---
schema_version: "secwatch.filing_event.v1"
accession: "0001558370-25-006629"
form_type: "8-K"
ticker: "NBBK"
cik: "0001979330"
company_name: "NB Bancorp, Inc."
filed_at: "2025-05-07T23:59:59+00:00"
generated_at: "2026-05-22T09:24:15.562336+00:00"
event_type: "other_material"
sentiment: "positive"
materiality_score: 0.5
calibrated_materiality_score: 0.5
confidence: "high"
source: SEC EDGAR
---

# NB Bancorp authorizes 2nd stock repurchase plan for up to 5% of shares outstanding

## Summary
- Plan authorizes repurchase of up to 2,028,522 shares, approx. 5.0% of outstanding shares.
- Second buyback plan since mutual-to-stock conversion and IPO in December 2023.
- Shares may be repurchased in open market, private transactions, or under Rule 10b5-1 plans.
- Repurchases subject to market conditions, stock price, capital uses, and management discretion.
- Plan may be suspended, terminated, or modified at any time; no obligation to repurchase any shares.

## SEC filing metadata
- accession: 0001558370-25-006629
- form_type: 8-K
- ticker: NBBK
- cik: 0001979330
- company_name: NB Bancorp, Inc.
- filed_at: 2025-05-07T23:59:59+00:00
- event_type: other_material
- sentiment: positive
- materiality_score: 0.5
- calibrated_materiality_score: 0.5
- confidence: high
- sec_items: 8.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1979330/000155837025006629/0001558370-25-006629-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1979330/000155837025006629/nbbk-20250507x8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001558370-25-006629
- JSON: https://secwatch.observer/filing/0001558370-25-006629.json
- Plain text: https://secwatch.observer/filing/0001558370-25-006629.txt

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