DIA vs OEF overlap - what they share and where they differ
DIA and OEF share 33.8% of their weight across 28 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 OEF
33.8%
28 shared positions
DIA
DIA
Reported positions cover 100% of the fund, 30 positions · Jul 31, 2026
Top 10: 55.3%·Holdings of DIA
OEF
iShares S&P 100 ETF
Reported positions cover 100% of the fund, 101 positions · Jun 30, 2026
Top 10: 52.8%·Holdings of OEF
Reported positions cover DIA 100%, OEF 100% of each fund. An overlap cannot exceed the smaller coverage, so a low figure can mean little overlap or thin reporting.
OEF vs DIA side by side
DIA
30
stock positions reported to the SEC
8.1% of its weight is in 2 names OEF does not hold
OEFiShares S&P 100 ETF
101
stock positions reported to the SEC
45.4% of its weight is in 73 names DIA does not hold
Where each fund's weight sits
Largest sectors for both funds
The widest gap is Technology: OEF has 33.0 points more of it.
The figures side by side
| DIA | OEF | |
|---|---|---|
| Filing date | Jul 31, 2026 | Jun 30, 2026 |
| Stock positions reported | 30 | 101 |
| Weight of the ten largest | 55.3% | 52.8% |
| Largest position | GS 11.5% | NVDA 10.5% |
| Held alone | 2 positions, 8.1% | 73 positions, 45.4% |
| Covered by stock positions | 100% | 100% |
Holdings they share
| Stock | In DIA | In OEF | Counted |
|---|---|---|---|
| MSFTMicrosoft Corp | 5.26% | 5.99% | 5.26% |
| GOOGLAlphabet Inc | 4.03% | 8.14% | 4.03% |
| AAPLApple Inc | 3.50% | 9.18% | 3.50% |
| AMZNAmazon.com Inc | 3.07% | 5.04% | 3.07% |
| NVDANVIDIA Corp | 2.27% | 10.47% | 2.27% |
| JPMJPMorgan Chase & Co | 3.98% | 1.90% | 1.90% |
| JNJJohnson & Johnson | 2.90% | 1.32% | 1.32% |
| VVisa Inc | 4.14% | 1.23% | 1.23% |
| WMTWalmart Inc | 1.26% | 1.07% | 1.07% |
| CATCaterpillar Inc | 9.22% | 1.06% | 1.06% |
What each holds alone
The heaviest positions one fund reports and the other does not.
Only in DIA
Only in OEF
Questions people ask
Is DIA the same as OEF?
33.8% of their weight sits in the same 28 holdings. DIA also reports TRV, SHW, which the other does not. OEF also reports AVGO, MU, META, which the other does not.
How is the overlap between DIA and OEF 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 100% of OEF, so the number cannot exceed the smaller coverage.
Which holds more, OEF or DIA?
DIA reports 30 stock positions and OEF reports 101. 8.1% of DIA's weight sits in names OEF does not hold, and 45.4% of OEF's weight in names DIA does not hold. The ten largest positions are 55.3% of DIA and 52.8% of OEF.
How do DIA and OEF differ by sector?
The widest gap is Technology: OEF has 33.0 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.
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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.