ACWI vs IWB overlap - what they share and where they differ
ACWI and IWB share 63.4% of their weight across 539 common positions, read from what each fund reported to the SEC.
Each week Ploutos reads the reported positions of the largest US equity ETFs and measures, pair by pair, the weight they share: for every stock both funds hold, the smaller of the two weights counts. Two funds tracking the same index land near 100%. A sector fund inside a broad index fund lands at roughly that sector's weight.
ACWI and IWB
63.4%
539 shared positions
ACWI
iShares MSCI ACWI ETF
Reported positions cover 99% of the fund, 2,068 positions · Jul 31, 2026
Top 10: 25.0%·Holdings of ACWI
IWB
iShares Russell 1000 ETF
Reported positions cover 100% of the fund, 1,011 positions · Jun 30, 2026
Top 10: 34.8%·Holdings of IWB
Reported positions cover ACWI 99%, IWB 100% of each fund. An overlap cannot exceed the smaller coverage, so a low figure can mean little overlap or thin reporting.
IWB vs ACWI side by side
ACWIiShares MSCI ACWI ETF
2,068
stock positions reported to the SEC
35.5% of its weight is in 1,529 names IWB does not hold
IWBiShares Russell 1000 ETF
1,011
stock positions reported to the SEC
6.2% of its weight is in 472 names ACWI does not hold
Where each fund's weight sits
Largest sectors for both funds
The widest gap is Technology: IWB has 11.1 points more of it.
The figures side by side
| ACWI | IWB | |
|---|---|---|
| Filing date | Jul 31, 2026 | Jun 30, 2026 |
| Stock positions reported | 2,068 | 1,011 |
| Weight of the ten largest | 25.0% | 34.8% |
| Largest position | NVDA 4.6% | NVDA 6.7% |
| Held alone | 1,529 positions, 35.5% | 472 positions, 6.2% |
| Covered by stock positions | 99% | 100% |
Holdings they share
| Stock | In ACWI | In IWB | Counted |
|---|---|---|---|
| NVDANVIDIA CORPORATION | 4.56% | 6.72% | 4.56% |
| AAPLAPPLE INC. | 4.46% | 6.03% | 4.46% |
| GOOGLALPHABET INC. | 3.66% | 5.42% | 3.66% |
| MSFTMICROSOFT CORPORATION | 3.22% | 3.99% | 3.22% |
| AMZNAMAZON.COM, INC. | 2.58% | 3.33% | 2.58% |
| AVGOBROADCOM INC. | 1.72% | 2.53% | 1.72% |
| METAMETA PLATFORMS, INC. | 1.20% | 1.78% | 1.20% |
| JPMJPMORGAN CHASE & CO. | 0.93% | 1.26% | 0.93% |
| LLYELI LILLY AND COMPANY | 0.91% | 1.38% | 0.91% |
| MUMICRON TECHNOLOGY, INC. | 0.91% | 1.87% | 0.91% |
What each holds alone
The heaviest positions one fund reports and the other does not.
Only in ACWI
Only in IWB
Questions people ask
Is ACWI the same as IWB?
63.4% of their weight sits in the same 539 holdings. ACWI also reports TSM, SAMSUNG ELECTRONICS CO., LTD., ASML, which the other does not. IWB also reports SNDK, ATI, CRS, which the other does not.
How is the overlap between ACWI and IWB measured?
For every stock both funds report, the smaller of the two weights counts, and the sum is the overlap. The reported positions cover 99% of ACWI and 100% of IWB, so the number cannot exceed the smaller coverage.
Which holds more, IWB or ACWI?
ACWI reports 2,068 stock positions and IWB reports 1,011. 35.5% of ACWI's weight sits in names IWB does not hold, and 6.2% of IWB's weight in names ACWI does not hold. The ten largest positions are 25.0% of ACWI and 34.8% of IWB.
How do ACWI and IWB differ by sector?
The widest gap is Technology: IWB has 11.1 points more of it. Sectors come from each holding's SIC code in its SEC record, summed by the weight the fund reports.
Where do the numbers come from?
From each fund's own N-PORT filing to the SEC, which lists every position and its weight. The comparison uses every equity position the fund reports; cash, futures and bonds are not counted, which is why a coverage figure sits next to every result. Holdings change between filings.
Other pairs with these funds
ACWI against other funds in the table
IWB against other funds in the table
Add a third fund in the tool·All fund pairs
Descriptive data from public SEC filings. Nothing on this page is a recommendation to buy, sell or hold any fund or stock, and holdings change between filings.