---
schema_version: "secwatch.filing_event.v1"
accession: "0001104659-26-085826"
form_type: "8-K"
ticker: "NBBK"
cik: "0001979330"
company_name: "NB Bancorp, Inc."
filed_at: "2026-07-22T20:30:37+00:00"
generated_at: "2026-07-22T20:32:18.512483+00:00"
event_type: "earnings"
sentiment: "positive"
materiality_score: 0.75
calibrated_materiality_score: 0.75
confidence: "high"
source: SEC EDGAR
---

# NB Bancorp Q2 net income $21.1M ($0.53 EPS), up 41% QoQ; NIM expands to 4.00%

## Summary
- Net income $21.1M ($0.53 diluted EPS) vs $15.0M ($0.36) prior quarter; operating net income $21.9M ($0.55).
- Net interest margin expanded 7 bps to 4.00%; loans grew 3.4% to $6.42B, deposits up 3.7% to $6.32B.
- Credit quality improved: net charge-offs annualized 0.07% (from 0.91%), NPLs fell to 0.43% from 0.73%.
- Board declared $0.07/share dividend, payable Aug 19 to holders of record Aug 5.
- Repurchased 918,727 shares at $20.13/share; tangible book value per share $18.51.

## SEC filing metadata
- accession: 0001104659-26-085826
- form_type: 8-K
- ticker: NBBK
- cik: 0001979330
- company_name: NB Bancorp, Inc.
- filed_at: 2026-07-22T20:30:37+00:00
- event_type: earnings
- sentiment: positive
- materiality_score: 0.75
- calibrated_materiality_score: 0.75
- confidence: high
- sec_items: 2.02, 7.01, 8.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1979330/000110465926085826/0001104659-26-085826-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1979330/000110465926085826/nbbk-20260722x8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001104659-26-085826
- JSON: https://secwatch.observer/filing/0001104659-26-085826.json
- Plain text: https://secwatch.observer/filing/0001104659-26-085826.txt

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