---
schema_version: "secwatch.filing_event.v1"
accession: "0001104659-25-111189"
form_type: "8-K/A"
ticker: "NBBK"
cik: "0001979330"
company_name: "NB Bancorp, Inc."
filed_at: "2025-11-13T23:59:59+00:00"
generated_at: "2026-05-16T20:38:47.064566+00:00"
event_type: "m_and_a"
sentiment: "neutral"
materiality_score: 0.6
calibrated_materiality_score: 0.6
confidence: "high"
source: SEC EDGAR
---

# NB Bancorp finalizes merger proration; 66.4% of cash electors get cash, ~5.94M shares to be issued

## Summary
- Stock election: 16.31% of shares; cash election: 75.33%; non-election: 8.36%.
- After proration, ~66.377% of cash election shares get $13.00 cash; remaining get 0.691 NBBK shares per PVBC share.
- Needham to issue ~5.94M NBBK shares; pro forma shares outstanding ~45.77M.
- Merger expected to close Nov 15, 2025; Needham and Provident to combine.

## SEC filing metadata
- accession: 0001104659-25-111189
- form_type: 8-K/A
- ticker: NBBK
- cik: 0001979330
- company_name: NB Bancorp, Inc.
- filed_at: 2025-11-13T23:59:59+00:00
- event_type: m_and_a
- sentiment: neutral
- materiality_score: 0.6
- calibrated_materiality_score: 0.6
- confidence: high
- sec_items: 8.01, 7.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1979330/000110465925111189/0001104659-25-111189-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1979330/000110465925111189/tm2531216d1_8ka.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001104659-25-111189
- JSON: https://secwatch.observer/filing/0001104659-25-111189.json
- Plain text: https://secwatch.observer/filing/0001104659-25-111189.txt

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