MUB vs MBB overlap
MUB and MBB overlap 0.0% by weight, across 0 shared holdings.
Pick 2 to 4 ETFs.
Top shared holdings
These funds hold nothing in common.
Overlap by weight adds up the smaller weight of each holding the funds share, so 100% means identical portfolios. Long securities only: derivatives and cash vehicles are left out. Sources: MUB, SEC Form N-PORT, May 31, 2026; MBB, SEC Form N-PORT, May 31, 2026.
Largest institutions holding both
| Firm | MUB | MBB |
|---|---|---|
| Bank of America Corp. | $4.8B | $6.5B |
| Envestnet Asset Management Inc. | $1.9B | $2.9B |
| JPMorgan Chase & Co | $482.4M | $3.6B |
| LPL Financial LLC | $1.4B | $2.6B |
| UBS Group AG | $885.4M | $1.7B |
| FMR LLC | $2.5B | $34.6M |
| Betterment LLC | $2.3B | $5.7M |
| Morgan Stanley | $846.4M | $1.1B |
| Creative Planning | $1.6B | $9.1M |
| Ameriprise Financial Inc. | $196.2M | $1.3B |
| Fisher Asset Management, LLC | $1.4B | $78.6M |
| TIAA Wealth Investment Management LLC | $2.2M | $1.4B |
| Wells Fargo & Company | $1.1B | $275.3M |
| TIAA-CREF Individual & Institutional Services, LLC | $645.3M | $725.8M |
| Mercer Global Advisors Inc. | $1.1B | $5.5M |
This compares who owns the funds, not what the funds hold. From SEC Form 13F, for managers with $100M+ in US securities.
Who owns them: MUB institutional holders, MBB institutional holders.
Frequently asked questions
How much do MUB and MBB overlap?
0.0% by weight, with 0 holdings in common, using holdings for MUB as of May 31, 2026 and MBB as of May 31, 2026.
Do institutions hold both MUB and MBB?
665 Form 13F filers report positions in both, out of 2,003 that report either one.
How is overlap by weight worked out?
For each holding the two funds share, take the smaller of the two weights, then add those up. Identical portfolios score 100%.