Data as of Sep 12, 2026. Both funds on the fields they both publish, from the same sources.
MGK vs SPY: how they differ
MGK and SPY hold 51% of their weight in the same names, and SPY returned more over the year.
Vanguard Mega Cap Growth Index Fund and SPDR S&P 500 ETF Trust.
What they hold in common
By the books each fund has filed, MGK and SPY hold 51% of their money in the same securities at the same weight.
| Holding | MGK | SPY |
|---|---|---|
| NVIDIA Corp | 13.29% | 7.52% |
| Apple Inc | 12.19% | 6.59% |
| Microsoft Corp | 7.52% | 4.30% |
| Amazon.com Inc | 4.47% | 3.62% |
| Alphabet Inc | 5.93% | 3.25% |
| Broadcom Inc | 4.28% | 2.77% |
| Alphabet Inc | 4.67% | 2.59% |
| Meta Platforms Inc | 4.08% | 1.92% |
| Tesla Inc | 3.93% | 1.84% |
| Eli Lilly & Co | 3.41% | 1.47% |
| Advanced Micro Devices Inc | 3.20% | 1.47% |
| Intel Corp | 1.10% | 1.02% |
| Only in MGK | Only in SPY |
|---|---|
| Seagate Technology Holdings PLC 0.51% | Micron Technology, Inc. 2.02% |
| Space Exploration Technologies Corp 0.48% | Berkshire Hathaway, Inc. 1.42% |
| Snowflake Inc 0.34% | JPMorgan Chase & Co. 1.36% |
| Johnson & Johnson 0.95% | |
| Exxon Mobil Corp. 0.88% | |
| Walmart, Inc. 0.77% | |
| Caterpillar, Inc. 0.76% | |
| Cisco Systems, Inc. 0.72% |
Weight overlap is an ETFIQ calculation: for every security both funds hold, the smaller of the two weights, summed. Above 50%, holding both is close to holding one of them twice. Holdings dated Jun 30, 2026.
| MGK Vanguard Mega Cap Growth Index Fund | SPY SPDR S&P 500 ETF Trust | |
|---|---|---|
| Where it sits | Core index fund | Core index fund |
| Issuer | Vanguard | State Street |
| What it is | Mega Cap Growth | S&P 500, book from IVV |
| Total return, 1 year | +14.9% | +17.5% |
| S&P 500 over the same days | +17.5% | +17.5% |
| Gap to the S&P 500 | −2.6 pts | 0.0 pts |
| Expense ratio | 0.07% | 0.09% |
| Already in the S&P 500 | 99.2% | 100.0% |
| Holdings | 56 | 504 |
MGK in plain words
MGK is an index equity fund tracking the Mega Cap Growth. Over the year to Sep 11, 2026 it returned +14.9% with distributions reinvested, against +17.5% for the S&P 500 and +23.0% for the Nasdaq-100. The prospectus expense ratio is 0.07% a year. By its holdings filed for Jun 30, 2026, 99% of the fund by weight is stocks the S&P 500 also holds, across 56 positions, with the top ten at 63.8%.
SPY in plain words
SPY is an index equity fund tracking the S&P 500. Over the year to Sep 11, 2026 it returned +17.5% with distributions reinvested, against +17.5% for the S&P 500 and +23.0% for the Nasdaq-100. The prospectus expense ratio is 0.09% a year. By its holdings filed for Jun 30, 2026, 100% of the fund by weight is stocks the S&P 500 also holds, across 504 positions, with the top ten at 36.4%.
Questions people ask
- Which returned more over the last year, MGK or SPY?
- In the year to Sep 12, 2026, with distributions reinvested, MGK returned +14.9% and SPY returned +17.5%, so SPY returned more. One year is one year; the longer windows are in the table.
- Which is cheaper, MGK or SPY?
- MGK charges 0.07% a year and SPY charges 0.09%, so MGK is cheaper. Fees come from each fund's prospectus.
- How much do MGK and SPY overlap with the S&P 500?
- By their latest filed holdings, 99% of MGK and 100% of SPY by weight is stocks the S&P 500 already holds. Between the two funds, 51% of their books are the same securities at the same weight.
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Where these figures came from
ETFIQ links to the documents behind every figure. It is not affiliated with any issuer, and a link is not an endorsement.
Cite this page. ETFIQ, MGK against SPY, data as of Sep 12, 2026. https://etfiq.com/compare/any/MGK-SPY Free to use with attribution; the underlying files are at Open data.
A comparison is not a recommendation. Standards and sources