much do IVOO and VOX overlap?
IVOO and VOX overlap by 1.0% of portfolio weight. They share 4 holdings (IVOO holds 400 positions and VOX holds 114), based on each fund's latest SEC-reported holdings.
Is it redundant to own both IVOO and VOX?
The two portfolios are 1.0% identical by weight. Owning both is genuine diversification: the funds hold almost none of the same securities.
What are the biggest shared holdings of IVOO and VOX?
The largest positions held by both funds are NYT, PINS, NXST and WMG. Together the top 4 shared positions account for 100% of the total overlap.
What does IVOO own that VOX doesn't?
396 positions (98.9% of IVOO) are unique to IVOO, led by FLEX, TWLO and FTI. In the other direction, 110 positions (97.7% of VOX) are unique to VOX.