Stock Trading Canary

United States · SEC Form 4 · Snapshot date: 2026-10-19 · Built: 2026-10-19 · 中文

← United States · Coverage record

US · SEC FORM 4

NB Bancorp, Inc.

NBBK · Nasdaq · CIK 0001979330 · Financial Services · Banks—Regional

INSIDER SIGNAL

61.3 / 100

3 buyers · 20 purchase transaction lines · $543.3K gross purchase

WHY THIS SIGNAL?

Buyer breadthModerate
Purchase sizeModerate
RoleModerate
RecencyLow
ConvictionStrong
Score anatomy

Each bar shows the contribution to the current score; the weights and formula stay unchanged.

Cluster+21.0 / 35
Purchase size+14.5 / 25
Role+13.0 / 20
Recency+3.7 / 10
Conviction+9.2 / 10

What is holding the score back?

  • ⚠ Cluster breadth is moderate · 3 insider(s), not 4+
  • ⚠ Role scores low · most senior buyer: President & CEO (CEO, chair and 10% owners score lowest)
  • ⚠ Purchase activity is becoming less recent

Purchase-size comments are relative to the model scale. Average daily volume is a separate market-context diagnostic.

US-v1.2 ranks qualifying equity purchases under the current 180-day rules. The score is a research priority, not a return forecast or probability. Backtests have not shown that a higher US score is followed by better returns.

Purchase breadth & concentration

QUALIFYING BUYERS3
PURCHASE CONCENTRATION72%Largest buyer: Pascucci Hope · $389.3K
CLUSTER BUYING · 15D2 insidersPeak activity: 2026-04-24–2026-04-24

Roles in the peak window: Director, President & CEO. Concentration uses priced qualifying P lines only and does not change the saved score.

Insider activity timeline

Owner lanes show the latest 180 days. Symbol shape identifies the transaction type; sales remain context only.

AprMayJunJulAugSepOct
CAMPANELLI JOSEPH PPresident & CEO
○●●●
Darcey WilliamDirector
○
Jackson AngelaDirector
○
Whalen MarkDirector
○
NOLAN JOSEPH R JRDirector
○
Montgomery Kenneth C.Director
○
● Purchase▼ Sale○ Other

Showing the six most active owners; 5 additional owner(s) remain in Form 4 evidence.

SIGNAL HISTORY

61.3 / 100

Latest recorded score

→ +0.0 ptsversus the previous recorded snapshot
  1. 61.7
  2. 61.6
  3. 61.5
  4. 61.3
  5. 61.3

Only scores saved when a full US scoring run completed are shown; gaps are not reconstructed.

Recent Form 4 activity

28Purchases
1Sales
32Other Form 4 lines
43SEC filings · 365 days
BUYING20 qualifying P line(s) · 180 days
SELLING1 sale line(s) · context only
OTHER8 exercise / withholding / award / gift / other lines
10b5-1 / PLANNEDNot assessed

P is an open-market or private purchase. S is a sale. M, F, A and G usually describe exercises, tax withholding, awards and gifts. These categories remain visually separate.

Market context

Market context provides additional background on recent price performance and risk. It does not affect the Insider Signal.

Price performance

1M
-3.3%
3M
+5.2%
6M
-1.2%
12M
+26.5%

Volatility & liquidity

Volatility
27.2%
Beta
—
Avg daily value
USD 6.8M

Valuation

Market cap
USD 969.3M
P/E
19.3×

Fundamentals

Profit margin
—
ROE
5.9%
Industry
Banks—Regional

Market data

Price data up to: 2026-10-11 · Price source: OpenBB/yfinance; volume from price cache (yfinance) · From SEC filings: Market cap, P/E, ROE · Fiscal year ended: 2025-12-31 · Market cap is the shares outstanding stated on the filing cover multiplied by the latest close. Share count date: 2026-07-31 · Status: PASS

Short interest

Short interest is external context reported to FINRA by broker-dealers. It does not affect the Insider Signal.

Shares short
1,806,942
Previous report
1,684,193
Avg daily volume
278,691
Days to cover
6.5

FINRA settlement date: 2026-09-30 · Captured 2026-10-12 · FINRA equity short interest ↗. A share count, published about a week after each of two settlement dates a month; not a percentage of shares outstanding.

Historical equity purchases

Qualifying code P transactions in the local Form 4 history, including purchases outside the current signal window.

Transaction dateReporting ownerTypeSecuritySharesAvg. priceApprox. valueSource
2026-08-20Lapointe Jean-PierrePurchase (P)Common Stock200USD 21.80USD 4,360SEC filing ↗
2026-08-20CAMPANELLI JOSEPH PPurchase (P)Common Stock2,000USD 21.75USD 43,500SEC filing ↗
2026-05-15CAMPANELLI JOSEPH PPurchase (P)Common Stock3,000USD 19.18USD 57,549SEC filing ↗
2026-04-24CAMPANELLI JOSEPH PPurchase (P)Common Stock2,500USD 19.45USD 48,621SEC filing ↗
2026-04-24Pascucci HopePurchase (P)Common Stock20,000USD 19.46USD 389,300SEC filing ↗
2026-03-19CAMPANELLI JOSEPH PPurchase (P)Common Stock2,500USD 20.16USD 50,400SEC filing ↗
2026-03-09Lapointe Jean-PierrePurchase (P)Common Stock1,000USD 20.42USD 20,420SEC filing ↗
2026-03-06CAMPANELLI JOSEPH PPurchase (P)Common Stock5,000USD 20.77USD 103,870SEC filing ↗
2026-03-06CAMPANELLI JOSEPH PPurchase (P)Common Stock5,000USD 20.77USD 103,870SEC filing ↗
2025-12-19EVANGELISTA PAUL APurchase (P)Common Stock2,000USD 20.87USD 41,740SEC filing ↗
2025-10-28Pascucci HopePurchase (P)Common Stock4,688USD 18.07USD 84,712SEC filing ↗
2025-09-12Montgomery Kenneth C.Purchase (P)Common Stock5,000USD 18.44USD 92,200SEC filing ↗
2025-08-11Darcey WilliamPurchase (P)Common Stock5,000USD 17.30USD 86,499SEC filing ↗
2025-07-25EVANGELISTA PAUL APurchase (P)Common Stock500USD 18.39USD 9,195SEC filing ↗
2025-06-09EVANGELISTA PAUL APurchase (P)Common Stock1,000USD 16.29USD 16,290SEC filing ↗

Form 4 evidence

61 transaction lines in the latest 365-day window; 138 in local history.

DateOwnerTypeSecuritySharesAvg. priceApprox. valueSource
2026-08-20Lapointe Jean-PierrePurchase (P)Common Stock200USD 21.80USD 4,360SEC filing ↗
2026-08-20CAMPANELLI JOSEPH PPurchase (P)Common Stock2,000USD 21.75USD 43,500SEC filing ↗
2026-08-14Henkin KevinSale (S)Common Stock2,000USD 22.93USD 45,860SEC filing ↗
Show recent Form 4 evidence (30 grouped rows)
DateOwnerTypeSecuritySharesAvg. priceApprox. valueSource
2026-08-20Lapointe Jean-PierrePurchase (P)Common Stock200USD 21.80USD 4,360SEC filing ↗
2026-08-20CAMPANELLI JOSEPH PPurchase (P)Common Stock2,000USD 21.75USD 43,500SEC filing ↗
2026-08-14Henkin KevinSale (S)Common Stock2,000USD 22.93USD 45,860SEC filing ↗
2026-05-15CAMPANELLI JOSEPH PPurchase (P)Common Stock3,000USD 19.18USD 57,549SEC filing ↗
2026-04-24Whalen MarkTax withholding (F)Common Stock4,918USD 19.82USD 97,475SEC filing ↗
2026-04-24Roberts ChristineTax withholding (F)Common Stock3,589USD 19.82USD 71,134SEC filing ↗
2026-04-24NOLAN JOSEPH R JRTax withholding (F)Common Stock4,918USD 19.82USD 97,475SEC filing ↗
2026-04-24Montgomery Kenneth C.Tax withholding (F)Common Stock5,015USD 19.82USD 99,397SEC filing ↗
2026-04-24Lynch Christopher R.Tax withholding (F)Common Stock4,150USD 19.82USD 82,253SEC filing ↗
2026-04-24Jackson AngelaTax withholding (F)Common Stock4,918USD 19.82USD 97,475SEC filing ↗
2026-04-24Darcey WilliamTax withholding (F)Common Stock4,918USD 19.82USD 97,475SEC filing ↗
2026-04-24CAMPANELLI JOSEPH PPurchase (P)Common Stock2,500USD 19.45USD 48,621SEC filing ↗
2026-04-24CAMPANELLI JOSEPH PTax withholding (F)Common Stock24,371USD 19.82USD 483,033SEC filing ↗
2026-04-24Pascucci HopePurchase (P)Common Stock20,000USD 19.46USD 389,300SEC filing ↗
2026-03-19CAMPANELLI JOSEPH PPurchase (P)Common Stock2,500USD 20.16USD 50,400SEC filing ↗
2026-03-09Schulman Matthew GAward / grant (A)Common Stock6,980USD 0.00USD 0SEC filing ↗
2026-03-09Lapointe Jean-PierrePurchase (P)Common Stock1,000USD 20.42USD 20,420SEC filing ↗
2026-03-06CAMPANELLI JOSEPH PPurchase (P)Common Stock5,000USD 20.77USD 103,870SEC filing ↗
2026-03-06CAMPANELLI JOSEPH PPurchase (P)Common Stock5,000USD 20.77USD 103,870SEC filing ↗
2026-02-25White James J.Award / grant (A)Common Stock6,874USD 0.00USD 0SEC filing ↗
2026-02-25Roberts ChristineAward / grant (A)Common Stock13,749USD 0.00USD 0SEC filing ↗
2026-02-25Richardson MatthewAward / grant (A)Common Stock13,749USD 0.00USD 0SEC filing ↗
2026-02-25Maiona StephanieAward / grant (A)Common Stock6,874USD 0.00USD 0SEC filing ↗
2026-02-25Lapointe Jean-PierreAward / grant (A)Common Stock13,749USD 0.00USD 0SEC filing ↗
2026-02-25Henkin KevinAward / grant (A)Common Stock6,874USD 0.00USD 0SEC filing ↗
2026-02-25EVANGELISTA PAUL AAward / grant (A)Common Stock6,874USD 0.00USD 0SEC filing ↗
2026-02-25Daley James B.Award / grant (A)Common Stock6,874USD 0.00USD 0SEC filing ↗
2026-02-25CAMPANELLI JOSEPH PAward / grant (A)Common Stock63,015USD 0.00USD 0SEC filing ↗
2026-01-02Whalen MarkAward / grant (A)Common Stock2,402USD 0.00USD 0SEC filing ↗
2026-01-02Reilly Joseph BAward / grant (A)Common Stock2,402USD 0.00USD 0SEC filing ↗

Multiple price lines in one filing are grouped and share-weighted. Price and value are blank when a grouped filing line lacks price evidence.

Snapshot & identity

Snapshot date2026-10-19
Ranking versionUS-v1.2
Data qualityPASS ELIGIBLE · —
TickerNBBK
CIK0001979330
SectorFinancial Services
IndustryBanks—Regional Yahoo Finance
SEC SIC6036 Savings Institutions, Not Federally Chartered
ExchangeNasdaq

Data coverage

Local Form 4 history138 transaction lines from 2023-12-28 to 2026-08-20
85 P purchase lines · 1 S sale lines · 52 other lines
SEC company submissionsOpen SEC filings ↗

Local ledger as of 2026-10-19. Mapping status is an audit field and does not erase SEC filing evidence.