Data as of Sep 12, 2026. Both funds on the fields they both publish, from the same sources.
MGK vs RSP: how they differ
MGK and RSP hold 11% of their weight in the same names.
Vanguard Mega Cap Growth Index Fund and Invesco S&P 500 Equal Weight ETF.
What they hold in common
By the books each fund has filed, MGK and RSP hold 11% of their money in the same securities at the same weight.
| Holding | MGK | RSP |
|---|---|---|
| Intel Corp | 1.10% | 0.38% |
| Seagate Technology Holdings PLC | 0.51% | 0.34% |
| Advanced Micro Devices Inc | 3.20% | 0.33% |
| Sandisk Corp | 1.28% | 0.32% |
| Western Digital Corp | 0.52% | 0.31% |
| GE Vernova Inc | 1.21% | 0.25% |
| Amazon.com Inc | 4.47% | 0.24% |
| Arista Networks Inc | 0.77% | 0.24% |
| Corning Inc | 0.90% | 0.24% |
| Broadcom Inc | 4.28% | 0.24% |
| KLA Corp | 1.48% | 0.23% |
| Lam Research Corp | 1.93% | 0.23% |
| Only in MGK | Only in RSP |
|---|---|
| Marvell Technology Inc 1.03% | ON Semiconductor Corp. 0.33% |
| Space Exploration Technologies Corp 0.48% | Ciena Corp. 0.30% |
| Snowflake Inc 0.34% | Monolithic Power Systems, Inc. 0.29% |
| Centene Corp. 0.29% | |
| NXP Semiconductors N.V. 0.28% | |
| Dell Technologies Inc. 0.27% | |
| Microchip Technology Inc. 0.27% | |
| Texas Instruments Inc. 0.27% |
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 Apr 30, 2026 and Jun 30, 2026.
| MGK Vanguard Mega Cap Growth Index Fund | RSP Invesco S&P 500 Equal Weight ETF | |
|---|---|---|
| Where it sits | Core index fund | Core index fund |
| Issuer | Vanguard | Invesco |
| What it is | Mega Cap Growth | S&P 500 equal weight |
| Total return, 1 year | +14.9% | +14.8% |
| S&P 500 over the same days | +17.5% | +17.5% |
| Gap to the S&P 500 | −2.6 pts | −2.7 pts |
| Expense ratio | 0.07% | 0.20% |
| Already in the S&P 500 | 99.2% | 99.1% |
| Holdings | 56 | 503 |
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%.
RSP in plain words
RSP is an index equity fund tracking the S&P 500 equal weight. Over the year to Sep 11, 2026 it returned +14.8% with distributions reinvested, against +17.5% for the S&P 500 and +23.0% for the Nasdaq-100. The prospectus expense ratio is 0.20% a year. By its holdings filed for Apr 30, 2026, 99% of the fund by weight is stocks the S&P 500 also holds, across 503 positions, with the top ten at 3.2%. It sat 3.5% below its high of Aug 14, 2026 on Sep 11, 2026.
Questions people ask
- Which returned more over the last year, MGK or RSP?
- In the year to Sep 12, 2026, with distributions reinvested, MGK returned +14.9% and RSP returned +14.8%, so MGK returned more. One year is one year; the longer windows are in the table.
- Which is cheaper, MGK or RSP?
- MGK charges 0.07% a year and RSP charges 0.20%, so MGK is cheaper. Fees come from each fund's prospectus.
- How much do MGK and RSP overlap with the S&P 500?
- By their latest filed holdings, 99% of MGK and 99% of RSP by weight is stocks the S&P 500 already holds. Between the two funds, 11% 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 RSP, data as of Sep 12, 2026. https://etfiq.com/compare/any/MGK-RSP Free to use with attribution; the underlying files are at Open data.
A comparison is not a recommendation. Standards and sources