MGK vs SPYG overlap - what they share and where they differ
MGK and SPYG share 72.8% of their weight across 46 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.
MGK and SPYG
72.8%
46 shared positions
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
SPYG
State Street(R) SPDR(R) Portfolio S&P 500(R) Growth ETF
Reported positions cover 100% of the fund, 145 positions · Jun 30, 2026
Top 10: 59.1%·Holdings of SPYG
Reported positions cover MGK 100%, SPYG 100% of each fund. An overlap cannot exceed the smaller coverage, so a low figure can mean little overlap or thin reporting.
SPYG vs MGK side by side
MGKVANGUARD MEGA CAP GROWTH INDEX FUND
55
stock positions reported to the SEC
4.7% of its weight is in 9 names SPYG does not hold
SPYGState Street(R) SPDR(R) Portfolio S&P 500(R) Growth ETF
145
stock positions reported to the SEC
25.1% of its weight is in 99 names MGK does not hold
Where each fund's weight sits
Largest sectors for both funds
The widest gap is Technology: MGK has 5.2 points more of it.
The figures side by side
| MGK | SPYG | |
|---|---|---|
| Filing date | Jun 30, 2026 | Jun 30, 2026 |
| Stock positions reported | 55 | 145 |
| Weight of the ten largest | 66.9% | 59.1% |
| Largest position | NVDA 13.3% | NVDA 13.7% |
| Held alone | 9 positions, 4.7% | 99 positions, 25.1% |
| Covered by stock positions | 100% | 100% |
Holdings they share
| Stock | In MGK | In SPYG | Counted |
|---|---|---|---|
| NVDANVIDIA Corp | 13.27% | 13.65% | 13.27% |
| GOOGLAlphabet Inc | 10.58% | 10.60% | 10.58% |
| MSFTMicrosoft Corp | 7.50% | 7.80% | 7.50% |
| AAPLApple Inc | 12.17% | 5.99% | 5.99% |
| AVGOBroadcom Inc | 4.27% | 5.04% | 4.27% |
| AMZNAmazon.com Inc | 4.46% | 3.48% | 3.48% |
| METAMeta Platforms Inc | 4.08% | 3.48% | 3.48% |
| AMDAdvanced Micro Devices Inc | 3.19% | 2.67% | 2.67% |
| LLYEli Lilly & Co | 3.40% | 2.67% | 2.67% |
| TSLATesla Inc | 3.93% | 2.07% | 2.07% |
What each holds alone
The heaviest positions one fund reports and the other does not.
Only in MGK
Only in SPYG
Questions people ask
Is MGK the same as SPYG?
72.8% of their weight sits in the same 46 holdings. MGK also reports INTC, VRTX, WDC, which the other does not. SPYG also reports MU, BRK.A, JPMORGAN CHASE & CO, which the other does not.
How is the overlap between MGK and SPYG 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 MGK and 100% of SPYG, so the number cannot exceed the smaller coverage.
Which holds more, SPYG or MGK?
MGK reports 55 stock positions and SPYG reports 145. 4.7% of MGK's weight sits in names SPYG does not hold, and 25.1% of SPYG's weight in names MGK does not hold. The ten largest positions are 66.9% of MGK and 59.1% of SPYG.
How do MGK and SPYG differ by sector?
The widest gap is Technology: MGK has 5.2 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
MGK against other funds in the table
SPYG 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.