Data as of Sep 12, 2026. Both funds on the fields they both publish, from the same sources.
IYW vs MGK: how they differ
IYW and MGK hold 66% of their weight in the same names, and IYW returned more over the year.
iShares U.S. Technology ETF and Vanguard Mega Cap Growth Index Fund.
What they hold in common
By the books each fund has filed, IYW and MGK hold 66% of their money in the same securities at the same weight.
| Holding | IYW | MGK |
|---|---|---|
| NVIDIA CORPORATION | 16.25% | 13.29% |
| APPLE INC. | 13.65% | 12.19% |
| ALPHABET INC. | 7.84% | 5.93% |
| ALPHABET INC. | 6.34% | 4.67% |
| MICROSOFT CORPORATION | 3.99% | 7.52% |
| BROADCOM INC. | 3.78% | 4.28% |
| ADVANCED MICRO DEVICES, INC. | 3.50% | 3.20% |
| META PLATFORMS, INC. | 2.81% | 4.08% |
| LAM RESEARCH CORPORATION | 1.99% | 1.93% |
| KLA CORPORATION | 1.41% | 1.48% |
| APPLIED MATERIALS, INC. | 1.92% | 1.13% |
| INTEL CORPORATION | 2.56% | 1.10% |
| Only in IYW | Only in MGK |
|---|---|
| MICRON TECHNOLOGY, INC. 2.98% | Amazon.com Inc 4.47% |
| TEXAS INSTRUMENTS INCORPORATED 1.57% | Tesla Inc 3.93% |
| INTERNATIONAL BUSINESS MACHINES CORPORAT 1.32% | Eli Lilly & Co 3.41% |
| ANALOG DEVICES, INC. 1.21% | Visa Inc 1.82% |
| QUALCOMM INCORPORATED 1.18% | Mastercard Inc 1.47% |
| SALESFORCE, INC. 0.99% | GE Vernova Inc 1.21% |
| VERTIV HOLDINGS CO 0.77% | Netflix Inc 1.12% |
| ADOBE INC. 0.62% | Arista Networks Inc 0.77% |
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.
| IYW iShares U.S. Technology ETF | MGK Vanguard Mega Cap Growth Index Fund | |
|---|---|---|
| Where it sits | Core index fund | Core index fund |
| Issuer | iShares | Vanguard |
| What it is | U.S. Technology | Mega Cap Growth |
| Total return, 1 year | +34.9% | +14.9% |
| S&P 500 over the same days | +17.5% | +17.5% |
| Gap to the S&P 500 | +17.4 pts | −2.6 pts |
| Expense ratio | 0.37% | 0.07% |
| Already in the S&P 500 | 95.5% | 99.2% |
| Holdings | 139 | 56 |
IYW in plain words
IYW is an index equity fund tracking the U.S. Technology. Over the year to Sep 11, 2026 it returned +34.9% with distributions reinvested, against +17.5% for the S&P 500 and +23.0% for the Nasdaq-100. The prospectus expense ratio is 0.37% a year. By its holdings filed for Apr 30, 2026, 96% of the fund by weight is stocks the S&P 500 also holds, across 139 positions, with the top ten at 63.7%.
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, IYW or MGK?
- In the year to Sep 12, 2026, with distributions reinvested, IYW returned +34.9% and MGK returned +14.9%, so IYW returned more. One year is one year; the longer windows are in the table.
- Which is cheaper, IYW or MGK?
- IYW charges 0.37% a year and MGK charges 0.07%, so MGK is cheaper. Fees come from each fund's prospectus.
- How much do IYW and MGK overlap with the S&P 500?
- By their latest filed holdings, 96% of IYW and 99% of MGK by weight is stocks the S&P 500 already holds. Between the two funds, 66% 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, IYW against MGK, data as of Sep 12, 2026. https://etfiq.com/compare/any/IYW-MGK Free to use with attribution; the underlying files are at Open data.
A comparison is not a recommendation. Standards and sources