IUSG vs VUG overlap - what they share and where they differ
IUSG and VUG share 75.0% of their weight across 88 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.
IUSG and VUG
75.0%
88 shared positions
IUSG
iShares Core S&P U.S. Growth ETF
Reported positions cover 100% of the fund, 388 positions · Jun 30, 2026
Top 10: 56.1%·Holdings of IUSG
VUG
VANGUARD GROWTH INDEX FUND
Reported positions cover 100% of the fund, 144 positions · Jun 30, 2026
Top 10: 63.1%·Holdings of VUG
Reported positions cover IUSG 100%, VUG 100% of each fund. An overlap cannot exceed the smaller coverage, so a low figure can mean little overlap or thin reporting.
VUG vs IUSG side by side
IUSGiShares Core S&P U.S. Growth ETF
388
stock positions reported to the SEC
23.6% of its weight is in 300 names VUG does not hold
VUGVANGUARD GROWTH INDEX FUND
144
stock positions reported to the SEC
9.6% of its weight is in 56 names IUSG does not hold
Where each fund's weight sits
Largest sectors for both funds
The widest gap is Technology: VUG has 6.6 points more of it.
The figures side by side
| IUSG | VUG | |
|---|---|---|
| Filing date | Jun 30, 2026 | Jun 30, 2026 |
| Stock positions reported | 388 | 144 |
| Weight of the ten largest | 56.1% | 63.1% |
| Largest position | NVDA 13.0% | NVDA 12.6% |
| Held alone | 300 positions, 23.6% | 56 positions, 9.6% |
| Covered by stock positions | 100% | 100% |
Holdings they share
| Stock | In IUSG | In VUG | Counted |
|---|---|---|---|
| NVDANVIDIA CORP | 12.95% | 12.63% | 12.63% |
| GOOGLALPHABET INC | 10.07% | 10.29% | 10.07% |
| MSFTMICROSOFT CORP | 7.41% | 7.61% | 7.41% |
| AAPLAPPLE INC | 5.68% | 11.67% | 5.68% |
| AVGOBROADCOM INC | 4.78% | 4.28% | 4.28% |
| AMZNAMAZON.COM INC | 3.31% | 4.47% | 3.31% |
| METAMETA PLATFORMS INC | 3.31% | 3.41% | 3.31% |
| LLYELI LILLY & COMPANY | 2.54% | 2.81% | 2.54% |
| AMDADVANCED MICRO DEVICES INC | 2.53% | 2.62% | 2.53% |
| TSLATESLA INC | 1.96% | 3.27% | 1.96% |
What each holds alone
The heaviest positions one fund reports and the other does not.
Only in IUSG
Only in VUG
Questions people ask
Is IUSG the same as VUG?
75.0% of their weight sits in the same 88 holdings. IUSG also reports MU, BRK.A, JPM, which the other does not. VUG also reports COST, INTC, WDC, which the other does not.
How is the overlap between IUSG and VUG 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 IUSG and 100% of VUG, so the number cannot exceed the smaller coverage.
Which holds more, VUG or IUSG?
IUSG reports 388 stock positions and VUG reports 144. 23.6% of IUSG's weight sits in names VUG does not hold, and 9.6% of VUG's weight in names IUSG does not hold. The ten largest positions are 56.1% of IUSG and 63.1% of VUG.
How do IUSG and VUG differ by sector?
The widest gap is Technology: VUG has 6.6 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.
Other pairs with these funds
IUSG 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.