USMC vs VOO: Holdings Overlap
USMCPrincipal U.S. Mega-Cap ETF
Principal · 26 holdings · $3.6B · as of 2026-03-31
Vanguard · 504 holdings · $1.03T · as of 2026-03-31
How similar are USMC and VOO?
Principal U.S. Mega-Cap ETF (USMC, by Principal) holds 26 positions; Vanguard 500 Index Fund (VOO, by Vanguard) holds 504. They have 26 holdings in common, and by portfolio weight the two funds are 48.0% identical. In practical terms the pair is moderately overlapping; they share a meaningful core, but each fund adds distinct exposure.
- Overlap by Weight
- 48.0%Sum of the smaller weight of each shared holding
- Shared Holdings
- 26USMC holds 26 · VOO holds 504
- Weight in Shared Holdings
- USMC 100%·VOO 48%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 USMC
Every position in USMC is also held by VOO, so it brings nothing the other fund doesn’t already own.
Only in VOO
478 of 504 positions (51.7% of the fund) are not held by USMC. Showing the top 30 by weight.
Sector Breakdown
| Sector | USMC | VOO |
|---|---|---|
| Information Technology | 26.6% | 32.7% |
| Financials | 20.4% | 12.4% |
| Communication Services | 14.1% | 10.5% |
| Consumer Staples | 10.2% | 5.2% |
| Consumer Discretionary | 8.2% | 9.9% |
| Other Sectors | 20.2% | 29.1% |
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 |
|---|---|---|---|---|---|---|---|
| USMC | +2.9% | +11.9% | +21.9% | +20.8% | +14.5% | — | 0.74% |
| VOO | +3.4% | +14.0% | +23.7% | +21.3% | +13.4% | +15.4% | 1.03% |
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 USMC vs VOO →
Shared Holdings(26)
The top 10 shared positions account for 74% of the overlap, led by NVDA, AAPL and MSFT.
 NVDANVIDIA Corp. COM | 7.57% | 7.58% | 7.57% |
|---|---|---|---|
 AAPLApple Inc. COM | 6.70% | 6.66% | 6.66% |
 MSFTMicrosoft Corp. COM | 4.91% | 4.91% | 4.91% |
 AMZNAmazon.com, Inc. COM | 3.62% | 3.64% | 3.62% |
 GOOGLAlphabet Inc. CAP STK CL A | 5.37% | 2.99% | 2.99% |
 AVGOBroadcom Inc COM | 4.50% | 2.62% | 2.62% |
 METAMeta Platforms, Inc., Class A | 4.11% | 2.24% | 2.24% |
 TSLATesla Inc COM | 2.36% | 1.87% | 1.87% |
 BRK-BBerkshire Hathaway, Inc., Class B | 3.42% | 1.57% | 1.57% |
 JPMJPMorgan Chase & Co. COM | 4.56% | 1.34% | 1.34% |
 LLYEli Lilly & Co. COM | 2.23% | 1.30% | 1.30% |
 XOMExxon Mobil Corp. COM | 2.84% | 1.27% | 1.27% |
 JNJJohnson & Johnson COM | 3.54% | 1.05% | 1.05% |
 WMTWalmart Inc COM | 2.48% | 0.97% | 0.97% |
 VVisa, Inc., Class A | 4.39% | 0.89% | 0.89% |
 COSTCostco Wholesale Corporation COM | 4.58% | 0.79% | 0.79% |
 MAMasterCard Incorporated CL A | 4.49% | 0.73% | 0.73% |
 NFLXNetflix, Inc. COM | 4.65% | 0.73% | 0.73% |
 CVXChevron Corp. COM | 2.83% | 0.69% | 0.69% |
 ABBVAbbVie Inc. COM | 3.37% | 0.69% | 0.69% |
 MUMicron Technology Inc. COM | 2.95% | 0.68% | 0.68% |
 PGThe Procter & Gamble Co. COM | 3.11% | 0.60% | 0.60% |
 CATCaterpillar Inc COM | 2.43% | 0.59% | 0.59% |
 HDHome Depot, Inc. (The) | 2.20% | 0.59% | 0.59% |
 BACBank of America Corp. COM | 3.52% | 0.56% | 0.56% |
Frequently Asked Questions
How much do USMC and VOO overlap?
USMC and VOO overlap by 48.0% of portfolio weight. They share 26 holdings (USMC holds 26 positions and VOO holds 504), based on each fund's latest SEC-reported holdings.
Is it redundant to own both USMC and VOO?
The two portfolios are 48.0% identical by weight. Owning both is defensible: they share a meaningful core, but each fund adds exposure the other lacks.
What are the biggest shared holdings of USMC and VOO?
The largest positions held by both funds are NVDA, AAPL, MSFT, AMZN and GOOGL. Together the top 10 shared positions account for 74% of the total overlap.
What does USMC own that VOO doesn't?
Nothing. Every position in USMC is also held by VOO. In the other direction, 478 positions (51.7% of VOO) are unique to VOO.