VO US

Vanguard Mid-Cap Index Fund ETF Shares Guide (VO): What Is It All About?

Last updated: 2026-10-10

Overview

Vanguard Mid-Cap Index Fund ETF Shares (VO) offers Australian investors exposure to a diversified portfolio of U.S. mid-sized companies. The supplied profile reports 282 holdings, a 0.03% expense ratio and a 1.444% dividend yield. Reported returns were 10.474% year to date and 9.802% over one year, while longer-term results varied across the three-, five- and ten-year periods. As VO trades in U.S. dollars, Australian-dollar outcomes may also be affected by currency movements.

Category

VO offers diversified exposure to mid-sized U.S. companies across industries, rather than targeting a single sector or investment theme. The portfolio’s mix includes industrial, technology, financial, healthcare, energy and consumer businesses, giving investors access to a broad slice of the U.S. mid-cap market.

Mid-cap shares occupy a space between the biggest established companies and smaller businesses. That can provide exposure to firms with different growth profiles and business cycles, but their share prices can remain sensitive to economic conditions and changes in investor sentiment. VO’s reported portfolio is predominantly U.S. equity, with sector exposure led by industrials and technology.

Key facts

Ticker
VO
Exchange
US
ISIN
US9229086296
Provider
Vanguard
Domicile
United States
Currency
USD
Inception date
2004-01-26
Use of income
NA
UCITS
No
Holdings count
282

Costs

TER
0.03%
Net expense ratio
0.03%
AUM
106.1B

The reported expense ratio is 0.03%. This ongoing fund cost is separate from brokerage, trading costs and any currency-conversion costs an Australian investor may incur.

 

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Performance

YTD
10.5%
1 year
9.8%
3 years
18.1%
5 years
7.7%
10 years
11.5%
Dividend yield
1.44%
Top 10 concentration
9.5%

Holdings

  1. Vertiv Holdings Co1.18%
    Ticker
    VRT
    Sector
    Industrials
    Country
    United States

  2. Western Digital Corporation1.08%
    Ticker
    WDC
    Sector
    Technology
    Country
    United States

  3. Seagate Technology PLC1.06%
    Ticker
    STX
    Sector
    Technology
    Country
    United States

  4. Quanta Services Inc1.06%
    Ticker
    PWR
    Sector
    Industrials
    Country
    United States

  5. Howmet Aerospace Inc1.06%
    Ticker
    HWM
    Sector
    Industrials
    Country
    United States

  6. Cummins Inc0.96%
    Ticker
    CMI
    Sector
    Industrials
    Country
    United States

  7. Datadog Inc0.82%
    Ticker
    DDOG
    Sector
    Technology
    Country
    United States

  8. Bloom Energy Corp0.82%
    Ticker
    BE
    Sector
    Industrials
    Country
    United States

  9. Constellation Energy Corp0.75%
    Ticker
    CEG
    Sector
    Utilities
    Country
    United States

  10. Robinhood Markets Inc0.74%
    Ticker
    HOOD
    Sector
    Financial Services
    Country
    United States

Weights are percentages of the fund; bars use a 0–100% scale. Displayed entries may not cover the whole portfolio.

The portfolio spans a wide range of U.S. companies, with 282 holdings and a top-10 concentration of 9.506%. Industrials make up 18.122% of sector exposure and technology 17.642%, followed by financial services at 13.808%. Its largest listed holding is Vertiv Holdings Co at 1.175%; other leading positions include Western Digital, Seagate Technology, Quanta Services and Howmet Aerospace. The broad spread means no single top holding dominates, while sector allocations still influence performance.

Regions

  • North America95.6%

  • Asia Emerging0.6%

  • Europe Developed0.4%

  • Latin America0.2%

  • Japan0.0%

  • Australasia0.0%

  • Asia Developed0.0%

  • United Kingdom0.0%

  • Europe Emerging0.0%

  • Africa/Middle East0.0%

Weights are percentages of the fund; bars use a 0–100% scale. Displayed entries may not cover the whole portfolio.

Asset allocation

  • Stock US97.8%

  • Stock non-US1.6%

  • Cash0.3%

  • Other0.2%

  • Bond0.0%

  • NotClassified0.0%

Weights are percentages of the fund; bars use a 0–100% scale. Displayed entries may not cover the whole portfolio.

Sectors

  • Industrials18.1%

  • Technology17.6%

  • Financial Services13.8%

  • Consumer Cyclicals9.0%

  • Energy8.5%

  • Healthcare8.4%

  • Utilities7.5%

  • Real Estate5.2%

  • Consumer Defensive4.9%

  • Basic Materials3.8%

Weights are percentages of the fund; bars use a 0–100% scale. Displayed entries may not cover the whole portfolio.

Risks

Who it may suit

VO may interest investors researching diversified exposure to mid-sized U.S. companies rather than a portfolio focused only on the largest U.S. businesses. Australian investors should also consider the fund’s U.S.-dollar exposure, share-market risk and fit with their broader portfolio.

Key risks

VO is an equity fund, so its value can fall as well as rise with the U.S. share market. Mid-sized companies may be more sensitive to economic slowdowns, financing conditions and shifts in market sentiment than larger businesses. The portfolio’s sector mix can also affect returns, and Australian investors face currency movements between the U.S. dollar and Australian dollar. Past returns and the reported dividend yield do not guarantee future results.

FAQ

What does VO invest in?

VO provides diversified exposure to U.S. mid-sized companies across a range of industries. Its portfolio is weighted heavily toward U.S. shares.

How concentrated is the portfolio?

The fund holds 282 stocks, and its top 10 holdings account for 9.506% of assets. Industrials and technology are its largest sector exposures.

What are the main risks for Australian investors?

VO is exposed to movements in U.S. share prices and the U.S. dollar, which can affect returns measured in Australian dollars. Mid-cap shares can also be more sensitive to economic and market changes than larger-company shares.

Does VO pay income?

The supplied profile reports a dividend yield of 1.444%. Yield can change, and it should not be taken as a guarantee of future income.

*This content is aimed to provide general information only, and does not take your personal objectives, financial situation or needs into account.

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