IUSG vs MGK: holdings overlap, shared companies and scores
As of September 11, 2026, IUSG and MGK overlap 71.4% by weight. iShares Core S&P U.S. Growth ETF (IUSG): S&P U.S. Growth index. Vanguard Morningstar Mega Cap Growth ETF (MGK): U.S. mega-cap growth stocks.
Updated September 11, 2026
How much do IUSG and MGK overlap?
As of September 11, 2026, IUSG and MGK overlap 71.4% by weight.
72% of IUSG is already inside MGK.
96% of MGK is already inside IUSG.
IUSG holds 397 companies and MGK holds 58; 47 are in both.
Computed by ETF Copilot from both funds' holdings rather than quoted from a data provider, and rebuilt nightly.
How does ETF Copilot score IUSG and MGK?
As of September 11, 2026, ETF Copilot scores IUSG 6.0 out of 10 and MGK 5.6 out of 10.
They differ most on Growth: IUSG 3.7 and MGK 2.3.
The five factor scores behind them are set out below, 0–10 and higher is better, ranked against every US equity ETF we track.
| Factor | IUSG | MGK |
|---|---|---|
| Growth | 3.7 | 2.3 |
| Valuation | 4.7 | 4.8 |
| Risk | 3.5 | 3.3 |
| Quality | 9.9 | 10.0 |
| Return | 8.3 | 8.3 |
IUSG is the cheaper of the two at 0.04% a year
As of September 11, 2026, IUSG charges 0.04% a year, yields 0.54% and holds $33.5B in assets across 397 positions.
As of September 11, 2026, MGK charges 0.05% a year, yields 0.35% and holds $32.4B in assets across 58 positions.
| Measure | IUSG | MGK |
|---|---|---|
| Expense ratio | 0.04% | 0.05% |
| Dividend yield | 0.54% | 0.35% |
| Assets under management | $33.5B | $32.4B |
| Holdings | 397 | 58 |
Expense ratio, dividend yield and assets under management are reported by the fund and refreshed daily. Every other figure on this page is computed by ETF Copilot.
Where IUSG and MGK trade against their own history
IUSG trades at 27.8 times earnings, against its own median of 25.8, and is more expensive than 68% of its own 114 monthly readings since 2017.
MGK trades at 31.0 times earnings, against its own median of 28.2, and is more expensive than 70% of its own 114 monthly readings since 2017.
What moved IUSG and MGK this week
IUSG fell 1.1% in the week to September 11, 2026. The holdings that moved it most were Nvidia (−4.4%), Microsoft (−2.8%) and Eli Lilly (−3.8%); Advanced Micro Devices (+13.1%) pushed the other way.
MGK fell 0.8% in the week to September 11, 2026. The holdings that moved it most were Nvidia (−4.4%), Microsoft (−2.8%) and Eli Lilly (−3.8%); Advanced Micro Devices (+13.1%) pushed the other way.
What do IUSG and MGK each hold?
What's inside IUSG: Tech 65%, Magnificent 7 49%.
57% of IUSG is its ten largest holdings.
What's inside MGK: Tech 74%, Magnificent 7 60%.
67% of MGK is its ten largest holdings.
Compare with similar funds
Cite this
ETF Copilot, “IUSG vs MGK holdings overlap and scores”, as of September 11, 2026.
https://etf-copilot.com/compare/iusg-vs-mgk
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