IWY vs MGK overlap - what they share and where they differ
IWY and MGK share 76.6% of their weight across 44 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.
IWY and MGK
76.6%
44 shared positions
IWY
iShares Russell Top 200 Growth ETF
Reported positions cover 100% of the fund, 100 positions · Jun 30, 2026
Top 10: 62.8%·Holdings of IWY
MGK
VANGUARD MEGA CAP GROWTH INDEX FUND
Reported positions cover 100% of the fund, 55 positions · Jun 30, 2026
Top 10: 66.9%·Holdings of MGK
Reported positions cover IWY 100%, MGK 100% of each fund. An overlap cannot exceed the smaller coverage, so a low figure can mean little overlap or thin reporting.
MGK vs IWY side by side
IWYiShares Russell Top 200 Growth ETF
100
stock positions reported to the SEC
18.1% of its weight is in 56 names MGK does not hold
MGKVANGUARD MEGA CAP GROWTH INDEX FUND
55
stock positions reported to the SEC
6.0% of its weight is in 11 names IWY does not hold
Where each fund's weight sits
Largest sectors for both funds
The widest gap is Consumer Cyclical: MGK has 2.2 points more of it.
The figures side by side
| IWY | MGK | |
|---|---|---|
| Filing date | Jun 30, 2026 | Jun 30, 2026 |
| Stock positions reported | 100 | 55 |
| Weight of the ten largest | 62.8% | 66.9% |
| Largest position | NVDA 14.2% | NVDA 13.3% |
| Held alone | 56 positions, 18.1% | 11 positions, 6.0% |
| Covered by stock positions | 100% | 100% |
Holdings they share
| Stock | In IWY | In MGK | Counted |
|---|---|---|---|
| NVDANVIDIA CORP | 14.16% | 13.27% | 13.27% |
| GOOGLALPHABET INC | 11.51% | 10.58% | 10.58% |
| AAPLAPPLE INC | 7.14% | 12.17% | 7.14% |
| MSFTMICROSOFT CORP | 4.56% | 7.50% | 4.56% |
| AVGOBROADCOM INC | 5.64% | 4.27% | 4.27% |
| TSLATESLA INC | 4.59% | 3.93% | 3.93% |
| METAMETA PLATFORMS INC | 3.68% | 4.08% | 3.68% |
| LLYELI LILLY & COMPANY | 3.35% | 3.40% | 3.35% |
| AMDADVANCED MICRO DEVICES INC | 3.25% | 3.19% | 3.19% |
| LRCXLAM RESEARCH CORP | 1.86% | 1.92% | 1.86% |
What each holds alone
The heaviest positions one fund reports and the other does not.
Only in IWY
Only in MGK
Questions people ask
Is IWY the same as MGK?
76.6% of their weight sits in the same 44 holdings. IWY also reports MU, CAT, GE, which the other does not. MGK also reports INTC, WELL, TJX COS INC/THE, which the other does not.
How is the overlap between IWY and MGK 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 IWY and 100% of MGK, so the number cannot exceed the smaller coverage.
Which holds more, MGK or IWY?
IWY reports 100 stock positions and MGK reports 55. 18.1% of IWY's weight sits in names MGK does not hold, and 6.0% of MGK's weight in names IWY does not hold. The ten largest positions are 62.8% of IWY and 66.9% of MGK.
How do IWY and MGK differ by sector?
The widest gap is Consumer Cyclical: MGK has 2.2 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
IWY against other funds in the table
MGK 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.