Data as of Sep 12, 2026. Both funds on the fields they both publish, from the same sources.
IGM vs MGK: how they differ
IGM and MGK hold 62% of their weight in the same names, and IGM returned more over the year.
iShares Expanded Tech Sector ETF and Vanguard Mega Cap Growth Index Fund.
What they hold in common
By the books each fund has filed, IGM and MGK hold 62% of their money in the same securities at the same weight.
| Holding | IGM | MGK |
|---|---|---|
| NVIDIA Corp. | 7.97% | 13.29% |
| Apple, Inc. | 7.92% | 12.19% |
| Microsoft Corp. | 7.50% | 7.52% |
| Alphabet, Inc. | 4.45% | 5.93% |
| Broadcom, Inc. | 7.61% | 4.28% |
| Meta Platforms, Inc. | 4.17% | 4.08% |
| Alphabet, Inc. | 3.55% | 4.67% |
| Advanced Micro Devices, Inc. | 4.13% | 3.20% |
| Lam Research Corp. | 2.37% | 1.93% |
| KLA Corp. | 1.72% | 1.48% |
| Sandisk Corp. | 1.47% | 1.28% |
| Applied Materials, Inc. | 2.50% | 1.13% |
| Only in IGM | Only in MGK |
|---|---|
| Micron Technology, Inc. 5.47% | Amazon.com Inc 4.47% |
| Cisco Systems, Inc. 2.02% | Tesla Inc 3.93% |
| Texas Instruments, Inc. 1.18% | Eli Lilly & Co 3.41% |
| International Business Machines Corp. 1.15% | Visa Inc 1.82% |
| Seagate Technology Holdings plc 0.94% | Mastercard Inc 1.47% |
| QUALCOMM, Inc. 0.85% | GE Vernova Inc 1.21% |
| Analog Devices, Inc. 0.85% | Boeing Co/The 0.72% |
| Shopify, Inc. 0.61% | Welltower Inc 0.71% |
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.
| IGM iShares Expanded Tech Sector ETF | MGK Vanguard Mega Cap Growth Index Fund | |
|---|---|---|
| Where it sits | Core index fund | Core index fund |
| Issuer | iShares | Vanguard |
| What it is | Expanded Tech Sector | Mega Cap Growth |
| Total return, 1 year | +32.7% | +14.9% |
| S&P 500 over the same days | +17.5% | +17.5% |
| Gap to the S&P 500 | +15.2 pts | −2.6 pts |
| Expense ratio | 0.37% | 0.07% |
| Already in the S&P 500 | 92.0% | 99.2% |
| Holdings | 295 | 56 |
IGM in plain words
IGM is an index equity fund tracking the Expanded Tech Sector. Over the year to Sep 11, 2026 it returned +32.7% 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 Jun 30, 2026, 92% of the fund by weight is stocks the S&P 500 also holds, across 295 positions, with the top ten at 55.7%. It sat 5.1% below its high of Jun 2, 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, IGM or MGK?
- In the year to Sep 12, 2026, with distributions reinvested, IGM returned +32.7% and MGK returned +14.9%, so IGM returned more. One year is one year; the longer windows are in the table.
- Which is cheaper, IGM or MGK?
- IGM charges 0.37% a year and MGK charges 0.07%, so MGK is cheaper. Fees come from each fund's prospectus.
- How much do IGM and MGK overlap with the S&P 500?
- By their latest filed holdings, 92% of IGM and 99% of MGK by weight is stocks the S&P 500 already holds. Between the two funds, 62% 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, IGM against MGK, data as of Sep 12, 2026. https://etfiq.com/compare/any/IGM-MGK Free to use with attribution; the underlying files are at Open data.
A comparison is not a recommendation. Standards and sources