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Nasdaq · CIK 0001979330

NBBK NB Bancorp, Inc.

Insider trading from SEC Form 4. Last filing May 18, 2026. Close $22.12 on Oct 9, 2026, +33% from the 52-week low and -5% from the high.

NB Bancorp, Inc. (NBBK) has 62 SEC Form 4 filings on file from 22 insiders, the latest filed on May 18, 2026. No insider bought or sold on the open market in the last 90 days; rows filed in that time are grants, exercises, tax withholding and other transactions that carry no view on the price.

18 open-market trades have been scored at NBBK. The newest: Joseph P Campanelli (President & CEO) bought $58k of stock on May 15, 2026, filed May 18, 2026, scored 36 (weak). The largest of the 18 shown: Mary Susan Elliott (director) bought $218k on Jan 24, 2025, scored 30 (weak). 2 insiders bought within 14 days of each other around Mar 6, 2026.

NBBK closed at $22.12 on Oct 9, 2026, 33% above its 52-week low and 5% below its 52-week high.

Last 90 days

Net insider value
$0
no open-market trades
Buys
0
$0 by 0 insiders
Sells
0
$0 by 0 insiders
Insiders on file
22
with a Form 4 at this company

Price and insider trades, last year

NBBKOct 9, 2026 · close 22.12

Daily candles, adjusted for splits and dividends. Green arrows are insider buys, red are sells, sized by value. Click a marked bar to open the signal.Charts by TradingView Lightweight Charts™

Signals

Open-market buys and sells at NB Bancorp, Inc., scored.

ScoreInsiderValueHoldingsPrice contextFiled
36WeakJoseph P Campanelli
President & CEO
buy
$58k
3,000 shares
+1%+21% from low-15% from high
32WeakJoseph P Campanelli
President & CEO
buy
$49k
2,500 shares
+1%+25% from low-12% from high
46ModerateJoseph P Campanelli
President & CEO
buy
$104k
5,000 shares
+11%+35% from low-6% from high
40ModerateJoseph P Campanelli
President & CEO
buy
$50k
2,500 shares
+1%+32% from low-8% from high
46ModerateJoseph P Campanelli
President & CEO
buy
$104k
5,000 shares
+11%+35% from low-6% from high
25WeakJean-Pierre Lapointe
SEVP and CFO
buy
$20k
1,000 shares
+1%+34% from low-7% from high
30WeakMary Susan Elliott
director
buy
$218k
11,434 shares
+11%+14% from low-9% from high
24WeakPaul A Evangelista
EVP, Dir Spec. Bank. Ctr.
buy
$42k
2,000 shares
+8%+35% from low-1% from high
24WeakHope Pascucci
director
buy
$85k
4,688 shares
+4%+15% from low-13% from high
27WeakKenneth C. Montgomery
director
buy
$92k
5,000 shares
+7%+18% from low-11% from high
31WeakWilliam Darcey
director
buy
$86k
5,000 shares
+7%+11% from low-17% from high
20WeakPaul A Evangelista
EVP, Dir Spec. Bank. Ctr.
buy
$9,195
500 shares
+2%+17% from low-12% from high
62NotableJoseph P Campanelli
President & CEO
buy
$114k
7,000 shares
+2%+3% from low-23% from high
42ModeratePaul A Evangelista
EVP, Dir Spec. Bank. Ctr.
buy
$16k
1,000 shares
+4%+3% from low-23% from high
28WeakFrancis Orfanello
director
buy
$85k
5,000 shares
+4%+10% from low-17% from high
23WeakPaul A Evangelista
EVP, Dir Spec. Bank. Ctr.
buy
$9,370
500 shares
+2%-
39WeakJoseph P Campanelli
President & CEO
buy
$36k
2,000 shares
+4%-
15WeakPaul A Evangelista
EVP, Dir Spec. Bank. Ctr.
buy
$9,955
500 shares
+2%-

Transactions

The newest 50 of 84 rows filed, every code.

DateInsiderTransactionSharesPriceValueHoldings afterFiled
May 15, 2026Joseph P Campanelli
President & CEO
POpen-market purchase
Common Stock
+500$19.16$9,580375,290May 18, 2026
May 15, 2026Joseph P Campanelli
President & CEO
POpen-market purchase
Common Stock
+133$19.17$2,550375,423May 18, 2026
May 15, 2026Joseph P Campanelli
President & CEO
POpen-market purchase
Common Stock
+400$19.18$7,670375,823May 18, 2026
May 15, 2026Joseph P Campanelli
President & CEO
POpen-market purchase
Common Stock
+100$19.18$1,918375,923May 18, 2026
May 15, 2026Joseph P Campanelli
President & CEO
POpen-market purchase
Common Stock
+767$19.18$15k376,690May 18, 2026
May 15, 2026Joseph P Campanelli
President & CEO
POpen-market purchase
Common Stock
+500$19.19$9,595377,190May 18, 2026
May 15, 2026Joseph P Campanelli
President & CEO
POpen-market purchase
Common Stock
+253$19.20$4,858377,443May 18, 2026
May 15, 2026Joseph P Campanelli
President & CEO
POpen-market purchase
Common Stock
+100$19.21$1,921377,543May 18, 2026
May 15, 2026Joseph P Campanelli
President & CEO
POpen-market purchase
Common Stock
+247$19.21$4,745377,790May 18, 2026
Apr 24, 2026William Darcey
director
FTax withholding
Common Stock
-4,918$19.82$97k77,721Apr 27, 2026
Apr 24, 2026Angela Jackson
director
FTax withholding
Common Stock
-4,918$19.82$97k76,337Apr 27, 2026
Apr 24, 2026Joseph P Campanelli
President & CEO
FTax withholding
Common Stock
-24,371$19.82$483k372,290Apr 27, 2026
Apr 24, 2026Joseph P Campanelli
President & CEO
POpen-market purchase
Common Stock
+320$19.33$6,186372,610Apr 27, 2026
Apr 24, 2026Joseph P Campanelli
President & CEO
POpen-market purchase
Common Stock
+180$19.34$3,481372,790Apr 27, 2026
Apr 24, 2026Joseph P Campanelli
President & CEO
POpen-market purchase
Common Stock
+500$19.37$9,685373,290Apr 27, 2026
Apr 24, 2026Joseph P Campanelli
President & CEO
POpen-market purchase
Common Stock
+722$19.45$14k374,012Apr 27, 2026
Apr 24, 2026Joseph P Campanelli
President & CEO
POpen-market purchase
Common Stock
+178$19.46$3,464374,190Apr 27, 2026
Apr 24, 2026Joseph P Campanelli
President & CEO
POpen-market purchase
Common Stock
+100$19.47$1,947374,290Apr 27, 2026
Apr 24, 2026Joseph P Campanelli
President & CEO
POpen-market purchase
Common Stock
+500$19.63$9,813374,790Apr 27, 2026
Mar 9, 2026Matthew G Schulman
EVP, President Needham Prv Bnk
AGrant or award
Common Stock
+6,980$0.00$06,980Mar 30, 2026
Mar 6, 2026Joseph P Campanelli
President & CEO
POpen-market purchase
Common Stockindirect: By IRA
+2,000$20.78$42k47,000Mar 20, 2026
Mar 6, 2026Joseph P Campanelli
President & CEO
POpen-market purchase
Common Stockindirect: As trustee for trust
+3,000$20.77$62k3,000Mar 20, 2026
Mar 19, 2026Joseph P Campanelli
President & CEO
POpen-market purchase
Common Stock
+2,500$20.16$50k396,661Mar 19, 2026
Mar 9, 2026Jean-Pierre Lapointe
SEVP and CFO
POpen-market purchase
Common Stock
+1,000$20.42$20k110,331Mar 9, 2026
Mar 6, 2026Joseph P Campanelli
President & CEO
POpen-market purchase
Common Stockindirect: By IRA
+2,000$20.78$42k47,000Mar 9, 2026
Mar 6, 2026Joseph P Campanelli
President & CEO
POpen-market purchase
Common Stockindirect: As trustee for trust
+3,000$20.77$62k3,000Mar 9, 2026
Feb 25, 2026Stephanie Maiona
EVP, Dir CRE Banking
AGrant or award
Common Stock
+6,874$0.00$06,874Feb 27, 2026
Feb 25, 2026Christine Roberts
SEVP and COO
AGrant or award
Common Stock
+13,749$0.00$074,670Feb 27, 2026
Feb 25, 2026Matthew Richardson
EVP, Treasury & Cash Mgmt Svcs
AGrant or award
Common Stock
+13,749$0.00$013,749Feb 27, 2026
Feb 25, 2026James J. White
EVP, Chief Administrative Offc
AGrant or award
Common Stock
+6,874$0.00$016,874Feb 27, 2026
Feb 25, 2026Joseph P Campanelli
President & CEO
AGrant or award
Common Stock
+63,015$0.00$0394,161Feb 27, 2026
Feb 25, 2026James B. Daley
EVP - Dir C&I Banking
AGrant or award
Common Stock
+6,874$0.00$06,874Feb 27, 2026
Feb 25, 2026Paul A Evangelista
EVP, Dir Spec. Bank. Ctr.
AGrant or award
Common Stock
+6,874$0.00$033,440Feb 27, 2026
Feb 25, 2026Kevin Henkin
EVP, Chief Credit Officer
AGrant or award
Common Stock
+6,874$0.00$08,874Feb 27, 2026
Feb 25, 2026Jean-Pierre Lapointe
SEVP and CFO
AGrant or award
Common Stock
+13,749$0.00$0109,331Feb 27, 2026
Jan 24, 2025Mary Susan Elliott
director
POpen-market purchase
Common Stock
+10,000$18.72$187k115,761Jan 30, 2026
May 2, 2025Mary Susan Elliott
director
POpen-market purchase
Common Stockindirect: By Spouse
+1,434$21.39$31k1,434Jan 30, 2026
Jan 2, 2026Paul J. Ayoub
director
AGrant or award
Common Stock
+7,205$0.00$082,512Jan 6, 2026
Jan 2, 2026William Darcey
director
AGrant or award
Common Stock
+2,402$0.00$082,639Jan 6, 2026
Jan 2, 2026Mary Susan Elliott
director
AGrant or award
Common Stock
+5,524$0.00$0105,761Jan 6, 2026
Jan 2, 2026Angela Jackson
director
AGrant or award
Common Stock
+2,402$0.00$081,255Jan 6, 2026
Jan 2, 2026Christopher R. Lynch
director
AGrant or award
Common Stock
+7,685$0.00$096,922Jan 6, 2026
Jan 2, 2026Kenneth C. Montgomery
director
AGrant or award
Common Stock
+4,803$0.00$085,140Jan 6, 2026
Jan 2, 2026Francis Orfanello
director
AGrant or award
Common Stock
+5,403$0.00$0135,640Jan 6, 2026
Jan 2, 2026Hope Pascucci
director
AGrant or award
Common Stock
+2,402$0.00$0122,402Jan 6, 2026
Jan 2, 2026Muhammad Raza
director
AGrant or award
Common Stock
+2,402$0.00$077,639Jan 6, 2026
Jan 2, 2026Joseph R Nolan Jr
director
AGrant or award
Common Stock
+2,402$0.00$087,739Jan 6, 2026
Jan 2, 2026Mark Whalen
director
AGrant or award
Common Stock
+2,402$0.00$077,639Jan 6, 2026
Jan 2, 2026Joseph B Reilly
director
AGrant or award
Common Stock
+2,402$0.00$014,414Jan 6, 2026
Dec 19, 2025Paul A Evangelista
EVP, Dir Spec. Bank. Ctr.
POpen-market purchase
Common Stock
+2,000$20.87$42k26,566Dec 19, 2025
50 of 84 rows shown.

Insiders

Everyone who has filed a Form 4 here.

Questions about NBBK

Answered from the filings on this page, as of the latest one.

Are insiders buying NBBK?

No. In the last 90 days no insider at NB Bancorp, Inc. bought or sold shares on the open market according to SEC Form 4 filings. The rows on file from that period are grants, exercises, tax withholding or other transactions, which carry no view on the price.

Who was the last insider to trade NBBK on the open market?

Joseph P Campanelli (President & CEO) bought $58k of NBBK on May 15, 2026 and filed the Form 4 on May 18, 2026. InsiderTell scored 36 (weak).

How many insiders file Form 4 at NB Bancorp, Inc.?

22 people have filed a Form 4 at NB Bancorp, Inc., among them Paul J. Ayoub (director), Joseph P Campanelli (President & CEO), James B. Daley (EVP - Dir C&I Banking). Officers, directors and holders of more than 10% of a share class must report their trades within two business days.

Not investment advice. Scores and forward returns are decision support built from public SEC filings and past prices; they describe what happened after comparable filings, not what will happen after this one. Do your own research and size your risk.