---
schema_version: "secwatch.filing_event.v1"
accession: "0001558370-25-008435"
form_type: "8-K"
ticker: "NBBK"
cik: "0001979330"
company_name: "NB Bancorp, Inc."
filed_at: "2025-06-05T23:59:59+00:00"
generated_at: "2026-05-19T22:56:09.387883+00:00"
event_type: "m_and_a"
sentiment: "neutral"
materiality_score: 0.85
calibrated_materiality_score: 0.85
confidence: "high"
source: SEC EDGAR
---

# NB Bancorp to acquire Provident Bancorp; shareholders get 0.691 shares or $13 cash

## Summary
- Election of 0.691 NBBK shares or $13 cash per Provident share, prorated to 50% stock/50% cash.
- Merger expected to close Q4 2025; termination fee of $8.5M payable by Provident under certain conditions.
- Voting agreements with Provident directors/officers covering ~4.17% of shares; they agree to vote for the deal.
- Post-merger, Provident CEO Joseph B. Reilly joins NBBK and Needham Bank boards; consulting fee $27,500/month for 18 months plus $1.05M in lump sums.
- Provident equity awards will be cashed out; options and restricted stock vest at effective time.

## SEC filing metadata
- accession: 0001558370-25-008435
- form_type: 8-K
- ticker: NBBK
- cik: 0001979330
- company_name: NB Bancorp, Inc.
- filed_at: 2025-06-05T23:59:59+00:00
- event_type: m_and_a
- sentiment: neutral
- materiality_score: 0.85
- calibrated_materiality_score: 0.85
- confidence: high
- sec_items: 1.01, 5.02, 7.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1979330/000155837025008435/0001558370-25-008435-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1979330/000155837025008435/nbbk-20250605x8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001558370-25-008435
- JSON: https://secwatch.observer/filing/0001558370-25-008435.json
- Plain text: https://secwatch.observer/filing/0001558370-25-008435.txt

## Key facts
- Executive change
  Joseph B. Reilly was appointed as Director at NB Bancorp, Inc..
  - Action: appointed
  - Role: Director
  source text: Upon and subject to the completion of the Merger, Joseph B. Reilly, Provident’s Director, President and Chief Executive Officer will join the respective Boards of Directors of the Company and Needham Bank.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1979330/000155837025008435/0001558370-25-008435-index.htm

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.