# EDGAR Filing Document

**Accession Number:** 0001979330
**File Stem:** 0000919574-25-003565
**Filing Date:** 2025-6
**Character Count:** 10069
**Document Hash:** fc7322a8454e531dfe4af5439f5797e3
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0000919574-25-003565.hdr.sgml**: 20250611

**ACCESSION NUMBER**: 0000919574-25-003565

**CONFORMED SUBMISSION TYPE**: SCHEDULE 13G

**PUBLIC DOCUMENT COUNT**: 2

**FILED AS OF DATE**: 20250611

**DATE AS OF CHANGE**: 20250611

**SUBJECT COMPANY**: 

**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:** SCHEDULE 13G
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 005-94523
- **FILM NUMBER:** 251040895

**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
**FILED BY**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Pertento Partners LLP
- **CENTRAL INDEX KEY:** 0001894571

**ORGANIZATION NAME:**
- **EIN:** 000000000

**FILING VALUES:**
- **FORM TYPE:** SCHEDULE 13G

**BUSINESS ADDRESS:**
- **STREET 1:** 111 PARK STREET
- **CITY:** LONDON
- **STATE:** X0
- **ZIP:** W1K 7JL
- **BUSINESS PHONE:** 020717310572

**MAIL ADDRESS:**
- **STREET 1:** 111 PARK STREET
- **CITY:** LONDON
- **STATE:** X0
- **ZIP:** W1K 7JL

## Ex-99

<u>Exhibit A</u>

<u>JOINT FILING AGREEMENT</u>

The undersigned agree that this Schedule 13G dated June 11, 2025 relating to the Common Stock, par value $0.01 per share, of NB Bancorp, Inc. shall be filed on behalf of the undersigned.

---

| |
|:---|
| &nbsp;&nbsp; PERTENTO PARTNERS LLP<br>By: /s/ Eduardo Marques |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Name: Eduardo Marques |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Title: Managing Partner |

---

&nbsp;&nbsp; EDUARDO MARQUES<br>By: /s/ Eduardo Marques<br>

### UNITED STATES SECURITIES AND EXCHANGE COMMISSION
**Washington, D.C. 20549**

## SCHEDULE 13G

### Under the Securities Exchange Act of 1934

**Issuer:** NB Bancorp, Inc.

**Title of Class of Securities:** Common Stock, par value $0.01 per share

**CUSIP Number:** 63945M107

**Date of Event Which Requires Filing of this Statement:** 06/06/2025

**Check the appropriate box to designate the rule pursuant to which this Schedule is filed:**

- [ ] Rule 13d-1(b)

- [x] Rule 13d-1(c)

- [ ] Rule 13d-1(d)

---

| 1. | Names of Reporting Persons<br>PERTENTO PARTNERS LLP | Names of Reporting Persons<br>PERTENTO PARTNERS LLP |
|:---|:---|:---|:---|
| 2. | Check the Appropriate Box if a Member of a Group (See Instructions)<br>(a) [ ] (b) [ ] | Check the Appropriate Box if a Member of a Group (See Instructions)<br>(a) [ ] (b) [ ] |
| 3. | SEC Use Only | SEC Use Only |
| 4. | Citizenship or Place of Organization<br>X0 | Citizenship or Place of Organization<br>X0 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 5. | Sole Voting Power<br>0.00 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 6. | Shared Voting Power<br>2114336.00 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 7. | Sole Dispositive Power<br>0.00 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 8. | Shared Dispositive Power<br>2114336.00 |
| 9. | Aggregate Amount Beneficially Owned by Each Reporting Person<br>2114336.00 | Aggregate Amount Beneficially Owned by Each Reporting Person<br>2114336.00 |
| 10. | Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) [ ] | Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) [ ] |
| 11. | Percent of Class Represented by Amount in Row (9)<br>5.2% | Percent of Class Represented by Amount in Row (9)<br>5.2% |
| 12. | Type of Reporting Person (See Instructions)<br>IA | Type of Reporting Person (See Instructions)<br>IA |

---

| 1. | Names of Reporting Persons<br>EDUARDO MARQUES | Names of Reporting Persons<br>EDUARDO MARQUES |
|:---|:---|:---|:---|
| 2. | Check the Appropriate Box if a Member of a Group (See Instructions)<br>(a) [ ] (b) [ ] | Check the Appropriate Box if a Member of a Group (See Instructions)<br>(a) [ ] (b) [ ] |
| 3. | SEC Use Only | SEC Use Only |
| 4. | Citizenship or Place of Organization<br>D5 | Citizenship or Place of Organization<br>D5 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 5. | Sole Voting Power<br>0.00 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 6. | Shared Voting Power<br>2114336.00 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 7. | Sole Dispositive Power<br>0.00 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 8. | Shared Dispositive Power<br>2114336.00 |
| 9. | Aggregate Amount Beneficially Owned by Each Reporting Person<br>2114336.00 | Aggregate Amount Beneficially Owned by Each Reporting Person<br>2114336.00 |
| 10. | Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) [ ] | Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) [ ] |
| 11. | Percent of Class Represented by Amount in Row (9)<br>5.2% | Percent of Class Represented by Amount in Row (9)<br>5.2% |
| 12. | Type of Reporting Person (See Instructions)<br>HC, IN | Type of Reporting Person (See Instructions)<br>HC, IN |

---

**Item 1(a). Name of Issuer:**
NB Bancorp, Inc.

**Item 1(b). Address of Issuer's Principal Executive Offices:**
1063 Great Plain Avenue, Needham, Massachusetts 02492

**Item 2(a). Name of Person Filing:**
Pertento Partners LLP
Eduardo Marques

**Item 2(b). Address of Principal Business Office:**
Pertento Partners LLP
111 Park Street
London W1K7JL
United Kingdom

Eduardo Marques
111 Park Street
London W1K7JL
United Kingdom

**Item 2(c). Citizenship:**
Pertento Partners LLP - Other - United Kingdom
Eduardo Marques - Other - Brazil

**Item 2(d). Title of Class of Securities:**
Common Stock, par value $0.01 per share

**Item 2(e). CUSIP Number:**
63945M107

**Item 3. If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:**

(a) [ ] Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o).

(b) [ ] Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c).

(c) [ ] Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c).

(d) [ ] Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8).

(e) [ ] An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);

(f) [ ] An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);

(g) [ ] A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);

(h) [ ] A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);

(i) [ ] A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);

(j) [ ] A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J), if filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J), please specify the type of institution:

(k) [ ] Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).

**Item 4. Ownership:**

**(a) Amount beneficially owned:**

Pertento Partners LLP - 2,114,336
Eduardo Marques - 2,114,336

**(b) Percent of class:**

Pertento Partners LLP - 5.2%
Eduardo Marques - 5.2%

**(c) Number of shares as to which the person has:**

**(i) Sole power to vote or to direct the vote:**

Pertento Partners LLP - 0
Eduardo Marques - 0

**(ii) Shared power to vote or to direct the vote:**

Pertento Partners LLP - 2,114,336
Eduardo Marques - 2,114,336

**(iii) Sole power to dispose or to direct the disposition of:**

Pertento Partners LLP - 0
Eduardo Marques - 0

**(iv) Shared power to dispose or to direct the disposition of:**

Pertento Partners LLP - 2,114,336
Eduardo Marques - 2,114,336

**Item 5. Ownership of Five Percent or Less of a Class.**

[x] If this statement is being filed to report the fact that as of the date hereof the reporting person has ceased to be the beneficial owner of more than five percent of the class of securities, check the following.

**Item 6. Ownership of More than 5 Percent on Behalf of Another Person.**

All of the securities reported in this Schedule 13G are directly owned by advisory clients of Pertento Partners LLP. None of those advisory clients may be deemed to beneficially own more than 5% of the Common Stock, par value $0.01 per share.

**Item 7. Identification and Classification of the Subsidiary**

Not Applicable

**Item 8. Identification and Classification of Members of the Group**

Not Applicable

**Item 9. Notice of Dissolution of Group**

Not Applicable

**Item 10. Certification:**

By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under ?? 240.14a-11.

### SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

**PERTENTO PARTNERS LLP**

**Date:** 06/11/2025

**By:** By: /s/ Eduardo Marques

**Name & Title:** Eduardo Marques, Managing Partner

**EDUARDO MARQUES**

**Date:** 06/11/2025

**By:** By: /s/ Eduardo Marques

**Name & Title:** Eduardo Marques