MGC vs BBUS: Holdings Overlap
MGCVanguard Mega Cap Index Fund
Vanguard · 173 holdings · $10.3B · as of 2026-05-31
BBUSJpmorgan Betabuilders U.S. Equity ETF
JPMorgan · 494 holdings · $8.9B · as of 2026-04-30
Holdings snapshots are 31 days apart (MGC: 2026-05-31, BBUS: 2026-04-30). Weights and index membership change between snapshots, so the true current overlap is typically higher than shown. For funds tracking the same index, the gap can be 5–15 points.
How similar are MGC and BBUS?
Vanguard Mega Cap Index Fund (MGC, by Vanguard) holds 173 positions; Jpmorgan Betabuilders U.S. Equity ETF (BBUS, by JPMorgan) holds 494. They have 171 holdings in common, and by portfolio weight the two funds are 81.9% identical. In practical terms the pair is heavily overlapping, with largely the same stocks driving both funds.
- Overlap by Weight
- 81.9%Sum of the smaller weight of each shared holding
- Shared Holdings
- 171MGC holds 173 · BBUS holds 494
- Weight in Shared Holdings
- MGC 99%·BBUS 83%Share of each fund's weight in stocks both funds own
Based on each fund's latest official holdings. How is this calculated?
What makes each fund different
Only in MGC
2 of 173 positions (0.6% of the fund) are not held by BBUS.
Only in BBUS
323 of 494 positions (16.7% of the fund) are not held by MGC. Showing the top 30 by weight.
Sector Breakdown
| Sector | MGC | BBUS |
|---|---|---|
| Information Technology | 42.4% | 34.4% |
| Communication Services | 12.2% | 11.4% |
| Financials | 10.7% | 12.0% |
| Consumer Discretionary | 9.7% | 10.0% |
| Industrials | 6.4% | 8.9% |
| Other Sectors | 18.1% | 22.7% |
Share of each fund's portfolio weight by GICS-style sector, compiled from issuer fund data and our own classification of the holdings, not the issuers' published sector charts.
Performance
| Fund | 1M | YTD | 1Y | 3Y (ann.) | 5Y (ann.) | 10Y (ann.) | Yield |
|---|---|---|---|---|---|---|---|
| MGC | +3.6% | +13.6% | +24.3% | +22.7% | +14.0% | +16.2% | 0.89% |
| BBUS | +3.5% | +13.7% | +23.1% | +21.3% | +12.9% | — | 0.98% |
Total returns including dividends, from adjusted daily closes as of 2026-08-07. 3Y/5Y/10Y are annualized. Yield is trailing-12-month distributions over the last close. Past performance does not predict future results.
Project the growth of $10,000 in MGC vs BBUS →
Shared Holdings(171)
The top 10 shared positions account for 47% of the overlap, led by NVDA, AAPL and MSFT.
 NVDANVIDIA Corp. COM | 9.10% | 7.53% | 7.53% |
|---|---|---|---|
 AAPLApple Inc. COM | 8.55% | 6.41% | 6.41% |
 MSFTMicrosoft Corp. COM | 6.24% | 4.88% | 4.88% |
 AMZNAmazon.com, Inc. COM | 4.88% | 4.19% | 4.19% |
 GOOGLAlphabet Inc. CAP STK CL A | 4.13% | 3.61% | 3.61% |
 AVGOBroadcom Inc COM | 3.95% | 3.13% | 3.13% |
 GOOGAlphabet Inc. CAP STK CL C | 3.25% | 3.11% | 3.11% |
 METAMeta Platforms, Inc., Class A | 2.58% | 2.16% | 2.16% |
 TSLATesla Inc COM | 2.29% | 1.73% | 1.73% |
 BRK-BBerkshire Hathaway, Inc., Class B | 1.53% | 1.40% | 1.40% |
 JPMJPMorgan Chase & Co. COM | 1.41% | 1.36% | 1.36% |
 LLYEli Lilly & Co. COM | 1.75% | 1.20% | 1.20% |
 XOMExxon Mobil Corp. COM | 1.13% | 1.03% | 1.03% |
 MUMicron Technology Inc. COM | 2.04% | 0.94% | 0.94% |
 AMDAdvanced Micro Devices Inc. COM | 1.57% | 0.93% | 0.93% |
 WMTWalmart Inc COM | 0.95% | 0.91% | 0.91% |
 VVisa, Inc., Class A | 1.02% | 0.89% | 0.89% |
 JNJJohnson & Johnson COM | 1.01% | 0.89% | 0.89% |
 COSTCostco Wholesale Corporation COM | 0.79% | 0.73% | 0.73% |
 CATCaterpillar Inc COM | 0.76% | 0.67% | 0.67% |
 INTCIntel Corporation COM | 0.86% | 0.66% | 0.66% |
 MAMasterCard Incorporated CL A | 0.73% | 0.66% | 0.66% |
 NFLXNetflix, Inc. COM | 0.68% | 0.64% | 0.64% |
 ABBVAbbVie Inc. COM | 0.72% | 0.60% | 0.60% |
 CSCOCisco Systems, Inc. COM | 0.80% | 0.58% | 0.58% |
Frequently Asked Questions
How much do MGC and BBUS overlap?
MGC and BBUS overlap by 81.9% of portfolio weight. They share 171 holdings (MGC holds 173 positions and BBUS holds 494), based on each fund's latest SEC-reported holdings.
Is it redundant to own both MGC and BBUS?
The two portfolios are 81.9% identical by weight. Owning both mostly doubles down on the shared core rather than diversifying: the same large positions drive both funds.
What are the biggest shared holdings of MGC and BBUS?
The largest positions held by both funds are NVDA, AAPL, MSFT, AMZN and GOOGL. Together the top 10 shared positions account for 47% of the total overlap.
What does MGC own that BBUS doesn't?
2 positions (0.6% of MGC) are unique to MGC, led by SNDK and BRK-A. In the other direction, 323 positions (16.7% of BBUS) are unique to BBUS.