NBBK
insider transactionsNB Bancorp, Inc. — buys & sells by directors, officers and 10% owners A shareholder owning more than 10% of the company. Must report trades, but usually a weaker signal than an officer or director. (SEC Form 4).
Cluster buy signal: Multiple insiders at the same company buying around the same time — often a stronger signal than a single buy. 2 different insiders made open-market purchases in the last 90 days, totalling $495.4K.
Net shares · 90d
+25.5K
25.5K buy · 0 sell
Net value · 90d
$495.4K
$495.4K in · $0 out
Sentiment · 90d
Net buying
100% buying · 0% selling
Open-market trades · 90d
18
25.5K buy · 0 sell
Net buy / sell volume
Not enough data to chart yet.
Tap or hover the chart for daily net volume. Green = net buying, red = net selling.
All transactions
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Buy·P
President & CEO
$4.7K
247 sh · $19.21
Own +0%
-
Buy·P
President & CEO
$1.9K
100 sh · $19.21
Own +0%
-
Buy·P
President & CEO
$4.9K
253 sh · $19.20
Own +0%
-
Buy·P
President & CEO
$9.6K
500 sh · $19.19
Own +0%
-
Buy·P
President & CEO
$14.7K
767 sh · $19.18
Own +0%
-
Buy·P
President & CEO
$1.9K
100 sh · $19.18
Own +0%
-
Buy·P
President & CEO
$7.7K
400 sh · $19.18
Own +0%
-
Buy·P
President & CEO
$2.5K
133 sh · $19.17
Own +0%
-
Buy·P
President & CEO
$9.6K
500 sh · $19.16
Own +0%
-
Buy·P
Director
$194.9K
10.0K sh · $19.49
Own +8%
-
Buy·P
Director
$194.4K
10.0K sh · $19.44
Own +8%
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Other·F
Director
$97.5K
4.9K sh · $19.82
Own -6%
-
Other·F
Director
$97.5K
4.9K sh · $19.82
Own -6%
-
Other·F
SEVP and COO
$71.1K
3.6K sh · $19.82
Own -5%
-
Other·F
Director
$99.4K
5.0K sh · $19.82
Own -6%
-
Other·F
Director
$82.3K
4.2K sh · $19.82
Own -4%
-
Other·F
Director
$97.5K
4.9K sh · $19.82
Own -6%
-
Other·F
Director
$97.5K
4.9K sh · $19.82
Own -6%
-
Buy·P
President & CEO
$9.8K
500 sh · $19.63
Own +0%
-
Buy·P
President & CEO
$1.9K
100 sh · $19.47
Own +0%
-
Buy·P
President & CEO
$3.5K
178 sh · $19.46
Own +0%
-
Buy·P
President & CEO
$14.0K
722 sh · $19.45
Own +0%
-
Buy·P
President & CEO
$9.7K
500 sh · $19.37
Own +0%
-
Buy·P
President & CEO
$3.5K
180 sh · $19.34
Own +0%
-
Buy·P
President & CEO
$6.2K
320 sh · $19.33
Own +0%
-
Other·F
President & CEO
$483.0K
24.4K sh · $19.82
Own -6%
| Date▾ | Insider | Type | Shares | Value |
|---|---|---|---|---|
| May 15, 2026 | Joseph P Campanelli KEY | Buy P | 247 | $4.7K |
| May 15, 2026 | Joseph P Campanelli KEY | Buy P | 100 | $1.9K |
| May 15, 2026 | Joseph P Campanelli KEY | Buy P | 253 | $4.9K |
| May 15, 2026 | Joseph P Campanelli KEY | Buy P | 500 | $9.6K |
| May 15, 2026 | Joseph P Campanelli KEY | Buy P | 767 | $14.7K |
| May 15, 2026 | Joseph P Campanelli KEY | Buy P | 100 | $1.9K |
| May 15, 2026 | Joseph P Campanelli KEY | Buy P | 400 | $7.7K |
| May 15, 2026 | Joseph P Campanelli KEY | Buy P | 133 | $2.5K |
| May 15, 2026 | Joseph P Campanelli KEY | Buy P | 500 | $9.6K |
| Apr 24, 2026 | Hope Pascucci | Buy P | 10.0K | $194.9K |
| Apr 24, 2026 | Hope Pascucci | Buy P | 10.0K | $194.4K |
| Apr 24, 2026 | Mark Whalen | Other F | 4.9K | $97.5K |
| Apr 24, 2026 | Joseph R Nolan JR | Other F | 4.9K | $97.5K |
| Apr 24, 2026 | Christine Roberts | Other F | 3.6K | $71.1K |
| Apr 24, 2026 | Kenneth C. Montgomery | Other F | 5.0K | $99.4K |
| Apr 24, 2026 | Christopher R. Lynch | Other F | 4.2K | $82.3K |
| Apr 24, 2026 | Angela Jackson | Other F | 4.9K | $97.5K |
| Apr 24, 2026 | William Darcey | Other F | 4.9K | $97.5K |
| Apr 24, 2026 | Joseph P Campanelli KEY | Buy P | 500 | $9.8K |
| Apr 24, 2026 | Joseph P Campanelli KEY | Buy P | 100 | $1.9K |
| Apr 24, 2026 | Joseph P Campanelli KEY | Buy P | 178 | $3.5K |
| Apr 24, 2026 | Joseph P Campanelli KEY | Buy P | 722 | $14.0K |
| Apr 24, 2026 | Joseph P Campanelli KEY | Buy P | 500 | $9.7K |
| Apr 24, 2026 | Joseph P Campanelli KEY | Buy P | 180 | $3.5K |
| Apr 24, 2026 | Joseph P Campanelli KEY | Buy P | 320 | $6.2K |
| Apr 24, 2026 | Joseph P Campanelli KEY | Other F | 24.4K | $483.0K |
About NBBK insider trading
This page tracks insider transactions for NB Bancorp, Inc. (NBBK) reported to the U.S. Securities and Exchange Commission on Form 4. Corporate insiders — directors, executive officers and beneficial owners of more than 10% of the stock — must disclose their trades within two business days. Open-market purchases (code P) and sales (code S) made at the insider's discretion are the most-watched opportunistic signals, while awards (A), option exercises (M) and tax-withholding (F) reflect compensation rather than conviction. Trades marked 10b5-1 were made under a pre-arranged plan and are considered routine. A cluster buy — several insiders buying within a short window — is historically a stronger bullish indicator than any single trade.