Why Mega-Cap Overlap Does Not Mean Two Funds Are Clones
Many institutional portfolios share the same famous names. That does not make them copies. Weight, breadth, and supporting sleeves still matter.
When two funds both own NVIDIA, Microsoft, Apple, and Amazon, many readers jump to the wrong conclusion: these funds are clones. Usually they are not.
Overlap Is Only the Starting Point
The best companies in the market naturally appear in many institutional portfolios. That is normal. The more important question is how heavily those names are weighted and what else surrounds them.
Recent Examples
Our giant-filer breadth comparison shows that JPMorgan, Vanguard, and FMR all own the same leadership cluster, but the top-ten breadth and largest-position weights still differ materially.
How to Use This on 13F Insight
- List the overlapping names.
- Compare their weights, not just their presence.
- Compare top-five and top-ten concentration.
- Check the supporting sleeves beyond the obvious mega-caps.
Common Misconceptions
- Mistake: Same top holdings means same fund. Reality: The same names can sit inside very different structures.
- Mistake: Overlap means no information. Reality: Weight differences still reveal a lot.
- Mistake: Only unique names matter. Reality: Shared names can still convey very different conviction levels.
FAQ
What makes two funds true clones?
Not just shared names, but very similar weights, concentration, and supporting exposures.
Why do so many funds share the same mega-cap leaders?
Because those companies dominate indexes, market capitalization, and institutional ownership.
What should I compare first?
Largest-position weight and top-ten breadth.
Related Research
Explore all researchHSBC Holdings PLC held a staggering $175.9 trillion Q4 2025 13F, yet the top five still concentrated 25.2% in U.S. mega-cap leaders led by NVIDIA, Microsoft, and Apple.
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Norges Bank held a $934.8B Q4 2025 filing with a clean mega-cap hierarchy led by NVIDIA, Apple, Microsoft, Amazon, and Alphabet.
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BlackRock held the same mega-cap leadership cohort as other giant institutions in Q4 2025, but the top ten still totaled only 30.4% of the filing.
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State Street, Northern Trust, and Bank of New York Mellon all hold the same mega-cap leaders, but their top-ten concentration ranges from 27.7% to 31.4%.
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Bank of America combined familiar mega-cap leaders with VTV and VUG in Q4 2025, creating a visible value-growth ETF barbell inside a broad institutional book.
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