What Top-Ten Overlap Between Passive Giants Really Tells You
When passive giants share most of their top ten, the overlap is not a boring coincidence. It is a market-structure signal that helps define the baseline every active portfolio should be judged against.
Top-ten overlap between passive giants is one of the fastest ways to see what the market's default portfolio looks like.
When Vanguard, BlackRock, and State Street all carry the same names near the top, that does not tell you those names are unique ideas. It tells you the benchmark has become concentrated there.
Why It Matters
Overlap helps you separate structural ownership from differentiated conviction. A stock that sits in every passive giant is less useful as an ownership-based edge and more useful as context for crowding and benchmark risk.
How to Use It
- Identify the shared top ten.
- Treat that group as the passive baseline.
- Compare other managers against that baseline instead of against zero.
Real Example
In Q4 2025, NVDA, AAPL, MSFT, AMZN, and Alphabet formed the common spine across the passive giants. That made the trio's overlap map more informative than any one filing in isolation.
FAQ
Does overlap mean the stock is crowded?
Often yes, but it is specifically passive or benchmark-heavy crowding, not necessarily active-manager consensus.
What should I read next?
See the cross-fund overlap map and our guides on index-manager filings and comparing passive giants.
Related Research
Explore all researchThree giant 13F filings point to the same conclusion: market leadership is so concentrated that the overlap between passive giants has become the baseline every active manager must be measured against.
Mar 19, 2026
Wellington Management closed Q4 2025 with $570.66B across 7,580 positions. Unlike peers chasing NVIDIA, Wellington's top holding is just 4.9% of portfolio — true diversification at scale.
Mar 17, 2026
State Street's latest 13F mirrors the passive giants where it should, but the new-position list and rapid jumps in Netflix and ServiceNow still offer useful clues about where benchmark pressure was strongest.
Mar 19, 2026
FMR's latest 13F is still huge, but unlike the passive giants it shows sharper concentration, a 51-position reset, and a top holding in NVIDIA worth more than 10% of the disclosed book.
Mar 19, 2026
BlackRock's latest 13F shows massive increases in Netflix and ServiceNow, but the filing reads less like a stock-picking manifesto and more like a map of benchmark gravity at enormous scale.
Mar 19, 2026