IOO vs ACWI: Holdings Overlap
iShares · 110 holdings · $9.3B · as of 2026-03-31
iShares · 2308 holdings · $33.2B · as of 2026-04-30
Holdings snapshots are 30 days apart (IOO: 2026-03-31, ACWI: 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 ACWI?
iShares Global 100 ETF (IOO, by iShares) holds 110 positions; iShares MSCI ACWI ETF (ACWI, by iShares) holds 2308. They have 110 holdings in common, and by portfolio weight the two funds are 39.0% identical. In practical terms the pair is moderately overlapping; they share a meaningful core, but each fund adds distinct exposure.
- Overlap by Weight
- 39.0%Sum of the smaller weight of each shared holding
- Shared Holdings
- 110IOO holds 110 · ACWI holds 2308
- Weight in Shared Holdings
- IOO 100%·ACWI 39%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
Every position in IOO is also held by ACWI, so it brings nothing the other fund doesn’t already own.
Only in ACWI
2198 of 2308 positions (60.8% of the fund) are not held by IOO. Showing the top 30 by weight.
Sector Breakdown
| Sector | IOO | ACWI |
|---|---|---|
| Information Technology | 42.3% | 28.2% |
| Financials | 10.0% | 15.5% |
| Industrials | 5.0% | 10.3% |
| Communication Services | 10.1% | 8.8% |
| Health Care | 9.8% | 7.7% |
| Other Sectors | 22.5% | 25.1% |
| Unclassified | 0.0% | 4.1% |
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. “Unclassified” is weight we could not classify (0% of IOO, 4% of ACWI).
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% |
| ACWI | +3.2% | +14.8% | +25.0% | +20.4% | +11.3% | +12.8% | 1.39% |
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 ACWI →
Shared Holdings(110)
The top 10 shared positions account for 58% of the overlap, led by NVDA, AAPL and MSFT.
 NVDANVIDIA Corp. COM | 12.13% | 4.88% | 4.88% |
|---|---|---|---|
 AAPLApple Inc. COM | 10.66% | 4.01% | 4.01% |
 MSFTMicrosoft Corp. COM | 7.87% | 2.90% | 2.90% |
 AMZNAmazon.com, Inc. COM | 5.82% | 2.57% | 2.57% |
 GOOGLAlphabet Inc. CAP STK CL A | 4.79% | 2.25% | 2.25% |
 AVGOBroadcom Inc COM | 4.20% | 1.89% | 1.89% |
 GOOGAlphabet Inc. CAP STK CL C | 3.84% | 1.87% | 1.87% |
 JPMJPMorgan Chase & Co. COM | 2.27% | 0.85% | 0.85% |
 LLYEli Lilly & Co. COM | 2.09% | 0.75% | 0.75% |
 005930Samsung Electronics Co Ltd | 1.66% | 0.72% | 0.72% |
 XOMExxon Mobil Corp. COM | 2.03% | 0.65% | 0.65% |
 WMTWalmart Inc COM | 1.56% | 0.58% | 0.58% |
 ASMLASML Holding NV | 1.48% | 0.56% | 0.56% |
 JNJJohnson & Johnson COM | 1.69% | 0.56% | 0.56% |
 INTCIntel Corporation COM | 0.59% | 0.43% | 0.43% |
 MAMasterCard Incorporated CL A | 1.16% | 0.42% | 0.42% |
 CATCaterpillar Inc COM | 0.95% | 0.42% | 0.42% |
 700Tencent Holdings Ltd. | 1.10% | 0.39% | 0.39% |
 CVXChevron Corp. COM | 1.11% | 0.37% | 0.37% |
 CSCOCisco Systems, Inc. COM | 0.87% | 0.36% | 0.36% |
 PGThe Procter & Gamble Co. COM | 0.96% | 0.35% | 0.35% |
 KOCoca-Cola Co (The) COM | 0.84% | 0.32% | 0.32% |
 HSBAHSBC Holdings PLC | 0.81% | 0.32% | 0.32% |
 GEGeneral Electric Co. | 0.85% | 0.31% | 0.31% |
 AZNAstraZeneca PLC ORD USD0.25 | 0.87% | 0.29% | 0.29% |
Frequently Asked Questions
How much do IOO and ACWI overlap?
IOO and ACWI overlap by 39.0% of portfolio weight. They share 110 holdings (IOO holds 110 positions and ACWI holds 2308), based on each fund's latest SEC-reported holdings.
Is it redundant to own both IOO and ACWI?
The two portfolios are 39.0% 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 ACWI?
The largest positions held by both funds are NVDA, AAPL, MSFT, AMZN and GOOGL. Together the top 10 shared positions account for 58% of the total overlap.
What does IOO own that ACWI doesn't?
Nothing. Every position in IOO is also held by ACWI. In the other direction, 2198 positions (60.8% of ACWI) are unique to ACWI.