---
schema_version: "secwatch.filing_event.v1"
accession: "0001104659-23-108753"
form_type: "8-K"
ticker: "NBBK"
cik: "0001979330"
company_name: "NB Bancorp, Inc."
filed_at: "2023-10-12T23:59:59+00:00"
generated_at: "2026-06-10T01:15:17.153185+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.55
calibrated_materiality_score: 0.55
confidence: "high"
source: SEC EDGAR
---

# NB Bancorp hires Piper Sandler for stock offering in mutual-to-stock conversion

## Summary
- Piper Sandler will market common stock in connection with NB Financial MHC's conversion to a stock holding company.
- Fee is 1.35% of subscription offering proceeds and 3.00% of community offering proceeds.
- Piper Sandler receives $85,000 for records services plus expense reimbursement.
- Syndicated community offering fee capped at 5.0% of aggregate purchase price.
- Shares offered under S-1 registration statement; prospectus dated October 12, 2023.

## SEC filing metadata
- accession: 0001104659-23-108753
- form_type: 8-K
- ticker: NBBK
- cik: 0001979330
- company_name: NB Bancorp, Inc.
- filed_at: 2023-10-12T23:59:59+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.55
- calibrated_materiality_score: 0.55
- confidence: high
- sec_items: 1.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1979330/000110465923108753/0001104659-23-108753-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1979330/000110465923108753/tm2328196d1_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001104659-23-108753
- JSON: https://secwatch.observer/filing/0001104659-23-108753.json
- Plain text: https://secwatch.observer/filing/0001104659-23-108753.txt

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