NB Bancorp, Inc. Common Stock (NBBK)
Who owns NB Bancorp, Inc. Common Stock (NBBK)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 84.2% of the shares are freely tradable; institutional investors hold 52.5%.
Ownership Structure
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| BlackRock Inc | 7.03 | 3,084,222 | -0.6 | 03/31/2026 |
| Vanguard Group Inc | 5.25 | 2,301,034 | -9.5 | 12/31/2025 |
| Pertento Partners LLP | 5.03 | 2,206,666 | -5.9 | 03/31/2026 |
| Vanguard Capital Management, LLC | 3.89 | 1,703,928 | +0.0 | 03/31/2026 |
| AltraVue Capital, LLC | 2.97 | 1,304,080 | +88.2 | 03/31/2026 |
| State Street Corp | 2.95 | 1,293,538 | +16.1 | 03/31/2026 |
| Geode Capital Management, LLC | 2.51 | 1,098,930 | +13.7 | 03/31/2026 |
| Wellington Management Company LLP | 1.62 | 710,000 | -51.7 | 03/31/2026 |
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| Vanguard Total Stock Mkt Idx Inv | 2.80 | 1,229,005 | +0.0 | 04/30/2026 |
| iShares Russell 2000 ETF | 2.13 | 931,922 | +0.9 | 05/29/2026 |
Largest reported positions according to regulatory filings; stake as a percentage of shares outstanding, change versus the previous filing. Source: fundamentals data.
Insider Transactions
| Date | Person | Role | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| 24. Apr 2026 | Hope Pascucci | Director | Buy | 20,000 | 19.46 | 389,200 |
Reportable transactions by officers and major shareholders from SEC Form 4 filings. "Other" includes things like stock grants and option exercises without a buy/sell character.
View all insider transactions →Data as of: July 31, 2026 · Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q)
Note: pure fact-based analysis, not investment advice and not a solicitation to buy or sell. All figures without guarantee.