Comparable stake leader
Needham Bank Employee Stock Ownership Plan Trust
SEC ownership of NB Bancorp, Inc.
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0001979330.
Disclosed value leader
BlackRock, Inc.
Comparable rows
50/50
Latest evidence
20 Aug 2026
- Public ticker
- NBBK on Nasdaq
- Parsed ownership sources
-
13D/G, 13F, and 3/4/5
Source: Parsed SEC ownership filingsUse: Compare filing families carefully
- Largest SEC-reported holder
-
Needham Bank Employee Stock Ownership Plan Trust
Ranking: Comparable ownership first, then disclosed value
- Comparable ownership rows
-
50 of 50
Meaning: Rows with safely comparable ownership %
- Latest 13D/G holder
-
Needham Bank Employee Stock Ownership Plan Trust
Source: Latest parsed Schedule 13D/G stake
- Latest parsed ownership date
-
20 Aug 2026
Freshness: Most recent filing date in this holder set
- Issuer CIK
- 0001979330
- Issuer location
- Needham, MA
Ownership snapshot
CIK-linked ownership evidence from parsed SEC filings.
3 signals
Issuer
Names, identifiers, and filing context for this profile.
2 identity fields
Ownership snapshot
Top shareholders of NB Bancorp, Inc. (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
Needham Bank Employee Sto...
Disclosed value leader
BlackRock, Inc.
Comparable rows
50/50
Latest evidence
20 Aug 2026
13D/G
13F
3/4/5
Lead comparable stake: 7.5%
13D/G row: Needham Bank Employee Stock Ownership Plan Trust
Showing 1-8 of 50 holder rows.
Quick read
Needham Bank Employee Stock Ownership Plan Trust leads the comparable SEC ownership view at 7.5%.
50 of 50 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens Needham Bank Employee Stock Ownership Plan Trust's linked filing trail.
Comparable ownership
Top 5
Needham Bank Employee Stock Owner...
7.5%
BlackRock, Inc.
6.7%
Pertento Partners LLP
4.6%
Joseph P. Campanelli
1.1%
Hope Pascucci
0.5%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-8 of 50 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| Needham Bank Employee Stock Ownership Plan Trust |
13D/G
|
7.5%
|
$67,543,375
3,416,458 shares
|
$0 | 31 Dec 2025 |
| BlackRock, Inc. |
13F
13D/G
Company
|
6.7%
from 13D/G
|
$70,395,517
3,331,544 shares
|
— | 30 Jun 2026 |
| Pertento Partners LLP |
13D/G
13F
Company
|
4.6%
|
$43,185,367
2,049,614 shares
|
-$6,097,089 | 31 Mar 2026 |
| Joseph P. Campanelli |
3/4/5
President & CEO, Director, Chairman of the Board
|
1.1%
|
$10,476,905
484,687 shares
|
+$260,435 | 20 Aug 2026 |
| Hope Pascucci |
3/4/5
Director
|
0.5%
|
$4,460,858
222,402 shares
|
+$473,983 | 24 Apr 2026 |
| William Darcey |
3/4/5
Director
|
0.37%
|
$3,426,803
162,639 shares
|
— | 24 Apr 2026 |
| Christopher R. Lynch |
3/4/5
Director
|
0.35%
|
$3,306,346
156,922 shares
|
— | 24 Apr 2026 |
| Francis Orfanello |
3/4/5
Director
|
0.32%
|
$2,836,977
143,140 shares
|
— | 02 Jan 2026 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
Forms 3/4/5 flow
Insider trading overview
Net insider flow leans to buying over the last 12 months. Net value: +$890,780.
Buys
$936,640
Insiders: 5
Sells
$45,860
Insiders: 1
Net
+$890,780
Shares: +45,888
Window
Last 12 months
4 rolling buckets
Buy value
Sell value
Shares: 47,888
Shares: 2,000
| Window (months) | Buy shares | Sell shares | Buy value | Sell value | Net value |
|---|---|---|---|---|---|
| 0-3 | 2,200 | 2,000 | $47,860 | $45,860 | +$2,000 |
| 3-6 | 34,000 | 0 | $670,136 | $0 | +$670,136 |
| 6-9 | 2,000 | 0 | $41,743 | $0 | +$41,743 |
| 9-12 | 9,688 | 0 | $176,902 | $0 | +$176,902 |
Reporting owners
Insider holders from Forms 3/4/5
Showing 1-20 of 27 reporting-owner rows connected to NB Bancorp, Inc.. Open a relationship link for the CIK-to-CIK filing trail.
Rows
27
Largest Forms 3/4/5 holder
Joseph P. Campanelli
Net 12M change
+$842,921
Latest report
20 Aug 2026
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| Joseph P. Campanelli | President & CEO, Director, Chairman of the Board | $10,476,905 | +$260,435 | +2.5% | Mixed | 20 Aug 2026 |
| Hope Pascucci | Director | $4,460,858 | +$473,983 | +12% | Mixed | 24 Apr 2026 |
| William Darcey | Director | $3,426,803 | Mixed | 24 Apr 2026 | ||
| Christopher R. Lynch | Director | $3,306,346 | Mixed | 24 Apr 2026 | ||
| Francis Orfanello | Director | $2,836,977 | Mixed | 02 Jan 2026 | ||
| Jean-Pierre Lapointe | SEVP and CFO | $2,538,848 | +$20,420 | +0.81% | Mixed | 20 Aug 2026 |
| Mark Whalen | Director | $2,267,953 | Mixed | 24 Apr 2026 | ||
| Mary Susan Elliott | Director | $2,197,718 | Filing P/S | 02 Jan 2026 | ||
| Paul J. Ayoub | Director | $1,932,648 | Mixed | 02 Jan 2026 | ||
| Joseph R. Nolan Jr. | Director | $1,848,660 | Mixed | 24 Apr 2026 | ||
| Kenneth C. Montgomery | Director | $1,793,899 | +$92,200 | +5.4% | Mixed | 24 Apr 2026 |
| Angela Jackson | Director | $1,712,042 | Mixed | 24 Apr 2026 | ||
| Muhammad Raza | Director | $1,612,224 | Mixed | 02 Jan 2026 | ||
| Christine Roberts | SEVP and COO | $1,497,676 | Mixed | 24 Apr 2026 | ||
| Salvatore J. Rinaldi | EVP and COO | $1,260,051 | Mixed | 29 Apr 2024 | ||
| James J. White | EVP, Chief Administrative Offc | $1,185,270 | Mixed | 25 Feb 2026 | ||
| Joseph B. Reilly | Director | $1,055,927 | Mixed | 02 Jan 2026 | ||
| Paul A. Evangelista | EVP, Dir Spec. Bank. Ctr. | $1,014,710 | +$41,743 | +4.3% | Mixed | 25 Feb 2026 |
| Stephanie Maiona | EVP, Dir CRE Banking | $994,229 | Mixed | 25 Feb 2026 | ||
| Peter Bakkala | EVP and Chief Risk Officer | $540,157 | Mixed | 10 Jun 2025 |
Recent insider transactions for NB Bancorp, Inc.
Showing up to 300 recent insider transactions from the last 12 months.
| Insider | Symbol | Class | Transaction | % | SEC-reported value | SEC-reported price | Shares | Shares owned | Date | Ownership |
|---|---|---|---|---|---|---|---|---|---|---|
| Joseph P. Campanelli | NBBK | Common Stock | Purchase | 0.53% | $43,500 | $21.75 | 2,000 | 379,790 | 20 Aug 2026 | Direct |
| Jean-Pierre Lapointe | NBBK | Common Stock | Purchase | 0.18% | $4,360 | $21.80 | 200 | 110,531 | 20 Aug 2026 | Direct |
| Kevin Henkin | NBBK | Common Stock | Sale | -22.5% | $45,860 | $22.93 | -2,000 | 6,874 | 14 Aug 2026 | Direct |
| Joseph P. Campanelli | NBBK | Common Stock | Purchase | 0.8% | $57,547 | $19.18 | 3,000 | 377,790 | 15 May 2026 | Direct |
| Joseph P. Campanelli | NBBK | Common Stock | Purchase | 0.67% | $48,618 | $19.45 | 2,500 | 374,790 | 24 Apr 2026 | Direct |
| Joseph P. Campanelli | NBBK | Common Stock | Tax liability | -6.14% | -24,371 | 372,290 | 24 Apr 2026 | Direct | ||
| Christine Roberts | NBBK | Common Stock | Tax liability | -4.81% | -3,589 | 71,081 | 24 Apr 2026 | Direct | ||
| Hope Pascucci | NBBK | Common Stock | Purchase | 16.3% | $389,281 | $19.46 | 20,000 | 142,402 | 24 Apr 2026 | Direct |
| Joseph P. Campanelli | NBBK | Common Stock | Purchase | 0.63% | $50,400 | $20.16 | 2,500 | 396,661 | 19 Mar 2026 | Direct |
| Matthew G. Schulman | NBBK | Common Stock | Award | 6,980 | 6,980 | 09 Mar 2026 | Direct | |||
| Jean-Pierre Lapointe | NBBK | Common Stock | Purchase | 0.91% | $20,420 | $20.42 | 1,000 | 110,331 | 09 Mar 2026 | Direct |
| Joseph P. Campanelli | NBBK | Common Stock | Purchase | $62,310 | $20.77 | 3,000 | 3,000 | 06 Mar 2026 | As trustee for trust | |
| Joseph P. Campanelli | NBBK | Common Stock | Purchase | 4.44% | $41,560 | $20.78 | 2,000 | 47,000 | 06 Mar 2026 | By IRA |
| Joseph P. Campanelli | NBBK | Common Stock | Award | 19% | 63,015 | 394,161 | 25 Feb 2026 | Direct | ||
| James J. White | NBBK | Common Stock | Award | 68.7% | 6,874 | 16,874 | 25 Feb 2026 | Direct | ||
| Paul A. Evangelista | NBBK | Common Stock | Award | 25.9% | 6,874 | 33,440 | 25 Feb 2026 | Direct | ||
| Kevin Henkin | NBBK | Common Stock | Award | 343.7% | 6,874 | 8,874 | 25 Feb 2026 | Direct | ||
| Matthew Richardson | NBBK | Common Stock | Award | 13,749 | 13,749 | 25 Feb 2026 | Direct | |||
| Jean-Pierre Lapointe | NBBK | Common Stock | Award | 14.4% | 13,749 | 109,331 | 25 Feb 2026 | Direct | ||
| Christine Roberts | NBBK | Common Stock | Award | 22.6% | 13,749 | 74,670 | 25 Feb 2026 | Direct | ||
| James B. Daley | NBBK | Common Stock | Award | 6,874 | 6,874 | 25 Feb 2026 | Direct | |||
| Stephanie Maiona | NBBK | Common Stock | Award | 6,874 | 6,874 | 25 Feb 2026 | Direct | |||
| Joseph B. Reilly | NBBK | Common Stock | Award | 20% | 2,402 | 14,414 | 02 Jan 2026 | Direct | ||
| Paul J. Ayoub | NBBK | Common Stock | Award | 9.57% | 7,205 | 82,512 | 02 Jan 2026 | Direct | ||
| Mary Susan Elliott | NBBK | Common Stock | Award | 5.51% | 5,524 | 105,761 | 02 Jan 2026 | Direct | ||
| Christopher R. Lynch | NBBK | Common Stock | Award | 8.61% | 7,685 | 96,922 | 02 Jan 2026 | Direct | ||
| Mark Whalen | NBBK | Common Stock | Award | 3.19% | 2,402 | 77,639 | 02 Jan 2026 | Direct | ||
| Kenneth C. Montgomery | NBBK | Common Stock | Award | 5.98% | 4,803 | 85,140 | 02 Jan 2026 | Direct | ||
| Angela Jackson | NBBK | Common Stock | Award | 3.05% | 2,402 | 81,255 | 02 Jan 2026 | Direct | ||
| Joseph R. Nolan Jr. | NBBK | Common Stock | Award | 2.81% | 2,402 | 87,739 | 02 Jan 2026 | Direct | ||
| Muhammad Raza | NBBK | Common Stock | Award | 3.19% | 2,402 | 77,639 | 02 Jan 2026 | Direct | ||
| Hope Pascucci | NBBK | Common Stock | Award | 2% | 2,402 | 122,402 | 02 Jan 2026 | Direct | ||
| Francis Orfanello | NBBK | Common Stock | Award | 4.15% | 5,403 | 135,640 | 02 Jan 2026 | Direct | ||
| William Darcey | NBBK | Common Stock | Award | 2.99% | 2,402 | 82,639 | 02 Jan 2026 | Direct | ||
| Paul A. Evangelista | NBBK | Common Stock | Purchase | 8.14% | $41,743 | $20.87 | 2,000 | 26,566 | 19 Dec 2025 | Direct |
| Christopher R. Lynch | NBBK | Common Stock | Gift | -2.96% | -2,725 | 89,237 | 10 Nov 2025 | Direct | ||
| Christopher R. Lynch | NBBK | Common Stock | Gift | -0.65% | -600 | 91,962 | 30 Oct 2025 | Direct | ||
| Hope Pascucci | NBBK | Common Stock | Purchase | 4.07% | $84,702 | $18.07 | 4,688 | 120,000 | 28 Oct 2025 | Direct |
| Christopher R. Lynch | NBBK | Common Stock | Gift | -0.64% | -600 | 92,562 | 16 Sep 2025 | Direct | ||
| Kenneth C. Montgomery | NBBK | Common Stock | Purchase | 6.64% | $92,200 | $18.44 | 5,000 | 80,337 | 12 Sep 2025 | Direct |
| Christopher R. Lynch | NBBK | Common Stock | Gift | -0.64% | -600 | 93,162 | 10 Sep 2025 | Direct | ||
| Christopher R. Lynch | NBBK | Common Stock | Gift | -0.64% | -600 | 93,762 | 09 Sep 2025 | Direct |
* marks a reported price that did not pass the local price check.