Joseph P. Campanelli, President and CEO of NB Bancorp, Inc. (NASDAQ:NBBK), filed a Form 4 on August 21, 2026, disclosing an open-market purchase of 2,000 shares of common stock on August 20, 2026.

Key Highlights

  • Purchase transaction: Campanelli acquired 2,000 shares of NB Bancorp common stock at $21.75 per share on August 20, 2026.
  • Direct ownership following transaction: 379,790 shares held directly after the reported purchase, per the filing.
  • Additional indirect holdings: 47,000 shares held by IRA, 3,000 shares as trustee for a trust, 51,220 shares by 401(k), and 3,677 shares by ESOP.
  • Restricted stock vesting: A portion of directly held shares includes restricted stock vesting at 20% per year commencing April 24, 2026, and additional restricted stock vesting at 33 1/3% per year commencing February 25, 2027.
  • Roles: Campanelli is identified in the filing as President and CEO as well as Chairman of the Board.

NB Bancorp CEO and Chairman Reports Open-Market Share Purchase

According to the Form 4 filed with the SEC on August 21, 2026, Joseph P. Campanelli, who serves as President, CEO, and Chairman of the Board of NB Bancorp, Inc., purchased 2,000 shares of the company's common stock on August 20, 2026. The transaction code recorded is "P," indicating an open-market purchase. The per-share price reported in the filing is $21.75.

Following the transaction, the filing reports that Campanelli directly holds 379,790 shares of common stock. The filing notes that this figure includes shares of restricted stock that vest at a rate of 20% per year beginning April 24, 2026, as well as shares of restricted stock that vest at a rate of 33 1/3% per year beginning February 25, 2027. In addition to direct holdings, the filing discloses indirect beneficial ownership of 47,000 shares held by an IRA, 3,000 shares held as trustee for a trust, 51,220 shares held through a 401(k) plan, and 3,677 shares held through an ESOP.

No derivative securities transactions were reported in Table II of the filing. The Form 4 was signed by Kate Henry under a Power of Attorney and lists Exhibit 24 as a Power of Attorney in the exhibit list.

What Was Disclosed

The filing discloses a single open-market purchase of 2,000 shares of NB Bancorp common stock at $21.75 per share by President, CEO, and Chairman Joseph P. Campanelli on August 20, 2026, with resulting direct beneficial ownership of 379,790 shares.