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 |
|---|---|---|---|---|---|
| Two Sigma Advisers, LP | 89,700 | $1.60M | 0.00% | +13,800+18.2% | Added |
| UBS Asset Management Americas Inc | 93,385 | $1.67M | 0.00% | +30,247+47.9% | Added |
| JPMorgan Chase & Co | 100,066 | $1.79M | 0.00% | −112,339−52.9% | Reduced |
| Qube Research & Technologies Ltd | 100,672 | $1.80M | 0.00% | +21,072+26.5% | Added |
| Bank of New York Mellon Corp | 103,536 | $1.85M | 0.00% | +1,909+1.9% | Added |
| Mangrove Partners | 103,743 | $1.85M | 0.20% | 00.0% | Unchanged |
| UBS Group AG | 103,842 | $1.85M | 0.00% | +45,948+79.4% | Added |
| Nuveen, LLC | 108,744 | $1.94M | 0.00% | −23,514−17.8% | Reduced |
| Victory Capital Management Inc | 112,109 | $2.00M | 0.00% | −4,090−3.5% | Reduced |
| Financial Engines Advisors L.L.C. | 118,299 | $2.11M | 0.00% | +118,299 | New |
| Bank of America Corp | 129,952 | $2.32M | 0.00% | −173,768−57.2% | Reduced |
| Morgan Stanley | 134,337 | $2.40M | 0.00% | −117,307−46.6% | Reduced |
| Two Sigma Investments, LP | 141,234 | $2.52M | 0.00% | −9,163−6.1% | Reduced |
| Renaissance Technologies LLC | 144,148 | $2.57M | 0.00% | −58,052−28.7% | Reduced |
| Prospector Partners LLC | 167,622 | $2.99M | 0.35% | −74,650−30.8% | Reduced |
| EJF Capital LLC | 167,830 | $3.00M | 2.39% | +97,867+139.9% | Added |
| Deutsche Bank AG | 178,054 | $3.18M | 0.00% | −2,761−1.5% | Reduced |
| Hennessy Advisors Inc | 180,000 | $3.21M | 0.11% | −15,000−7.7% | Reduced |
| Panagora Asset Management Inc | 225,581 | $4.03M | 0.02% | +44,299+24.4% | Added |
| Charles Schwab Investment Management Inc | 298,987 | $5.34M | 0.00% | −12,449−4.0% | Reduced |
| FMR LLC | 301,277 | $5.38M | 0.00% | +6,699+2.3% | Added |
| Marshall Wace, LLP | 315,460 | $5.63M | 0.01% | +196,837+165.9% | Added |
| Northern Trust Corp | 316,761 | $5.66M | 0.00% | −31,055−8.9% | Reduced |
| Goldman Sachs Group Inc | 474,756 | $8.48M | 0.00% | +3,333+0.7% | Added |
| Hotchkis & Wiley Capital Management LLC | 546,510 | $9.76M | 0.03% | +19,700+3.7% | Added |
| Millennium Management LLC | 643,071 | $11.5M | 0.01% | +389,528+153.6% | Added |
| Geode Capital Management, LLC | 883,141 | $15.8M | 0.00% | −18,523−2.1% | Reduced |
| State Street Corp | 1,120,663 | $20.0M | 0.00% | +40,561+3.8% | Added |
| Wellington Management Group LLP | 1,860,589 | $33.2M | 0.01% | +250,000+15.5% | Added |
| Vanguard Group Inc | 1,981,996 | $35.4M | 0.00% | −126,761−6.0% | Reduced |
| Pertento Partners LLP | 2,114,336 | $37.8M | 4.26% | +135,433+6.8% | Added |
| BlackRock, Inc. | 2,881,357 | $51.5M | 0.00% | −259,490−8.3% | Reduced |
| Endeavour Capital Advisors Inc | 0 | $0 | 0.00% | −164,179−100.0% | Sold out |
| Piper Sandler & Co. | 0 | $0 | 0.00% | −40,000−100.0% | Sold out |
| Corebridge Financial, Inc. | 0 | $0 | 0.00% | −19,074−100.0% | Sold out |
| Engineers Gate Manager LP | 0 | $0 | 0.00% | −18,960−100.0% | Sold out |
| Centiva Capital, LP | 0 | $0 | 0.00% | −11,514−100.0% | Sold out |
| Coldstream Capital Management Inc | 0 | $0 | 0.00% | −82−100.0% | Sold out |
| Signaturefd, LLC | 0 | $0 | 0.00% | −34−100.0% | Sold out |
| Quadrant Capital Group LLC | 0 | $0 | 0.00% | −27−100.0% | Sold out |
| Parkside Financial Bank & Trust | 0 | $0 | 0.00% | −25−100.0% | Sold out |
| Stephens Consulting, LLC | 0 | $0 | 0.00% | −20−100.0% | Sold out |
| US Bancorp | 0 | $0 | 0.00% | −13−100.0% | Sold out |
| Lindbrook Capital, LLC | – | – | – | – | Not filed |