ETF Overlap Checker
HomeETFsMethodologyBlogCompany

ETF Overlap Checker

Compare ETF holdings and spot redundancy in your portfolio.

ETF directoryMethodologyBlog

Also from CG Corp

Portwise — Portfolio risk researchEarningBird — AI earnings analysisWorldPulse — Global intelligenceTravelGuides — City guide journal

Connect

cgcorp.ioX (@carraway_gatsby)YouTube

Data is for informational purposes only. Not financial advice.

Privacy PolicyTerms of Service© 2026 Carraway & Gatsby Corporation

MGK vs SPLG Overlap

MGK is a U.S. growth equity ETF from Vanguard, while SPLG is a U.S. large-cap core ETF from SPDR. MGK and SPLG show heavy overlap, with an estimated weighted overlap of 53.24%. They share 56 holdings in the loaded dataset, led by NVDA, MSFT, and AAPL.

53.2% overlap
#
56Shared Holdings
OK
High Overlap

Served from cache.

Quick Answer

MGK is a U.S. growth equity ETF from Vanguard, while SPLG is a U.S. large-cap core ETF from SPDR. MGK and SPLG show heavy overlap, with an estimated weighted overlap of 53.24%. They share 56 holdings in the loaded dataset, led by NVDA, MSFT, and AAPL.

  • 53.24% weighted overlap across 56 shared holdings.
  • The top three shared holdings explain 41.74% of the measured overlap.
  • SPLG is the broader fund, while MGK is more targeted.
  • The overlap is mostly explained by the top shared positions rather than sector labels alone.
  • Holding both may add less diversification than the fund names imply.

Data Freshness

MGK holdings
Aug 13, 2026
SPLG holdings
Aug 13, 2026
Overlap computed
Aug 13, 2026
Data source
Financial Modeling Prep

Review the methodology for the overlap formula and refresh policy.

Compare another pair

vs

Advertisement

About These ETFs

ETF A

MGK

Vanguard Morningstar Mega Cap Growth ETF

Issuer
Vanguard
Asset class
Large Cap Equity
Expense ratio
0.05%
AUM
$33B
Inception
Dec 17, 2007

ETF B

SPLG

SPDR Portfolio S&P 500 ETF

Issuer
SPDR
Asset class
Equity
Expense ratio
0.02%
AUM
$96B
Inception
Nov 7, 2005

What Stands Out In This Comparison

01

What This Means

MGK is a U.S. growth equity ETF from Vanguard, while SPLG is a U.S. large-cap core ETF from SPDR. MGK and SPLG share a large chunk of the same portfolio weight. The overlap is driven by positions like NVDA, MSFT, and AAPL, so owning both may not diversify your stock exposure as much as the fund names suggest.

02

How They Differ

MGK is a U.S. growth equity ETF from Vanguard, while SPLG is a U.S. large-cap core ETF from SPDR. SPLG is the broader fund, while MGK is the more targeted sleeve. SPLG has the lower expense ratio, while MGK charges more for its exposure.

03

What Drives The Overlap

The overlap is driven by a relatively small set of large shared positions. The top three shared holdings account for 41.74% of the score, which means the result is heavily influenced by the biggest common weights rather than a long tail of tiny positions.

04

When One May Fit Better

If you want the broader portfolio building block, SPLG is usually the wider choice. If you want the more focused tilt, MGK is the narrower expression. SPLG has the lower expense ratio, while MGK charges more for its exposure.

Overlap Driver Snapshot

Concentration

The top three shared holdings explain 41.74% of the full overlap score.

That helps show whether the score comes from a handful of giant shared positions or from a broader mix of common holdings.

Shared Sector Tilt

Sector tags are not consistently available for the biggest shared positions in this dataset, so this comparison leans more on the specific holdings than on sector labels.

Top Shared Holdings

These are the holdings contributing the most to the overlap score between MGK and SPLG.

HoldingNameMGK Wt.SPLG Wt.Overlap
NVDANVIDIA Corp13.75%8.58%8.58%
MSFTMicrosoft Corp9.01%6.84%6.84%
AAPLApple Inc12.60%6.80%6.80%
AMZNAmazon.com Inc4.59%3.80%3.80%
AVGOBroadcom Inc4.40%3.08%3.08%
METAMeta Platforms Inc4.17%2.77%2.77%
GOOGLAlphabet Inc5.51%2.71%2.71%
TSLATesla Inc4.18%2.20%2.20%
GOOGAlphabet Inc4.37%2.18%2.18%
LLYEli Lilly & Co3.17%1.10%1.10%

Why These ETFs Overlap

MGK is a U.S. growth equity ETF from Vanguard, while SPLG is a U.S. large-cap core ETF from SPDR. The overlap exists because both funds allocate meaningful weight to the same holdings. In this dataset, the biggest shared drivers are NVDA, MSFT, and AAPL, which appear in both portfolios and push the overlap score higher.

Holding both MGK and SPLG may add less diversification than you expect. Many investors would choose the ETF that best matches their goal and avoid paying for duplicate exposure.

Related Comparisons

AGG vs MGK->AGG vs SPLG->BND vs MGK->BND vs SPLG->

Frequently Asked Questions About MGK and SPLG

What is the overlap between MGK and SPLG?+
MGK and SPLG currently show an estimated weighted overlap of 53.24% based on the loaded holdings data.
How many holdings do MGK and SPLG share?+
They share 56 holdings in the current dataset.
Is the MGK and SPLG overlap high?+
The current verdict is High Overlap. That means the two ETFs have substantial duplication in portfolio weight.
Why do MGK and SPLG overlap?+
MGK and SPLG overlap because the same large positions appear in both funds. In this comparison, the top three shared holdings explain 41.74% of the measured overlap score.
Which ETF is broader, MGK or SPLG?+
SPLG is the broader fund, while MGK is the more targeted sleeve. That does not automatically make one better, but it helps explain why the pair can overlap while still serving different roles.

Go deeper

ETF overlap is just the start

Portwise gives you full portfolio diagnostics — concentration risk, hidden risk scoring, drawdown analysis, and risk evolution tracking. Free to start.

Try Portwise free →

Stay informed

Get ETF insights delivered to your inbox

Portfolio overlap alerts, new comparison data, and investing insights from the CG Corp team. No spam, unsubscribe anytime.

How Overlap Is Calculated

A straightforward approach used by portfolio analysts.

Overlap = sum(min(Weight_A, Weight_B)) for each shared holding

For every stock that appears in both ETFs, we take the smaller of the two weights. Adding up all those minimums gives the total overlap percentage. A score of 100% means the two ETFs hold the exact same stocks in the same proportions.

Want the full explanation? Read the methodology page.

Looking for another pair? Start from the homepage or open the canonical URL for this comparison at /compare/MGK-SPLG.