NB Bancorp, Inc. SEC filings NBBK
NB Bancorp, Inc. has 250 filings in SEC EDGAR's recent list, going back to Jun 9, 2023. Its latest annual report, Form ARS, was filed on Mar 27, 2026 for the period ended Dec 31, 2025. The latest quarterly report (Form 10-Q) was filed on Nov 4, 2026, covering the quarter ended Sep 30, 2026. The most recent current report (Form 8-K) was filed on Oct 15, 2026 (results of operations, regulation fd disclosure, other events). The company's fiscal year ends on December 31.
| Form | Description | Filed | Period |
|---|---|---|---|
| 4 | Insider transaction | Aug 21, 2026 | Aug 20, 2026 |
| 4 | Insider transaction | Aug 21, 2026 | Aug 20, 2026 |
| 4 | Insider transaction | Aug 18, 2026 | Aug 14, 2026 |
| 4 | Insider transaction | May 18, 2026 | May 15, 2026 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | May 15, 2026 | — |
| 4/A | Form 4/a | May 15, 2026 | Apr 24, 2026 |
| 4/A | Form 4/a | May 15, 2026 | Apr 24, 2026 |
| 4/A | Form 4/a | May 15, 2026 | Apr 24, 2026 |
| 4/A | Form 4/a | May 15, 2026 | Apr 24, 2026 |
| 4/A | Form 4/a | May 15, 2026 | Apr 24, 2026 |
| 4/A | Form 4/a | May 15, 2026 | Apr 24, 2026 |
| 4 | Insider transaction | Apr 27, 2026 | Apr 24, 2026 |
| 4 | Insider transaction | Apr 27, 2026 | Apr 24, 2026 |
| 4 | Insider transaction | Apr 27, 2026 | Apr 24, 2026 |
| 4 | Insider transaction | Apr 27, 2026 | Apr 24, 2026 |
| 4 | Insider transaction | Apr 27, 2026 | Apr 24, 2026 |
| 4 | Insider transaction | Apr 27, 2026 | Apr 24, 2026 |
| 4 | Insider transaction | Apr 27, 2026 | Apr 24, 2026 |
| 4 | Insider transaction | Apr 27, 2026 | Apr 24, 2026 |
| 4 | Insider transaction | Apr 24, 2026 | Apr 24, 2026 |
| 4 | Insider transaction | Mar 30, 2026 | Mar 9, 2026 |
| 3 | Initial insider ownership | Mar 30, 2026 | Mar 2, 2026 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Mar 27, 2026 | — |
| 4/A | Form 4/a | Mar 20, 2026 | Mar 6, 2026 |
| 4 | Insider transaction | Mar 19, 2026 | Mar 19, 2026 |
| 4 | Insider transaction | Mar 9, 2026 | Mar 6, 2026 |
| 4 | Insider transaction | Mar 9, 2026 | Mar 9, 2026 |
| 4 | Insider transaction | Feb 27, 2026 | Feb 25, 2026 |
| 4 | Insider transaction | Feb 27, 2026 | Feb 25, 2026 |
| 4 | Insider transaction | Feb 27, 2026 | Feb 25, 2026 |
| 4 | Insider transaction | Feb 27, 2026 | Feb 25, 2026 |
| 4 | Insider transaction | Feb 27, 2026 | Feb 25, 2026 |
| 4 | Insider transaction | Feb 27, 2026 | Feb 25, 2026 |
| 4 | Insider transaction | Feb 27, 2026 | Feb 25, 2026 |
| 4 | Insider transaction | Feb 27, 2026 | Feb 25, 2026 |
| 4 | Insider transaction | Feb 27, 2026 | Feb 25, 2026 |
| SCHEDULE 13G | Ownership over 5% (passive) | Feb 13, 2026 | — |
| SCHEDULE 13G | Ownership over 5% (passive) | Jan 30, 2026 | — |
| 4 | Insider transaction | Jan 30, 2026 | Jan 24, 2025 |
| 4 | Insider transaction | Jan 6, 2026 | Jan 2, 2026 |
| 4 | Insider transaction | Jan 6, 2026 | Jan 2, 2026 |
| 4 | Insider transaction | Jan 6, 2026 | Jan 2, 2026 |
| 4 | Insider transaction | Jan 6, 2026 | Jan 2, 2026 |
| 4 | Insider transaction | Jan 6, 2026 | Jan 2, 2026 |
| 4 | Insider transaction | Jan 6, 2026 | Jan 2, 2026 |
| 4 | Insider transaction | Jan 6, 2026 | Jan 2, 2026 |
| 4 | Insider transaction | Jan 6, 2026 | Jan 2, 2026 |
| 4 | Insider transaction | Jan 6, 2026 | Jan 2, 2026 |
| 4 | Insider transaction | Jan 6, 2026 | Jan 2, 2026 |
| 4 | Insider transaction | Jan 6, 2026 | Jan 2, 2026 |
| 4 | Insider transaction | Jan 6, 2026 | Jan 2, 2026 |
| 4 | Insider transaction | Dec 19, 2025 | Dec 19, 2025 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Dec 5, 2025 | — |
| 3 | Initial insider ownership | Nov 25, 2025 | Nov 15, 2025 |
| 4 | Insider transaction | Nov 12, 2025 | Nov 10, 2025 |
| 4 | Insider transaction | Nov 3, 2025 | Oct 30, 2025 |
| 4 | Insider transaction | Oct 29, 2025 | Oct 28, 2025 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Oct 17, 2025 | — |
| 4 | Insider transaction | Sep 18, 2025 | Sep 16, 2025 |
| 4 | Insider transaction | Sep 15, 2025 | Sep 12, 2025 |
| 4 | Insider transaction | Sep 12, 2025 | Sep 10, 2025 |
| 4 | Insider transaction | Sep 11, 2025 | Sep 9, 2025 |
| 4 | Insider transaction | Aug 12, 2025 | Aug 11, 2025 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Jul 29, 2025 | — |
| 4 | Insider transaction | Jul 25, 2025 | Jul 25, 2025 |
| 3 | Initial insider ownership | Jul 23, 2025 | Jul 7, 2025 |
| 4 | Insider transaction | Jun 18, 2025 | Jun 10, 2025 |
| SCHEDULE 13G | Ownership over 5% (passive) | Jun 11, 2025 | — |
| 4 | Insider transaction | Jun 10, 2025 | Jun 9, 2025 |
| 4 | Insider transaction | Jun 10, 2025 | Jun 9, 2025 |
| SCHEDULE 13G | Ownership over 5% (passive) | Apr 30, 2025 | — |
| 4 | Insider transaction | Apr 29, 2025 | Apr 29, 2025 |
| 4 | Insider transaction | Apr 28, 2025 | Apr 24, 2025 |
| 4 | Insider transaction | Apr 28, 2025 | Apr 24, 2025 |
| 4 | Insider transaction | Apr 28, 2025 | Apr 24, 2025 |
| 4 | Insider transaction | Apr 28, 2025 | Apr 24, 2025 |
| 4 | Insider transaction | Apr 28, 2025 | Apr 24, 2025 |
| 4 | Insider transaction | Apr 28, 2025 | Apr 24, 2025 |
| 4 | Insider transaction | Apr 28, 2025 | Apr 24, 2025 |
| 4 | Insider transaction | Apr 28, 2025 | Apr 24, 2025 |
| 4 | Insider transaction | Apr 28, 2025 | Apr 24, 2025 |
| 4 | Insider transaction | Apr 28, 2025 | Apr 24, 2025 |
| 4 | Insider transaction | Apr 28, 2025 | Apr 24, 2025 |
| 4 | Insider transaction | Apr 28, 2025 | Apr 24, 2025 |
| 4 | Insider transaction | Apr 28, 2025 | Apr 24, 2025 |
| 4 | Insider transaction | Apr 28, 2025 | Apr 24, 2025 |
| 4 | Insider transaction | Mar 18, 2025 | Mar 18, 2025 |
| 4 | Insider transaction | Mar 13, 2025 | Mar 11, 2025 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Feb 12, 2025 | — |
| 3 | Initial insider ownership | Feb 3, 2025 | Jan 22, 2025 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Jan 30, 2025 | — |
| 4 | Insider transaction | Jan 27, 2025 | Jan 24, 2025 |
| 4 | Insider transaction | Jan 24, 2025 | Jan 24, 2025 |
| 3 | Initial insider ownership | Jan 22, 2025 | Jan 6, 2025 |
| 4 | Insider transaction | Nov 19, 2024 | Nov 19, 2024 |
| SC 13G | Ownership over 5% (passive) | Nov 14, 2024 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Nov 12, 2024 | — |
| SC 13G | Ownership over 5% (passive) | Nov 8, 2024 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Nov 4, 2024 | — |
| SC 13G | Ownership over 5% (passive) | Oct 22, 2024 | — |
| 4 | Insider transaction | Sep 20, 2024 | Sep 19, 2024 |
| 4 | Insider transaction | Sep 20, 2024 | Sep 19, 2024 |
| 3 | Initial insider ownership | Sep 16, 2024 | Sep 12, 2024 |
| 4 | Insider transaction | Aug 27, 2024 | Aug 26, 2024 |
| 4 | Insider transaction | Aug 6, 2024 | Aug 2, 2024 |
| 4 | Insider transaction | Aug 2, 2024 | Aug 2, 2024 |
| SC 13G | Ownership over 5% (passive) | May 21, 2024 | — |
| 4 | Insider transaction | May 21, 2024 | May 15, 2024 |
| 4 | Insider transaction | May 16, 2024 | May 16, 2024 |
| 4 | Insider transaction | May 9, 2024 | May 8, 2024 |
| 4 | Insider transaction | May 1, 2024 | Apr 29, 2024 |
| 4 | Insider transaction | Apr 30, 2024 | Apr 26, 2024 |
| 4 | Insider transaction | Mar 22, 2024 | Mar 11, 2024 |
| 4 | Insider transaction | Mar 19, 2024 | Mar 19, 2024 |
| 4 | Insider transaction | Mar 12, 2024 | Mar 6, 2024 |
| 4/A | Form 4/a | Mar 11, 2024 | Mar 8, 2024 |
| 4 | Insider transaction | Mar 11, 2024 | Mar 8, 2024 |
| 4 | Insider transaction | Mar 6, 2024 | Mar 5, 2024 |
| 4 | Insider transaction | Mar 5, 2024 | Mar 4, 2024 |
| 4 | Insider transaction | Mar 5, 2024 | Mar 4, 2024 |
| 4 | Insider transaction | Mar 5, 2024 | Mar 1, 2024 |
| 3 | Initial insider ownership | Feb 8, 2024 | Feb 1, 2024 |
| 4 | Insider transaction | Jan 17, 2024 | Jan 11, 2024 |
| 4 | Insider transaction | Jan 12, 2024 | Jan 11, 2024 |
| 4 | Insider transaction | Jan 10, 2024 | Jan 8, 2024 |
| 4 | Insider transaction | Jan 8, 2024 | Jan 5, 2024 |
| 4 | Insider transaction | Jan 5, 2024 | Jan 4, 2024 |
| 4 | Insider transaction | Jan 3, 2024 | Jan 2, 2024 |
| 4 | Insider transaction | Jan 2, 2024 | Dec 28, 2023 |
| 4 | Insider transaction | Jan 2, 2024 | Dec 28, 2023 |
| 4 | Insider transaction | Dec 29, 2023 | Dec 28, 2023 |
| 3 | Initial insider ownership | Dec 27, 2023 | Dec 27, 2023 |
| 3 | Initial insider ownership | Dec 27, 2023 | Dec 27, 2023 |
| 3 | Initial insider ownership | Dec 27, 2023 | Dec 27, 2023 |
| 3 | Initial insider ownership | Dec 27, 2023 | Dec 27, 2023 |
| 3 | Initial insider ownership | Dec 27, 2023 | Dec 27, 2023 |
| 3 | Initial insider ownership | Dec 27, 2023 | Dec 27, 2023 |
| 3 | Initial insider ownership | Dec 27, 2023 | Dec 27, 2023 |
| 3 | Initial insider ownership | Dec 27, 2023 | Dec 27, 2023 |
| 3 | Initial insider ownership | Dec 27, 2023 | Dec 27, 2023 |
| 3 | Initial insider ownership | Dec 27, 2023 | Dec 27, 2023 |
| 3 | Initial insider ownership | Dec 27, 2023 | Dec 27, 2023 |
| 3 | Initial insider ownership | Dec 27, 2023 | Dec 27, 2023 |
| 3 | Initial insider ownership | Dec 27, 2023 | Dec 27, 2023 |
| 3 | Initial insider ownership | Dec 27, 2023 | Dec 27, 2023 |
| 3 | Initial insider ownership | Dec 27, 2023 | Dec 27, 2023 |
| 3 | Initial insider ownership | Dec 27, 2023 | Dec 27, 2023 |
| 3 | Initial insider ownership | Dec 27, 2023 | Dec 27, 2023 |
| 3 | Initial insider ownership | Dec 27, 2023 | Dec 27, 2023 |
| 3 | Initial insider ownership | Dec 27, 2023 | Dec 27, 2023 |
| 3 | Initial insider ownership | Dec 27, 2023 | Dec 27, 2023 |
Showing 151 filings. Main filings leave out insider and ownership forms such as Form 4; choose a type above to see them. Each form opens on SEC.gov. Older filings are on SEC EDGAR.
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Company profile
- Industry
- Savings Institutions, Not Federally Chartered (SIC 6036)
- Listed as
- NBBK (Nasdaq)
- Fiscal year ends
- December 31
- Headquarters
- Needham, MA
- SEC filer status
- Accelerated filer, Emerging growth company
- SEC CIK
- 1979330
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All 40 Savings Institutions, Not Federally Chartered companies
Source: SEC EDGAR filings. This is company-reported data, not investment advice.