NB Bancorp, Inc.
NBBK- Exchange
- Nasdaq
- Industry
- Savings Institutions, Not Federally Chartered
- SEC CIK
- 0001979330
In the last 90 days, NB Bancorp, Inc. insiders filed 2 open-market purchases and 1 sale; 161 institutions reported holding it in 13F filings for Q2 2026, worth $474.9M in total; no superinvestor holds it.
13F holders, Q4 2025
Institutional positions in NB Bancorp, Inc. as of Dec 31, 2025. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works
- Institutional holders
- 164
- +21 vs. Q3 2025
- Shares held
- 22.3M
- +3.17M (+16.6%) vs. Q3 2025
- Total value
- $441.3M
- +$104.0M (+30.8%) vs. Q3 2025
- New holders
- 34
- 78 more added
- Sold out
- 13
- 35 more reduced
3 institutions that held it in Q3 2025 haven't filed for Q4 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q3 2025: new holders, sold out and not filed yet
Holders and value by quarter
Institutions reporting NBBK on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.
| Quarter | Holders | Value |
|---|---|---|
| Q2 2026 | 161 | $474.9M |
| Q1 2026 | 177 | $486.3M |
| Q4 2025 | 164 | $441.3M |
| Q3 2025 | 146 | $338.8M |
| Q2 2025 | 132 | $334.4M |
| Q1 2025 | 122 | $331.3M |
| Q4 2024 | 114 | $326.7M |
| Q3 2024 | 108 | $355.7M |
| Q2 2024 | 92 | $253.2M |
| Q1 2024 | 56 | $131.0M |
| Q4 2023 | 17 | $34.7M |
| Q3 2023 | 0 | $0 |
| Q2 2023 | 0 | $0 |
| Q1 2023 | 0 | $0 |
| Q4 2022 | 0 | $0 |
| Q3 2022 | 0 | $0 |
| Q2 2022 | 0 | $0 |
| Q1 2022 | 0 | $0 |
| Q4 2021 | 0 | $0 |
| Q3 2021 | 0 | $0 |
| Q2 2021 | 0 | $0 |
| Q1 2021 | 0 | $0 |
Institutions, Q4 2025
Shares, value and share of portfolio for each institution holding NB Bancorp, Inc.; share changes are against Q3 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| SRS Capital Advisors, Inc. | 2 | $40 | 0.00% | −681−99.7% | Reduced |
| True Wealth Design, LLC | 2 | $40 | 0.00% | +2 | New |
| Sunbelt Securities, Inc. | 5 | $99 | 0.00% | +5 | New |
| Northwestern Mutual Wealth Management Co | 6 | $119 | 0.00% | +6 | New |
| Nisa Investment Advisors, LLC | 18 | $357 | 0.00% | +4+28.6% | Added |
| Parallel Advisors, LLC | 39 | $773 | 0.00% | +19+95.0% | Added |
| American Capital Advisory, LLC | 50 | $991 | 0.00% | 00.0% | Unchanged |
| Smartleaf Asset Management LLC | 56 | $1.12K | 0.00% | +56 | New |
| Quadrant Capital Group LLC | 57 | $1.13K | 0.00% | −297−83.9% | Reduced |
| The PNC Financial Services Group, Inc. | 57 | $1.13K | 0.00% | +22+62.9% | Added |
| Rothschild Investment LLC | 87 | $1.72K | 0.00% | +59+210.7% | Added |
| Quarry LP | 115 | $2.28K | 0.00% | −1,658−93.5% | Reduced |
| Covestor Ltd | 128 | $3.00K | 0.00% | +3+2.4% | Added |
| IFP Advisors, Inc | 172 | $3.41K | 0.00% | +117+212.7% | Added |
| STRS Ohio | 200 | $3.96K | 0.00% | +200 | New |
| Optiver Holding B.V. | 212 | $4.20K | 0.00% | 00.0% | Unchanged |
| Eurizon Capital SGR S.p.A. | 275 | $5.45K | 0.00% | +275 | New |
| Eastern Bank | 288 | $5.71K | 0.00% | 00.0% | Unchanged |
| Essential Partners LLC | 494 | $9.79K | 0.00% | +89+22.0% | Added |
| GAMMA Investing LLC | 499 | $9.89K | 0.00% | +103+26.0% | Added |
| Aquatic Capital Management LLC | 519 | $10.3K | 0.00% | −11,436−95.7% | Reduced |
| Amalgamated Bank | 1,254 | $25.0K | 0.00% | −93−6.9% | Reduced |
| EverSource Wealth Advisors, LLC | 1,286 | $25.5K | 0.00% | +553+75.4% | Added |
| Advisor Group Holdings, Inc. | 1,311 | $26.0K | 0.00% | +127+10.7% | Added |
| Resources Management Corp | 1,500 | $30.0K | 0.00% | 00.0% | Unchanged |
| Rockefeller Capital Management L.P. | 1,527 | $30.3K | 0.00% | 00.0% | Unchanged |
| State of Alaska, Department of Revenue | 1,630 | $32.0K | 0.00% | 00.0% | Unchanged |
| Pension & Wealth Management Advisors, Inc. | 2,135 | $42.3K | 0.01% | 00.0% | Unchanged |
| Sterling Capital Management LLC | 2,300 | $45.6K | 0.00% | −116−4.8% | Reduced |
| Kestra Advisory Services, LLC | 2,325 | $46.1K | 0.00% | +2,325 | New |
| Tower Research Capital LLC (TRC) | 2,516 | $49.9K | 0.00% | +994+65.3% | Added |
| Ameritas Investment Partners, Inc. | 3,422 | $67.8K | 0.00% | +496+17.0% | Added |
| SHP Wealth Management | 3,454 | $68.5K | 0.01% | +3,454 | New |
| Larson Financial Group LLC | 3,629 | $71.9K | 0.00% | +3,093+577.1% | Added |
| CWM, LLC | 3,642 | $72.0K | 0.00% | +185+5.4% | Added |
| Russell Investments Group, Ltd. | 4,344 | $86.1K | 0.00% | −2,601−37.5% | Reduced |
| Allworth Financial LP | 5,835 | $115.6K | 0.00% | +5,826+64,733.3% | Added |
| Flagship Harbor Advisors, LLC | 6,436 | $127.6K | 0.01% | −5,478−46.0% | Reduced |
| KLP Kapitalforvaltning AS | 8,300 | $164.5K | 0.00% | +1,200+16.9% | Added |
| Quest Partners LLC | 9,486 | $188.0K | 0.01% | −7,396−43.8% | Reduced |
| Zurcher Kantonalbank (Zurich Cantonalbank) | 9,676 | $191.8K | 0.00% | 00.0% | Unchanged |
| Barrett & Company, Inc. | 10,000 | $198.2K | 0.07% | 00.0% | Unchanged |
| Harbor Advisors LLC | 10,000 | $198.2K | 0.03% | 00.0% | Unchanged |
| Cambridge Investment Research Advisors, Inc. | 10,465 | $207.0K | 0.00% | +10,465 | New |
| Great Oak Capital Partners, LLC | 10,636 | $207.7K | 0.05% | −20,285−65.6% | Reduced |
| Police & Firemen's Retirement System of New Jersey | 10,491 | $207.9K | 0.00% | +1,234+13.3% | Added |
| Gray Private Wealth, LLC | 10,588 | $209.9K | 0.10% | 00.0% | Unchanged |
| Afg Fiduciary Services Limited Partnership | 10,970 | $214.2K | 0.13% | +970+9.7% | Added |
| Arizona State Retirement System | 10,827 | $214.6K | 0.00% | +10,827 | New |
| Martingale Asset Management L P | 11,700 | $231.9K | 0.01% | −1,700−12.7% | Reduced |
| Farther Finance Advisors, LLC | 12,002 | $237.9K | 0.00% | +20.0% | Added |
| Diversified Trust Co | 12,284 | $243.5K | 0.00% | +12,284 | New |
| Manufacturers Life Insurance Company, The | 12,354 | $244.9K | 0.00% | +708+6.1% | Added |
| Royal Bank of Canada | 12,400 | $246.0K | 0.00% | −929−7.0% | Reduced |
| SG Americas Securities, LLC | 13,089 | $259.0K | 0.00% | −1,338−9.3% | Reduced |
| Bleakley Financial Group, LLC | 13,665 | $270.8K | 0.00% | +13,665 | New |
| Intech Investment Management LLC | 14,266 | $282.8K | 0.00% | −38−0.3% | Reduced |
| Schonfeld Strategic Advisors LLC | 14,651 | $290.4K | 0.00% | +14,651 | New |
| Janus Henderson Group PLC | 14,800 | $293.2K | 0.00% | 00.0% | Unchanged |
| HRT Financial LP | 15,064 | $298.0K | 0.00% | +15,064 | New |
| Summit Wealth Group, LLC | 15,340 | $304.0K | 0.07% | +15,340 | New |
| Acadian Asset Management LLC | 15,717 | $311.0K | 0.00% | +15,717 | New |
| Davis R M Inc | 15,930 | $315.7K | 0.01% | +15,930 | New |
| Rockland Trust Co | 15,969 | $316.5K | 0.01% | +15,969 | New |
| Y-Intercept (Hong Kong) Ltd | 16,681 | $330.6K | 0.01% | +16,681 | New |
| Mercer Global Advisors Inc | 16,698 | $331.0K | 0.00% | +16,698 | New |
| Universal- Beteiligungs- und Servicegesellschaft mbH | 16,846 | $333.9K | 0.00% | +165+1.0% | Added |
| Qube Research & Technologies Ltd | 17,352 | $343.9K | 0.00% | −69,523−80.0% | Reduced |
| NewEdge Wealth, LLC | 18,418 | $365.0K | 0.00% | +18,418 | New |
| Mirae Asset Global ETFs Holdings Ltd. | 18,550 | $367.7K | 0.00% | +2,279+14.0% | Added |
| Arrowstreet Capital, Limited Partnership | 18,866 | $373.9K | 0.00% | +18,866 | New |
| Kestra Private Wealth Services, LLC | 19,700 | $390.5K | 0.00% | +36+0.2% | Added |
| Connor, Clark & Lunn Investment Management Ltd. | 19,759 | $391.6K | 0.00% | +19,759 | New |
| Wiley Bros.-Aintree Capital, LLC | 19,830 | $393.0K | 0.00% | +10+0.1% | Added |
| Investment Advisory Group, LLC | 20,000 | $396.4K | 0.10% | 00.0% | Unchanged |
| Point72 Asset Management, L.P. | 20,905 | $414.3K | 0.00% | +8,580+69.6% | Added |
| ExodusPoint Capital Management, LP | 20,963 | $415.5K | 0.00% | −5,967−22.2% | Reduced |
| Four Tree Island Advisory LLC | 21,456 | $425.3K | 0.23% | +21,456 | New |
| Commonwealth Equity Services, LLC | 21,496 | $426.0K | 0.00% | +21,496 | New |
| Modera Wealth Management, LLC | 22,011 | $436.3K | 0.01% | 00.0% | Unchanged |
| Citigroup Inc | 22,885 | $453.6K | 0.00% | −12,706−35.7% | Reduced |
| Northeast Investment Management | 23,000 | $455.9K | 0.02% | +7,000+43.8% | Added |
| MetLife Investment Management | 23,122 | $458.3K | 0.00% | −633−2.7% | Reduced |
| Quantinno Capital Management LP | 23,321 | $462.2K | 0.00% | +23,321 | New |
| Rafferty Asset Management, LLC | 24,196 | $479.6K | 0.00% | −28,472−54.1% | Reduced |
| LPL Financial LLC | 24,328 | $482.2K | 0.00% | +6,336+35.2% | Added |
| Deutsche Bank AG | 25,025 | $496.0K | 0.00% | +4,843+24.0% | Added |
| Susquehanna Portfolio Strategies, LLC | 25,370 | $502.8K | 0.01% | −1,942−7.1% | Reduced |
| Belvedere Trading LLC | 26,577 | $526.8K | 0.10% | +26,577 | New |
| State of Wisconsin Investment Board | 26,641 | $528.0K | 0.00% | +26,641 | New |
| Brandywine Global Investment Management, LLC | 27,470 | $544.5K | 0.00% | +27,470 | New |
| Raffles Associates LP | 28,374 | $562.4K | 0.42% | −2,762−8.9% | Reduced |
| Susquehanna Fundamental Investments, LLC | 29,022 | $575.2K | 0.02% | +12,071+71.2% | Added |
| Occudo Quantitative Strategies LP | 32,155 | $637.3K | 0.04% | +13,594+73.2% | Added |
| Federated Hermes, Inc. | 34,237 | $678.6K | 0.00% | +27,454+404.7% | Added |
| California State Teachers Retirement System | 36,093 | $715.4K | 0.00% | +6,929+23.8% | Added |
| Mariner, LLC | 36,366 | $720.8K | 0.00% | +24,003+194.2% | Added |
| Aviance Capital Partners, LLC | 37,167 | $736.6K | 0.08% | 00.0% | Unchanged |
| Verition Fund Management LLC | 38,264 | $758.4K | 0.00% | +3,397+9.7% | Added |
| UBS Asset Management Americas Inc | 39,192 | $776.8K | 0.00% | +167+0.4% | Added |