At a glance
IOO charges 0.4% a year, above the 0.16% average of the 8 funds most like it (the 8th cheapest of 9). It has $8.47B in assets, the 7th largest of that group; it paid 0.81% of its price in distributions over the past 12 months, semiannual. Over the past year it returned +16.9% with distributions reinvested (S&P 500: +11.5%), 2nd of those 9 funds; over three years it returned +28.1% a year. At its worst it fell 31.0% in the 2020 crash (S&P 500: 33.7%) and 23.5% in the 2022 bear market (S&P 500: 24.5%), and was back at its earlier high 4 months and 9 months after the lows. Its ten largest positions make up 57.4% of the fund, out of 111 in all.
The short version
iShares Global 100 ETF (IOO) tracks the S&P Global 100, an index of about 100 of the world's largest multinational companies. Even so, about 78% of the fund was in US stocks as of June 30, 2026. NVIDIA, Apple and Microsoft alone made up about 30% of assets. Its expense ratio is 0.40% a year, more than twice the 0.16% average of similar funds.
Price history
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IOO +16.9% over the year to Oct 27, 2026, total return with distributions reinvested.
How it has behaved
| YTD | 1 yr | 3 yr | 5 yr | 10 yr | Since start | |
|---|---|---|---|---|---|---|
| IOO official prospectus, to Dec 31, 2025 | — | +27.05% | — | +16.67% | +15.41% | — |
| SP Global Broad Market Index Net index, same period | — | +21.96% | — | +10.50% | +11.28% | — |
| SP Global 100 Net index, same period | — | +27.16% | — | +16.69% | +15.36% | — |
| IOO price data to Oct 27, 2026 | +14.7% | +16.9% | +28.1% | +15.6% | +16.6% | +10.0% |
- Over the year to Oct 27, 2026, IOO returned +16.9%, 2nd of 9 among similar funds.
- Its 5-year annualized return was +15.6% and its 10-year +16.6%.
- In the 2020 COVID crash it fell 31% and regained its old high 3.9 months after the low.
- Its worst full calendar year was 2008 (-36.1%); its best was 2019 (+30.0%).
- The deepest fall in its price history was 55.9% (Oct 31, 2007 to Mar 9, 2009), recovered by Aug 2, 2013.
Show as a table
| Year | Price data | Prospectus (official) |
|---|---|---|
| 2026 (to date) | +14.7% | — |
| 2025 | +27.0% | +27.05% |
| 2024 | +26.5% | +26.60% |
| 2023 | +27.7% | +27.61% |
| 2022 | -16.3% | -16.28% |
| 2021 | +26.0% | +25.81% |
| 2020 | +18.6% | +18.67% |
| 2019 | +30.0% | +29.82% |
| 2018 | -6.2% | -6.20% |
| 2017 | +23.6% | +23.39% |
| 2016 | +8.4% | +8.76% |
| 2015 | -1.8% | — |
| 2014 | +2.1% | — |
| 2013 | +23.9% | — |
| 2012 | +13.7% | — |
| 2011 | -4.2% | — |
| 2010 | +5.9% | — |
| 2009 | +24.1% | — |
| 2008 | -36.1% | — |
| 2007 | +11.1% | — |
| 2006 | +19.9% | — |
| 2008 financial crisis stocks fell Oct 9, 2007 – Mar 9, 2009 | Lost 55.1% over that stretch · deepest drop along the way 55.9%, back to its old high 52.8 months after the low |
|---|---|
| 2020 COVID crash stocks fell Feb 19, 2020 – Mar 23, 2020 | Lost 31% over that stretch · deepest drop along the way 31%, back to its old high 3.9 months after the low |
| 2022 bear market stocks fell Jan 3, 2022 – Oct 12, 2022 | Lost 23.1% over that stretch · deepest drop along the way 23.5%, back to its old high 9.4 months after the low |
Dividends and income
Show as a table
| Year | Per share | Change |
|---|---|---|
| 2026 (to date) | $0.7200 | |
| 2025 | $1.1600 | +7.4% |
| 2024 | $1.0800 | -10.0% |
| 2023 | $1.2000 | -6.3% |
| 2022 | $1.2800 | +7.6% |
| 2021 | $1.1900 | +26.6% |
| 2020 | $0.9400 | -13.8% |
| 2019 | $1.0900 | +0.9% |
| 2018 | $1.0800 | +4.9% |
| 2017 | $1.0300 | -2.8% |
| 2016 | $1.0600 | +1.0% |
| 2015 | $1.0500 | -21.9% |
| 2014 | $1.3450 | +47.8% |
| 2013 | $0.9100 | +1.7% |
| 2012 | $0.8950 | 0.0% |
| 2011 | $0.8950 | +30.7% |
| 2010 | $0.6850 | -18.0% |
| 2009 | $0.8350 | -11.2% |
| 2008 | $0.9400 | +36.2% |
| 2007 | $0.6900 | +1.5% |
| 2006 | $0.6800 |
What's inside
As of Jun 30, 2026, the fund held 111 securities; the ten largest made up 57.37% of assets.
| Holding | Weight | |
|---|---|---|
| NVIDIA CORPORATION | 12.26% | |
| APPLE INC. | 10.75% | |
| MICROSOFT CORPORATION | 7.01% | |
| AMAZON.COM, INC. | 5.90% | |
| ALPHABET INC. Class A | 5.30% | |
| BROADCOM INC. | 4.53% | |
| ALPHABET INC. | 4.23% | |
| Samsung Electronics Co., Ltd. | 2.76% | |
| ELI LILLY AND COMPANY | 2.40% | |
| JPMORGAN CHASE & CO. | 2.22% | |
| ASML Holding N.V. | 1.95% | |
| INTEL CORPORATION | 1.67% | |
| JOHNSON & JOHNSON | 1.55% | |
| EXXON MOBIL CORPORATION | 1.43% | |
| WALMART INC. | 1.26% |
By country
United States 77.78%United Kingdom 4.01%Switzerland 3.08%South Korea 2.76%Germany 2.48%By asset type
Stocks 99.57%Other 0.05%By sector
Sectors of the companies held, for the 77.8% of the fund in companies that have a stock page here; other holdings and cash aren't classified. Source: N-PORT holdings report as of Jun 30, 2026. Cash, money-market funds and derivatives are shown separately from the securities list.What changed recently
- Over the three months to Jun 30, 2026, investors withdrew a net $108.3M (creations minus redemptions, per the N-PORT report).
- Monthly total returns reported for that quarter: +11.85%, +5.77%, -3.86%.
How it works
IOO tries to match the S&P Global 100. The index is run by S&P Dow Jones Indices, which is independent of BlackRock. It is a subset of the broader S&P Global 1200. It picks large, heavily traded companies and screens them for size, liquidity (how easily shares trade) and sector representation. As of March 31, 2026, it held 102 stocks from 11 countries, including the US, the UK, Switzerland, Japan, South Korea and Germany. Each company is weighted by its float-adjusted market value, meaning the value of shares actually available to investors. The biggest companies therefore get the biggest slices.
BlackRock uses "representative sampling". Instead of buying every index stock, it may hold a sample chosen to behave like the whole index. The fund must keep at least 80% of its assets in index stocks. It may use futures and other derivatives in small amounts, hold some cash, and lend out securities worth up to one-third of its assets. The prospectus reports portfolio turnover of 2%, which means very little trading.
Two mechanics matter for holders. First, the fund is valued in US dollars, so its foreign holdings gain or lose value as exchange rates move. Second, because weights follow company size, a few US technology giants dominate. As of June 30, 2026, the top 10 holdings were 57% of assets.
What it really costs
- IOO charges 0.4% a year, versus an average of 0.16% for the similar funds below (8th of 9, cheapest first).
- Using the prospectus's standard example, $10,000 invested would cost about $41 in the first year and $505 over 10 years (assuming a 5% annual return).
| Cost of $10,000 (SEC example) | 1 yr | 3 yrs | 5 yrs | 10 yrs |
|---|---|---|---|---|
| IOO | $41 | $128 | $224 | $505 |
In a retirement portfolio
Heavy concentration in a handful of US tech giants and a cost well above similar funds make it a better fit as a complement than as a foundation.
IOO gives one-fund access to the world's largest companies, with some reach beyond the US. It carries full stock-market risk. In the 2008 financial crisis it fell 55.9% from its October 2007 peak. It took about 53 months, until August 2013, to recover. It dropped 31% in the 2020 COVID crash and recovered in under four months. In the 2022 bear market it fell 23.5% and needed about nine months to recover. Its worst calendar year was 2008, when it lost 36.1%. Anyone forced to sell shares for spending money in a slump like 2008 would have locked in deep losses.
Income is small: the trailing yield was 0.81% as of October 27, 2026, paid twice a year. Under the SEC's standard $10,000 example, costs come to $41 after one year and $505 over 10 years. Past results don't predict the future, and a plan should look at the whole portfolio, not one fund.
Who it may suit — and who should look elsewhere
May suit
- Investors who want the world's biggest companies, including non-US names like Samsung and ASML, in one low-turnover fund.
- Long-term holders who are comfortable with heavy weights in NVIDIA, Apple and Microsoft, and with a top 10 that made up 57% of assets.
- Growth-focused savers who don't need income from this holding. The yield was 0.81% as of October 27, 2026, paid twice a year.
Look elsewhere if
- Cost-conscious investors: the 0.40% expense ratio ranks 8th of 9 among similar funds, whose average is 0.16%.
- People seeking broad global diversification: about 78% is in US stocks, and the fund leaves out small and midsize companies entirely.
- Retirees who may need to sell during a downturn: the fund fell 55.9% in 2008–09 and took about 53 months to recover.
Close alternatives
Matched by holdings overlap from the latest N-PORT reports.
| Fund | Overlap | Cost | Net assets | 1 yr | 3 yr |
|---|---|---|---|---|---|
| IOO this fund | — | 0.4% | $8.47B | +16.9% | +28.1% |
| XLG Invesco S&P 500® Top 50 ETF | 70% | 0.2% | $10.56B | +6.9% | +25.3% |
| OEF iShares S&P 100 ETF | 66% | 0.2% | $20.04B | +8.3% | +23.3% |
| TOPT iShares Top 20 U.S. Stocks ETF | 58% | 0.2% | $657.2M | +12.2% | — |
| VUG Vanguard Growth ETF | 54% | 0.04% | $379.29B | +3.8% | +25.1% |
| MGK Vanguard Mega Cap Growth ETF | 53% | 0.07% | $33.30B | +2.5% | +23.2% |
| SPUS SP Funds S&P 500 Sharia Industry Exclusions… | 51% | 0.45% | $3.14B | +17.2% | +27.5% |
| VV Vanguard Large Cap ETF | 49% | 0.04% | $73.83B | +12.0% | +23.8% |
Questions investors ask
What does IOO invest in?
IOO holds about 100 of the world's largest companies, following the S&P Global 100 index. As of June 30, 2026, NVIDIA was the largest holding at 12.3%. Apple was next at 10.8%, then Microsoft at 7.0% and Amazon at 5.9%. Alphabet's two share classes added about 9.5%. About 78% of assets were in US stocks. The UK, Switzerland, South Korea, Germany and the Netherlands made up most of the rest.
What's the difference between IOO and XLG?
IOO is global, while the Invesco S&P 500 Top 50 ETF (XLG) holds only the largest US companies. IOO also costs twice as much: 0.40% a year versus 0.20%. Their holdings overlap by about 70%. IOO's broader reach has helped lately. As of October 27, 2026, its 1-year price return was 16.9%, versus 6.9% for XLG. Over three years, IOO returned 28.1% a year, versus 25.3% for XLG.
Does IOO pay dividends?
Yes, IOO pays dividends twice a year, but the income is modest. Over the 12 months to October 27, 2026, it paid $1.17 per share, a trailing yield of 0.81%. That low yield reflects the fund's large weights in technology companies, which tend to pay out little of their profits. Investors who need steady income from a holding may find the payout small.
How has IOO performed over 10 years?
As of December 31, 2025, IOO returned 15.41% a year over 10 years, according to its prospectus. Its 5-year return was 16.67% a year, and its 1-year return was 27.05%. Over 10 years it closely matched its index (15.36%). It also beat the S&P Global Broad Market Index (11.28%). It has had losing years too: it fell 16.28% in 2022 and 6.2% in 2018.
Is IOO good for retirement?
IOO may suit retirement savers as a smaller, growth-oriented holding rather than a foundation. It has fallen sharply in the past. It dropped 55.9% in the 2008 crisis and took about 53 months to recover. It also fell 23.5% in 2022. The fund's yield is small, and it costs 0.40% a year. In the SEC's standard example, that comes to $505 over 10 years on $10,000. Past results don't predict future returns.