// company-profile
NB Bancorp, Inc.
NBBKExchangeNasdaqSectorSavings Institutions, Not Federally CharteredFilings104Insiders24
// api This NB Bancorp, Inc. insider-trading data is served live by the Form4API insider trading API. Get the same data via API.
// activity-summary
No insider transactions in the last 30 days.
// 90-day insight
Over the last 90 days, NB Bancorp, Inc. insiders bought $495K (18 transactions) and sold $554K (2 transactions).
- Most active insider: CAMPANELLI JOSEPH P with 17 transactions totaling $589K.
- Largest single sale: $483K by CAMPANELLI JOSEPH P on Apr 24, 2026.
Activity skews bullish — buys outpace sales.
Institutional Ownership
Top 13F-HR holders of NB Bancorp, Inc. as of 2026-03-31
Total reported AUM
$453.0M
QoQ change
+22.6%
Reporting period
2026-03-31
#1
Pertento Partners LLP
CIK 1894571
$46.5M
2.2M shares
#2
VANGUARD CAPITAL MANAGEMENT LLC
CIK 2100119
$35.9M
1.7M shares
#3
BlackRock, Inc.
CIK 2012383
$31.5M
1.5M shares
Data source: SEC Form 13F-HR filings. Joined with insider activity above — see who's loading up institutionally while insiders are trading. Full 13F-HR API →
Insider Transactions
Sourced from SEC EDGAR Form 4 filings. Updated hourly.
| Date | Insider | Company | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| May 15, 2026 | CAMPANELLI JOSEPH P | NBBK | Purchase | 400 | $19.18 | $8K |
| May 15, 2026 | CAMPANELLI JOSEPH P | NBBK | Purchase | 767 | $19.18 | $15K |
| May 15, 2026 | CAMPANELLI JOSEPH P | NBBK | Purchase | 253 | $19.20 | $5K |
| May 15, 2026 | CAMPANELLI JOSEPH P | NBBK | Purchase | 100 | $19.20 | $2K |
| May 15, 2026 | CAMPANELLI JOSEPH P | NBBK | Purchase | 500 | $19.19 | $10K |
45 more transactions hidden
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