IUSG vs VOOG overlap - what they share and where they differ
IUSG and VOOG share 88.1% of their weight across 139 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 VOOG
88.1%
139 shared positions
IUSG
iShares Core S&P U.S. Growth ETF
Reported positions cover 100% of the fund, 369 positions · Jun 30, 2026
Top 10: 56.1%·Holdings of IUSG
VOOG
VANGUARD S&P 500 GROWTH INDEX FUND
Reported positions cover 100% of the fund, 143 positions · May 31, 2026
Top 10: 62.5%·Holdings of VOOG
Reported positions cover IUSG 100%, VOOG 100% of each fund. An overlap cannot exceed the smaller coverage, so a low figure can mean little overlap or thin reporting.
VOOG vs IUSG side by side
IUSGiShares Core S&P U.S. Growth ETF
369
stock positions reported to the SEC
8.8% of its weight is in 230 names VOOG does not hold
VOOGVANGUARD S&P 500 GROWTH INDEX FUND
143
stock positions reported to the SEC
2.9% of its weight is in 4 names IUSG does not hold
Where each fund's weight sits
Largest sectors for both funds
The widest gap is Financial Services: IUSG has 1.8 points more of it.
The figures side by side
| IUSG | VOOG | |
|---|---|---|
| Filing date | Jun 30, 2026 | May 31, 2026 |
| Stock positions reported | 369 | 143 |
| Weight of the ten largest | 56.1% | 62.5% |
| Largest position | NVDA 13.0% | NVDA 14.3% |
| Held alone | 230 positions, 8.8% | 4 positions, 2.9% |
| Covered by stock positions | 100% | 100% |
Holdings they share
| Stock | In IUSG | In VOOG | Counted |
|---|---|---|---|
| NVDANVIDIA CORP | 12.95% | 14.26% | 12.95% |
| GOOGLALPHABET INC | 10.06% | 11.05% | 10.06% |
| MSFTMICROSOFT CORP | 7.41% | 9.29% | 7.41% |
| AAPLAPPLE INC | 5.68% | 6.37% | 5.68% |
| AVGOBROADCOM INC | 4.78% | 5.89% | 4.78% |
| AMZNAMAZON.COM INC | 3.31% | 3.90% | 3.31% |
| METAMETA PLATFORMS INC | 3.31% | 3.85% | 3.31% |
| MUMICRON TECHNOLOGY INC | 3.48% | 3.04% | 3.04% |
| LLYELI LILLY & COMPANY | 2.54% | 2.43% | 2.43% |
| BRK.ABERKSHIRE HATHAWAY INC | 2.45% | 2.42% | 2.42% |
What each holds alone
The heaviest positions one fund reports and the other does not.
Only in IUSG
Only in VOOG
Questions people ask
Is IUSG the same as VOOG?
88.1% of their weight sits in the same 139 holdings. IUSG also reports JPM, SNDK, GE, which the other does not. VOOG also reports JPMORGAN CHASE & CO, SANDISK CORP/DE, GENERAL ELECTRIC CO, which the other does not.
How is the overlap between IUSG and VOOG 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 VOOG, so the number cannot exceed the smaller coverage.
Which holds more, VOOG or IUSG?
IUSG reports 369 stock positions and VOOG reports 143. 8.8% of IUSG's weight sits in names VOOG does not hold, and 2.9% of VOOG's weight in names IUSG does not hold. The ten largest positions are 56.1% of IUSG and 62.5% of VOOG.
How do IUSG and VOOG differ by sector?
The widest gap is Financial Services: IUSG has 1.8 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
VOOG 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.