NBBK
NB Bancorp, Inc. Common Stock · Financial Services · Banks - Regional
Momentum inputs (comparable managers):
holder breadth +15.4% ·
share flow +9.0% ·
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 Q2 2025
| 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 | n/a |
| Q3 2025 | 18 | 0 | 11.24M | $198.31M | n/a | n/a |
| Q2 2025 | 15 | +2 | 10.38M | $185.46M | +2 | n/a |
| Q1 2025 | 10 | +1 | 4.36M | $78.87M | +2 | −1 |
| Q4 2024 | 9 | +2 | 3.93M | $71.03M | +2 | n/a |
| Q3 2024 | 6 | 0 | 2.69M | $49.87M | n/a | n/a |
| Q2 2024 | 6 | n/a | 2.26M | $33.86M | n/a | n/a |
| # | Manager | Shares | Δ shares | Value | Their weight | Held | ||
|---|---|---|---|---|---|---|---|---|
| 1 | BlackRock ✦ (passive) | 2.88M | n/a | $51.46M | 0.0% | n/c | 1 | SEC ↗ ×11 |
| 2 | The Vanguard Group ✦ (passive) | 1.98M | n/a | $35.40M | 0.0% | n/c | 1 | SEC ↗ ×5 |
| 3 | Wellington Management ✦ | 1.86M | +15.5% | $33.23M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 4 | State Street Global Advisors ✦ (passive) | 1.12M | +3.8% | $20.02M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 5 | Geode Capital Management ✦ (passive) | 883.14K | -2.0% | $15.78M | 0.0% | ▼ Trim | 5 | SEC ↗ ×2 |
| 6 | Millennium Management ✦ | 643.07K | +153.6% | $11.49M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 7 | Marshall Wace ✦ | 315.46K | +165.9% | $5.63M | 0.0% | ▲ Add | 2 | SEC ↗ ×2 |
| 8 | Fidelity (FMR) ✦ | 301.28K | n/a | $5.38M | 0.0% | n/c | 1 | SEC ↗ ×2 |
| 9 | Renaissance Technologies ✦ | 144.15K | -28.7% | $2.57M | 0.0% | ▼ Trim | 5 | SEC ↗ |
| 10 | Two Sigma Investments ✦ | 141.23K | -6.1% | $2.52M | 0.0% | ▼ Trim | 5 | SEC ↗ |
| 11 | AQR Capital Management ✦ | 47.30K | +237.9% | $844,707 | 0.0% | ▲ Add | 2 | SEC ↗ ×3 |
| 12 | Citadel Advisors ✦ | 18.89K | New | $337,465 | 0.0% | New | 1 | SEC ↗ |
| 13 | D. E. Shaw & Co. ✦ | 18.12K | +9.7% | $323,552 | 0.0% | ▲ Add | 3 | SEC ↗ |
| 14 | T. Rowe Price ✦ | 17.65K | +3.3% | $316,000 | 0.0% | ▲ Add | 5 | SEC ↗ |
| 15 | Point72 Asset Management ✦ | 9.00K | New | $160,740 | 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 | $337,465 | 0.0% |
| Point72 Asset Management | $160,740 | 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