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, Q2 2025
Institutional positions in NB Bancorp, Inc. as of Jun 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
- 132
- +11 vs. Q1 2025
- Shares held
- 18.7M
- +373.9K (+2.0%) vs. Q1 2025
- Total value
- $334.4M
- +$3.09M (+0.9%) vs. Q1 2025
- New holders
- 22
- 44 more added
- Sold out
- 11
- 45 more reduced
1 institution that held it in Q1 2025 haven't filed for Q2 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q1 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, Q2 2025
Shares, value and share of portfolio for each institution holding NB Bancorp, Inc.; share changes are against Q1 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| BlackRock, Inc. | 2,881,357 | $51.5M | 0.00% | −259,490−8.3% | Reduced |
| Pertento Partners LLP | 2,114,336 | $37.8M | 4.26% | +135,433+6.8% | Added |
| Vanguard Group Inc | 1,981,996 | $35.4M | 0.00% | −126,761−6.0% | Reduced |
| Wellington Management Group LLP | 1,860,589 | $33.2M | 0.01% | +250,000+15.5% | Added |
| State Street Corp | 1,120,663 | $20.0M | 0.00% | +40,561+3.8% | Added |
| Geode Capital Management, LLC | 883,141 | $15.8M | 0.00% | −18,523−2.1% | Reduced |
| Millennium Management LLC | 643,071 | $11.5M | 0.01% | +389,528+153.6% | Added |
| Hotchkis & Wiley Capital Management LLC | 546,510 | $9.76M | 0.03% | +19,700+3.7% | Added |
| Goldman Sachs Group Inc | 474,756 | $8.48M | 0.00% | +3,333+0.7% | Added |
| Northern Trust Corp | 316,761 | $5.66M | 0.00% | −31,055−8.9% | Reduced |
| Marshall Wace, LLP | 315,460 | $5.63M | 0.01% | +196,837+165.9% | Added |
| FMR LLC | 301,277 | $5.38M | 0.00% | +6,699+2.3% | Added |
| Charles Schwab Investment Management Inc | 298,987 | $5.34M | 0.00% | −12,449−4.0% | Reduced |
| Panagora Asset Management Inc | 225,581 | $4.03M | 0.02% | +44,299+24.4% | Added |
| Hennessy Advisors Inc | 180,000 | $3.21M | 0.11% | −15,000−7.7% | Reduced |
| Deutsche Bank AG | 178,054 | $3.18M | 0.00% | −2,761−1.5% | Reduced |
| EJF Capital LLC | 167,830 | $3.00M | 2.39% | +97,867+139.9% | Added |
| Prospector Partners LLC | 167,622 | $2.99M | 0.35% | −74,650−30.8% | Reduced |
| Renaissance Technologies LLC | 144,148 | $2.57M | 0.00% | −58,052−28.7% | Reduced |
| Two Sigma Investments, LP | 141,234 | $2.52M | 0.00% | −9,163−6.1% | Reduced |
| Morgan Stanley | 134,337 | $2.40M | 0.00% | −117,307−46.6% | Reduced |
| Bank of America Corp | 129,952 | $2.32M | 0.00% | −173,768−57.2% | Reduced |
| Financial Engines Advisors L.L.C. | 118,299 | $2.11M | 0.00% | +118,299 | New |
| Victory Capital Management Inc | 112,109 | $2.00M | 0.00% | −4,090−3.5% | Reduced |
| Nuveen, LLC | 108,744 | $1.94M | 0.00% | −23,514−17.8% | Reduced |
| UBS Group AG | 103,842 | $1.85M | 0.00% | +45,948+79.4% | Added |
| Mangrove Partners | 103,743 | $1.85M | 0.20% | 00.0% | Unchanged |
| Bank of New York Mellon Corp | 103,536 | $1.85M | 0.00% | +1,909+1.9% | Added |
| Qube Research & Technologies Ltd | 100,672 | $1.80M | 0.00% | +21,072+26.5% | Added |
| JPMorgan Chase & Co | 100,066 | $1.79M | 0.00% | −112,339−52.9% | Reduced |
| UBS Asset Management Americas Inc | 93,385 | $1.67M | 0.00% | +30,247+47.9% | Added |
| Two Sigma Advisers, LP | 89,700 | $1.60M | 0.00% | +13,800+18.2% | Added |
| Ameriprise Financial Inc | 88,900 | $1.59M | 0.00% | +9,600+12.1% | Added |
| International Assets Investment Management, LLC | 86,900 | $1.55M | 0.13% | +32,300+59.2% | Added |
| Colony Group, LLC | 85,353 | $1.52M | 0.00% | +330.0% | Added |
| Oppenheimer & Close, LLC | 82,999 | $1.48M | 1.14% | 00.0% | Unchanged |
| Barclays PLC | 81,902 | $1.46M | 0.00% | +22,570+38.0% | Added |
| Stilwell Value LLC | 80,000 | $1.43M | 0.70% | 00.0% | Unchanged |
| Swiss National Bank | 75,900 | $1.36M | 0.00% | −2,700−3.4% | Reduced |
| Cubist Systematic Strategies, LLC | 73,914 | $1.32M | 0.01% | +73,914 | New |
| Great Oak Capital Partners, LLC | 61,654 | $1.17M | 0.34% | −124,032−66.8% | Reduced |
| Susquehanna International Group, LLP | 62,493 | $1.12M | 0.00% | −9,044−12.6% | Reduced |
| Legal & General Group Plc | 62,014 | $1.11M | 0.00% | +2,237+3.7% | Added |
| American Century Companies Inc | 61,935 | $1.11M | 0.00% | +36,238+141.0% | Added |
| Rhumbline Advisers | 60,519 | $1.08M | 0.00% | +9,714+19.1% | Added |
| Lynch & Associates | 56,851 | $1.02M | 0.20% | −3,375−5.6% | Reduced |
| Farley Capital L.P. | 54,586 | $974.9K | 0.76% | 00.0% | Unchanged |
| XTX Topco Ltd | 52,620 | $939.8K | 0.04% | +52,620 | New |
| Trexquant Investment LP | 51,781 | $924.8K | 0.01% | +51,781 | New |
| SummerHaven Investment Management, LLC | 50,826 | $907.8K | 0.59% | +849+1.7% | Added |
| Integrated Wealth Concepts LLC | 49,740 | $888.4K | 0.01% | −2,630−5.0% | Reduced |
| Jacobs Levy Equity Management, Inc | 49,559 | $885.1K | 0.00% | +49,559 | New |
| AQR Capital Management LLC | 47,296 | $844.7K | 0.00% | +33,298+237.9% | Added |
| Invesco Ltd. | 42,744 | $763.4K | 0.00% | +13,112+44.2% | Added |
| Alliancebernstein L.P. | 40,730 | $727.4K | 0.00% | −122,520−75.1% | Reduced |
| Principal Financial Group Inc | 40,267 | $719.2K | 0.00% | +40,267 | New |
| Los Angeles Capital Management LLC | 38,457 | $686.8K | 0.00% | +38,457 | New |
| Citigroup Inc | 37,301 | $666.2K | 0.00% | −8,691−18.9% | Reduced |
| Aviance Capital Partners, LLC | 37,167 | $663.8K | 0.09% | +1,434+4.0% | Added |
| BNP Paribas Arbitrage, SA | 36,539 | $652.6K | 0.00% | −13,646−27.2% | Reduced |
| Rafferty Asset Management, LLC | 35,629 | $636.3K | 0.00% | +2,720+8.3% | Added |
| California State Teachers Retirement System | 35,234 | $629.3K | 0.00% | −691−1.9% | Reduced |
| Raffles Associates LP | 31,136 | $556.1K | 0.58% | +20,000+179.6% | Added |
| Y-Intercept (Hong Kong) Ltd | 28,795 | $514.3K | 0.01% | +28,795 | New |
| Jane Street Group, LLC | 26,684 | $476.6K | 0.00% | −27,929−51.1% | Reduced |
| First Trust Advisors LP | 26,304 | $469.8K | 0.00% | +498+1.9% | Added |
| Susquehanna Portfolio Strategies, LLC | 24,173 | $431.7K | 0.01% | +24,173 | New |
| Occudo Quantitative Strategies LP | 23,845 | $425.9K | 0.05% | +23,845 | New |
| MetLife Investment Management | 23,755 | $424.3K | 0.00% | 00.0% | Unchanged |
| Wells Fargo & Company | 22,474 | $401.4K | 0.00% | −895−3.8% | Reduced |
| Modera Wealth Management, LLC | 22,011 | $393.1K | 0.00% | 00.0% | Unchanged |
| LPL Financial LLC | 21,516 | $384.3K | 0.00% | −984−4.4% | Reduced |
| Investment Advisory Group, LLC | 20,000 | $357.2K | 0.11% | 00.0% | Unchanged |
| Wiley Bros.-Aintree Capital, LLC | 19,810 | $353.8K | 0.00% | +19,810 | New |
| Kestra Private Wealth Services, LLC | 19,627 | $350.5K | 0.01% | 00.0% | Unchanged |
| Mirae Asset Global ETFs Holdings Ltd. | 19,185 | $342.6K | 0.00% | −3,942−17.0% | Reduced |
| Creative Planning | 19,108 | $341.3K | 0.00% | −9,982−34.3% | Reduced |
| SEI Investments Co | 19,103 | $341.2K | 0.00% | 00.0% | Unchanged |
| Citadel Advisors LLC | 18,895 | $337.5K | 0.00% | +18,895 | New |
| Royal Bank of Canada | 18,158 | $324.0K | 0.00% | +3,232+21.7% | Added |
| D. E. Shaw & Co., Inc. | 18,116 | $323.6K | 0.00% | +1,595+9.7% | Added |
| Price T Rowe Associates Inc | 17,653 | $316.0K | 0.00% | +561+3.3% | Added |
| Susquehanna Fundamental Investments, LLC | 16,957 | $302.9K | 0.01% | −29,489−63.5% | Reduced |
| State of Wyoming | 16,365 | $292.3K | 0.04% | +4,583+38.9% | Added |
| Northeast Investment Management | 16,000 | $285.8K | 0.01% | +4,000+33.3% | Added |
| Intech Investment Management LLC | 15,980 | $285.4K | 0.00% | −3,689−18.8% | Reduced |
| Janus Henderson Group PLC | 14,800 | $264.6K | 0.00% | −17,836−54.7% | Reduced |
| SG Americas Securities, LLC | 14,525 | $259.0K | 0.00% | −7,346−33.6% | Reduced |
| Commonwealth Equity Services, LLC | 13,924 | $249.0K | 0.00% | +127+0.9% | Added |
| Martingale Asset Management L P | 13,400 | $239.3K | 0.01% | −2,100−13.5% | Reduced |
| PDT Partners, LLC | 12,803 | $228.7K | 0.01% | −24,483−65.7% | Reduced |
| Manufacturers Life Insurance Company, The | 12,498 | $223.2K | 0.00% | −974−7.2% | Reduced |
| Farther Finance Advisors, LLC | 12,000 | $214.3K | 0.00% | 00.0% | Unchanged |
| Flagship Harbor Advisors, LLC | 11,914 | $212.8K | 0.01% | +11,914 | New |
| Voya Investment Management LLC | 11,769 | $210.2K | 0.00% | +168+1.4% | Added |
| Arizona State Retirement System | 11,601 | $207.2K | 0.00% | −36−0.3% | Reduced |
| Public Employees Retirement System of Ohio | 10,788 | $192.7K | 0.00% | +10,788 | New |
| Gray Private Wealth, LLC | 10,588 | $189.1K | 0.10% | 00.0% | Unchanged |
| New York State Common Retirement Fund | 10,000 | $178.6K | 0.00% | 00.0% | Unchanged |
| Barrett & Company, Inc. | 10,000 | $178.6K | 0.07% | 00.0% | Unchanged |