Data as of Sep 12, 2026. Both funds on the fields they both publish, from the same sources.
IWF vs MGK: how they differ
IWF and MGK hold 72% of their weight in the same names, and MGK returned more over the year.
iShares Russell 1000 Growth ETF and Vanguard Mega Cap Growth Index Fund.
What they hold in common
By the books each fund has filed, IWF and MGK hold 72% of their money in the same securities at the same weight.
| Holding | IWF | MGK |
|---|---|---|
| NVIDIA CORPORATION | 13.85% | 13.29% |
| APPLE INC. | 6.72% | 12.19% |
| ALPHABET INC. | 6.18% | 5.93% |
| ALPHABET INC. | 4.98% | 4.67% |
| BROADCOM INC. | 5.21% | 4.28% |
| MICROSOFT CORPORATION | 4.11% | 7.52% |
| TESLA, INC. | 3.65% | 3.93% |
| META PLATFORMS, INC. | 3.01% | 4.08% |
| ELI LILLY AND COMPANY | 2.84% | 3.41% |
| ADVANCED MICRO DEVICES, INC. | 2.80% | 3.20% |
| VISA INC. | 1.68% | 1.82% |
| LAM RESEARCH CORPORATION | 1.61% | 1.93% |
| Only in IWF | Only in MGK |
|---|---|
| MICRON TECHNOLOGY, INC. 3.86% | Intel Corp 1.10% |
| CATERPILLAR INC. 1.44% | Welltower Inc 0.71% |
| GENERAL ELECTRIC COMPANY 1.15% | Vertex Pharmaceuticals Inc 0.60% |
| TEXAS INSTRUMENTS INCORPORATED 0.80% | Seagate Technology Holdings PLC 0.51% |
| THE HOME DEPOT, INC. 0.77% | Equinix Inc 0.50% |
| COSTCO WHOLESALE CORPORATION 0.54% | Synopsys Inc 0.45% |
| AMGEN INC. 0.41% | O'Reilly Automotive Inc 0.43% |
| VERTIV HOLDINGS CO 0.38% | Ecolab Inc 0.42% |
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.
| IWF iShares Russell 1000 Growth ETF | MGK Vanguard Mega Cap Growth Index Fund | |
|---|---|---|
| Where it sits | Core index fund | Core index fund |
| Issuer | iShares | Vanguard |
| What it is | Russell 1000 growth | Mega Cap Growth |
| Total return, 1 year | +7.0% | +14.9% |
| S&P 500 over the same days | +17.5% | +17.5% |
| Gap to the S&P 500 | −10.5 pts | −2.6 pts |
| Expense ratio | 0.18% | 0.07% |
| Already in the S&P 500 | 93.6% | 99.2% |
| Holdings | 368 | 56 |
IWF in plain words
IWF is an index equity fund tracking the Russell 1000 growth. Over the year to Sep 11, 2026 it returned +7.0% with distributions reinvested, against +17.5% for the S&P 500 and +23.0% for the Nasdaq-100. The prospectus expense ratio is 0.18% a year. By its holdings filed for Jun 30, 2026, 94% of the fund by weight is stocks the S&P 500 also holds, across 368 positions, with the top ten at 54.4%. It sat 5.0% below its high of Jun 1, 2026 on Sep 11, 2026.
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, IWF or MGK?
- In the year to Sep 12, 2026, with distributions reinvested, IWF returned +7.0% and MGK returned +14.9%, so MGK returned more. One year is one year; the longer windows are in the table.
- Which is cheaper, IWF or MGK?
- IWF charges 0.18% a year and MGK charges 0.07%, so MGK is cheaper. Fees come from each fund's prospectus.
- How much do IWF and MGK overlap with the S&P 500?
- By their latest filed holdings, 94% of IWF and 99% of MGK by weight is stocks the S&P 500 already holds. Between the two funds, 72% 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, IWF against MGK, data as of Sep 12, 2026. https://etfiq.com/compare/any/IWF-MGK Free to use with attribution; the underlying files are at Open data.
A comparison is not a recommendation. Standards and sources