William Darcey - 24 Apr 2026 Form 4/A - Amendment Insider Report for NB Bancorp, Inc. (NBBK)

Reporting relationship: Director
Issuer ticker: NBBK
Reported as of: 24 Apr 2026
Net transaction value: $0
SEC form: 4/A - Amendment
Accepted by SEC: 15 May 2026, 11:08:29 UTC
Original report date: 27 Apr 2026
Prior SEC filing: 06 Jan 2026
Source filing: View source filing
Reporting owner signature: /s/ Steven T. Lanter, pursuant to power of attorney

Key filing fact

William Darcey filed Form 4/A - Amendment for NB Bancorp, Inc. (NBBK) on 15 May 2026.

Key facts

This page summarizes William Darcey's Form 4/A - Amendment filing for NB Bancorp, Inc. (NBBK).
0 reported transactions and 0 derivative rows are listed below.
Accepted by SEC: 15 May 2026, 11:08.

Change

Previous filing in this sequence was filed on 06 Jan 2026.
Current net transaction value: $0.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4/A - Amendment disclosures.

View source filing

Reporting Owners (1)

CIK 0002003467 Primary reporting owner

Darcey William

Relationship: Director
Address: 1063 GREAT PLAIN AVE, NEEDHAM
Signature: /s/ Steven T. Lanter, pursuant to power of attorney
Signature date: 15 May 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

NBBK holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 82,639
Date: 24 Apr 2026
Ownership: Direct
Footnotes: F1, F2, F3

NBBK holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 80,000
Date: 24 Apr 2026
Ownership: By IRA

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 3 footnotes

Footnote F1

Includes shares of restricted stock which vest at a rate of 20% per year commencing on April 24, 2026.

Footnote F2

Includes shares of restricted stock which vest 100% on January 2, 2027.

Footnote F3

On April 27, 2026, a Form 4 was mistakenly filed reporting a disposition of shares of common stock that did not in fact occur. The change in the securities beneficially owned has been corrected accordingly in this amended Form 4.