NBBK
NB Bancorp, Inc. Common Stock · Financial Services · Banks - Regional
Momentum inputs (comparable managers):
holder breadth +28.6% ·
share flow +6.0% ·
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 Q4 2024
| Quarter | Holders | Δ | Shares | Reported value | New | Exits |
|---|---|---|---|---|---|---|
| Q2 2026 | 72 | -5 | 15.62M | $330.14M | +2 | −7 |
| Q1 2026 | 80 | +6 | 15.88M | $334.38M | +10 | −4 |
| Q4 2025 | 74 | +1 | 16.12M | $319.60M | +1 | — |
| Q3 2025 | 18 | 0 | 11.24M | $198.31M | — | — |
| Q2 2025 | 15 | +2 | 10.38M | $185.46M | +2 | — |
| Q1 2025 | 10 | +1 | 4.36M | $78.87M | +2 | −1 |
| Q4 2024 | 9 | +2 | 3.93M | $71.03M | +2 | — |
| Q3 2024 | 6 | 0 | 2.69M | $49.87M | — | — |
| Q2 2024 | 6 | — | 2.26M | $33.86M | — | — |
| # | Manager | Shares | Δ shares | Value | Their weight | Held | ||
|---|---|---|---|---|---|---|---|---|
| 1 | Wellington Management ✦ | 1.49M | 0.0% | $26.97M | 0.0% | Held | 3 | SEC ↗ |
| 2 | State Street Global Advisors ✦ (passive) | 1.02M | — | $18.49M | 0.0% | n/c | 1 | SEC ↗ |
| 3 | Geode Capital Management ✦ (passive) | 880.70K | -0.5% | $15.91M | 0.0% | ▼ Trim | 3 | SEC ↗ ×2 |
| 4 | Millennium Management ✦ | 224.17K | +143.6% | $4.05M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 5 | Renaissance Technologies ✦ | 165.50K | +117.2% | $2.99M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 6 | Two Sigma Investments ✦ | 112.11K | -11.6% | $2.02M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 7 | T. Rowe Price ✦ | 15.03K | +18.0% | $272,000 | 0.0% | ▲ Add | 3 | SEC ↗ |
| 8 | D. E. Shaw & Co. ✦ | 11.73K | New | $211,898 | 0.0% | New | 1 | SEC ↗ |
| 9 | Citadel Advisors ✦ | 6.21K | New | $112,153 | 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
| D. E. Shaw & Co. | $211,898 | 0.0% |
| Citadel Advisors | $112,153 | 0.0% |
Exited
| No tracked exits this quarter. |
Full-market context: across ALL 13F filers (SEC structured data, Q1 2026): 175 holders, 23.05M shares, $472.61M 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.
Open-market purchases (P)
Officer, Director · President & CEO · 2.00K sh @ 21.75 · $43,500
Officer · SEVP and CFO · 200 sh @ 21.80 · $4,360
Open-market sales (S)
Officer · 2.00K sh · $45,860
Awards, exercises and tax withholding are never counted as buys or sales here. Methodology