MGK vs VOO: Holdings Overlap
MGKVanguard Mega Cap Growth Index Fund
Vanguard · 59 holdings · $33.7B · as of 2026-03-31
Vanguard · 504 holdings · $1.03T · as of 2026-03-31
How similar are MGK and VOO?
Vanguard Mega Cap Growth Index Fund (MGK, by Vanguard) holds 59 positions; Vanguard 500 Index Fund (VOO, by Vanguard) holds 504. They have 57 holdings in common, and by portfolio weight the two funds are 48.5% identical. In practical terms the pair is moderately overlapping; they share a meaningful core, but each fund adds distinct exposure.
- Overlap by Weight
- 48.5%Sum of the smaller weight of each shared holding
- Shared Holdings
- 57MGK holds 59 · VOO holds 504
- Weight in Shared Holdings
- MGK 99%·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 MGK
2 of 59 positions (0.7% of the fund) are not held by VOO.
Sector Breakdown
| Sector | MGK | VOO |
|---|---|---|
| Information Technology | 54.4% | 32.7% |
| Communication Services | 16.7% | 10.5% |
| Consumer Discretionary | 13.1% | 9.9% |
| Financials | 4.9% | 12.4% |
| Health Care | 5.2% | 9.5% |
| Other Sectors | 5.6% | 24.9% |
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 |
|---|---|---|---|---|---|---|---|
| MGK | +3.8% | +10.2% | +19.4% | +24.7% | +14.0% | +18.8% | 0.32% |
| 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 MGK vs VOO →
Shared Holdings(57)
The top 10 shared positions account for 75% of the overlap, led by NVDA, AAPL and MSFT.
 NVDANVIDIA Corp. COM | 13.75% | 7.58% | 7.58% |
|---|---|---|---|
 AAPLApple Inc. COM | 12.60% | 6.66% | 6.66% |
 MSFTMicrosoft Corp. COM | 9.01% | 4.91% | 4.91% |
 AMZNAmazon.com, Inc. COM | 4.59% | 3.64% | 3.64% |
 GOOGLAlphabet Inc. CAP STK CL A | 5.51% | 2.99% | 2.99% |
 AVGOBroadcom Inc COM | 4.40% | 2.62% | 2.62% |
 GOOGAlphabet Inc. CAP STK CL C | 4.37% | 2.40% | 2.40% |
 METAMeta Platforms, Inc., Class A | 4.17% | 2.24% | 2.24% |
 TSLATesla Inc COM | 4.18% | 1.87% | 1.87% |
 LLYEli Lilly & Co. COM | 3.17% | 1.30% | 1.30% |
 VVisa, Inc., Class A | 1.97% | 0.89% | 0.89% |
 MAMasterCard Incorporated CL A | 1.72% | 0.73% | 0.73% |
 NFLXNetflix, Inc. COM | 1.76% | 0.73% | 0.73% |
 PLTRPalantir Technologies, Inc., Class A | 1.42% | 0.60% | 0.60% |
 AMDAdvanced Micro Devices Inc. COM | 1.49% | 0.59% | 0.59% |
 LRCXLam Research Corporation COM NEW | 1.25% | 0.48% | 0.48% |
 ORCLOracle Corp. COM | 1.18% | 0.45% | 0.45% |
 GEVGE Vernova Inc. COM | 1.14% | 0.42% | 0.42% |
 MCDMcDonald's Corp. COM | 0.63% | 0.40% | 0.40% |
 KLACKLA Corp. COM NEW | 0.98% | 0.35% | 0.35% |
 TJXThe TJX Companies Inc. COM | 0.90% | 0.32% | 0.32% |
 CRMSalesforce Inc. COM | 0.51% | 0.31% | 0.31% |
 ISRGIntuitive Surgical Inc. COM NEW | 0.83% | 0.29% | 0.29% |
 BABoeing Co. (The) | 0.78% | 0.28% | 0.28% |
 APHAmphenol Corporation CL A | 0.80% | 0.28% | 0.28% |
Frequently Asked Questions
How much do MGK and VOO overlap?
MGK and VOO overlap by 48.5% of portfolio weight. They share 57 holdings (MGK holds 59 positions and VOO holds 504), based on each fund's latest SEC-reported holdings.
Is it redundant to own both MGK and VOO?
The two portfolios are 48.5% 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 MGK and VOO?
The largest positions held by both funds are NVDA, AAPL, MSFT, AMZN and GOOGL. Together the top 10 shared positions account for 75% of the total overlap.
What does MGK own that VOO doesn't?
2 positions (0.7% of MGK) are unique to MGK, led by MRVL and SNOW. In the other direction, 447 positions (51.3% of VOO) are unique to VOO.