ETF comparison

MGC vs VOO

Both US Large Cap.

Vanguard Mega Cap Index Fund · Vanguard S&P 500 ETF

Holdings overlap

Weighted by ISIN/CUSIP
81.8 %

171 positions appear in both funds. Buying equal dollars of MGC and VOO would leave roughly 81.8% of each dollar exposed to the same underlying securities.

MGC only 17.9% Shared 81.8% VOO only 18.0%
In MGC only
4 positions
Shared
171 positions
In VOO only
332 positions

Side by side

MGC

Vanguard Mega Cap Index Fund

Vanguard · US Large Cap

88 composite / 100
Expense ratio
0.050%
Net assets
$10.57B
TTM yield
0.91%
Top-10 conc.
44.1%
VOO

Vanguard S&P 500 ETF

Vanguard · US Large Cap

91 composite / 100
Expense ratio
0.030%
Net assets
$1.67T
TTM yield
1.06%
Top-10 conc.
36.5%

Sub-score comparison

95
Cost
97
89
Tax efficiency
88
100
Liquidity
100
51
Concentration
62
Tracking quality
MGC sub-score VOO

Tracking quality isn't part of the composite — see what we don't score for why.

Cost difference

VOO is 2 bps cheaper than MGC. On a $100,000 position that's about $20/yr more in fees for MGC.

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 VOO.

Top shared holdings

171 shared in total
# Holding In MGC In VOO Overlap
1 NVIDIA Corp 8.54% 7.58% 7.58%
2 Apple Inc 8.15% 6.66% 6.66%
3 Microsoft Corp 6.10% 4.91% 4.91%
4 Amazon.com Inc 4.22% 3.64% 3.64%
5 Alphabet Inc 3.79% 2.99% 2.99%
6 Broadcom Inc 3.15% 2.62% 2.62%
7 Alphabet Inc 2.99% 2.40% 2.40%
8 Meta Platforms Inc 2.95% 2.24% 2.24%
9 Tesla Inc 2.38% 1.87% 1.87%
10 Berkshire Hathaway Inc 1.83% 1.57% 1.57%
11 JPMorgan Chase & Co 1.60% 1.34% 1.34%
12 Eli Lilly & Co 1.87% 1.30% 1.30%

Only in MGC

4 total
  • Berkshire Hathaway Inc 0.12%
  • Marvell Technology Inc 0.07%
  • Snowflake Inc 0.06%
  • Strategy Inc 0.04%

Only in VOO

332 total
  • Newmont Corp 0.21%
  • Corning Inc 0.19%
  • Vertiv Holdings Co 0.17%
  • Sandisk Corp/DE 0.17%
  • Howmet Aerospace Inc 0.17%
  • Western Digital Corp 0.16%
  • Constellation Energy Corp 0.16%
  • Seagate Technology Holdings PLC 0.15%
  • Quanta Services Inc 0.15%
  • SLB Ltd 0.14%

Open MGC or VOO 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.