DIA vs ITB overlap - what they share and where they differ
DIA and ITB share 8.1% of their weight across 2 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.
DIA and ITB
8.1%
2 shared positions
DIA
DIA
Reported positions cover 100% of the fund, 30 positions · Apr 30, 2026
Top 10: 56.5%·Holdings of DIA
ITB
iShares U.S. Home Construction ETF
Reported positions cover 99% of the fund, 44 positions · Jun 30, 2026
Top 10: 64.4%·Holdings of ITB
Reported positions cover DIA 100%, ITB 99% of each fund. An overlap cannot exceed the smaller coverage, so a low figure can mean little overlap or thin reporting.
ITB vs DIA side by side
DIA
30
stock positions reported to the SEC
91.9% of its weight is in 28 names ITB does not hold
ITBiShares U.S. Home Construction ETF
44
stock positions reported to the SEC
90.5% of its weight is in 42 names DIA does not hold
Where each fund's weight sits
Largest sectors for both funds
The widest gap is Industrials: ITB has 56.7 points more of it.
The figures side by side
| DIA | ITB | |
|---|---|---|
| Filing date | Apr 30, 2026 | Jun 30, 2026 |
| Stock positions reported | 30 | 44 |
| Weight of the ten largest | 56.5% | 64.4% |
| Largest position | GS 11.5% | DHI 15.7% |
| Held alone | 28 positions, 91.9% | 42 positions, 90.5% |
| Covered by stock positions | 100% | 99% |
Holdings they share
| Stock | In DIA | In ITB | Counted |
|---|---|---|---|
| HDHome Depot Inc/The | 4.08% | 4.42% | 4.08% |
| SHWSherwin-Williams Co/The | 3.99% | 4.53% | 3.99% |
What each holds alone
The heaviest positions one fund reports and the other does not.
Only in DIA
Only in ITB
Questions people ask
Is DIA the same as ITB?
8.1% of their weight sits in the same 2 holdings. DIA also reports GS, CAT, MSFT, which the other does not. ITB also reports DHI, PHM, LEN, which the other does not.
How is the overlap between DIA and ITB measured?
For every stock both funds report, the smaller of the two weights counts, and the sum is the overlap. The reported positions cover 100% of DIA and 99% of ITB, so the number cannot exceed the smaller coverage.
Which holds more, ITB or DIA?
DIA reports 30 stock positions and ITB reports 44. 91.9% of DIA's weight sits in names ITB does not hold, and 90.5% of ITB's weight in names DIA does not hold. The ten largest positions are 56.5% of DIA and 64.4% of ITB.
How do DIA and ITB differ by sector?
The widest gap is Industrials: ITB has 56.7 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.
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.