MGK vs SPYG: Holdings Overlap
MGKVanguard Mega Cap Growth Index Fund
Vanguard · 59 holdings · $33.7B · as of 2026-03-31
SPYGState Street® SPDR® Portfolio S&P 500® Growth ETF
State Street (SPDR) · 147 holdings · $54.7B · as of 2026-08-06
Holdings snapshots are 128 days apart (MGK: 2026-03-31, SPYG: 2026-08-06). 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 SPYG?
Vanguard Mega Cap Growth Index Fund (MGK, by Vanguard) holds 59 positions; State Street® SPDR® Portfolio S&P 500® Growth ETF (SPYG, by State Street (SPDR)) holds 147. They have 49 holdings in common, and by portfolio weight the two funds are 70.8% identical. In practical terms the pair is heavily overlapping, with largely the same stocks driving both funds.
- Overlap by Weight
- 70.8%Sum of the smaller weight of each shared holding
- Shared Holdings
- 49MGK holds 59 · SPYG holds 147
- Weight in Shared Holdings
- MGK 95%·SPYG 75%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
10 of 59 positions (4.4% of the fund) are not held by SPYG.
Only in SPYG
98 of 147 positions (24.8% of the fund) are not held by MGK. Showing the top 30 by weight.
Sector Breakdown
| Sector | MGK | SPYG |
|---|---|---|
| Information Technology | 54.4% | 52.5% |
| Communication Services | 16.7% | 15.3% |
| Consumer Discretionary | 13.1% | 8.4% |
| Financials | 4.9% | 9.0% |
| Industrials | 3.0% | 6.4% |
| Other Sectors | 7.8% | 8.4% |
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% |
| SPYG | +4.4% | +15.6% | +25.4% | +26.9% | +14.2% | +17.9% | 0.47% |
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 SPYG →
Shared Holdings(49)
The top 10 shared positions account for 78% of the overlap, led by NVDA, MSFT and AAPL.
 NVDANVIDIA Corp. COM | 13.75% | 14.58% | 13.75% |
|---|---|---|---|
 MSFTMicrosoft Corp. COM | 9.01% | 10.20% | 9.01% |
 AAPLApple Inc. COM | 12.60% | 6.30% | 6.30% |
 GOOGLAlphabet Inc. CAP STK CL A | 5.51% | 5.76% | 5.51% |
 AVGOBroadcom Inc COM | 4.40% | 5.47% | 4.40% |
 GOOGAlphabet Inc. CAP STK CL C | 4.37% | 4.63% | 4.37% |
 AMZNAmazon.com, Inc. COM | 4.59% | 3.88% | 3.88% |
 METAMeta Platforms, Inc., Class A | 4.17% | 3.56% | 3.56% |
 LLYEli Lilly & Co. COM | 3.17% | 2.59% | 2.59% |
 TSLATesla Inc COM | 4.18% | 1.53% | 1.53% |
 AMDAdvanced Micro Devices Inc. COM | 1.49% | 2.19% | 1.49% |
 LRCXLam Research Corporation COM NEW | 1.25% | 1.05% | 1.05% |
 PLTRPalantir Technologies, Inc., Class A | 1.42% | 0.98% | 0.98% |
 VVisa, Inc., Class A | 1.97% | 0.93% | 0.93% |
 MAMasterCard Incorporated CL A | 1.72% | 0.86% | 0.86% |
 NFLXNetflix, Inc. COM | 1.76% | 0.85% | 0.85% |
 GEVGE Vernova Inc. COM | 1.14% | 0.74% | 0.74% |
 KLACKLA Corp. COM NEW | 0.98% | 0.69% | 0.69% |
 APHAmphenol Corporation CL A | 0.80% | 0.58% | 0.58% |
 CRWDCrowdstrike Holdings, Inc., Class A | 0.56% | 0.58% | 0.56% |
 ANETArista Networks Inc COM SHS | 0.70% | 0.55% | 0.55% |
 SNDKSandisk Corporation COM | 0.62% | 0.51% | 0.51% |
 WELLWelltower Inc. COM | 0.74% | 0.46% | 0.46% |
 PANWPalo Alto Networks Inc COM | 0.71% | 0.45% | 0.45% |
 BKNGBooking Holdings Inc COM | 0.71% | 0.44% | 0.44% |
Frequently Asked Questions
How much do MGK and SPYG overlap?
MGK and SPYG overlap by 70.8% of portfolio weight. They share 49 holdings (MGK holds 59 positions and SPYG holds 147), based on each fund's latest SEC-reported holdings.
Is it redundant to own both MGK and SPYG?
The two portfolios are 70.8% 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 SPYG?
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 SPYG doesn't?
10 positions (4.4% of MGK) are unique to MGK, led by VRTX, EQIX and CRM. In the other direction, 98 positions (24.8% of SPYG) are unique to SPYG.