IEFA vs IOO: Holdings Overlap
IEFAiShares Core MSCI EAFE ETF
iShares · 2632 holdings · $193.5B · as of 2026-04-30
iShares · 110 holdings · $9.3B · as of 2026-03-31
Holdings snapshots are 30 days apart (IEFA: 2026-04-30, IOO: 2026-03-31). 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 IEFA and IOO?
iShares Core MSCI EAFE ETF (IEFA, by iShares) holds 2632 positions; iShares Global 100 ETF (IOO, by iShares) holds 110. They have 56 holdings in common, and by portfolio weight the two funds are 18.1% identical. In practical terms the pair is lightly overlapping, with most of each portfolio distinct.
- Overlap by Weight
- 18.1%Sum of the smaller weight of each shared holding
- Shared Holdings
- 56IEFA holds 2632 · IOO holds 110
- Weight in Shared Holdings
- IEFA 26%·IOO 18%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 IEFA
2576 of 2632 positions (73.5% of the fund) are not held by IOO. Showing the top 30 by weight.
Sector Breakdown
| Sector | IEFA | IOO |
|---|---|---|
| Information Technology | 7.9% | 42.3% |
| Financials | 20.5% | 10.0% |
| Industrials | 16.0% | 5.0% |
| Communication Services | 3.6% | 10.1% |
| Health Care | 8.3% | 9.8% |
| Other Sectors | 26.0% | 22.5% |
| Unclassified | 17.0% | 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. “Unclassified” is weight we could not classify (17% of IEFA, 0% of IOO).
Performance
| Fund | 1M | YTD | 1Y | 3Y (ann.) | 5Y (ann.) | 10Y (ann.) | Yield |
|---|---|---|---|---|---|---|---|
| IEFA | +4.2% | +14.8% | +24.5% | +17.9% | +9.3% | +9.8% | 3.25% |
| IOO | +5.6% | +16.0% | +31.2% | +25.4% | +16.4% | +16.6% | 0.80% |
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 IEFA vs IOO →
Shared Holdings(56)
The top 10 shared positions account for 45% of the overlap, led by ASML, AZN and NOVN.
 ASMLASML Holding NV | 2.21% | 1.48% | 1.48% |
|---|---|---|---|
 AZNAstraZeneca PLC ORD USD0.25 | 1.16% | 0.87% | 0.87% |
 NOVNNovartis AG (Registered) | 1.11% | 0.84% | 0.84% |
 HSBAHSBC Holdings PLC | 1.24% | 0.81% | 0.81% |
 ROPRoche Holding AG | 1.13% | 0.80% | 0.80% |
 SHELShell PLC | 1.02% | 0.75% | 0.75% |
 NESNNestle SA (Registered) | 1.03% | 0.72% | 0.72% |
 7203Toyota Motor Corp. NPV | 0.71% | 0.70% | 0.70% |
 8306Mitsubishi UFJ Financial Group Inc. NPV | 0.80% | 0.58% | 0.58% |
 TTETotalEnergies SE EUR2.5 | 0.73% | 0.53% | 0.53% |
 BHPBHP Group Ltd. | 0.79% | 0.52% | 0.52% |
 SIESiemens AG (Registered) | 0.89% | 0.51% | 0.51% |
 SAPSAP SE | 0.69% | 0.50% | 0.50% |
 SANBanco Santander SA | 0.70% | 0.48% | 0.48% |
 ALVAllianz SE (Registered) | 0.68% | 0.46% | 0.46% |
 SUSchneider Electric SE | 0.69% | 0.42% | 0.42% |
 MCLVMH Moet Hennessy Louis Vuitton SE | 0.52% | 0.40% | 0.40% |
 DTEDeutsche Telekom AG (Registered) | 0.47% | 0.37% | 0.37% |
 6758Sony Group Corp. NPV | 0.49% | 0.37% | 0.37% |
 ABBNABB Ltd. (Registered) | 0.62% | 0.36% | 0.36% |
 BBVABanco Bilbao Vizcaya Argentaria SA | 0.50% | 0.36% | 0.36% |
 BP-BP plc | 0.49% | 0.35% | 0.35% |
 ULVRUnilever PLC | 0.50% | 0.34% | 0.34% |
 UBSGUBS Group AG (Registered) | 0.55% | 0.34% | 0.34% |
 GSKGSK plc | 0.42% | 0.32% | 0.32% |
Frequently Asked Questions
How much do IEFA and IOO overlap?
IEFA and IOO overlap by 18.1% of portfolio weight. They share 56 holdings (IEFA holds 2632 positions and IOO holds 110), based on each fund's latest SEC-reported holdings.
Is it redundant to own both IEFA and IOO?
The two portfolios are 18.1% identical by weight. Owning both is not redundant. Most of each portfolio is distinct, so the funds can serve different roles.
What are the biggest shared holdings of IEFA and IOO?
The largest positions held by both funds are ASML, AZN, NOVN, HSBA and ROP. Together the top 10 shared positions account for 45% of the total overlap.
What does IEFA own that IOO doesn't?
2576 positions (73.5% of IEFA) are unique to IEFA, led by CBA, ENR and IBE. In the other direction, 54 positions (81.7% of IOO) are unique to IOO.