ETF comparison
MGC vs SPY
Both US Large Cap.
Vanguard Morningstar Mega Cap ETF · State Street SPDR S&P 500 ETF Trust
Holdings overlap
169 positions appear in both funds. Buying equal dollars of MGC and SPY would leave roughly 82.6% of each dollar exposed to the same underlying securities.
Unmatched is the part of a fund's weight the other fund doesn't match: names only it holds, plus any extra weight it puts in names both funds hold.
Side by side
Sub-score comparison
Tracking quality isn't part of the composite — see what we don't score for why.
Cost difference
MGC is 4 bps cheaper than SPY. On a $100,000 position that's about $44/yr more in fees for SPY.
Fee figure is the annual expense charged on $100,000. To see how the gap compounds over a multi-decade holding period, open the cost calculator pre-filled with MGC vs SPY.
Top shared holdings
169 shared in total| # | Holding | In MGC | In SPY | Overlap |
|---|---|---|---|---|
| 1 | Apple Inc | 8.56% | 7.69% | 7.69% |
| 2 | NVIDIA Corp | 9.34% | 7.30% | 7.30% |
| 3 | Microsoft Corp | 6.93% | 6.22% | 6.22% |
| 4 | Amazon.com Inc | 4.63% | 3.94% | 3.94% |
| 5 | Alphabet Inc | 3.67% | 2.56% | 2.56% |
| 6 | Broadcom Inc | 3.23% | 2.33% | 2.33% |
| 7 | Meta Platforms Inc | 2.31% | 2.09% | 2.09% |
| 8 | Alphabet Inc | 2.88% | 2.06% | 2.06% |
| 9 | Eli Lilly & Co | 1.80% | 1.71% | 1.71% |
| 10 | Tesla Inc | 1.91% | 1.64% | 1.64% |
| 11 | Berkshire Hathaway Inc | 1.61% | 1.63% | 1.61% |
| 12 | JPMorgan Chase & Co | 1.76% | 1.41% | 1.41% |
Only in MGC
3 total- Space Exploration Technologies Corp 0.16%
- Berkshire Hathaway Inc 0.11%
- Snowflake Inc 0.10%
Only in SPY
335 total- MARATHON PETROLEUM CORP 0.17%
- VALERO ENERGY CORP 0.16%
- PHILLIPS 66 0.16%
- MODERNA INC 0.14%
- QUANTA SERVICES INC 0.13%
- HOWMET AEROSPACE INC 0.13%
- ROYAL CARIBBEAN CRUISES LTD 0.12%
- MOTOROLA SOLUTIONS INC 0.12%
- CONSTELLATION ENERGY 0.12%
- GENERAL MOTORS CO 0.12%
Related comparisons
More comparisons with MGC
- MGC vs VV · Vanguard Morningstar Large-Cap ETF 81.2%
- MGC vs SPYM · State Street SPDR Portfolio S&P 500 ETF 80.2%
- MGC vs IVV · iShares Core S&P 500 ETF 80.2%
- MGC vs VOO · Vanguard S&P 500 ETF 80.1%
- MGC vs SCHX · Schwab U.S. Large-Cap ETF 78.8%
- MGC vs VONE · Vanguard Russell 1000 Index Fund ETF Shares 76.8%
More comparisons with SPY
- SPY vs ESGV · Vanguard ESG U.S. Stock ETF 81.0%
- SPY vs IWV · iShares Russell 3000 ETF 80.5%
- SPY vs ITOT · iShares Core S&P Total U.S. Stock Market ETF 80.4%
- SPY vs ESGU · iShares ESG Aware MSCI USA ETF 77.7%
- SPY vs GSLC · Goldman Sachs ActiveBeta U.S. Large Cap Equity ETF 72.8%
- SPY vs OEF · iShares S&P 100 ETF 70.5%
Percentages are holdings overlap with the named fund.
Open MGC or SPY at a brokerage
Both funds trade commission-free at major US brokerages.
Affiliate links — opening an account through these earns PlainIndex a one-time referral. Scoring is computed before any affiliate consideration; see our methodology and funding disclosure.
Holdings overlap is the sum of min(weight_a, weight_b) over positions
matched on ISIN (CUSIP fallback). Methodology: see
/methodology/.
Comparing two funds doesn't endorse swapping one for the other. Tax-lot history, account type, and personal goals matter — PlainIndex publishes data and methodology, not investment advice.