Data as of Sep 13, 2026. Both funds on the fields they both publish, from the same sources.
IVV vs MGK: how they differ
IVV and MGK hold 0% of their weight in the same names, and IVV returned more over the year.
iShares Core S&P 500 ETF and Vanguard Mega Cap Growth Index Fund.
What they hold in common
By the books each fund has filed, IVV and MGK hold 0% of their money in the same securities at the same weight.
| Only in IVV | Only in MGK |
|---|---|
| NVIDIA 8.06% | NVIDIA Corp 13.29% |
| APPLE 7.31% | Apple Inc 12.19% |
| MICROSOFT 5.58% | Microsoft Corp 7.52% |
| AMAZON.COM INC 3.76% | Alphabet Inc 5.93% |
| ALPHABET CLASS A 2.98% | Alphabet Inc 4.67% |
| BROADCOM INC 2.61% | Amazon.com Inc 4.47% |
| ALPHABET CLASS C 2.38% | Broadcom Inc 4.28% |
| META PLATFORMS CLASS A 2.16% | Meta Platforms Inc 4.08% |
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 and Sep 10, 2026.
| IVV iShares Core S&P 500 ETF | MGK Vanguard Mega Cap Growth Index Fund | |
|---|---|---|
| Where it sits | Core index fund | Core index fund |
| Issuer | iShares | Vanguard |
| What it is | S&P 500 | Mega Cap Growth |
| Total return, 1 year | +17.6% | +14.9% |
| S&P 500 over the same days | +17.5% | +17.5% |
| Gap to the S&P 500 | +0.1 pts | −2.6 pts |
| Expense ratio | 0.03% | 0.07% |
| Already in the S&P 500 | 100.0% | 99.2% |
| Holdings | 505 | 56 |
IVV in plain words
IVV is an index equity fund tracking the S&P 500. Over the year to Sep 11, 2026 it returned +17.6% with distributions reinvested, against +17.5% for the S&P 500 and +23.0% for the Nasdaq-100. The prospectus expense ratio is 0.03% a year. By its holdings filed for Sep 10, 2026, 100% of the fund by weight is stocks the S&P 500 also holds, across 505 positions, with the top ten at 38.1%.
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%.
Questions people ask
- Which returned more over the last year, IVV or MGK?
- In the year to Sep 13, 2026, with distributions reinvested, IVV returned +17.6% and MGK returned +14.9%, so IVV returned more. One year is one year; the longer windows are in the table.
- Which is cheaper, IVV or MGK?
- IVV charges 0.03% a year and MGK charges 0.07%, so IVV is cheaper. Fees come from each fund's prospectus.
- How much do IVV and MGK overlap with the S&P 500?
- By their latest filed holdings, 100% of IVV and 99% of MGK by weight is stocks the S&P 500 already holds. Between the two funds, 0% of their books are the same securities at the same weight.
Other comparisons
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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, IVV against MGK, data as of Sep 13, 2026. https://etfiq.com/compare/any/ivv-vs-mgk Free to use with attribution; the underlying files are at Open data.
A comparison is not a recommendation. Standards and sources