NBBK · Insider trading · 13F holders · Congress trades
NB Bancorp, Inc. (NBBK)
Who is buying and selling NBBK: company insiders on SEC Form 4, hedge funds and superinvestors on Form 13F, and members of Congress under the STOCK Act. Every figure links to the filing or page it comes from.
- 13F filers holding
- 8
- Insider buys, 90 days
- $48K
- Insider sales, 90 days
- $46K
- Congress trades, 12 months
- 0
NBBK at a glance
- Between Aug 1, 2026 and Oct 29, 2026, 3 NBBK insiders filed 2 open-market purchases worth $48K and 1 sale worth $46K on SEC Form 4.
- 8 13F filers hold NBBK among their 50 largest positions, worth $89.1M combined. The biggest bets by portfolio weight are Tieton Capital Management, LLC (3.3%), AltraVue Capital, LLC (2.5%) and Pertento Partners LLP (2.2%). In their latest 13Fs, 0 managers opened a new position and 3 added to one.
- No member of Congress has disclosed a trade in NBBK.
- NBBK last closed at $22.56 on Oct 29, 2026.
NBBK insider trading
Between Aug 1, 2026 and Oct 29, 2026, 3 NBBK insiders filed 2 open-market purchases worth $48K and 1 sale worth $46K on SEC Form 4.
| Filed | Insider | Role | Trade | Shares | Price | Value | Form 4 |
|---|---|---|---|---|---|---|---|
| Aug 21, 2026 | Campanelli Joseph P | President & CEO, Director, Chairman of the Board | Buy | 2,000 | $21.75 | $44K | SEC |
| Aug 21, 2026 | Lapointe Jean-Pierre | SEVP and CFO | Buy | 200 | $21.80 | $4K | SEC |
| Aug 18, 2026 | Henkin Kevin | EVP, Chief Credit Officer | Sale | 2,000 | $22.93 | $46K | SEC |
Who owns NBBK? Hedge funds and superinvestors
8 13F filers hold NBBK among their 50 largest positions, worth $89.1M combined. The biggest bets by portfolio weight are Tieton Capital Management, LLC (3.3%), AltraVue Capital, LLC (2.5%) and Pertento Partners LLP (2.2%). In their latest 13Fs, 0 managers opened a new position and 3 added to one.
| Manager | % of portfolio | Value | Shares | Last quarter | 13F |
|---|---|---|---|---|---|
| AltraVue Capital, LLCHedge fund | 2.5% | $35.0M | 1,655,108 | +26.9% shares | Q2 2026 |
| Pertento Partners LLPHedge fund | 2.2% | $31.2M | 1,475,770 | -33.1% shares | Q2 2026 |
| Tieton Capital Management, LLCAsset manager | 3.3% | $11.6M | 546,600 | -1.3% shares | Q2 2026 |
| Legato Capital Management LLCInstitutional asset manager | 0.6% | $7.7M | 366,090 | +32.6% shares | Q2 2026 |
| Oppenheimer & Close, LLCWealth manager | 1.1% | $1.8M | 82,999 | +0.0% shares | Q2 2026 |
| Stilwell Value LLCHedge fund | 0.6% | $1.1M | 50,000 | -23.1% shares | Q2 2026 |
| Raffles Associates LPHedge fund | 0.6% | $673K | 31,874 | +114.3% shares | Q2 2026 |
| Great Oak Capital Partners, LLCWealth manager | 0.0% | $224K | 10,636 | +0.0% shares | Q2 2026 |
Each manager counts with its latest 13F (Q2 2026: 8). Screen NBBK in the grand portfolio →
NBBK stock trades by members of Congress
No member of Congress has disclosed a trade in NBBK.
NBBK questions and answers
Are insiders buying NBBK stock?
Between Aug 1, 2026 and Oct 29, 2026, 3 NBBK insiders filed 2 open-market purchases worth $48K and 1 sale worth $46K on SEC Form 4.
Which hedge funds own NBBK?
8 13F filers hold NBBK among their 50 largest positions, worth $89.1M combined. The biggest bets by portfolio weight are Tieton Capital Management, LLC (3.3%), AltraVue Capital, LLC (2.5%) and Pertento Partners LLP (2.2%). In their latest 13Fs, 0 managers opened a new position and 3 added to one.
Has Congress traded NBBK?
No member of Congress has disclosed a trade in NBBK.
Who is the largest holder of NBBK?
Among 13F filers, AltraVue Capital, LLC reports the largest NBBK position, $35.0M (1,655,108 shares) in its Q2 2026 13F. The biggest bet by portfolio weight is Tieton Capital Management, LLC's: 3.3% of its portfolio.
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