Welcome to our dedicated page for NB Bancorp SEC filings (Ticker: NBBK), a comprehensive resource for investors and traders seeking official regulatory documents including 10-K annual reports, 10-Q quarterly earnings, 8-K material events, and insider trading forms.
NB Bancorp, Inc. (NBBK) SEC Filings Overview
This page provides access to NB Bancorp, Inc.’s SEC filings, which document the regulatory and financial reporting of the bank holding company for Needham Bank. As an emerging growth company with common stock listed on The Nasdaq Stock Market under the symbol NBBK, NB Bancorp files Annual Reports on Form 10-K, Quarterly Reports on Form 10-Q and Current Reports on Form 8-K, among other documents.
Through these filings, investors can review information on NB Bancorp’s loan and deposit composition, net interest income and margin, noninterest income and expenses, provision for credit losses, asset quality metrics and capital management activities. Earnings-related Form 8-K filings, for example, describe quarterly financial results, including changes in commercial real estate, multi-family, construction and land development, commercial and industrial and consumer loan portfolios, as well as updates on the allowance for credit losses, non-performing loans and net charge-offs or recoveries.
NB Bancorp also uses Form 8-K to report material events such as the adoption of share repurchase plans, the declaration of dividends and significant corporate transactions. A series of 8-K and 8-K/A filings in 2025 detail the Agreement and Plan of Merger with Provident Bancorp, Inc. and BankProv, the mailing of stock and cash election materials, the receipt of all regulatory approvals, the final proration of merger consideration and the completion of the merger transaction on November 15, 2025. These filings explain the merger structure, consideration terms, allocation and proration procedures and the treatment of Provident equity awards.
On this page, users can track such filings as they are made available through EDGAR, and AI-powered tools can help summarize lengthy documents, highlight key terms and clarify complex sections. This includes identifying major items in Form 10-K and 10-Q reports, outlining the main provisions of merger-related 8-K filings and pointing to disclosures on topics such as dividend declarations, share repurchase plans and changes in the company’s governance or board composition.
NB Bancorp, Inc., the parent of Needham Bank, has made an investor slide presentation available in connection with an in-person investors bank meeting scheduled for June 2, 2026. The presentation, filed as Exhibit 99.1, provides information on the company’s operations and financial performance.
NB Bancorp, Inc. President, CEO and Chairman Joseph P. Campanelli reported multiple open-market purchases of the company’s Common Stock on May 15, 2026. He bought a total of 3,000 shares at prices around $19.17–$19.21 per share. After these purchases, he directly owns 375,290 shares of NB Bancorp common stock. He also reports indirect holdings of 3,677 shares through an ESOP, 50,470 shares through a 401(k), 47,000 shares in an IRA, and 3,000 shares as trustee for a trust. Some of the reported direct holdings include restricted stock that vests gradually beginning in 2026 and 2027.
NB Bancorp, Inc. receives an Amendment No. 2 to a Schedule 13G/A disclosing that Pertento Partners LLP, Pertento Advisors LLC and Eduardo Marques each report shared beneficial ownership of 2,049,614 shares of Common Stock, representing 4.6% of the class. The filing lists the holders' addresses and a Joint Filing Agreement.
The reported holdings are held on behalf of advisory clients; the filing states none of those clients individually own over 5%.
NB Bancorp, Inc. director Christopher R. Lynch filed an amended insider report updating his share holdings. The filing shows he holds 96,922 shares of common stock directly and 60,000 shares indirectly through an IRA. These amounts include restricted stock that vests 20% per year starting on April 24, 2026, and additional restricted shares that vest fully on January 2, 2027.
The amendment notes that an earlier Form 4 filed on April 27, 2026 mistakenly reported a sale of common stock that did not actually occur, and the beneficial ownership figures have been corrected accordingly.
NB Bancorp, Inc. director Kenneth C. Montgomery filed an amended Form 4 to update his holdings of common stock. The filing shows he beneficially owns 85,140 shares directly after correcting a previously reported change. A prior Form 4 filed on April 27, 2026 had mistakenly reported a disposition of common shares that did not actually occur, and this amendment reverses that error.
The holding includes restricted stock that vests 100% on January 2, 2027, as well as additional restricted shares that vest at a rate of 20% per year starting April 24, 2026. The amendment does not report any new purchase or sale, but clarifies his current equity position and the scheduled vesting of his awards.
NB Bancorp, Inc. director Joseph R. Nolan Jr. filed an amended Form 4 to correct a previously reported disposition of common stock that the footnotes state did not occur. The amendment shows he directly holds 87,739 shares of common stock.
This holding includes restricted stock that vests at a rate of 20% per year commencing on April 24, 2026, and additional restricted shares that vest 100% on January 2, 2027. The filing updates his beneficial ownership without recording a new purchase or sale.
NB Bancorp, Inc. director Mark Whalen filed an amended Form 4 that updates his reported holdings without showing any new buy or sell transactions. The filing reports 77,639 shares of common stock held directly and 30,000 shares held indirectly as trustee for a trust.
Footnotes explain that the direct holdings include restricted stock that vests 20% per year starting on April 24, 2026 and additional restricted stock vesting 100% on January 2, 2027. The amendment corrects a previously filed Form 4 that had mistakenly reported a disposition of common shares that did not actually occur.
NB Bancorp, Inc. director Angela Jackson filed an amended insider report to correct a previously reported share disposition that did not actually occur. The filing shows she beneficially owns 81,255 shares of common stock, including restricted stock that vests 20% per year starting April 24, 2026 and additional restricted shares that vest 100% on January 2, 2027.
NB Bancorp, Inc. director William Darcey filed an amended Form 4 to correct a prior error. A Form 4 filed on April 27, 2026 had mistakenly reported a sale of common stock that never occurred, and this amendment updates the beneficial ownership records.
Following the correction, Darcey is shown holding 80,000 shares of common stock indirectly through an IRA and 82,639 shares directly. The direct holdings include restricted stock that vests 20% per year starting on April 24, 2026, plus additional restricted shares vesting 100% on January 2, 2027.
NB Bancorp, Inc. reported that it has completed its latest stock repurchase program. The company bought back 2,207,236 shares, about 5% of its then outstanding common stock, at an average price of $20.96 per share including commission and excise tax.
Across three programs since January 22, 2025, NB Bancorp has repurchased 6,371,044 shares, equal to 16% of the common shares issued in its initial public offering at the end of 2023, at a weighted average price of $19.25 per share. The company reported tangible book value per share of $18.00 as of March 31, 2026.