InsiderTrades

Form 4 for NBBK NB Bancorp, Inc.

Accepted 2026-03-19 00:00:00 ET · period of report 2026-03-19 · accession 0001437749-26-009077 · SEC index · Original document

Summary rows

Aggregated the way they appear in lists: one row per insider, transaction code and security table.

X Filed Traded Ticker Insider Title Type Price Qty Owned ΔOwn Value
2026-03-19 2026-03-19 NBBK CAMPANELLI JOSEPH P Pres, CEO, Dir, COB P - Purchase $20.16 +2,500 396.7K +0.6% +$50.4K

Purchase Sale Sale after option exercise All abbreviations

Every reported transaction

#TableSecurityDateCodeA/DSharesPriceOwned afterOwnExercise / expiryUnderlyingFootnotes
1 Common Common Stock 2026-03-19 P A 2,500 $20.16 396,661 D — — (F1) Includes shares of restricted stock which vest at a rate of 20% per year commencing on April 24, 2026. (F2) Includes shares of restricted stock which vest at a rate of 33 1/3% per year commencing on February 25, 2027.