MBB
iShares MBS ETF · Financial Services · Asset Management - Bonds
Momentum inputs (comparable managers):
holder breadth +30.0% ·
share flow +8.1% ·
net new positions +20.0%
— formula
Broad accumulation — rising shares across more holders
All ownership figures: tracked 13F managers only, common-stock positions, reporting period Q3 2024
| Quarter | Holders | Δ | Shares | Reported value | New | Exits |
|---|---|---|---|---|---|---|
| Q2 2026 | 82 | 0 | 263.69M | $24.94B | +3 | −3 |
| Q1 2026 | 83 | 0 | 262.21M | $24.89B | +7 | −7 |
| Q4 2025 | 82 | +1 | 240.46M | $22.89B | +1 | — |
| Q3 2025 | 10 | +1 | 139.84M | $13.31B | +1 | — |
| Q2 2025 | 6 | -1 | 25.46M | $2.39B | — | −1 |
| Q1 2025 | 5 | -2 | 22.52M | $2.11B | — | −2 |
| Q4 2024 | 7 | +1 | 21.62M | $1.98B | +1 | — |
| Q3 2024 | 6 | +2 | 19.96M | $1.91B | +3 | −1 |
| Q2 2024 | 4 | — | 18.47M | $1.70B | — | — |
| # | Manager | Shares | Δ shares | Value | Their weight | Held | ||
|---|---|---|---|---|---|---|---|---|
| 1 | Fisher Asset Management ✦ | 18.27M | +8.3% | $1.75B | 0.7% | ▲ Add | 2 | SEC ↗ |
| 2 | Bridgewater Associates ✦ | 1.42M | -2.6% | $135.69M | 0.8% | ▼ Trim | 2 | SEC ↗ |
| 3 | Marshall Wace ✦ | 159.40K | +11.2% | $15.27M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 4 | Citadel Advisors ✦ | 104.95K | New | $10.06M | 0.0% | New | 1 | SEC ↗ |
| 5 | Point72 Asset Management ✦ | 10.00K | New | $958,100 | 0.0% | New | 1 | SEC ↗ |
| 6 | AQR Capital Management ✦ | 8.07K | New | $773,343 | 0.0% | New | 1 | SEC ↗ |
“Their weight” = the position's share of that manager's reported 13F equity value — the conviction measure. ✦ = curated manager.
New buyers
| Citadel Advisors | $10.06M | 0.0% |
| Point72 Asset Management | $958,100 | 0.0% |
| AQR Capital Management | $773,343 | 0.0% |
Exited
| Millennium Management | $629,174 | was 0.0% |
Full-market context: across ALL 13F filers (SEC structured data, Q1 2026): 1,012 holders, 329.07M shares, $30.56B reported. This is a different, older period than the tracked-universe figures above and the two are never mixed.
What else this security's tracked holders most often hold — shared-ownership counts, not fundamental relationships.