WAVEMAN · COMPANY

NBBK · Nb Bancorp, Inc.

LIVE

TEAM-2.62% 13F +440META+1.00% 13F +2,694RCG+0.35% CLUSTERUTHR-0.54% 13F +425CRWV+5.68% 13F +694CRM-1.97% 13F +1,019CVNA+1.58% 13F +795TPL-1.11% 13F +444NET-1.96% 13F +711MSTR-1.39% 13F +527DELL+1.50% 13F +1,204CRWD-0.87% 13F +1,383ANET+1.22% 13F +1,324COIN-4.18% 13F +475TEAM-2.62% 13F +440META+1.00% 13F +2,694RCG+0.35% CLUSTERUTHR-0.54% 13F +425CRWV+5.68% 13F +694CRM-1.97% 13F +1,019CVNA+1.58% 13F +795TPL-1.11% 13F +444NET-1.96% 13F +711MSTR-1.39% 13F +527DELL+1.50% 13F +1,204CRWD-0.87% 13F +1,383ANET+1.22% 13F +1,324COIN-4.18% 13F +475

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NBBK

Name: NB Bancorp, Inc. (NBBK) insider trading and ownership data
Creator: WaveMan
License: https://wave-man.com/terms

NB Bancorp, Inc.

BANKS · SAVINGS INSTITUTIONS, NOT FEDERALLY CHARTERED · CIK 0001979330

CLUSTER · 3 INSIDERSC-SUITE BUYING · 2☆ WATCH

INSIDER NET · 180D

$547.9K

open-market buys minus sells, Form 4 codes P and S

INSIDER BUYERS · 180D

CONGRESS BUYERS · 1Y

FUNDS ADDED · QTR

13F, latest reported quarter

REVENUE GROWTH

XBRL, annual

NET MARGIN

SEVEN FACTS, RANKED AGAINST THE SECTOR · RANK IS NOT A FORECAST

INSIDERS

net +$547.9K over 180 days

+$2.0K over 90 days

more than 94% of Banks

CONGRESS

no member of Congress has reported trading it

FUNDS

82 funds added or opened last quarter

below 59% of Banks

REVENUE

no revenue reported in any filing

MARGIN

no margin: this company reports no revenue to divide by

BUYBACKS

$46.3M repurchased, FY to 2026-06-30

more than 76% of Banks

SHORT

3.8% of shares outstanding short · 4.0 days to cover · settled 2026-07-31

more than 75% of Banks

THE SITUATION · EVERY LINE IS ONE RULE OVER ONE DATASET

3 insiders independently bought a net $547.9K — no planned sales are queued against it.

82 funds added or opened positions in the latest 13F quarter, of 162 holders.

The year, with the filings on it

Total return indexed to 100 over the last 12 months · every marker is a federal filing, placed at its date — hover any marker for the detail

TOTAL 12M RETURN +24.1%

+24.1%12M

INSIDER BUYINSIDER SELL

INDEXED RETURN, DIVIDEND-ADJUSTED — NOT A PRICE CHART · LARGE TRADES DRAWN FIRST WHEN A NAME FILES HEAVILY

Live price

Daily candles from TradingView, on their licence — no filings are marked on this one

WHY THIS NAME IS ON THE DESK

3 insiders reported buying shares.

The record shows a net $547.9K bought by insiders over 180 days, 82 funds added last quarter. Every figure is a federal filing, dated the day it became public.

Backtest this pattern Open the screener

Same sector, ranked by filing activity

Sector from the SEC's own SIC classification

UMBF BWFG PEBO PB FMBM GABC NEWT PCB DCOM ISBA WSBF JMSB

Insider transactions

Form 4 purchases and sales (codes P and S) — grants, option exercises and preferred conversions excluded

Over the last 180 days, NB Bancorp, Inc. insiders bought a net $547.9K of stock across 86 Form 4 purchases and sales, with 3 insider(s) buying. Source: SEC Form 4 filings, as of 2026-09-06.

INSIDER

FILED

VALUE

Lapointe Jean-Pierre

SEVP and CFO

BUY

2026-08-20

200.0

$4.4K

CAMPANELLI JOSEPH P

President & CEO

BUY

2026-08-20

2,000.0

$43.5K

Henkin Kevin

EVP, Chief Credit Officer

SELL

2026-08-14

2,000.0

$45.9K

CAMPANELLI JOSEPH P

President & CEO

BUY

2026-05-15

247.0

$4.7K

CAMPANELLI JOSEPH P

President & CEO

BUY

2026-05-15

100.0

$1.9K

86 TRANSACTIONS ON RECORD

Showing the most recent few. Create a free account to see 81 more transactions on record, the cross-source screener and CSV export. We store only your email address, and there is no password to create.

Institutional holders

13F · holdings as of the latest quarter funds have reported

BlackRock, Inc.

3,331,544.0 sh

$70.4M

VANGUARD CAPITAL MANAGEMENT LLC

1,670,835.0 sh

$35.3M

AltraVue Capital, LLC

1,655,108.0 sh

$35.0M

Pertento Partners LLP

1,475,770.0 sh

$31.2M

STATE STREET CORP

1,471,766.0 sh

$31.1M

SCHEDULE 13D/G

No 5%+ ownership filings

Nobody has crossed 5% with a filing obligation. Absence is a fact here, not missing data.

FORM 144

No planned-sale notices

No insider has notified an intent to sell. This is the panel to watch after a run-up.

Fund concentration

N-PORT · funds ranked by how much of THEMSELVES they put in this stock — the conviction number 13F cannot show

Hennessy Small Cap Financial Fund

$3.5M POSITION · AS OF 2026-04-30

4.9%

First Trust Dow Jones Select MicroCap Index Fund

$2.6M POSITION · AS OF 2026-03-31

1.2%

ACUITAS US MICROCAP FUND

$626.4K POSITION · AS OF 2026-03-31

0.6%

AUER GROWTH

$341.4K POSITION · AS OF 2026-02-28

0.5%

First Trust NASDAQ ABA Community Bank Index Fund

$340.0K POSITION · AS OF 2026-03-31

0.5%

Federated Hermes MDT Small Cap Value Fund f/k/a Federated Hermes Clover Small Value Fund

$582.6K POSITION · AS OF 2026-03-31

0.4%

SEC N-PORT, MONTHLY WITH A ~60-DAY PUBLIC LAG · FUNDS ≥ $10M · % = SHARE OF THE FUND'S OWN BOOK

Fundamentals

Annual figures from XBRL filings · pick a past date to see them exactly as the market knew them then — restatements and all

	2025-12	2024-12	2023-12	2022-12
NET INCOME	$50.3M	$42.1M	$9.8M	$30.1M
EPS (DILUTED)	1.34	1.07	0.23	—
OPERATING CASH FLOW	$60.8M	$43.2M	$52.9M	$39.7M
BUYBACKS	$77.1M	—	—	—
DIVIDENDS PAID	$5.6M	—	—	—

SEC XBRL · FISCAL-YEAR PERIODS · AS KNOWN ON 2026-09-06 · NOBODY ELSE SHOWS FUNDAMENTALS AS OF A PAST DATE