NB Bancorp, Inc. Common Stock (NBBK) ownership: Top institutional holder: BlackRock, Inc. ($64.98M). Insider activity: Net Seller (4 buys, 16 sells). SEC EDGAR first-party data.
| Holder | Shares | Market Value | Reported |
|---|---|---|---|
| BlackRock, Inc. | 3084222.00 | $64.98M | 2026-03-31 |
| Pertento Partners LLP | 2206666.00 | $46.49M | 2026-03-31 |
| VANGUARD GROUP INC | 2301034.00 | $45.61M | 2025-12-31 |
| VANGUARD CAPITAL MANAGEMENT LLC | 1703928.00 | $35.90M | 2026-03-31 |
| AltraVue Capital, LLC | 1304080.00 | $27.48M | 2026-03-31 |
| STATE STREET CORP | 1293538.00 | $27.25M | 2026-03-31 |
| GEODE CAPITAL MANAGEMENT, LLC | 1098930.00 | $23.16M | 2026-03-31 |
| WELLINGTON MANAGEMENT GROUP LLP | 710000.00 | $14.96M | 2026-03-31 |
| Insider | Transaction | Value | Date |
|---|---|---|---|
| Sell | null | 2026-05-15 | |
| Sell | null | 2026-05-15 | |
| Sell | null | 2026-05-15 | |
| Sell | null | 2026-05-15 | |
| Sell | null | 2026-05-15 | |
| Sell | null | 2026-05-15 | |
| Sell | null | 2026-05-15 | |
| Sell | null | 2026-05-15 |
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Institutional data from SEC Form 13F. Insider data from SEC Form 4. Congressional data from STOCK Act disclosures. Not personalized investment advice.