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 |
|---|---|---|---|
| 10-Q | Quarterly report | Nov 4, 2026 | Sep 30, 2026 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure, Other events
|
Oct 15, 2026 | Oct 15, 2026 |
| 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 |
| 10-Q | Quarterly report | Aug 7, 2026 | Jun 30, 2026 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure, Other events
|
Jul 22, 2026 | Jul 22, 2026 |
| 11-K | Employee savings plan report | Jun 25, 2026 | Dec 31, 2025 |
| 8-K |
Current report
Other events
|
May 21, 2026 | May 21, 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 |
| 8-K |
Current report
Other events
|
May 13, 2026 | May 12, 2026 |
| 10-Q | Quarterly report | May 8, 2026 | Mar 31, 2026 |
| 8-K |
Current report
Shareholder vote results
|
Apr 29, 2026 | Apr 29, 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 |
| 8-K |
Current report
Results of operations, Officer or director change, Other events
|
Apr 22, 2026 | Apr 22, 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 | — |
| DEF 14A | Proxy statement | Mar 27, 2026 | Apr 29, 2026 |
| ARS | Annual report to shareholders | Mar 27, 2026 | Dec 31, 2025 |
| 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 |
| 10-K | Annual report | Mar 3, 2026 | Dec 31, 2025 |
| 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 | — |
| S-8 POS | Filing | Feb 9, 2026 | — |
| 8-K |
Current report
Other events
|
Feb 4, 2026 | Feb 4, 2026 |
| SCHEDULE 13G | Ownership over 5% (passive) | Jan 30, 2026 | — |
| 4 | Insider transaction | Jan 30, 2026 | Jan 24, 2025 |
| 8-K |
Current report
Results of operations, Other events
|
Jan 22, 2026 | Jan 22, 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 | 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 |
| 8-K |
Current report
Acquisition or sale of assets, Officer or director change, Regulation FD disclosure
|
Nov 17, 2025 | Nov 15, 2025 |
| S-8 | Employee stock plan registration | Nov 14, 2025 | — |
| 8-K |
Current report
Other events
|
Nov 14, 2025 | Nov 14, 2025 |
| 425 | Filing | Nov 13, 2025 | — |
| 8-K/A |
Amended current report
Regulation FD disclosure, Other events
|
Nov 13, 2025 | Nov 13, 2025 |
| 425 | Filing | Nov 13, 2025 | — |
| 8-K |
Current report
Regulation FD disclosure, Other events
|
Nov 13, 2025 | Nov 13, 2025 |
| 4 | Insider transaction | Nov 12, 2025 | Nov 10, 2025 |
| 10-Q | Quarterly report | Nov 7, 2025 | Sep 30, 2025 |
| 8-K |
Current report
Other events
|
Nov 4, 2025 | Nov 4, 2025 |
| 4 | Insider transaction | Nov 3, 2025 | Oct 30, 2025 |
| 425 | Filing | Oct 31, 2025 | — |
| 8-K |
Current report
Other events
|
Oct 31, 2025 | Oct 31, 2025 |
| 4 | Insider transaction | Oct 29, 2025 | Oct 28, 2025 |
| 8-K/A |
Amended current report
Results of operations, Other events
|
Oct 23, 2025 | Oct 22, 2025 |
| 8-K |
Current report
Results of operations, Other events
|
Oct 22, 2025 | Oct 22, 2025 |
| 8-K |
Current report
Other events
|
Oct 20, 2025 | Oct 20, 2025 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Oct 17, 2025 | — |
| 8-K |
Current report
Other events
|
Oct 8, 2025 | Oct 7, 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 |
| 10-Q | Quarterly report | Aug 8, 2025 | Jun 30, 2025 |
| EFFECT | Filing | Jul 30, 2025 | — |
| 424B3 | Prospectus | Jul 30, 2025 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Jul 29, 2025 | — |
| 8-K |
Current report
Other events
|
Jul 29, 2025 | Jul 29, 2025 |
| CORRESP | Letter to the SEC | Jul 28, 2025 | — |
| S-4/A | Filing | Jul 28, 2025 | — |
| 4 | Insider transaction | Jul 25, 2025 | Jul 25, 2025 |
| 8-K |
Current report
Results of operations, Other events
|
Jul 23, 2025 | Jul 23, 2025 |
| 3 | Initial insider ownership | Jul 23, 2025 | Jul 7, 2025 |
| 8-K |
Current report
Other events
|
Jul 16, 2025 | Jul 15, 2025 |
| UPLOAD | Letter from the SEC | Jul 10, 2025 | — |
| S-4 | Registration for a merger or exchange | Jul 2, 2025 | — |
| 11-K | Employee savings plan report | Jun 25, 2025 | Dec 31, 2024 |
| 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 |
| 425 | Filing | Jun 6, 2025 | — |
| 8-K/A |
Amended current report
Material agreement, Officer or director change, Regulation FD disclosure
|
Jun 5, 2025 | Jun 5, 2025 |
| 8-K |
Current report
Material agreement, Officer or director change, Regulation FD disclosure
|
Jun 5, 2025 | Jun 5, 2025 |
| 10-Q | Quarterly report | May 9, 2025 | Mar 31, 2025 |
| 8-K |
Current report
Other events
|
May 7, 2025 | May 7, 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 |
| S-8 | Employee stock plan registration | Apr 24, 2025 | — |
| 8-K |
Current report
Shareholder vote results
|
Apr 24, 2025 | Apr 23, 2025 |
| 8-K |
Current report
Results of operations
|
Apr 22, 2025 | Apr 22, 2025 |
| 8-K |
Current report
Other events
|
Mar 31, 2025 | Mar 28, 2025 |
| 4 | Insider transaction | Mar 18, 2025 | Mar 18, 2025 |
| DEF 14A | Proxy statement | Mar 14, 2025 | Apr 23, 2025 |
| 4 | Insider transaction | Mar 13, 2025 | Mar 11, 2025 |
| ARS | Annual report to shareholders | Mar 11, 2025 | Dec 31, 2024 |
| 10-K | Annual report | Mar 7, 2025 | Dec 31, 2024 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Feb 12, 2025 | — |
| 3 | Initial insider ownership | Feb 3, 2025 | Jan 22, 2025 |
| 8-K |
Current report
Officer or director change
|
Jan 31, 2025 | Jan 28, 2025 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Jan 30, 2025 | — |
| 8-K |
Current report
Other events
|
Jan 29, 2025 | Jan 29, 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 |
| 8-K |
Current report
Results of operations, Other events
|
Jan 22, 2025 | Jan 22, 2025 |
| 8-K |
Current report
Officer or director change
|
Jan 6, 2025 | Jan 3, 2025 |
| 4 | Insider transaction | Nov 19, 2024 | Nov 19, 2024 |
| SC 13G | Ownership over 5% (passive) | Nov 14, 2024 | — |
| 8-K |
Current report
Other events
|
Nov 14, 2024 | Nov 14, 2024 |
| SC 13G/A | Amended ownership over 5% (passive) | Nov 12, 2024 | — |
| SC 13G | Ownership over 5% (passive) | Nov 8, 2024 | — |
| 10-Q | Quarterly report | Nov 8, 2024 | Sep 30, 2024 |
| SC 13G/A | Amended ownership over 5% (passive) | Nov 4, 2024 | — |
| 8-K |
Current report
Results of operations
|
Oct 30, 2024 | Oct 30, 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 |
| 8-K |
Current report
Officer or director change
|
Sep 12, 2024 | Sep 12, 2024 |
| 4 | Insider transaction | Aug 27, 2024 | Aug 26, 2024 |
| 10-Q | Quarterly report | Aug 9, 2024 | Jun 30, 2024 |
| 4 | Insider transaction | Aug 6, 2024 | Aug 2, 2024 |
| 4 | Insider transaction | Aug 2, 2024 | Aug 2, 2024 |
| 8-K |
Current report
Other events
|
Jul 30, 2024 | Jul 30, 2024 |
| 8-K |
Current report
Results of operations, Officer or director change
|
Jul 24, 2024 | Jul 24, 2024 |
| 11-K | Employee savings plan report | Jun 27, 2024 | Dec 31, 2023 |
| 8-K |
Current report
Regulation FD disclosure
|
Jun 4, 2024 | Jun 4, 2024 |
| 8-K |
Current report
Shareholder vote results
|
May 23, 2024 | May 22, 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 |
| 10-Q | Quarterly report | May 10, 2024 | Mar 31, 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 |
| 8-K |
Current report
Results of operations
|
Apr 24, 2024 | Apr 24, 2024 |
| ARS | Annual report to shareholders | Apr 12, 2024 | Dec 31, 2023 |
| DEFA14A | Additional proxy material | Apr 12, 2024 | — |
| DEF 14A | Proxy statement | Apr 12, 2024 | May 22, 2024 |
| 10-K | Annual report | Mar 28, 2024 | Dec 31, 2023 |
| 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 |
| 8-K |
Current report
Results of operations
|
Feb 29, 2024 | Feb 28, 2024 |
| 3 | Initial insider ownership | Feb 8, 2024 | Feb 1, 2024 |
| 8-K |
Current report
Officer or director change
|
Feb 6, 2024 | Feb 1, 2024 |
| 4 | Insider transaction | Jan 17, 2024 | Jan 11, 2024 |
| 4 | Insider transaction | Jan 12, 2024 | Jan 11, 2024 |
Showing 200 filings, the most recent 200. 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
Other Savings Institutions, Not Federally Chartered companies
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- Third Coast Bancshares, Inc. TCBX
- Greene County Bancorp Inc GCBC
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- Pioneer Bancorp, Inc./MD PBFS
All 40 Savings Institutions, Not Federally Chartered companies
Source: SEC EDGAR filings. This is company-reported data, not investment advice.