TLT vs MBB overlap
TLT 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: TLT, SEC Form N-PORT, May 31, 2026; MBB, SEC Form N-PORT, May 31, 2026.
Largest institutions holding both
| Firm | TLT | MBB |
|---|---|---|
| Bank of America Corp. | $5.9B | $6.5B |
| JPMorgan Chase & Co | $618.4M | $3.6B |
| Envestnet Asset Management Inc. | $479.7M | $2.9B |
| Northwestern Mutual Wealth Management Co | $3.4B | $9.1M |
| LPL Financial LLC | $495.3M | $2.6B |
| BlackRock, Inc. | $2.6B | $218.5M |
| UBS Group AG | $966.9M | $1.7B |
| Morgan Stanley | $1.1B | $1.1B |
| Bank of Montreal | $1.4B | $265.0M |
| Ameriprise Financial Inc. | $160.0M | $1.3B |
| TIAA Wealth Investment Management LLC | $3K | $1.4B |
| Citigroup Inc. | $1.4B | $5.9M |
| TIAA-CREF Individual & Institutional Services, LLC | $7.7M | $725.8M |
| Jane Street Group, LLC | $699.7M | $9.7M |
| Truist Financial Corp. | $176.2M | $523.8M |
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: TLT institutional holders, MBB institutional holders.
Frequently asked questions
How much do TLT and MBB overlap?
0.0% by weight, with 0 holdings in common, using holdings for TLT as of May 31, 2026 and MBB as of May 31, 2026.
Do institutions hold both TLT and MBB?
512 Form 13F filers report positions in both, out of 1,561 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%.