MRBK
name pending profile ingest
Momentum inputs (comparable managers):
holder breadth +15.4% ·
share flow +10.4% ·
net new positions +13.3%
— formula
Broad accumulation — rising shares across more holders
All ownership figures: tracked 13F managers only, common-stock positions, reporting period Q3 2025
| Quarter | Holders | Δ | Shares | Reported value | New | Exits |
|---|---|---|---|---|---|---|
| Q2 2026 | 49 | +1 | 4.97M | $97.79M | +4 | −3 |
| Q1 2026 | 50 | +3 | 4.11M | $74.78M | +6 | −3 |
| Q4 2025 | 47 | +1 | 3.82M | $67.11M | +1 | — |
| Q3 2025 | 15 | +2 | 2.06M | $32.49M | +2 | — |
| Q2 2025 | 10 | 0 | 1.76M | $22.73M | — | — |
| Q1 2025 | 7 | +1 | 602.93K | $8.68M | +1 | — |
| Q4 2024 | 6 | 0 | 319.70K | $4.38M | — | — |
| Q3 2024 | 5 | +1 | 207.25K | $2.62M | +1 | — |
| Q2 2024 | 4 | — | 150.42K | $1.58M | — | — |
| # | Manager | Shares | Δ shares | Value | Their weight | Held | ||
|---|---|---|---|---|---|---|---|---|
| 1 | The Vanguard Group ✦ (passive) | 579.57K | -3.3% | $9.15M | 0.0% | ▼ Trim | 2 | SEC ↗ ×3 |
| 2 | BlackRock ✦ (passive) | 521.48K | +2.5% | $8.23M | 0.0% | ▲ Add | 2 | SEC ↗ ×5 |
| 3 | Geode Capital Management ✦ (passive) | 211.88K | -0.5% | $3.35M | 0.0% | ▼ Trim | 6 | SEC ↗ ×2 |
| 4 | Arrowstreet Capital ✦ | 171.76K | +99.3% | $2.71M | 0.0% | ▲ Add | 6 | SEC ↗ |
| 5 | Marshall Wace ✦ | 106.00K | +5.2% | $1.67M | 0.0% | ▲ Add | 3 | SEC ↗ ×2 |
| 6 | State Street Global Advisors ✦ (passive) | 100.16K | +12.7% | $1.58M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 7 | Two Sigma Investments ✦ | 82.84K | New | $1.31M | 0.0% | New | 1 | SEC ↗ |
| 8 | Citadel Advisors ✦ | 71.55K | +59.4% | $1.13M | 0.0% | ▲ Add | 5 | SEC ↗ ×2 |
| 9 | Goldman Sachs Group ✦ | 64.42K | — | $1.02M | 0.0% | n/c | 1 | SEC ↗ ×2 |
| 10 | Renaissance Technologies ✦ | 62.60K | +18.3% | $988,454 | 0.0% | ▲ Add | 6 | SEC ↗ |
| 11 | AQR Capital Management ✦ | 25.96K | New | $409,862 | 0.0% | New | 1 | SEC ↗ ×4 |
| 12 | Millennium Management ✦ | 23.48K | -65.9% | $370,733 | 0.0% | ▼ Trim | 6 | SEC ↗ |
| 13 | JPMorgan Chase ✦ | 19.10K | — | $301,526 | 0.0% | n/c | 1 | SEC ↗ ×4 |
| 14 | Morgan Stanley ✦ | 16.80K | — | $265,278 | 0.0% | n/c | 1 | SEC ↗ ×5 |
| 15 | Fidelity (FMR) ✦ | 18 | +500.0% | $284 | 0.0% | ▲ Add | 2 | SEC ↗ |
“Their weight” = the position's share of that manager's reported 13F equity value — the conviction measure. ✦ = curated manager.
New buyers
| Two Sigma Investments | $1.31M | 0.0% |
| AQR Capital Management | $409,862 | 0.0% |
Exited
| No tracked exits this quarter. |
Full-market context: across ALL 13F filers (SEC structured data, Q1 2026): 45 holders, 507.90K shares, $3.69M 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.