---
schema_version: "secwatch.filing_event.v1"
accession: "0001558370-25-000036"
form_type: "8-K"
ticker: "NBBK"
cik: "0001979330"
company_name: "NB Bancorp, Inc."
filed_at: "2025-01-06T23:59:59+00:00"
generated_at: "2026-05-28T11:35:14.782076+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.6
calibrated_materiality_score: 0.6
confidence: "high"
source: SEC EDGAR
---

# NB Bancorp appoints Christine Roberts as COO, succeeding Salvatore Rinaldi who retired

## Summary
- Salvatore Rinaldi resigned as COO effective Jan 3, 2025; will assist transition until Feb 7, 2025.
- Christine Roberts appointed EVP and COO effective Jan 6, 2025; previously EVP at Citizens Bank.
- Roberts enters change-in-control agreement with 18-month term, 1.5x annual compensation on qualifying termination.
- Rinaldi's retirement was previously disclosed in July 2024 as planned succession.

## SEC filing metadata
- accession: 0001558370-25-000036
- form_type: 8-K
- ticker: NBBK
- cik: 0001979330
- company_name: NB Bancorp, Inc.
- filed_at: 2025-01-06T23:59:59+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.6
- calibrated_materiality_score: 0.6
- confidence: high
- sec_items: 5.02, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1979330/000155837025000036/0001558370-25-000036-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1979330/000155837025000036/nbbk-20250103x8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001558370-25-000036
- JSON: https://secwatch.observer/filing/0001558370-25-000036.json
- Plain text: https://secwatch.observer/filing/0001558370-25-000036.txt

## Key facts
- Executive change
  Salvatore Rinaldi resigned as Chief Operating Officer at NB Bancorp, Inc..
  - Action: resigned
  - Role: Chief Operating Officer
  source text: effective January 3, 2025, Salvatore Rinaldi resigned as Chief Operating Officer of the Company and its subsidiary, Needham Bank (the “Bank”).
  evidence_url: https://www.sec.gov/Archives/edgar/data/1979330/000155837025000036/0001558370-25-000036-index.htm
- Executive change
  Christine Roberts was appointed as Executive Vice President and Chief Operating Officer at NB Bancorp, Inc..
  - Action: appointed
  - Role: Executive Vice President and Chief Operating Officer
  source text: effective January 6, 2025, Christine Roberts was appointed Executive Vice President and Chief Operating Officer of the Company and the Bank.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1979330/000155837025000036/0001558370-25-000036-index.htm

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