InsiderTrades

Form 4 for NBBK NB Bancorp, Inc.

Accepted 2026-04-27 14:50:20 ET · period of report 2026-04-24 · accession 0001437749-26-013437 · 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
2026-04-27 14:50 2026-04-24 NBBK Whalen Mark Dir F - Tax $19.82 -4,918 72.7K -6% -$97.5K

Purchase Sale Sale after option exercise All abbreviations

Every reported transaction

#TableSecurityDateCodeA/DSharesPriceOwned afterOwnExercise / expiryUnderlyingFootnotes
1 Common Common Stock 2026-04-24 F D 4,918 $19.82 72,721 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 100% on January 2, 2027.