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.
Key figures
- Insider buysLast 90 days, $47.9K in total
- 2
- Insider sellsLast 90 days, $45.9K in total
- 1
- 13F holdersQ2 2026, −13 vs. previous quarter
- 161
- 13F valueReported value at the end of Q2 2026
- $474.9M
- Superinvestors holdingAt the end of Q2 2026
- 0
Price chart
Superinvestors holding NBBK, Q2 2026
No superinvestor reported holding NBBK at the end of Q2 2026.
Latest insider trades
Open-market purchases and sales by NB Bancorp, Inc. insiders from Form 4, newest first.
| Filed (ET) | Trade date | Filing delay | Insider | Transaction | Shares | Avg price | Value | Holding change | Flags |
|---|---|---|---|---|---|---|---|---|---|
| Aug 21, 2026 (view filing)4:57 PM ET | Aug 20 | 1 day | Campanelli Joseph PPresident & CEO | PPurchase | +2.00K | $21.75 | +$43.5K | +0.5%379.8K after | |
| Aug 21, 2026 (view filing)4:05 PM ET | Aug 20 | 1 day | Lapointe Jean-PierreSEVP and CFO | PPurchase | +200 | $21.80 | +$4.36K | +0.2%110.5K after | |
| Aug 18, 2026 (view filing)4:05 PM ET | Aug 14 | 4 days | Henkin KevinEVP, Chief Credit Officer | SSale | −2.00K | $22.93 | −$45.9K | −22.5%6.87K after | |
| May 18, 2026 (view filing) | May 15 | 3 days | Campanelli Joseph PPresident & CEO | PPurchase | +3.00K | $19.18 | +$57.5K | +0.8%377.8K after | 9 lots |
| Apr 27, 2026 (view filing) | Apr 24 | 3 days | Campanelli Joseph PPresident & CEO | PPurchase | +2.50K | $19.45 | +$48.6K | +0.7%374.8K after | 7 lots |
| Apr 24, 2026 (view filing) | Apr 24 | Same day | Pascucci HopeDirector | PPurchase | +20.0K | $19.47 | +$389.3K | +16.3%142.4K after | 2 lots |
| Mar 20, 2026 (view filing) | Mar 6 | 14 days | Campanelli Joseph PPresident & CEO | PPurchase | +5.00K | $20.77 | +$103.9K | New position3.00K after | Amended2 lots |
| Mar 19, 2026 (view filing) | Mar 19 | Same day | Campanelli Joseph PPresident & CEO | PPurchase | +2.50K | $20.16 | +$50.4K | +0.6%396.7K after | |
| Mar 9, 2026 (view filing) | Mar 9 | Same day | Lapointe Jean-PierreSEVP and CFO | PPurchase | +1.00K | $20.42 | +$20.4K | +0.9%110.3K after | |
| Jan 30, 2026 (view filing) | Jan 24, 2025 | 371 daysLate | Elliott Mary SusanDirector | PPurchase | +10.0K | $18.72 | +$187.2K | +9.5%115.8K after |
Top 10 13F holders, Q2 2026
The largest institutional positions in NB Bancorp, Inc. at the end of Q2 2026; share changes are against Q1 2026.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| BlackRock, Inc. | 3,331,544 | $70.4M | 0.00% | +247,322+8.0% | Added |
| Vanguard Capital Management LLC | 1,670,835 | $35.3M | 0.00% | −33,093−1.9% | Reduced |
| AltraVue Capital, LLC | 1,655,108 | $35.0M | 2.52% | +351,028+26.9% | Added |
| Pertento Partners LLP | 1,475,770 | $31.2M | 2.24% | −730,896−33.1% | Reduced |
| State Street Corp | 1,471,766 | $31.1M | 0.00% | +178,228+13.8% | Added |
| Geode Capital Management, LLC | 1,153,217 | $24.4M | 0.00% | +54,287+4.9% | Added |
| Dimensional Fund Advisors LP | 753,320 | $15.9M | 0.00% | +230,936+44.2% | Added |
| Goldman Sachs Group Inc | 571,954 | $12.1M | 0.00% | −119,714−17.3% | Reduced |
| Tieton Capital Management, LLC | 546,600 | $11.6M | 3.32% | −6,970−1.3% | Reduced |
| Hotchkis & Wiley Capital Management LLC | 501,172 | $10.6M | 0.03% | +50,400+11.2% | Added |