---
schema_version: "secwatch.filing_event.v1"
accession: "0001104659-25-110932"
form_type: "8-K"
ticker: "NBBK"
cik: "0001979330"
company_name: "NB Bancorp, Inc."
filed_at: "2025-11-13T23:59:59+00:00"
generated_at: "2026-05-16T20:38:47.401718+00:00"
event_type: "m_and_a"
sentiment: "neutral"
materiality_score: 0.65
calibrated_materiality_score: 0.65
confidence: "high"
source: SEC EDGAR
---

# NBBK announces final proration: 66.4% of PVBC cash electors get cash, balance stock

## Summary
- Elections: 16.31% stock, 75.33% cash, 8.36% non-election; after proration 66.377% of cash electors receive cash, 33.623% receive stock.
- Needham to issue ~5,944,350 shares; pro forma shares outstanding ~45,770,800 as of Nov 12, 2025.
- Stock consideration: 0.691 NBBK shares per PVBC share; cash consideration: $13.00 per PVBC share.
- Merger expected to close on November 15, 2025 at 12:01 a.m. Eastern Time.

## SEC filing metadata
- accession: 0001104659-25-110932
- form_type: 8-K
- 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: 0.65
- calibrated_materiality_score: 0.65
- confidence: high
- sec_items: 8.01, 7.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1979330/000110465925110932/0001104659-25-110932-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1979330/000110465925110932/tm2531089d1_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001104659-25-110932
- JSON: https://secwatch.observer/filing/0001104659-25-110932.json
- Plain text: https://secwatch.observer/filing/0001104659-25-110932.txt

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