---
schema_version: "secwatch.filing_event.v1"
accession: "0001104659-26-005790"
form_type: "8-K"
ticker: "NBBK"
cik: "0001979330"
company_name: "NB Bancorp, Inc."
filed_at: "2026-01-22T23:59:59+00:00"
generated_at: "2026-05-16T09:00:24.985042+00:00"
event_type: "earnings"
sentiment: "neutral"
materiality_score: 0.75
calibrated_materiality_score: 0.75
confidence: "high"
source: SEC EDGAR
---

# NB Bancorp reports Q4 net income $7.7M; operating EPS $0.51; approves share repurchase

## Summary
- Net income $7.7M ($0.19 diluted EPS); operating net income $21.2M ($0.51) after $15.7M merger costs.
- Completed Provident acquisition on Nov 15, 2025, adding $1.42B assets, $1.23B loans, $1.13B deposits.
- Net interest margin expanded 14 bps to 3.92%.
- Declared $0.07 quarterly dividend payable Feb 19, 2026; authorized repurchase of up to 2,288,509 shares (5% outstanding).
- Tangible book value per share $17.98 vs $18.48 prior quarter due to goodwill and core deposit intangible.

## SEC filing metadata
- accession: 0001104659-26-005790
- form_type: 8-K
- ticker: NBBK
- cik: 0001979330
- company_name: NB Bancorp, Inc.
- filed_at: 2026-01-22T23:59:59+00:00
- event_type: earnings
- sentiment: neutral
- materiality_score: 0.75
- calibrated_materiality_score: 0.75
- confidence: high
- sec_items: 2.02, 8.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1979330/000110465926005790/0001104659-26-005790-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1979330/000110465926005790/nbbk-20260122x8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001104659-26-005790
- JSON: https://secwatch.observer/filing/0001104659-26-005790.json
- Plain text: https://secwatch.observer/filing/0001104659-26-005790.txt

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