NB Bancorp, Inc. (NBBK) - Dilution Analysis

Visualizing historical and potential share dilution over time

Dilution Analysis

High Risk
Significant dilution risk
Last updated: November 13, 2025

Risk Assessment Details

Potential Dilution: 89.57% of current shares
Recent Dilution: 22.15% (2 years)
Historical Dilution Factor: moderate recent dilution
Outstanding Shares
46M
Potential Supply
41M
Additional shares possible
Splits
None
Past 2 years

Summary

NBBK currently has 45.8M outstanding shares. with significant dilution risk as 41M authorized shares could dilute existing holders by 89.6%. The company has diluted shareholders by 22.15% over the past 2 years through share issuances.

Share Structure Timeline

Outstanding Shares
Total Supply

Historical Data Points

Date Event Outstanding Supply
Nov 13, 2025

8-K filing: NB Bancorp, Inc. will issue approximately 5,944,350 shares of its common stock in a merger with Provident Bancorp, Inc., with a pro forma total of approximately 45,770,800 shares of Needham common stock outstanding after the merger.

46M 41M
Aug 08, 2025

10-Q filing | 37.6M shares outstanding

38M 41M
Jul 16, 2025

8-K filing: NB Bancorp, Inc. announced the completion of its stock repurchase program, repurchasing 2,028,522 shares at an average price of $17.96 per share.

39M 41M
May 09, 2025

10-Q filing | 38.8M shares outstanding

39M 41M
May 07, 2025

8-K filing: On May 7, 2025, the Company announced an additional stock repurchase plan that authorizes the Company to repurchase up to 2,028,522 shares, or approximately 5%, of its then outstanding common stock.

39M 41M
Mar 31, 2025

8-K filing: NB Bancorp, Inc. completed a stock repurchase program, repurchasing 2,135,286 shares of its common stock at an average price of $19.06 per share.

39M 41M
Mar 07, 2025

10-K filing | 39.4M shares outstanding

39M 41M
Jan 22, 2025

8-K filing: On January 22, 2025, NB Bancorp, Inc. announced a stock repurchase program that authorizes the Company to purchase up to 2,135,287 shares, or 5%, of the Company's outstanding shares of common stock.

39M 41M
Nov 08, 2024

10-Q filing | 39.3M shares outstanding

39M 41M
Aug 09, 2024

10-Q filing | 39.3M shares outstanding

39M 41M
May 10, 2024

10-Q filing | 39.7M shares outstanding

40M 41M
Mar 28, 2024

10-K filing | 42.0M shares outstanding

42M 41M
Oct 10, 2023

S-1/A filing: NB Bancorp, Inc. is offering up to 40,997,500 shares of common stock for sale in connection with the conversion of NB Financial, MHC, from a mutual holding company to a stock holding company form of organization.

N/A 41M
Oct 02, 2023

S-1/A filing: NB Bancorp, Inc. is offering shares of common stock for sale in connection with the conversion of NB Financial, MHC, from a mutual holding company to a stock holding company form of organization.

N/A 41M
Sep 29, 2023

S-1/A filing: NB Bancorp, Inc. is offering up to 40,997,500 shares of common stock for sale in connection with the conversion of NB Financial, MHC, from a mutual holding company to a stock holding company form of organization, with a minimum of 26,350,000 shares required to be sold at $10.00 per share.

N/A 41M
Sep 01, 2023

S-1/A filing: NB Bancorp, Inc. is offering shares of common stock for sale in connection with the conversion of NB Financial, MHC, from a mutual holding company to a stock holding company form of organization.

N/A 41M
Aug 08, 2023

S-1/A filing: NB Bancorp, Inc. is offering shares of common stock for sale in connection with the conversion of NB Financial, MHC, from a mutual holding company to a stock holding company form of organization.

N/A 40M
Jul 27, 2023

S-1/A filing: NB Bancorp, Inc. is offering shares of common stock for sale in connection with the conversion of NB Financial, MHC, from a mutual holding company to a stock holding company form of organization.

N/A 40M
Jun 09, 2023

S-1 filing: This S-1 filing details a proposed offering of common stock by NB Bancorp, with Piper Sandler acting as the exclusive marketing agent. The intended net proceeds from the offering are estimated to be between $249.5 million and $389.5 million, depending on the number of shares sold and the offering price. The proceeds will be used for various purposes, including capital contributions to Needham Bank, funding a loan to the ESOP, cash contributions to a charitable foundation, and for general corporate purposes.

N/A 40M
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