NB Bancorp, Inc. Common Stock (NBBK) ownership: Needham Bank Employee Stock Ownership Plan 13% · institutions 46% · index and ETF funds 8% (13F 2026-03-31). Insider activity, 90 days: Insiders bought (1 sales, 2 open-market buys). SEC EDGAR first-party data.
| Holder | Shares | Market Value | % Outstanding | Reported |
|---|---|---|---|---|
| BlackRock | 3084222.00 | $64.98M | 7.0% | 2026-03-31 |
| Vanguard | 2400043.00 | $50.57M | 5.5% | 2026-03-31 |
| Pertento Partners LLP | 2206666.00 | $46.49M | 5.0% | 2026-03-31 |
| AltraVue Capital, LLC | 1304080.00 | $27.48M | 3.0% | 2026-03-31 |
| State Street | 1293538.00 | $27.25M | 3.0% | 2026-03-31 |
| Geode Capital Management | 1098930.00 | $23.16M | 2.5% | 2026-03-31 |
| Wellington Management | 710000.00 | $14.96M | 1.6% | 2026-03-31 |
| Goldman Sachs | 691668.00 | $14.57M | 1.6% | 2026-03-31 |
| Insider | Transaction | Value | Date |
|---|---|---|---|
| Buy | null | 2026-08-20 | |
| Buy | null | 2026-08-20 | |
| Sell | null | 2026-08-14 | |
| Sell | null | 2026-05-15 | |
| Buy | 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.