---
schema_version: "secwatch.filing_event.v1"
accession: "0001558370-25-004102"
form_type: "8-K"
ticker: "NBBK"
cik: "0001979330"
company_name: "NB Bancorp, Inc."
filed_at: "2025-03-31T23:59:59+00:00"
generated_at: "2026-05-24T02:34:04.870030+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.5
calibrated_materiality_score: 0.5
confidence: "high"
source: SEC EDGAR
---

# NB Bancorp completes 5% stock repurchase, buying back 2.1M shares at $19.06

## Summary
- Repurchased 2,135,286 shares, or approximately 5% of then-outstanding common stock.
- Average repurchase price of $19.06 per share, inclusive of commission and excise tax.
- Announcement made on March 28, 2025; program is now completed.

## SEC filing metadata
- accession: 0001558370-25-004102
- form_type: 8-K
- ticker: NBBK
- cik: 0001979330
- company_name: NB Bancorp, Inc.
- filed_at: 2025-03-31T23:59:59+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.5
- calibrated_materiality_score: 0.5
- confidence: high
- sec_items: 8.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1979330/000155837025004102/0001558370-25-004102-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1979330/000155837025004102/nbbk-20250328x8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001558370-25-004102
- JSON: https://secwatch.observer/filing/0001558370-25-004102.json
- Plain text: https://secwatch.observer/filing/0001558370-25-004102.txt

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