Data as of Sep 12, 2026. Both funds on the fields they both publish, from the same sources.
ACWI vs VO: how they differ
ACWI and VO hold 11% of their weight in the same names, and ACWI returned more over the year.
iShares MSCI ACWI ETF and Vanguard Mid-Cap Index Fund.
What they hold in common
By the books each fund has filed, ACWI and VO hold 11% of their money in the same securities at the same weight.
| Holding | ACWI | VO |
|---|---|---|
| WESTERN DIGITAL CORPORATION | 0.15% | 1.07% |
| SEAGATE TECHNOLOGY HOLDINGS PUBLIC LIMIT | 0.15% | 1.05% |
| NEWMONT CORPORATION | 0.12% | 0.48% |
| VERTIV HOLDINGS CO | 0.12% | 1.23% |
| QUANTA SERVICES, INC. | 0.11% | 1.05% |
| CONSTELLATION ENERGY CORPORATION. | 0.10% | 0.78% |
| CUMMINS INC. | 0.10% | 0.95% |
| HOWMET AEROSPACE INC. | 0.09% | 1.04% |
| THE WILLIAMS COMPANIES, INC. | 0.09% | 0.44% |
| FEDEX CORPORATION | 0.09% | 0.33% |
| JOHNSON CONTROLS INTERNATIONAL PUBLIC LI | 0.09% | 0.43% |
| SLB N.V. | 0.08% | 0.67% |
| Only in ACWI | Only in VO |
|---|---|
| NVIDIA CORPORATION 4.89% | Carnival Corp Ltd 0.35% |
| APPLE INC. 4.02% | Southwest Airlines Co 0.24% |
| MICROSOFT CORPORATION 2.90% | Medline Inc 0.15% |
| AMAZON.COM, INC. 2.58% | Cerebras Systems Inc 0.06% |
| ALPHABET INC. 2.26% | TKO Group Holdings Inc 0.06% |
| BROADCOM INC. 1.90% | Symbotic Inc 0.01% |
| ALPHABET INC. 1.87% | Venture Global Inc 0.01% |
| Taiwan Semiconductor Manufacturing Compa 1.73% | Lennar Corp 0.01% |
Weight overlap is an ETFIQ calculation: for every security both funds hold, the smaller of the two weights, summed. Above 50%, holding both is close to holding one of them twice. Holdings dated Apr 30, 2026 and Jun 30, 2026.
| ACWI iShares MSCI ACWI ETF | VO Vanguard Mid-Cap Index Fund | |
|---|---|---|
| Where it sits | Core index fund | Core index fund |
| Issuer | iShares | Vanguard |
| What it is | MSCI ACWI | Mid-Cap |
| Total return, 1 year | +19.1% | +12.0% |
| S&P 500 over the same days | +17.5% | +17.5% |
| Gap to the S&P 500 | +1.6 pts | −5.5 pts |
| Expense ratio | 0.32% | 0.03% |
| Already in the S&P 500 | 61.4% | 91.4% |
| Holdings | 2307 | 282 |
ACWI in plain words
ACWI is an index equity fund tracking the MSCI ACWI. Over the year to Sep 11, 2026 it returned +19.1% with distributions reinvested, against +17.5% for the S&P 500 and +23.0% for the Nasdaq-100. The prospectus expense ratio is 0.32% a year. By its holdings filed for Apr 30, 2026, 61% of the fund by weight is stocks the S&P 500 also holds, across 2307 positions, with the top ten at 24.6%.
VO in plain words
VO is an index equity fund tracking the Mid-Cap. Over the year to Sep 11, 2026 it returned +12.0% with distributions reinvested, against +17.5% for the S&P 500 and +23.0% for the Nasdaq-100. The prospectus expense ratio is 0.03% a year. By its holdings filed for Jun 30, 2026, 91% of the fund by weight is stocks the S&P 500 also holds, across 282 positions, with the top ten at 9.6%. It sat 4.1% below its high of Aug 14, 2026 on Sep 11, 2026.
Questions people ask
- Which returned more over the last year, ACWI or VO?
- In the year to Sep 12, 2026, with distributions reinvested, ACWI returned +19.1% and VO returned +12.0%, so ACWI returned more. One year is one year; the longer windows are in the table.
- Which is cheaper, ACWI or VO?
- ACWI charges 0.32% a year and VO charges 0.03%, so VO is cheaper. Fees come from each fund's prospectus.
- How much do ACWI and VO overlap with the S&P 500?
- By their latest filed holdings, 61% of ACWI and 91% of VO by weight is stocks the S&P 500 already holds. Between the two funds, 11% of their books are the same securities at the same weight.
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Where these figures came from
ETFIQ links to the documents behind every figure. It is not affiliated with any issuer, and a link is not an endorsement.
Cite this page. ETFIQ, ACWI against VO, data as of Sep 12, 2026. https://etfiq.com/compare/any/ACWI-VO Free to use with attribution; the underlying files are at Open data.
A comparison is not a recommendation. Standards and sources