# EDGAR Filing Document

**Accession Number:** 0001979330
**File Stem:** 0001104659-26-035770
**Filing Date:** 2026-3
**Character Count:** 1102
**Document Hash:** f637996d0b65e819c2120f1829b8f0b7
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001104659-26-035770.hdr.sgml**: 20260327

**ACCESSION NUMBER**: 0001104659-26-035770

**CONFORMED SUBMISSION TYPE**: ARS

**PUBLIC DOCUMENT COUNT**: 1

**CONFORMED PERIOD OF REPORT**: 20251231

**FILED AS OF DATE**: 20260327

**DATE AS OF CHANGE**: 20260327

**EFFECTIVENESS DATE**: 20260327

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** NB Bancorp, Inc.
- **CENTRAL INDEX KEY:** 0001979330
- **STANDARD INDUSTRIAL CLASSIFICATION:** SAVINGS INSTITUTIONS, NOT FEDERALLY CHARTERED [6036]
- **ORGANIZATION NAME:** 02 Finance
- **EIN:** 932560883
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** ARS
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-41899
- **FILM NUMBER:** 26801584

**BUSINESS ADDRESS:**
- **STREET 1:** 1063 GREAT PLAIN AVENUE
- **CITY:** NEEDHAM
- **STATE:** MA
- **ZIP:** 02492
- **BUSINESS PHONE:** 781-444-2100

**MAIL ADDRESS:**
- **STREET 1:** 1063 GREAT PLAIN AVENUE
- **CITY:** NEEDHAM
- **STATE:** MA
- **ZIP:** 02492

### Attached PDF Documents

**Attachment 1:** `tm267886d2_ars.pdf`

_No text found in this document._