| Filer | Ownership | Change % | Holdings Value | Net Change | Nb Shares | Change % | Reporting Name | Report Period |
|---|---|---|---|---|---|---|---|---|
| BlackRock, Inc. | 6.7% | $47,015,321 | 2,663,833 | BlackRock, Inc. | 30 Sep 2025 | |||
| Pertento Partners LLP | 5.1% | -2% | $41,633,969 | +$3,998,788 | 2,338,987 | +11% | Pertento Partners LLP | 01 Dec 2025 |
| VANGUARD GROUP INC | 4.9% | -3% | $35,398,449 | -$2,263,951 | 1,981,996 | -6% | The Vanguard Group | 30 Jun 2025 |
As of 30 Sep 2025, 144 institutional investors reported holding 19,191,466 shares of NB Bancorp, Inc. - Common Stock, par value $0.01 per share (NBBK). This represents 42% of the company’s total 45,862,490 outstanding shares.
The largest institutional shareholders of NB Bancorp, Inc. - Common Stock, par value $0.01 per share (NBBK) together control 34% of the company’s outstanding shares — a level of ownership often associated with strong institutional conviction and long‑term capital commitment.
| Institution | Ownership % | Shares Held | Share Change % | Portfolio % | Holdings Value |
|---|---|---|---|---|---|
| BlackRock, Inc. | 6.2% | 2,822,125 | -2.1% | 0% | $49,810,508 |
| Pertento Partners LLP | 4.6% | 2,114,336 | 0% | 4.5% | $37,318,030 |
| VANGUARD GROUP INC | 4.3% | 1,950,135 | -1.6% | 0% | $34,419,883 |
| WELLINGTON MANAGEMENT GROUP LLP | 4% | 1,826,939 | -1.8% | 0.01% | $32,245,473 |
| STATE STREET CORP | 2.6% | 1,196,922 | +6.8% | 0% | $21,125,673 |
| GEODE CAPITAL MANAGEMENT, LLC | 1.9% | 876,648 | -0.74% | 0% | $15,475,514 |
| HOTCHKIS & WILEY CAPITAL MANAGEMENT LLC | 1.5% | 694,982 | +27% | 0.04% | $12,266,432 |
| MILLENNIUM MANAGEMENT LLC | 1.2% | 543,282 | -16% | 0.01% | $9,588,927 |
| GOLDMAN SACHS GROUP INC | 1.1% | 524,898 | +11% | 0% | $9,264,451 |
| UBS Group AG | 0.82% | 378,353 | +264% | 0% | $6,677,930 |
| FMR LLC | 0.71% | 324,680 | +7.8% | 0% | $5,730,603 |
| NORTHERN TRUST CORP | 0.68% | 309,699 | -2.2% | 0% | $5,466,187 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 0.63% | 287,455 | -3.9% | 0% | $5,073,581 |
| MARSHALL WACE, LLP | 0.6% | 277,100 | -12% | 0.01% | $4,890,813 |
| TWO SIGMA INVESTMENTS, LP | 0.45% | 205,869 | +46% | 0.01% | $3,633,588 |
| HENNESSY ADVISORS INC | 0.4% | 185,000 | +2.8% | 0.11% | $3,265,250 |
| EJF Capital LLC | 0.38% | 172,803 | +3% | 1.8% | $3,049,973 |
| PANAGORA ASSET MANAGEMENT INC | 0.38% | 172,662 | -23% | 0.01% | $3,047,484 |
| PROSPECTOR PARTNERS LLC | 0.33% | 150,862 | -10% | 0.32% | $2,662,714 |
| AMERICAN CENTURY COMPANIES INC | 0.3% | 137,313 | +122% | 0% | $2,423,574 |
| TWO SIGMA ADVISERS, LP | 0.29% | 134,100 | +49% | 0% | $2,366,865 |
| Financial Engines Advisors L.L.C. | 0.28% | 129,288 | +9.3% | 0% | $2,281,933 |
| FIRST TRUST ADVISORS LP | 0.27% | 125,469 | +377% | 0% | $2,214,527 |
| MORGAN STANLEY | 0.27% | 122,069 | -9.1% | 0% | $2,154,518 |
| JPMORGAN CHASE & CO | 0.26% | 119,682 | +20% | 0% | $2,112,388 |
| Period | Reported Shares, Excl. Options | Value, Excl. Options | Value Change | Price (Median) | Investors |
|---|---|---|---|---|---|
| 2025 Q4 | 118,089 | $2,333,833 | +$118,795 | $19.82 | 10 |
| 2025 Q3 | 19,191,466 | $338,803,297 | +$8,508,488 | $17.65 | 144 |
| 2025 Q2 | 18,717,578 | $334,367,604 | +$6,692,709 | $17.86 | 129 |
| 2025 Q1 | 18,345,847 | $331,321,498 | +$4,235,296 | $18.07 | 120 |
| 2024 Q4 | 18,099,643 | $326,677,743 | -$12,909,221 | $18.06 | 113 |
| 2024 Q3 | 18,798,787 | $348,790,411 | +$34,867,490 | $18.56 | 106 |
| 2024 Q2 | 16,756,519 | $253,194,867 | +$107,038,595 | $15.08 | 91 |
| 2024 Q1 | 9,585,291 | $131,014,856 | +$95,658,320 | $13.66 | 55 |
| 2023 Q4 | 2,575,613 | $34,675,619 | +$30,437,121 | $13.45 | 17 |