ETF comparison
IWB vs MGC
Both US Large Cap.
iShares Russell 1000 ETF · Vanguard Morningstar Mega Cap ETF
Holdings overlap
169 positions appear in both funds. Buying equal dollars of IWB and MGC would leave roughly 74.8% 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 10 bps cheaper than IWB. On a $100,000 position that's about $100/yr more in fees for IWB.
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 IWB vs MGC.
Top shared holdings
169 shared in total| # | Holding | In IWB | In MGC | Overlap |
|---|---|---|---|---|
| 1 | NVIDIA CORPORATION | 6.72% | 9.34% | 6.72% |
| 2 | APPLE INC. | 6.03% | 8.56% | 6.03% |
| 3 | MICROSOFT CORPORATION | 3.99% | 6.93% | 3.99% |
| 4 | AMAZON.COM, INC. | 3.33% | 4.63% | 3.33% |
| 5 | ALPHABET INC. | 3.00% | 3.67% | 3.00% |
| 6 | BROADCOM INC. | 2.53% | 3.23% | 2.53% |
| 7 | ALPHABET INC. | 2.42% | 2.88% | 2.42% |
| 8 | MICRON TECHNOLOGY, INC. | 1.87% | 1.99% | 1.87% |
| 9 | META PLATFORMS, INC. | 1.78% | 2.31% | 1.78% |
| 10 | TESLA, INC. | 1.77% | 1.91% | 1.77% |
| 11 | ELI LILLY AND COMPANY | 1.38% | 1.80% | 1.38% |
| 12 | ADVANCED MICRO DEVICES, INC. | 1.36% | 1.41% | 1.36% |
Only in IWB
855 total- EXXON MOBIL CORPORATION 0.82%
- VERTIV HOLDINGS CO 0.19%
- QUANTA SERVICES, INC. 0.15%
- HOWMET AEROSPACE INC. 0.15%
- CUMMINS INC. 0.14%
- DATADOG, INC. 0.12%
- BLOOM ENERGY CORPORATION 0.12%
- ROYAL CARIBBEAN CRUISES LTD. 0.11%
- CONSTELLATION ENERGY CORPORATION. 0.11%
- CLOUDFLARE, INC. 0.11%
Only in MGC
3 total- ExxonMobil Holdings Corp 1.23%
- Seagate Technology Holdings PLC 0.17%
- Berkshire Hathaway Inc 0.11%
Related comparisons
More comparisons with IWB
- IWB vs OEF · iShares S&P 100 ETF 66.1%
- IWB vs FELC · Fidelity Enhanced Large Cap Core ETF 63.5%
- IWB vs FNDX · Schwab Fundamental U.S. Large Company ETF 61.3%
- IWB vs IWD · iShares Russell 1000 Value ETF 59.2%
- IWB vs XLG · Invesco S&P 500 Top 50 ETF 57.2%
- IWB vs IWF · iShares Russell 1000 Growth ETF 56.9%
More comparisons with MGC
- MGC vs SCHB · Schwab U.S. Broad Market ETF 74.1%
- MGC vs VTI · Vanguard Morningstar Total Stock Market ETF 71.9%
- MGC vs ITOT · iShares Core S&P Total U.S. Stock Market ETF 71.8%
- MGC vs FELC · Fidelity Enhanced Large Cap Core ETF 67.5%
- MGC vs VUG · Vanguard Morningstar Growth ETF 63.6%
- MGC vs IWF · iShares Russell 1000 Growth ETF 57.7%
Percentages are holdings overlap with the named fund.
Open IWB or MGC 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.