As of November 6, 2026, NB Bancorp, Inc. is a publicly traded company (Nasdaq: NBBK); its largest reported holder is Needham Bank Employee Stock Ownership Plan Trust, with 7.5% on Schedule 13G of February 13, 2026, then BlackRock (6.7%) (Schedule 13G, February 13, 2026).
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Is NB Bancorp, Inc. a real, registered company?
- NB Bancorp, Inc. files with the SEC under CIK 1979330 (its SEC filings).
- Its shares are listed under the ticker NBBK on Nasdaq (SEC company record).
- business address in Needham, Massachusetts, as its SEC filings state.
- Court and bankruptcy records: see Before you sign or pay below.
Before you sign or pay
- Court and bankruptcy: No federal court case or bankruptcy filing found under NB Bancorp, Inc. in our court records and SEC 8-K records (as of 2026-11-06).
- Ownership: 5%+ holders are reported on Schedule 13D or 13G; the latest names Needham Bank Employee Stock Ownership Plan Trust (filed 2026-02-13).
Who are NB Bancorp, Inc.'s owners and officers?
NB Bancorp, Inc.: business address in Needham, Massachusetts; industry Savings Institutions, Not Federally Chartered (Schedule 13G/A, 2026-05-15).
| Report | Holder | Share |
|---|---|---|
| Schedule 13G/A, 2026-05-15 | Pertento Partners LLP | 4.6% |
| Schedule 13G/A, 2026-03-27 | The Vanguard Group | 0% |
| Schedule 13G, 2026-02-13 | Needham Bank Employee Stock Ownership Plan Trust | 7.5% |
| Schedule 13G, 2026-01-30 | The Vanguard Group | 5.02% |
| Schedule 13G/A, 2025-12-05 | Pertento Partners LLP | 5.1% |
| Schedule 13G/A, 2025-10-17 | Blackrock, Inc. | 6.7% |
| Schedule 13G/A, 2025-07-29 | The Vanguard Group | 4.88% |
Questions about who owns NB Bancorp, Inc.
Who owns NB Bancorp, Inc.?
On this page, 2 holders' latest ownership filings report 5% or more of NB Bancorp, Inc.: Needham Bank Employee Stock Ownership Plan Trust (7.5%, Schedule 13G, filed 2026-02-13) and Blackrock, Inc. (6.7%, Schedule 13G/A, filed 2025-10-17).
Who are the largest shareholders of NB Bancorp, Inc.?
By the share each holder's latest filing reports, the largest holders of NB Bancorp, Inc. on this page are Needham Bank Employee Stock Ownership Plan Trust (7.5%) and Blackrock, Inc. (6.7%).
When did Needham Bank Employee Stock Ownership Plan Trust buy into NB Bancorp, Inc.?
The filings give report dates, not purchase dates. The earliest filing from Needham Bank Employee Stock Ownership Plan Trust on this page is the Schedule 13G, filed 2026-02-13, reporting 7.5%.
Is this an audit or a full list?
Neither. The ownership list on this page covers only Schedule 13D and 13G filings, which holders make once they own 5% or more of a class of shares (an amendment can report a stake that has since fallen below 5%); 7 such filings are shown here. It is not an audit and not a full cap table: holders who never reached 5% are not listed, and a stake can change after its latest filing.
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Which insiders own NB Bancorp, Inc. shares?
Directors, officers and holders of 10% or more report their shares on Forms 3, 4 and 5. Each line is the latest such report, largest holding first.
- , the chief executive and president: 484,687 shares (1.1% of shares outstanding), 379,790 held directly and 104,897 indirectly (Form 4, 2026-08-21).
- , a director: 222,402 shares (0.51% of shares outstanding), 142,402 held directly and 80,000 indirectly (Form 4, 2026-04-24).
- , a director: 162,639 shares (0.37% of shares outstanding), 82,639 held directly and 80,000 indirectly (Form 4/A, 2026-05-15).
- , a director: 156,922 shares (0.36% of shares outstanding), 96,922 held directly and 60,000 indirectly (Form 4/A, 2026-05-15).
- , a director: 143,140 shares (0.33% of shares outstanding), 135,640 held directly and 7,500 indirectly (Form 4, 2026-01-06).
Shares outstanding: 43,818,490 as of 2026-10-31, from the company's latest SEC cover page.
How much has NB Bancorp, Inc. raised?
Acquisitions reported on Form 8-K, Item 2.01: acquired Provident Bancorp, Inc. (2025-11-17).
Keep reading
More on NB Bancorp, Inc. and the records around it.
NB Bancorp, Inc. elsewhere on the record
- Acquisition Nov 2025
Companies that share a holder
- Pertento Partners LLP also filed stake reports on 6 other companies: Grocery Outlet Holding Corp. (Oct 2026), Cellebrite DI Ltd. (Oct 2026), Sonida Senior Living, Inc. (Sep 2026)
- BlackRock, Inc. also filed stake reports on 1596 other companies: AvePoint, Inc. (Nov 2026), BIOMARIN PHARMACEUTICAL INC (Nov 2026), MSG RANGERS CORP (Nov 2026)
- The Vanguard Group also filed stake reports on 2384 other companies: BellRing Brands, Inc. (Sep 2026), CAL-MAINE FOODS INC (Sep 2026), FTAI Aviation Ltd. (Sep 2026)
Related pages
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