Are insiders buying NBBK stock?

Yes — 12 distinct insiders have bought NBBK (NB Bancorp, Inc.) on the open market, including 2 cluster buys where two or more insiders bought within a rolling window. The most recent qualifying activity was Aug 21, 2026.

How much NBBK stock have insiders bought?

Insiders have bought a combined $2.7M of NBBK across 42 open-market purchases, based on SEC Form 4 filings.

What is an insider cluster buy in NBBK?

A cluster buy is two or more distinct NB Bancorp, Inc. insiders — officers, directors, or 10% owners — each buying NBBK on the open market within a rolling window. NBBK has 2 detected cluster buys to date.

Where does this NBBK insider trading data come from?

Every figure is parsed directly from SEC Form 4 filings on EDGAR, and each purchase on this page links back to its original filing document.

NBBK insider buying

2 cluster buys

NB Bancorp, Inc.

When two or more insiders at NB Bancorp, Inc. buy NBBK on the open market around the same time, that clustered conviction is one of the highest-signal patterns in SEC filing data. Below is every cluster we've detected in NBBK plus the full record of qualifying open-market buys, each parsed directly from Form 4 filings and linked back to the source on SEC EDGAR.

Clusters

Distinct insiders

Total bought

$2.7M

Market cap

Unknown

Detected clusters

Aug 20 – Aug 20, 2026
Detected Aug 21, 2026
High conviction2 insiders
Total bought
$47.9K
Market cap
Unknown
Jan 24 – Jan 24, 2025
Detected Jan 24, 2025
2 insiders
Total bought
$928.4K
Market cap
$897.3M

All notable open-market buys in NBBK

Every open-market Form 4 purchase, newest first. Click an insider to see their full buying record across companies.

Date	Insider	Shares	Price	Value	Filing
Aug 20, 2026	CAMPANELLI JOSEPH Pcluster Director, President & CEO, Chairman of the Board	2,000	$21.75	$43.5K	SEC ↗
Aug 20, 2026	Lapointe Jean-Pierrecluster SEVP and CFO	200	$21.80	$4.4K	SEC ↗
Apr 24, 2026	Pascucci Hope Director	10,000	$19.49	$194.9K	SEC ↗
Apr 24, 2026	Pascucci Hope Director	10,000	$19.44	$194.4K	SEC ↗
Mar 19, 2026	CAMPANELLI JOSEPH P Director, President & CEO, Chairman of the Board	2,500	$20.16	$50.4K	SEC ↗
Mar 9, 2026	Lapointe Jean-Pierre SEVP and CFO	1,000	$20.42	$20.4K	SEC ↗
Mar 6, 2026	CAMPANELLI JOSEPH P Director, President & CEO, Chairman of the Board	3,000	$20.77	$62.3K	SEC ↗
Mar 6, 2026	CAMPANELLI JOSEPH P Director, President & CEO, Chairman of the Board	2,000	$20.78	$41.6K	SEC ↗
Dec 19, 2025	EVANGELISTA PAUL A EVP, Dir Spec. Bank. Ctr.	2,000	$20.87	$41.7K	SEC ↗
Oct 28, 2025	Pascucci Hope Director	4,688	$18.07	$84.7K	SEC ↗
Sep 12, 2025	Montgomery Kenneth C. Director	5,000	$18.44	$92.2K	SEC ↗
Aug 11, 2025	Darcey William Director	4,861	$17.30	$84.1K	SEC ↗
Aug 11, 2025	Darcey William Director	139	$17.29	$2.4K	SEC ↗
Jul 25, 2025	EVANGELISTA PAUL A EVP, Dir Spec. Bank. Ctr.	500	$18.39	$9.2K	SEC ↗
Jun 9, 2025	CAMPANELLI JOSEPH P Director, President & CEO, Chairman of the Board	5,000	$16.29	$81.5K	SEC ↗
Jun 9, 2025	EVANGELISTA PAUL A EVP, Dir Spec. Bank. Ctr.	1,000	$16.29	$16.3K	SEC ↗
Jun 9, 2025	CAMPANELLI JOSEPH P Director, President & CEO, Chairman of the Board	1,000	$16.03	$16.0K	SEC ↗
Jun 9, 2025	CAMPANELLI JOSEPH P Director, President & CEO, Chairman of the Board	900	$16.35	$14.7K	SEC ↗
Jun 9, 2025	CAMPANELLI JOSEPH P Director, President & CEO, Chairman of the Board	100	$16.33	$1.6K	SEC ↗
Apr 29, 2025	Orfanello Francis Director	5,000	$17.09	$85.5K	SEC ↗
Mar 18, 2025	EVANGELISTA PAUL A EVP, Dir Spec. Bank. Ctr.	500	$18.74	$9.4K	SEC ↗
Mar 11, 2025	CAMPANELLI JOSEPH P Director, President & CEO, Chairman of the Board	2,000	$17.75	$35.5K	SEC ↗
Jan 24, 2025	Pascucci Hopecluster Director	40,000	$18.53	$741.2K	SEC ↗
Jan 24, 2025	Elliott Mary Susancluster Director	10,000	$18.72	$187.2K	SEC ↗
Jan 24, 2025	Lapointe Jean-Pierre EVP and CFO	900	$18.85	$17.0K	SEC ↗

17 earlier buys hidden — sign in free to see the full history.

NBBK insider buying — FAQ

Are insiders buying NBBK stock?: Yes — 12 distinct insiders have bought NBBK (NB Bancorp, Inc.) on the open market, including 2 cluster buys where two or more insiders bought within a rolling window. The most recent qualifying activity was Aug 21, 2026.
How much NBBK stock have insiders bought?: Insiders have bought a combined $2.7M of NBBK across 42 open-market purchases, based on SEC Form 4 filings.
What is an insider cluster buy in NBBK?: A cluster buy is two or more distinct NB Bancorp, Inc. insiders — officers, directors, or 10% owners — each buying NBBK on the open market within a rolling window. NBBK has 2 detected cluster buys to date.
Where does this NBBK insider trading data come from?: Every figure is parsed directly from SEC Form 4 filings on EDGAR, and each purchase on this page links back to its original filing document.

How we track insider buying in NBBK

We continuously poll SEC EDGAR for new Form 4 filings and parse every open-market purchase (transaction code P). A cluster is recorded when two or more distinct insiders — officers, directors, or 10% owners — each buy NBBK within a rolling window. We track clusters at every company size, from micro-caps to mega-caps. Every figure on this page traces back to an official filing; open any row to jump straight to the source document. What counts as a cluster buy?

This page is informational and reflects public filing data. It is not investment advice or a recommendation regarding NBBK.