IOO vs VTI: Holdings Overlap
iShares · 110 holdings · $9.3B · as of 2026-03-31
VTIVanguard Total Stock Market Index Fund
Vanguard · 3505 holdings · $696.4B · as of 2026-03-31
How similar are IOO and VTI?
iShares Global 100 ETF (IOO, by iShares) holds 110 positions; Vanguard Total Stock Market Index Fund (VTI, by Vanguard) holds 3505. They have 51 holdings in common, and by portfolio weight the two funds are 43.3% identical. In practical terms the pair is moderately overlapping; they share a meaningful core, but each fund adds distinct exposure.
- Overlap by Weight
- 43.3%Sum of the smaller weight of each shared holding
- Shared Holdings
- 51IOO holds 110 · VTI holds 3505
- Weight in Shared Holdings
- IOO 79%·VTI 43%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 IOO
59 of 110 positions (20.8% of the fund) are not held by VTI. Showing the top 30 by weight.
Sector Breakdown
| Sector | IOO | VTI |
|---|---|---|
| Information Technology | 42.3% | 30.5% |
| Financials | 10.0% | 12.7% |
| Industrials | 5.0% | 10.4% |
| Communication Services | 10.1% | 9.6% |
| Health Care | 9.8% | 10.0% |
| Other Sectors | 22.5% | 26.1% |
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 |
|---|---|---|---|---|---|---|---|
| IOO | +5.6% | +16.0% | +31.2% | +25.4% | +16.4% | +16.6% | 0.80% |
| VTI | +3.3% | +14.6% | +24.2% | +20.9% | +12.3% | +14.9% | 1.02% |
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 IOO vs VTI →
Shared Holdings(51)
The top 10 shared positions account for 71% of the overlap, led by NVDA, AAPL and MSFT.
 NVDANVIDIA Corp. COM | 12.13% | 6.42% | 6.42% |
|---|---|---|---|
 AAPLApple Inc. COM | 10.66% | 5.94% | 5.94% |
 MSFTMicrosoft Corp. COM | 7.87% | 4.38% | 4.38% |
 AMZNAmazon.com, Inc. COM | 5.82% | 3.21% | 3.21% |
 GOOGLAlphabet Inc. CAP STK CL A | 4.79% | 2.67% | 2.67% |
 AVGOBroadcom Inc COM | 4.20% | 2.34% | 2.34% |
 GOOGAlphabet Inc. CAP STK CL C | 3.84% | 2.11% | 2.11% |
 LLYEli Lilly & Co. COM | 2.09% | 1.25% | 1.25% |
 JPMJPMorgan Chase & Co. COM | 2.27% | 1.19% | 1.19% |
 XOMExxon Mobil Corp. COM | 2.03% | 1.13% | 1.13% |
 JNJJohnson & Johnson COM | 1.69% | 0.94% | 0.94% |
 WMTWalmart Inc COM | 1.56% | 0.87% | 0.87% |
 MAMasterCard Incorporated CL A | 1.16% | 0.63% | 0.63% |
 CVXChevron Corp. COM | 1.11% | 0.63% | 0.63% |
 PGThe Procter & Gamble Co. COM | 0.96% | 0.54% | 0.54% |
 CATCaterpillar Inc COM | 0.95% | 0.53% | 0.53% |
 MRKMerck & Co., Inc COM | 0.86% | 0.47% | 0.47% |
 GEGeneral Electric Co. | 0.85% | 0.45% | 0.45% |
 CSCOCisco Systems, Inc. COM | 0.87% | 0.44% | 0.44% |
 KOCoca-Cola Co (The) COM | 0.84% | 0.42% | 0.42% |
 RTXRTX Corp. COM | 0.74% | 0.41% | 0.41% |
 PMPhilip Morris International Inc. COM | 0.74% | 0.41% | 0.41% |
 GSGoldman Sachs Group, Inc. (The) | 0.73% | 0.38% | 0.38% |
 LINLinde PLC COM EUR0.001 | 0.66% | 0.37% | 0.37% |
 IBMInternational Business Machines Corp. COM | 0.65% | 0.36% | 0.36% |
Frequently Asked Questions
How much do IOO and VTI overlap?
IOO and VTI overlap by 43.3% of portfolio weight. They share 51 holdings (IOO holds 110 positions and VTI holds 3505), based on each fund's latest SEC-reported holdings.
Is it redundant to own both IOO and VTI?
The two portfolios are 43.3% identical by weight. Owning both is defensible: they share a meaningful core, but each fund adds exposure the other lacks.
What are the biggest shared holdings of IOO and VTI?
The largest positions held by both funds are NVDA, AAPL, MSFT, AMZN and GOOGL. Together the top 10 shared positions account for 71% of the total overlap.
What does IOO own that VTI doesn't?
59 positions (20.8% of IOO) are unique to IOO, led by 005930, ASML and 700. In the other direction, 3454 positions (56.3% of VTI) are unique to VTI.