Data from public SEC 13F & STOCK Act filings, delayed up to ~45 days, partial holdings only — for research, not investment advice.
MBB
ISHARES MBS ETFData as of 2026 Q1 (03-31) · 13F snapshot
Summary
ISHARES MBS ETF (MBB) is held by 6 tracked hedge-fund managers, a combined reported value of ~$242.37M; the largest are Ray Dalio, Izzy Englander, Steven Cohen. This quarter: 1 new, 1 added, 1 trimmed, 1 closed. 7 members of Congress have disclosed STOCK Act trades. Data as of 2026 Q1, from public SEC 13F filings, delayed up to ~45 days.
Attention · MediumThis quarter · Mixed
Gurus holding6
Congress trades7
Price$94.38vs quarter-end-0.60%
Sectors0
This quarter's moves
Top holderRay DalioNew1
Added1
Trimmed / sold2
Value $46.89M— of portfolio500,0002025 Q1
Value $28.34M— of portfolio301,2002023 Q4
Value $18.32M— of portfolio200,0002022 Q3
Joel GreenblattHold
Value $1.35M0.0% of portfolio14,2262026 Q1
Value $959.0K— of portfolio10,1002026 Q1
Steven CohenHold
Value $937.8K0.0% of portfolio10,0002025 Q1
Value $462.1K— of portfolio5,0002024 Q1
Value $427.3K— of portfolio4,5002026 Q1
| Investor | Value | % of portfolio | Action |
|---|---|---|---|
| Izzy EnglanderCALL | $46.89M | — | — |
| Steven CohenCALL | $28.34M | — | — |
| Izzy EnglanderPUT | $18.32M | — | — |
| Joel Greenblatt | $1.35M | 0.0% | Hold |
| Ken GriffinCALL | $959.0K | — | — |
| Steven Cohen | $937.8K | 0.0% | Hold |
| Steven CohenPUT | $462.1K | — | — |
| Ken GriffinPUT | $427.3K | — | — |