DIA vs MGV overlap - what they share and where they differ
DIA and MGV share 28.3% of their weight across 24 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 MGV
28.3%
24 shared positions
DIA
DIA
Reported positions cover 100% of the fund, 30 positions · Apr 30, 2026
Top 10: 56.5%·Holdings of DIA
MGV
VANGUARD MEGA CAP VALUE INDEX FUND
Reported positions cover 100% of the fund, 119 positions · May 31, 2026
Top 10: 29.3%·Holdings of MGV
Reported positions cover DIA 100%, MGV 100% of each fund. An overlap cannot exceed the smaller coverage, so a low figure can mean little overlap or thin reporting.
MGV vs DIA side by side
DIA
30
stock positions reported to the SEC
21.1% of its weight is in 6 names MGV does not hold
MGVVANGUARD MEGA CAP VALUE INDEX FUND
119
stock positions reported to the SEC
68.9% of its weight is in 95 names DIA does not hold
Where each fund's weight sits
Largest sectors for both funds
The widest gap is Consumer Cyclical: DIA has 15.6 points more of it.
The figures side by side
| DIA | MGV | |
|---|---|---|
| Filing date | Apr 30, 2026 | May 31, 2026 |
| Stock positions reported | 30 | 119 |
| Weight of the ten largest | 56.5% | 29.3% |
| Largest position | GS 11.5% | MU 5.3% |
| Held alone | 6 positions, 21.1% | 95 positions, 68.9% |
| Covered by stock positions | 100% | 100% |
Holdings they share
| Stock | In DIA | In MGV | Counted |
|---|---|---|---|
| JPMORGAN CHASE & CO | 3.88% | 3.64% | 3.64% |
| JNJJohnson & Johnson | 2.85% | 2.61% | 2.61% |
| CATCaterpillar Inc | 11.03% | 1.96% | 1.96% |
| CVXChevron Corp | 2.40% | 1.66% | 1.66% |
| UNHUnitedHealth Group Inc | 4.59% | 1.66% | 1.66% |
| WMTWalmart Inc | 1.64% | 2.44% | 1.64% |
| PGProcter & Gamble Co/The | 1.82% | 1.60% | 1.60% |
| HDHome Depot Inc/The | 4.08% | 1.52% | 1.52% |
| GSGoldman Sachs Group Inc/The | 11.45% | 1.39% | 1.39% |
| MRKMerck & Co Inc | 1.35% | 1.41% | 1.35% |
What each holds alone
The heaviest positions one fund reports and the other does not.
Only in DIA
Only in MGV
Questions people ask
Is DIA the same as MGV?
28.3% of their weight sits in the same 24 holdings. DIA also reports MSFT, V, AAPL, which the other does not. MGV also reports MU, BRK.A, EXXON MOBIL CORP, which the other does not.
How is the overlap between DIA and MGV 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 MGV, so the number cannot exceed the smaller coverage.
Which holds more, MGV or DIA?
DIA reports 30 stock positions and MGV reports 119. 21.1% of DIA's weight sits in names MGV does not hold, and 68.9% of MGV's weight in names DIA does not hold. The ten largest positions are 56.5% of DIA and 29.3% of MGV.
How do DIA and MGV differ by sector?
The widest gap is Consumer Cyclical: DIA has 15.6 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.