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, Q3 2025
Institutional positions in NB Bancorp, Inc. as of Sep 30, 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
- 146
- +14 vs. Q2 2025
- Shares held
- 19.2M
- +474.2K (+2.5%) vs. Q2 2025
- Total value
- $338.8M
- +$4.44M (+1.3%) vs. Q2 2025
- New holders
- 27
- 45 more added
- Sold out
- 13
- 45 more reduced
Compare with Q2 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, Q3 2025
Shares, value and share of portfolio for each institution holding NB Bancorp, Inc.; share changes are against Q2 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| BlackRock, Inc. | 2,822,125 | $49.8M | 0.00% | −59,232−2.1% | Reduced |
| Pertento Partners LLP | 2,114,336 | $37.3M | 4.55% | 00.0% | Unchanged |
| Vanguard Group Inc | 1,950,135 | $34.4M | 0.00% | −31,861−1.6% | Reduced |
| Wellington Management Group LLP | 1,826,939 | $32.2M | 0.01% | −33,650−1.8% | Reduced |
| State Street Corp | 1,196,922 | $21.1M | 0.00% | +76,259+6.8% | Added |
| Geode Capital Management, LLC | 876,648 | $15.5M | 0.00% | −6,493−0.7% | Reduced |
| Hotchkis & Wiley Capital Management LLC | 694,982 | $12.3M | 0.04% | +148,472+27.2% | Added |
| Millennium Management LLC | 543,282 | $9.59M | 0.01% | −99,789−15.5% | Reduced |
| Goldman Sachs Group Inc | 524,898 | $9.26M | 0.00% | +50,142+10.6% | Added |
| UBS Group AG | 378,353 | $6.68M | 0.00% | +274,511+264.4% | Added |
| FMR LLC | 324,680 | $5.73M | 0.00% | +23,403+7.8% | Added |
| Northern Trust Corp | 309,699 | $5.47M | 0.00% | −7,062−2.2% | Reduced |
| Charles Schwab Investment Management Inc | 287,455 | $5.07M | 0.00% | −11,532−3.9% | Reduced |
| Marshall Wace, LLP | 277,100 | $4.89M | 0.01% | −38,360−12.2% | Reduced |
| Two Sigma Investments, LP | 205,869 | $3.63M | 0.01% | +64,635+45.8% | Added |
| Hennessy Advisors Inc | 185,000 | $3.27M | 0.11% | +5,000+2.8% | Added |
| EJF Capital LLC | 172,803 | $3.05M | 1.77% | +4,973+3.0% | Added |
| Panagora Asset Management Inc | 172,662 | $3.05M | 0.01% | −52,919−23.5% | Reduced |
| Prospector Partners LLC | 150,862 | $2.66M | 0.32% | −16,760−10.0% | Reduced |
| American Century Companies Inc | 137,313 | $2.42M | 0.00% | +75,378+121.7% | Added |
| Two Sigma Advisers, LP | 134,100 | $2.37M | 0.00% | +44,400+49.5% | Added |
| Financial Engines Advisors L.L.C. | 129,288 | $2.28M | 0.00% | +10,989+9.3% | Added |
| First Trust Advisors LP | 125,469 | $2.21M | 0.00% | +99,165+377.0% | Added |
| Morgan Stanley | 122,069 | $2.15M | 0.00% | −12,268−9.1% | Reduced |
| JPMorgan Chase & Co | 119,682 | $2.11M | 0.00% | +19,616+19.6% | Added |
| Bridgeway Capital Management, LLC | 114,812 | $2.03M | 0.04% | +114,812 | New |
| Mangrove Partners | 114,117 | $2.01M | 0.17% | +10,374+10.0% | Added |
| Renaissance Technologies LLC | 110,900 | $1.96M | 0.00% | −33,248−23.1% | Reduced |
| Nuveen, LLC | 108,744 | $1.92M | 0.00% | 00.0% | Unchanged |
| Bank of New York Mellon Corp | 98,830 | $1.74M | 0.00% | −4,706−4.5% | Reduced |
| International Assets Investment Management, LLC | 86,900 | $1.59M | 0.13% | 00.0% | Unchanged |
| Qube Research & Technologies Ltd | 86,875 | $1.53M | 0.00% | −13,797−13.7% | Reduced |
| Cubist Systematic Strategies, LLC | 85,522 | $1.51M | 0.02% | +11,608+15.7% | Added |
| Colony Group, LLC | 85,412 | $1.51M | 0.00% | +59+0.1% | Added |
| Oppenheimer & Close, LLC | 82,999 | $1.46M | 0.99% | 00.0% | Unchanged |
| AQR Capital Management LLC | 81,569 | $1.44M | 0.00% | +34,273+72.5% | Added |
| Stilwell Value LLC | 80,000 | $1.41M | 0.66% | 00.0% | Unchanged |
| Empowered Funds, LLC | 79,812 | $1.41M | 0.01% | +79,812 | New |
| Ameriprise Financial Inc | 78,400 | $1.38M | 0.00% | −10,500−11.8% | Reduced |
| Trexquant Investment LP | 73,724 | $1.30M | 0.01% | +21,943+42.4% | Added |
| Bank of America Corp | 65,420 | $1.15M | 0.00% | −64,532−49.7% | Reduced |
| Swiss National Bank | 63,500 | $1.12M | 0.00% | −12,400−16.3% | Reduced |
| Legal & General Group Plc | 62,014 | $1.09M | 0.00% | 00.0% | Unchanged |
| Citadel Advisors LLC | 59,327 | $1.05M | 0.00% | +40,432+214.0% | Added |
| Lynch & Associates | 56,334 | $994.3K | 0.19% | −517−0.9% | Reduced |
| Jane Street Group, LLC | 54,191 | $956.5K | 0.00% | +27,507+103.1% | Added |
| Rhumbline Advisers | 53,177 | $938.6K | 0.00% | −7,342−12.1% | Reduced |
| Barclays PLC | 52,878 | $933.3K | 0.00% | −29,024−35.4% | Reduced |
| Invesco Ltd. | 52,876 | $933.3K | 0.00% | +10,132+23.7% | Added |
| Rafferty Asset Management, LLC | 52,668 | $929.6K | 0.00% | +17,039+47.8% | Added |
| Lazard Asset Management LLC | 51,770 | $913.7K | 0.00% | +51,770 | New |
| Victory Capital Management Inc | 51,670 | $912.0K | 0.00% | −60,439−53.9% | Reduced |
| Integrated Wealth Concepts LLC | 47,114 | $831.6K | 0.01% | −2,626−5.3% | Reduced |
| Los Angeles Capital Management LLC | 46,680 | $823.9K | 0.00% | +8,223+21.4% | Added |
| Principal Financial Group Inc | 44,090 | $778.2K | 0.00% | +3,823+9.5% | Added |
| D. E. Shaw & Co., Inc. | 42,624 | $752.3K | 0.00% | +24,508+135.3% | Added |
| Jacobs Levy Equity Management, Inc | 41,766 | $737.2K | 0.00% | −7,793−15.7% | Reduced |
| Alliancebernstein L.P. | 40,730 | $718.9K | 0.00% | 00.0% | Unchanged |
| UBS Asset Management Americas Inc | 39,025 | $688.8K | 0.00% | −54,360−58.2% | Reduced |
| Aviance Capital Partners, LLC | 37,167 | $656.0K | 0.08% | 00.0% | Unchanged |
| Citigroup Inc | 35,591 | $628.2K | 0.00% | −1,710−4.6% | Reduced |
| Round Rock Advisors, LLC | 33,970 | $620.6K | 0.10% | +33,970 | New |
| Verition Fund Management LLC | 34,867 | $615.4K | 0.00% | +34,867 | New |
| Raffles Associates LP | 31,136 | $549.5K | 0.51% | 00.0% | Unchanged |
| Great Oak Capital Partners, LLC | 30,921 | $543.6K | 0.14% | −30,733−49.8% | Reduced |
| California State Teachers Retirement System | 29,164 | $514.7K | 0.00% | −6,070−17.2% | Reduced |
| Creative Planning | 28,670 | $506.0K | 0.00% | +9,562+50.0% | Added |
| Susquehanna Portfolio Strategies, LLC | 27,312 | $482.1K | 0.01% | +3,139+13.0% | Added |
| Balyasny Asset Management LLC | 27,241 | $480.8K | 0.00% | +27,241 | New |
| ExodusPoint Capital Management, LP | 26,930 | $475.3K | 0.01% | +26,930 | New |
| Wells Fargo & Company | 26,853 | $474.0K | 0.00% | +4,379+19.5% | Added |
| BNP Paribas Arbitrage, SA | 26,447 | $466.8K | 0.00% | −10,092−27.6% | Reduced |
| Squarepoint Ops LLC | 25,255 | $445.8K | 0.00% | +25,255 | New |
| MetLife Investment Management | 23,755 | $419.3K | 0.00% | 00.0% | Unchanged |
| SEI Investments Co | 23,503 | $414.8K | 0.00% | +4,400+23.0% | Added |
| Modera Wealth Management, LLC | 22,011 | $388.5K | 0.00% | 00.0% | Unchanged |
| Deutsche Bank AG | 20,182 | $356.2K | 0.00% | −157,872−88.7% | Reduced |
| Investment Advisory Group, LLC | 20,000 | $353.0K | 0.10% | 00.0% | Unchanged |
| Wiley Bros.-Aintree Capital, LLC | 19,820 | $349.8K | 0.00% | +10+0.1% | Added |
| Polymer Capital Management (US) LLC | 19,819 | $349.8K | 0.05% | +19,819 | New |
| Kestra Private Wealth Services, LLC | 19,664 | $347.1K | 0.00% | +37+0.2% | Added |
| Price T Rowe Associates Inc | 18,560 | $328.0K | 0.00% | +907+5.1% | Added |
| Occudo Quantitative Strategies LP | 18,561 | $327.6K | 0.04% | −5,284−22.2% | Reduced |
| Susquehanna International Group, LLP | 18,537 | $327.2K | 0.00% | −43,956−70.3% | Reduced |
| LPL Financial LLC | 17,992 | $317.6K | 0.00% | −3,524−16.4% | Reduced |
| Susquehanna Fundamental Investments, LLC | 16,951 | $299.2K | 0.01% | −60.0% | Reduced |
| Quest Partners LLC | 16,882 | $298.0K | 0.02% | +16,882 | New |
| Universal- Beteiligungs- und Servicegesellschaft mbH | 16,681 | $294.4K | 0.00% | +16,681 | New |
| Mirae Asset Global ETFs Holdings Ltd. | 16,271 | $287.2K | 0.00% | −2,914−15.2% | Reduced |
| Northeast Investment Management | 16,000 | $282.4K | 0.01% | 00.0% | Unchanged |
| Janus Henderson Group PLC | 14,800 | $261.4K | 0.00% | 00.0% | Unchanged |
| Integrated Quantitative Investments LLC | 14,542 | $256.7K | 0.07% | +14,542 | New |
| SG Americas Securities, LLC | 14,427 | $255.0K | 0.00% | −98−0.7% | Reduced |
| Intech Investment Management LLC | 14,304 | $252.5K | 0.00% | −1,676−10.5% | Reduced |
| Martingale Asset Management L P | 13,400 | $236.5K | 0.01% | 00.0% | Unchanged |
| Royal Bank of Canada | 13,329 | $236.0K | 0.00% | −4,829−26.6% | Reduced |
| Tudor Investment Corp Et Al | 13,169 | $232.4K | 0.00% | +13,169 | New |
| Mariner, LLC | 12,363 | $218.2K | 0.00% | +12,363 | New |
| Point72 Asset Management, L.P. | 12,325 | $217.5K | 0.00% | +3,325+36.9% | Added |
| Farther Finance Advisors, LLC | 12,000 | $211.8K | 0.00% | 00.0% | Unchanged |