Security record · archived quarter
NBBK
NB Bancorp, Inc. Common Stock · Financial Services · Banks - Regional
80Tracked holders
+6Δ holders
15.88MShares held
$334.38MReported value
+10New positions
−4Exits
Momentum inputs (comparable managers):
holder breadth +8.1% ·
share flow +2.3% ·
net new positions +7.5%
— formula
Broad accumulation — rising shares across more holders
All ownership figures: tracked 13F managers only, common-stock positions, reporting period Q1 2026
Ownership over time
| 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 | — | — |
Who holds it · Q1 2026
| # | Manager | Shares | Δ shares | Value | Their weight | Held | ||
|---|---|---|---|---|---|---|---|---|
| 1 | BlackRock ✦ (passive) | 3.08M | -0.6% | $64.98M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 2 | BlackRock ✦ (passive) | 3.08M | -0.6% | $64.98M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 3 | BlackRock ✦ (passive) | 3.08M | -0.6% | $64.98M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 4 | BlackRock ✦ (passive) | 3.08M | -0.6% | $64.98M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 5 | BlackRock ✦ (passive) | 3.08M | -0.6% | $64.98M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 6 | BlackRock ✦ (passive) | 3.08M | -0.6% | $64.98M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 7 | BlackRock ✦ (passive) | 3.08M | -0.6% | $64.98M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 8 | BlackRock ✦ (passive) | 3.08M | -0.6% | $64.98M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 9 | BlackRock ✦ (passive) | 3.08M | -0.6% | $64.98M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 10 | BlackRock ✦ (passive) | 3.08M | -0.6% | $64.98M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 11 | Vanguard Capital Management Llc | 1.70M | — | $35.90M | 0.0% | n/c | 1 | SEC ↗ |
| 12 | State Street Global Advisors ✦ (passive) | 1.29M | +16.1% | $27.25M | 0.0% | ▲ Add | 6 | SEC ↗ |
| 13 | Geode Capital Management ✦ (passive) | 1.10M | +13.7% | $23.16M | 0.0% | ▲ Add | 8 | SEC ↗ |
| 14 | Geode Capital Management ✦ (passive) | 1.10M | +13.7% | $23.16M | 0.0% | ▲ Add | 8 | SEC ↗ |
| 15 | Wellington Management ✦ | 710.00K | -51.7% | $14.96M | 0.0% | ▼ Trim | 8 | SEC ↗ |
| 16 | Goldman Sachs Group ✦ | 691.67K | +16.5% | $14.57M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 17 | Goldman Sachs Group ✦ | 691.67K | +16.5% | $14.57M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 18 | Dimensional Fund Advisors Lp | 522.38K | +81.4% | $11.01M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 19 | Dimensional Fund Advisors Lp | 522.38K | +81.4% | $11.01M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 20 | Dimensional Fund Advisors Lp | 522.38K | +81.4% | $11.01M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 21 | Dimensional Fund Advisors Lp | 522.38K | +81.4% | $11.01M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 22 | Nuveen, LLC | 488.03K | +40.7% | $10.28M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 23 | Nuveen, LLC | 488.03K | +40.7% | $10.28M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 24 | Nuveen, LLC | 488.03K | +40.7% | $10.28M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 25 | Hotchkis & Wiley Capital Management… | 450.77K | -35.8% | $9.50M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 26 | Fidelity (FMR) ✦ | 437.73K | +14.2% | $9.22M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 27 | Fidelity (FMR) ✦ | 437.73K | +14.2% | $9.22M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 28 | Two Sigma Investments ✦ | 371.81K | +47.0% | $7.83M | 0.0% | ▲ Add | 8 | SEC ↗ |
| 29 | Northern Trust Corp | 335.36K | +3.4% | $7.07M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 30 | Northern Trust Corp | 335.36K | +3.4% | $7.07M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 31 | Northern Trust Corp | 335.36K | +3.4% | $7.07M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 32 | Northern Trust Corp | 335.36K | +3.4% | $7.07M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 33 | Northern Trust Corp | 335.36K | +3.4% | $7.07M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 34 | Charles Schwab Investment… | 318.37K | -3.4% | $6.71M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 35 | Sei Investments Co | 302.18K | +110.2% | $6.37M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 36 | Sei Investments Co | 302.18K | +110.2% | $6.37M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 37 | Morgan Stanley ✦ | 279.87K | +15.6% | $5.90M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 38 | Morgan Stanley ✦ | 279.87K | +15.6% | $5.90M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 39 | Morgan Stanley ✦ | 279.87K | +15.6% | $5.90M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 40 | Morgan Stanley ✦ | 279.87K | +15.6% | $5.90M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 41 | Morgan Stanley ✦ | 279.87K | +15.6% | $5.90M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 42 | Morgan Stanley ✦ | 279.87K | +15.6% | $5.90M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 43 | Morgan Stanley ✦ | 279.87K | +15.6% | $5.90M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 44 | Morgan Stanley ✦ | 279.87K | +15.6% | $5.90M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 45 | Morgan Stanley ✦ | 279.87K | +15.6% | $5.90M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 46 | Morgan Stanley ✦ | 279.87K | +15.6% | $5.90M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 47 | Renaissance Technologies ✦ | 263.91K | +5.0% | $5.56M | 0.0% | ▲ Add | 8 | SEC ↗ |
| 48 | American Century Companies Inc | 263.66K | +18.8% | $5.56M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 49 | New York State Common Retirement… | 260.58K | +80.5% | $5.49M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 50 | Qube Research & Technologies Ltd | 175.07K | +908.9% | $3.69M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 51 | Millennium Management ✦ | 158.24K | +188.4% | $3.33M | 0.0% | ▲ Add | 8 | SEC ↗ |
| 52 | Bank of New York Mellon Corp | 148.07K | -0.8% | $3.12M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 53 | Bank of New York Mellon Corp | 148.07K | -0.8% | $3.12M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 54 | First Trust Advisors Lp | 140.26K | -1.3% | $2.96M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 55 | AQR Capital Management ✦ | 128.82K | +22.7% | $2.71M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 56 | AQR Capital Management ✦ | 128.82K | +22.7% | $2.71M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 57 | AQR Capital Management ✦ | 128.82K | +22.7% | $2.71M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 58 | AQR Capital Management ✦ | 128.82K | +22.7% | $2.71M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 59 | AQR Capital Management ✦ | 128.82K | +22.7% | $2.71M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 60 | AQR Capital Management ✦ | 128.82K | +22.7% | $2.71M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 61 | AQR Capital Management ✦ | 128.82K | +22.7% | $2.71M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 62 | Financial Engines Advisors L.L.C. | 125.72K | +6.8% | $2.65M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 63 | Alliancebernstein L.P. | 130.22K | -48.8% | $2.58M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 64 | Bank Of America Corp /De/ | 118.80K | +31.1% | $2.50M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 65 | Bank Of America Corp /De/ | 118.80K | +31.1% | $2.50M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 66 | Citadel Advisors ✦ | 116.37K | +9.3% | $2.45M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 67 | Invesco Ltd. | 101.24K | +59.9% | $2.13M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 68 | Invesco Ltd. | 101.24K | +59.9% | $2.13M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 69 | Invesco Ltd. | 101.24K | +59.9% | $2.13M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 70 | Invesco Ltd. | 101.24K | +59.9% | $2.13M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 71 | Focus Partners Wealth | 92.81K | +1.6% | $1.96M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 72 | Swiss National Bank | 77.10K | 0.0% | $1.62M | 0.0% | Held | 2 | SEC ↗ |
| 73 | UBS Group AG | 76.12K | -47.9% | $1.60M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 74 | UBS Group AG | 76.12K | -47.9% | $1.60M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 75 | Creative Planning | 70.91K | +35.1% | $1.49M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 76 | D. E. Shaw & Co. ✦ | 70.39K | +53.8% | $1.48M | 0.0% | ▲ Add | 6 | SEC ↗ |
| 77 | Credit Agricole S A | 70.00K | New | $1.47M | 0.0% | New | 1 | SEC ↗ |
| 78 | Jane Street Group, Llc | 60.67K | -25.7% | $1.28M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 79 | Lazard Asset Management Llc | 57.30K | +9.9% | $1.21M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 80 | Principal Financial Group Inc | 55.36K | -14.1% | $1.17M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 81 | Principal Financial Group Inc | 55.36K | -14.1% | $1.17M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 82 | Rhumbline Advisers | 53.17K | +1.9% | $1.12M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 83 | Legal & General Group Plc | 53.01K | -12.6% | $1.12M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 84 | Legal & General Group Plc | 53.01K | -12.6% | $1.12M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 85 | Legal & General Group Plc | 53.01K | -12.6% | $1.12M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 86 | Bnp Paribas Financial Markets | 53.01K | -25.2% | $1.12M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 87 | Susquehanna International Group, Llp | 51.59K | New | $1.09M | 0.0% | New | 1 | SEC ↗ |
| 88 | Mackenzie Financial Corp | 50.90K | New | $1.07M | 0.0% | New | 1 | SEC ↗ |
| 89 | Mariner, LLC | 49.49K | +36.1% | $1.04M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 90 | Mariner, LLC | 49.49K | +36.1% | $1.04M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 91 | Ameriprise Financial Inc | 41.96K | -46.6% | $884,076 | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 92 | T. Rowe Price ✦ | 41.07K | +4.0% | $866,000 | 0.0% | ▲ Add | 8 | SEC ↗ |
| 93 | Arrowstreet Capital ✦ | 40.28K | +113.5% | $848,615 | 0.0% | ▲ Add | 2 | SEC ↗ |
| 94 | UBS AM, a distinct business unit of… | 39.36K | +0.4% | $829,358 | 0.0% | ▲ Add | 2 | SEC ↗ |
| 95 | UBS AM, a distinct business unit of… | 39.36K | +0.4% | $829,358 | 0.0% | ▲ Add | 2 | SEC ↗ |
| 96 | California State Teachers… | 35.80K | -0.8% | $754,243 | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 97 | JPMorgan Chase ✦ | 36.09K | -39.0% | $746,299 | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 98 | JPMorgan Chase ✦ | 36.09K | -39.0% | $746,299 | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 99 | JPMorgan Chase ✦ | 36.09K | -39.0% | $746,299 | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 100 | JPMorgan Chase ✦ | 36.09K | -39.0% | $746,299 | 0.0% | ▼ Trim | 3 | SEC ↗ |
“Their weight” = the position's share of that manager's reported 13F equity value — the conviction measure. ✦ = curated manager.
New buyers
| Credit Agricole S A | $1.47M | 0.0% |
| Susquehanna International… | $1.09M | 0.0% |
| Mackenzie Financial Corp | $1.07M | 0.0% |
Exited
| Marshall Wace | $4.98M | was 0.0% |
| Belvedere Trading LLC | $526,756 | was 0.1% |
| Point72 Asset Management | $414,337 | was 0.0% |
| Hrt Financial Lp | $298,000 | was 0.0% |
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.
Frequently co-owned
What else this security's tracked holders most often hold — shared-ownership counts, not fundamental relationships.
Open-market purchases (P)
Aug 20
CAMPANELLI JOSEPH P
Officer, Director · President & CEO · 2.00K sh @ 21.75 · $43,500
Aug 20
Lapointe Jean-Pierre
Officer · SEVP and CFO · 200 sh @ 21.80 · $4,360
Open-market sales (S)
Aug 14
Henkin Kevin
Officer · 2.00K sh · $45,860
Awards, exercises and tax withholding are never counted as buys or sales here. Methodology
Provenance: Ownership from parsed 13F common-stock positions (tracked universe, comparable sets for changes); insider rows from Forms 3/4/5; stakes from Schedules 13D/13G; every filing links to its original on SEC EDGAR.
Reporting period: Q1 2026 ·
Methodology ·
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