---
schema_version: "secwatch.filing_event.v1"
accession: "0001104659-25-112965"
form_type: "8-K"
ticker: "NBBK"
cik: "0001979330"
company_name: "NB Bancorp, Inc."
filed_at: "2025-11-17T23:59:59+00:00"
generated_at: "2026-05-16T19:24:34.784297+00:00"
event_type: "m_and_a"
sentiment: "neutral"
materiality_score: 0.75
calibrated_materiality_score: 0.75
confidence: "high"
source: SEC EDGAR
---

# NB Bancorp completes acquisition of Provident Bancorp; issues ~5.94M shares

## Summary
- Merger closed Nov 15, 2025; each Provident share converts to 0.691 NBBK shares or $13 cash, prorated 50/50.
- Needham will issue approx 5,944,350 shares; pro forma outstanding shares ~45,770,800.
- Joseph B. Reilly appointed as director; receives $800K severance, $250K non-compete, and $27.5K/mo consulting for 18 months.
- Cash consideration funded from Needham's cash on hand.

## SEC filing metadata
- accession: 0001104659-25-112965
- form_type: 8-K
- ticker: NBBK
- cik: 0001979330
- company_name: NB Bancorp, Inc.
- filed_at: 2025-11-17T23:59:59+00:00
- event_type: m_and_a
- sentiment: neutral
- materiality_score: 0.75
- calibrated_materiality_score: 0.75
- confidence: high
- sec_items: 2.01, 5.02, 7.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1979330/000110465925112965/0001104659-25-112965-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1979330/000110465925112965/tm2531268d3_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001104659-25-112965
- JSON: https://secwatch.observer/filing/0001104659-25-112965.json
- Plain text: https://secwatch.observer/filing/0001104659-25-112965.txt

## Key facts
- M&A Transactions
  NB Bancorp, Inc. completed an acquisition involving Provident Bancorp, Inc. for 0.691 shares of Needham common stock per share or $13.00 per share in cash (closed 2025-11-15).
  - Action: acquisition
  - Counterparty: Provident Bancorp, Inc.
  - Consideration: 0.691 shares of Needham common stock per share or $13.00 per share in cash
  - Closing: 2025-11-15
  source text: f Provident Bancorp, Inc. (“Provident”) and BankProv, a wholly owned subsidiary of Provident.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1979330/000110465925112965/0001104659-25-112965-index.htm

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