Kenneth C. Montgomery

CIK: 0002037513

Transaction Breakdown

Open Market Buys (P)2 (40.0%)

High conviction signal

Open Market Sales (S)0 (0.0%)

Position reduction

Option Exercises (M)0 (0.0%)

Derivative conversions

Awards (A)2 (40.0%)

Compensation grants

Other (G, F, J, C, D, …)1 (20.0%)

Gifts, tax withholding, conversions, dispositions to the issuer and other codes

Companies & Roles (1)

NBBK

NB Bancorp, Inc.

Director

Discretionary Trading P&L

Holdings

Transaction History (5 total)

NBBK
NB Bancorp, Inc.
Apr 24, 2026
Tax Payment(F)
Direct
5K shares at avg. $19.82$99K
NBBK
NB Bancorp, Inc.
Jan 2, 2026
Award(A)
Direct
4.8K shares-
NBBK
NB Bancorp, Inc.
Sep 12, 2025
Purchase(P)
Direct
5K shares at avg. $18.44$92K
NBBK
NB Bancorp, Inc.
Apr 24, 2025
Award(A)
Direct
75.2K shares-
NBBK
NB Bancorp, Inc.
Sep 19, 2024
Purchase(P)
Direct
100 shares at avg. $18.62$2K

		Type	Shares	Price		Ownership
Apr 24, 2026	NBBK NB Bancorp, Inc.	Tax Payment(F)	5,015	$19.82	$99,397	Direct
Jan 2, 2026	NBBK NB Bancorp, Inc.	Award(A)	4,803	-	$0	Direct
Sep 12, 2025	NBBK NB Bancorp, Inc.	Purchase(P)	5,000	$18.44	$92,200	Direct
Apr 24, 2025	NBBK NB Bancorp, Inc.	Award(A)	75,237	-	-	Direct
Sep 19, 2024	NBBK NB Bancorp, Inc.	Purchase(P)	100	$18.62	$1,862	Direct

1-5 of 5 transactions

About Montgomery Kenneth C.

Montgomery Kenneth C. (SEC CIK 0002037513) files insider reports with the SEC as Director of NB Bancorp, Inc. (NBBK).

Signal8 holds 7 ownership filings by Montgomery Kenneth C. (1 Form 3, 6 Form 4), filed between Sep 16, 2024 and May 15, 2026. Those filings report 5 transactions, from Sep 19, 2024 to Apr 24, 2026. Signal8's Form 4 history starts in Sep 2024.

The business address on Montgomery Kenneth C.'s filings is in NEEDHAM, MA.

Recent filings by Montgomery Kenneth C.

Apr 24, 2026: Tax withholding of NBBK shares (Form 4, code F).
Jan 2, 2026: Grant or award of NBBK shares (Form 4, code A).
Sep 12, 2025: Open-market purchase of NBBK shares (Form 4, code P).
Apr 24, 2025: Grant or award of NBBK shares (Form 4, code A).
Sep 19, 2024: Open-market purchase of NBBK shares (Form 4, code P).

Other insiders filing for NB Bancorp, Inc. (NBBK)

CAMPANELLI JOSEPH P, President & CEO
Lapointe Jean-Pierre, SEVP and CFO
Henkin Kevin, EVP, Chief Credit Officer
Lynch Christopher R., Director
NOLAN JOSEPH R JR, Director
Whalen Mark, Director

How to read Form 4 transaction codes