MGK vs VOOG: Holdings Overlap
MGKVanguard Mega Cap Growth Index Fund
Vanguard · 59 holdings · $33.7B · as of 2026-03-31
VOOGVanguard S&P 500 Growth Index Fund
Vanguard · 146 holdings · $27.2B · as of 2026-05-31
Holdings snapshots are 61 days apart (MGK: 2026-03-31, VOOG: 2026-05-31). 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 MGK and VOOG?
Vanguard Mega Cap Growth Index Fund (MGK, by Vanguard) holds 59 positions; Vanguard S&P 500 Growth Index Fund (VOOG, by Vanguard) holds 146. They have 48 holdings in common, and by portfolio weight the two funds are 71.6% identical. In practical terms the pair is heavily overlapping, with largely the same stocks driving both funds.
- Overlap by Weight
- 71.6%Sum of the smaller weight of each shared holding
- Shared Holdings
- 48MGK holds 59 · VOOG holds 146
- Weight in Shared Holdings
- MGK 95%·VOOG 76%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
11 of 59 positions (4.8% of the fund) are not held by VOOG.
Only in VOOG
98 of 146 positions (23.8% of the fund) are not held by MGK. Showing the top 30 by weight.
Sector Breakdown
| Sector | MGK | VOOG |
|---|---|---|
| Information Technology | 54.4% | 52.1% |
| Communication Services | 16.7% | 16.6% |
| Consumer Discretionary | 13.1% | 8.8% |
| Financials | 4.9% | 8.1% |
| Industrials | 3.0% | 6.1% |
| Other Sectors | 7.8% | 8.0% |
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% |
| VOOG | +4.5% | +15.6% | +25.4% | +26.8% | +14.1% | +17.8% | 0.44% |
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 VOOG →
Shared Holdings(48)
The top 10 shared positions account for 78% of the overlap, led by NVDA, MSFT and AAPL.
 NVDANVIDIA Corp. COM | 13.75% | 14.26% | 13.75% |
|---|---|---|---|
 MSFTMicrosoft Corp. COM | 9.01% | 9.29% | 9.01% |
 AAPLApple Inc. COM | 12.60% | 6.37% | 6.37% |
 GOOGLAlphabet Inc. CAP STK CL A | 5.51% | 6.16% | 5.51% |
 AVGOBroadcom Inc COM | 4.40% | 5.89% | 4.40% |
 GOOGAlphabet Inc. CAP STK CL C | 4.37% | 4.89% | 4.37% |
 AMZNAmazon.com, Inc. COM | 4.59% | 3.90% | 3.90% |
 METAMeta Platforms, Inc., Class A | 4.17% | 3.85% | 3.85% |
 LLYEli Lilly & Co. COM | 3.17% | 2.43% | 2.43% |
 TSLATesla Inc COM | 4.18% | 2.11% | 2.11% |
 AMDAdvanced Micro Devices Inc. COM | 1.49% | 2.34% | 1.49% |
 LRCXLam Research Corporation COM NEW | 1.25% | 1.10% | 1.10% |
 NFLXNetflix, Inc. COM | 1.76% | 1.01% | 1.01% |
 PLTRPalantir Technologies, Inc., Class A | 1.42% | 0.99% | 0.99% |
 VVisa, Inc., Class A | 1.97% | 0.84% | 0.84% |
 MAMasterCard Incorporated CL A | 1.72% | 0.75% | 0.75% |
 GEVGE Vernova Inc. COM | 1.14% | 0.73% | 0.73% |
 KLACKLA Corp. COM NEW | 0.98% | 0.70% | 0.70% |
 SNDKSandisk Corporation COM | 0.62% | 0.70% | 0.62% |
 ORCLOracle Corp. COM | 1.18% | 0.55% | 0.55% |
 CRWDCrowdstrike Holdings, Inc., Class A | 0.56% | 0.51% | 0.51% |
 APHAmphenol Corporation CL A | 0.80% | 0.51% | 0.51% |
 APPAppLovin Corp., Class A | 0.55% | 0.46% | 0.46% |
 ANETArista Networks Inc COM SHS | 0.70% | 0.46% | 0.46% |
 ISRGIntuitive Surgical Inc. COM NEW | 0.83% | 0.42% | 0.42% |
Frequently Asked Questions
How much do MGK and VOOG overlap?
MGK and VOOG overlap by 71.6% of portfolio weight. They share 48 holdings (MGK holds 59 positions and VOOG holds 146), based on each fund's latest SEC-reported holdings.
Is it redundant to own both MGK and VOOG?
The two portfolios are 71.6% 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 MGK and VOOG?
The largest positions held by both funds are NVDA, MSFT, AAPL, GOOGL and AVGO. Together the top 10 shared positions account for 78% of the total overlap.
What does MGK own that VOOG doesn't?
11 positions (4.8% of MGK) are unique to MGK, led by VRTX, EQIX and CRM. In the other direction, 98 positions (23.8% of VOOG) are unique to VOOG.