IOO vs ACWX: Holdings Overlap
iShares · 110 holdings · $9.3B · as of 2026-03-31
ACWXiShares MSCI ACWI ex U.S. ETF
iShares · 1761 holdings · $11.7B · as of 2026-04-30
Holdings snapshots are 30 days apart (IOO: 2026-03-31, ACWX: 2026-04-30). 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 IOO and ACWX?
iShares Global 100 ETF (IOO, by iShares) holds 110 positions; iShares MSCI ACWI ex U.S. ETF (ACWX, by iShares) holds 1761. They have 59 holdings in common, and by portfolio weight the two funds are 20.0% identical. In practical terms the pair is lightly overlapping, with most of each portfolio distinct.
- Overlap by Weight
- 20.0%Sum of the smaller weight of each shared holding
- Shared Holdings
- 59IOO holds 110 · ACWX holds 1761
- Weight in Shared Holdings
- IOO 21%·ACWX 21%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
51 of 110 positions (78.9% of the fund) are not held by ACWX. Showing the top 30 by weight.
Only in ACWX
1702 of 1761 positions (78.8% of the fund) are not held by IOO. Showing the top 30 by weight.
Sector Breakdown
| Sector | IOO | ACWX |
|---|---|---|
| Information Technology | 42.3% | 17.5% |
| Financials | 10.0% | 21.6% |
| Industrials | 5.0% | 12.5% |
| Communication Services | 10.1% | 4.5% |
| Health Care | 9.8% | 6.1% |
| Other Sectors | 22.5% | 26.0% |
| Unclassified | 0.0% | 11.4% |
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 (0% of IOO, 11% of ACWX).
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% |
| ACWX | +3.0% | +16.6% | +28.7% | +19.1% | +9.3% | +9.6% | 2.46% |
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 ACWX →
Shared Holdings(59)
The top 10 shared positions account for 47% of the overlap, led by 005930, ASML and 700.
 005930Samsung Electronics Co Ltd | 1.66% | 1.95% | 1.66% |
|---|---|---|---|
 ASMLASML Holding NV | 1.48% | 1.54% | 1.48% |
 700Tencent Holdings Ltd. | 1.10% | 1.07% | 1.07% |
 HSBAHSBC Holdings PLC | 0.81% | 0.86% | 0.81% |
 AZNAstraZeneca PLC ORD USD0.25 | 0.87% | 0.80% | 0.80% |
 ROPRoche Holding AG | 0.80% | 0.78% | 0.78% |
 NOVNNovartis AG (Registered) | 0.84% | 0.76% | 0.76% |
 NESNNestle SA (Registered) | 0.72% | 0.71% | 0.71% |
 SHELShell PLC | 0.75% | 0.71% | 0.71% |
 8306Mitsubishi UFJ Financial Group Inc. NPV | 0.58% | 0.57% | 0.57% |
 BHPBHP Group Ltd. | 0.52% | 0.55% | 0.52% |
 SIESiemens AG (Registered) | 0.51% | 0.62% | 0.51% |
 7203Toyota Motor Corp. NPV | 0.70% | 0.51% | 0.51% |
 TTETotalEnergies SE EUR2.5 | 0.53% | 0.50% | 0.50% |
 SAPSAP SE | 0.50% | 0.48% | 0.48% |
 SANBanco Santander SA | 0.48% | 0.49% | 0.48% |
 ALVAllianz SE (Registered) | 0.46% | 0.47% | 0.46% |
 SUSchneider Electric SE | 0.42% | 0.47% | 0.42% |
 MCLVMH Moet Hennessy Louis Vuitton SE | 0.40% | 0.36% | 0.36% |
 ABBNABB Ltd. (Registered) | 0.36% | 0.44% | 0.36% |
 6758Sony Group Corp. NPV | 0.37% | 0.35% | 0.35% |
 BBVABanco Bilbao Vizcaya Argentaria SA | 0.36% | 0.34% | 0.34% |
 ULVRUnilever PLC | 0.34% | 0.34% | 0.34% |
 BP-BP plc | 0.35% | 0.34% | 0.34% |
 UBSGUBS Group AG (Registered) | 0.34% | 0.39% | 0.34% |
Frequently Asked Questions
How much do IOO and ACWX overlap?
IOO and ACWX overlap by 20.0% of portfolio weight. They share 59 holdings (IOO holds 110 positions and ACWX holds 1761), based on each fund's latest SEC-reported holdings.
Is it redundant to own both IOO and ACWX?
The two portfolios are 20.0% 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 IOO and ACWX?
The largest positions held by both funds are 005930, ASML, 700, HSBA and AZN. Together the top 10 shared positions account for 47% of the total overlap.
What does IOO own that ACWX doesn't?
51 positions (78.9% of IOO) are unique to IOO, led by NVDA, AAPL and MSFT. In the other direction, 1702 positions (78.8% of ACWX) are unique to ACWX.