Northfield Bancorp, Inc. (NFBK)

Data as of Jul 21, 2026, from SEC Form 4 filings.

No open-market insider trades (90d)Watch NFBK

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Latest NFBK insider trades

David Fasanella - Officer
Open-market purchase$98K
Mar 19, 2026
Paul Stahlin - Director
Open-market purchase$132K
Mar 17, 2026
Vickie Tomasello - Officer

About Northfield Bancorp, Inc. (NFBK)

The SEC lists Northfield Bancorp, Inc. under CIK 0001493225, in savings institution, federally chartered. We track it alongside the rest of the Financials sector.

Sector: Financials

SEC filings for NFBK on EDGAR

NFBK Form 4 activity by transaction type, last 90 days

Form 4 transaction type	Transactions	Shares	Total value
Derivative transaction	45	2,099,100

Dollar totals cover purchases and sales only (codes P and S). Grants, option exercises, gifts and tax withholding are counted in shares, because none of them is a trade at a market price.

NFBK insider transactions (Form 4)

53 Form 4 filings on record, the earliest from Dec 17, 2024, newest first. Filing history page 1 of 2.

Date	Insider	Transaction	Security	Shares	Price	Value
Jul 20, 2026	Vickie Tomasello - Officer	Derivative	Common Stock	9,070	-^{footnote F1}	-
Jul 20, 2026	Vickie Tomasello - Officer	Derivative	Common Stock	1,138	-^{footnote F1}	-
Jul 20, 2026	Vickie Tomasello - Officer	Derivative	Restricted Stock Units	12,966	-^{footnote F2}	-
Footnote F1 (price): Pursuant to the Agreement and Plan of Merger dated as of January 31, 2026, by and among Columbia Financial, Inc., a Delaware corporation, Columbia Financial, Inc., a Maryland corporation (Newco), Columbia Bank MHC and Northfield Bancorp, Inc. (Merger Agreement), at the effective… Full note on SEC EDGAR Footnote F2 (price): Pursuant to the Merger Agreement, each restricted stock unit was converted into the right to receive 1.425 units that will be settled in cash based on the closing price of Newco common stock on the day of vesting.
Jul 20, 2026	Frank P. Patafio - Director	Derivative	Common Stock	267,362	-^{footnote F1}	-
Jul 20, 2026	Frank P. Patafio - Director	Derivative	Restricted Stock Units	4,383	-^{footnote F2}	-
Footnote F1 (price): Pursuant to the Agreement and Plan of Merger dated as of January 31, 2026, by and among Columbia Financial, Inc., a Delaware corporation, Columbia Financial, Inc., a Maryland corporation (Newco), Columbia Bank MHC and Northfield Bancorp, Inc. (Merger Agreement), at the effective… Full note on SEC EDGAR Footnote F2 (price): Pursuant to the Merger Agreement, each restricted stock unit was converted into the right to receive 1.425 units that will be settled in cash based on the closing price of Newco common stock on the day of vesting.
Jul 20, 2026	Gil Chapman - Director	Derivative	Common Stock	48,005	-^{footnote F1}	-
Jul 20, 2026	Gil Chapman - Director	Derivative	Common Stock	6,763	-^{footnote F1}	-
Jul 20, 2026	Gil Chapman - Director	Derivative	Common Stock	7,651	-^{footnote F1}	-
Jul 20, 2026	Gil Chapman - Director	Derivative	Restricted Stock Units	4,383	-^{footnote F2}	-
Footnote F1 (price): Pursuant to the Agreement and Plan of Merger dated as of January 31, 2026, by and among Columbia Financial, Inc., a Delaware corporation, Columbia Financial, Inc., a Maryland corporation (Newco), Columbia Bank MHC and Northfield Bancorp, Inc. (Merger Agreement), at the effective… Full note on SEC EDGAR Footnote F2 (price): Pursuant to the Merger Agreement, each restricted stock unit was converted into the right to receive 1.425 units that will be settled in cash based on the closing price of Newco common stock on the day of vesting.
Jul 20, 2026	Timothy C. Harrison - Director	Derivative	Common Stock	82,313	-^{footnote F1}	-
Jul 20, 2026	Timothy C. Harrison - Director	Derivative	Restricted Stock Units	4,383	-^{footnote F2}	-
Footnote F1 (price): Pursuant to the Agreement and Plan of Merger dated as of January 31, 2026, by and among Columbia Financial, Inc., a Delaware corporation, Columbia Financial, Inc., a Maryland corporation (Newco), Columbia Bank MHC and Northfield Bancorp, Inc. (Merger Agreement), at the effective… Full note on SEC EDGAR Footnote F2 (price): Pursuant to the Merger Agreement, each restricted stock unit was converted into the right to receive 1.425 units that will be settled in cash based on the closing price of Newco common stock on the day of vesting.
Jul 20, 2026	David Fasanella - Officer	Derivative	Common Stock	46,019	-^{footnote F1}	-
Jul 20, 2026	David Fasanella - Officer	Derivative	Common Stock	11,500	-^{footnote F1}	-
Jul 20, 2026	David Fasanella - Officer	Derivative	Common Stock	9,612	-^{footnote F1}	-
Jul 20, 2026	David Fasanella - Officer	Derivative	Common Stock	2,383	-^{footnote F1}	-
Jul 20, 2026	David Fasanella - Officer	Derivative	Restricted Stock Units	15,066	-^{footnote F2}	-
Footnote F1 (price): Pursuant to the Agreement and Plan of Merger dated as of January 31, 2026, by and among Columbia Financial, Inc., a Delaware corporation, Columbia Financial, Inc., a Maryland corporation (Newco), Columbia Bank MHC and Northfield Bancorp, Inc. (Merger Agreement), at the effective… Full note on SEC EDGAR Footnote F2 (price): Pursuant to the Merger Agreement, each restricted stock unit was converted into the right to receive 1.425 units that will be settled in cash based on the closing price of Newco common stock on the day of vesting.
Jul 20, 2026	Annette Catino - Director	Derivative	Common Stock	229,988	-^{footnote F1}	-
Jul 20, 2026	Annette Catino - Director	Derivative	Common Stock	37,460	-^{footnote F1}	-
Jul 20, 2026	Annette Catino - Director	Derivative	Common Stock	21,000	-^{footnote F1}	-
Jul 20, 2026	Annette Catino - Director	Derivative	Restricted Stock Units	4,383	-^{footnote F2}	-
Footnote F1 (price): Pursuant to the Agreement and Plan of Merger dated as of January 31, 2026, by and among Columbia Financial, Inc., a Delaware corporation, Columbia Financial, Inc., a Maryland corporation (Newco), Columbia Bank MHC and Northfield Bancorp, Inc. (Merger Agreement), at the effective… Full note on SEC EDGAR Footnote F2 (price): Pursuant to the Merger Agreement, each restricted stock unit was converted into the right to receive 1.425 units that will be settled in cash based on the closing price of Newco common stock on the day of vesting.
Jul 20, 2026	Paul Stahlin - Director	Derivative	Common Stock	54,354	-^{footnote F1}	-
Jul 20, 2026	Paul Stahlin - Director	Derivative	Restricted Stock Units	4,383	-^{footnote F2}	-
Footnote F1 (price): Pursuant to the Agreement and Plan of Merger dated as of January 31, 2026, by and among Columbia Financial, Inc., a Delaware corporation, Columbia Financial, Inc., a Maryland corporation (Newco), Columbia Bank MHC and Northfield Bancorp, Inc. (Merger Agreement), at the effective… Full note on SEC EDGAR Footnote F2 (price): Pursuant to the Merger Agreement, each restricted stock unit was converted into the right to receive 1.425 units that will be settled in cash based on the closing price of Newco common stock on the day of vesting.
Jul 20, 2026	John P. Connors Jr. - Director	Derivative	Common Stock	168,569	-^{footnote F1}	-
Jul 20, 2026	John P. Connors Jr. - Director	Derivative	Common Stock	33,181	-^{footnote F1}	-
Jul 20, 2026	John P. Connors Jr. - Director	Derivative	Common Stock	7,041	-^{footnote F1}	-
Jul 20, 2026	John P. Connors Jr. - Director	Derivative	Common Stock	841	-^{footnote F1}	-
Jul 20, 2026	John P. Connors Jr. - Director	Derivative	Restricted Stock Units	4,383	-^{footnote F2}	-
Footnote F1 (price): Pursuant to the Agreement and Plan of Merger dated as of January 31, 2026, by and among Columbia Financial, Inc., a Delaware corporation, Columbia Financial, Inc., a Maryland corporation (Newco), Columbia Bank MHC and Northfield Bancorp, Inc. (Merger Agreement), at the effective… Full note on SEC EDGAR Footnote F2 (price): Pursuant to the Merger Agreement, each restricted stock unit was converted into the right to receive 1.425 units that will be settled in cash based on the closing price of Newco common stock on the day of vesting.
Jul 20, 2026	Steven M. Klein - Officer	Derivative	Common Stock	464,261	-^{footnote F1}	-
Jul 20, 2026	Steven M. Klein - Officer	Derivative	Common Stock	66,997	-^{footnote F1}	-
Jul 20, 2026	Steven M. Klein - Officer	Derivative	Common Stock	59,119	-^{footnote F1}	-
Jul 20, 2026	Steven M. Klein - Officer	Derivative	Stock Options	40,000	-^{footnote F2}	-
Footnote F1 (price): Pursuant to the Agreement and Plan of Merger dated as of January 31, 2026, by and among Columbia Financial, Inc., a Delaware corporation, Columbia Financial, Inc., a Maryland corporation (Newco), Columbia Bank MHC and Northfield Bancorp, Inc. (Merger Agreement), at the effective… Full note on SEC EDGAR Footnote F2 (price): Pursuant to the Merger Agreement, each outstanding and unexercised option immediately prior to the effective time of the merger, whether vested or unvested, was converted into an option exercisable for a total number of shares of Newco common stock equal to the total number of… Full note on SEC EDGAR
Jul 20, 2026	William R. Jacobs - Officer	Derivative	Common Stock	64,947	-^{footnote F1}	-
Jul 20, 2026	William R. Jacobs - Officer	Derivative	Common Stock	38,614	-^{footnote F1}	-
Jul 20, 2026	William R. Jacobs - Officer	Derivative	Common Stock	12,949	-^{footnote F1}	-
Jul 20, 2026	William R. Jacobs - Officer	Derivative	Restricted Stock Units	15,888	-^{footnote F2}	-
Footnote F1 (price): Pursuant to the Agreement and Plan of Merger dated as of January 31, 2026, by and among Columbia Financial, Inc., a Delaware corporation, Columbia Financial, Inc., a Maryland corporation (Newco), Columbia Bank MHC and Northfield Bancorp, Inc. (Merger Agreement), at the effective… Full note on SEC EDGAR Footnote F2 (price): Pursuant to the Merger Agreement, each restricted stock unit was converted into the right to receive 1.425 units that will be settled in cash based on the closing price of Newco common stock on the day of vesting.
Jul 20, 2026	Rachana A. Kulkarni - Director	Derivative	Common Stock	18,688	-^{footnote F1}	-
Jul 20, 2026	Rachana A. Kulkarni - Director	Derivative	Restricted Stock Units	4,383	-^{footnote F2}	-
Footnote F1 (price): Pursuant to the Agreement and Plan of Merger dated as of January 31, 2026, by and among Columbia Financial, Inc., a Delaware corporation, Columbia Financial, Inc., a Maryland corporation (Newco), Columbia Bank MHC and Northfield Bancorp, Inc. (Merger Agreement), at the effective… Full note on SEC EDGAR Footnote F2 (price): Pursuant to the Merger Agreement, each restricted stock unit was converted into the right to receive 1.425 units that will be settled in cash based on the closing price of Newco common stock on the day of vesting.
Jul 20, 2026	Karen J. Kessler - Director	Derivative	Common Stock	64,854	-^{footnote F1}	-
Jul 20, 2026	Karen J. Kessler - Director	Derivative	Common Stock	3,500	-^{footnote F1}	-
Jul 20, 2026	Karen J. Kessler - Director	Derivative	Restricted Stock Units	4,383	-^{footnote F2}	-
Footnote F1 (price): Pursuant to the Agreement and Plan of Merger dated as of January 31, 2026, by and among Columbia Financial, Inc., a Delaware corporation, Columbia Financial, Inc., a Maryland corporation (Newco), Columbia Bank MHC and Northfield Bancorp, Inc. (Merger Agreement), at the effective… Full note on SEC EDGAR Footnote F2 (price): Pursuant to the Merger Agreement, each restricted stock unit was converted into the right to receive 1.425 units that will be settled in cash based on the closing price of Newco common stock on the day of vesting.
Jul 20, 2026	Robin Lefkowitz - Officer	Derivative	Common Stock	23,534	-^{footnote F1}	-
Jul 20, 2026	Robin Lefkowitz - Officer	Derivative	Common Stock	26,136	-^{footnote F1}	-
Jul 20, 2026	Robin Lefkowitz - Officer	Derivative	Common Stock	38,388	-^{footnote F1}	-
Jul 20, 2026	Robin Lefkowitz - Officer	Derivative	Restricted Stock Units	13,879	-^{footnote F2}	-
Jul 20, 2026	Robin Lefkowitz - Officer	Derivative	Stock Options	40,000	-^{footnote F3}	-
Footnote F1 (price): Pursuant to the Agreement and Plan of Merger dated as of January 31, 2026, by and among Columbia Financial, Inc., a Delaware corporation, Columbia Financial, Inc., a Maryland corporation (Newco), Columbia Bank MHC and Northfield Bancorp, Inc. (Merger Agreement), at the effective… Full note on SEC EDGAR Footnote F2 (price): Pursuant to the Merger Agreement, each restricted stock unit was converted into the right to receive 1.425 units that will be settled in cash based on the closing price of Newco common stock on the day of vesting. Footnote F3 (price): Pursuant to the Merger Agreement, each outstanding and unexercised option immediately prior to the effective time of the merger, whether vested or unvested, was converted into an option exercisable for a total number of shares of Newco common stock equal to the total number of… Full note on SEC EDGAR
Jul 14, 2026	Vickie Tomasello - Officer	Tax withholding / forfeiture	Common Stock	3,297^{footnote F1}	$14.72	$49K
Footnote F1 (shares): Represents shares sold by the Reporting Person to satisfy tax obligations in connection with the accelerated vesting of restricted stock previously issued.
Jul 14, 2026	William R. Jacobs - Officer	Tax withholding / forfeiture	Common Stock	4,118^{footnote F1}	$14.72	$61K
Footnote F1 (shares): Represents shares sold by the Reporting Person to satisfy tax obligations in connection with the accelerated vesting of restricted stock previously issued.
Jul 14, 2026	Robin Lefkowitz - Officer	Tax withholding / forfeiture	Common Stock	3,423^{footnote F1}	$14.72	$50K
Footnote F1 (shares): Represents shares sold by the Reporting Person to satisfy tax obligations in connection with the accelerated vesting of an equity award.
Jul 14, 2026	Steven M. Klein - Officer	Tax withholding / forfeiture	Common Stock	9,732^{footnote F1}	$14.72	$143K
Footnote F1 (shares): Represents shares sold by the Reporting Person to satisfy tax obligations in connection with the accelerated vesting of restricted stock previously issued.
Jul 14, 2026	David Fasanella - Officer	Tax withholding / forfeiture	Common Stock	3,905^{footnote F1}	$14.72	$57K
Footnote F1 (shares): Represents shares sold by the Reporting Person to satisfy tax obligations in connection with the accelerated vesting of restricted stock previously issued.
Mar 19, 2026	David Fasanella - Officer	Open-market purchase	Common Stock	7,500	$13.07	$98K
Mar 17, 2026	Paul Stahlin - Director	Open-market purchase	Common Stock	10,000	$13.19^{footnote F1}	$132K
Footnote F1 (price): The price reported in column 4 is a weighted average price. The shares were purchased at prices ranging from $13.13 to $13.20, inclusive. The reporting person undertakes to provide to Northfield Bancorp, Inc., any security holder of Northfield Bancorp, Inc., or the staff of the… Full note on SEC EDGAR
Feb 4, 2026	Paul Stahlin - Director	Grant or award	Restricted Stock Units	4,383	$0.00	-
Feb 4, 2026	Annette Catino - Director	Grant or award	Restricted Stock Units	4,383	$0.00	-
Feb 4, 2026	David Fasanella - Officer	Grant or award	Restricted Stock Units	15,066	$0.00	-
Feb 4, 2026	Frank P. Patafio - Director	Grant or award	Restricted Stock Units	4,383	$0.00	-
Feb 4, 2026	Gil Chapman - Director	Grant or award	Restricted Stock Units	4,383	$0.00	-
Feb 4, 2026	John P. Connors Jr. - Director	Grant or award	Restricted Stock Units	4,383	$0.00	-
Feb 4, 2026	Vickie Tomasello - Officer	Grant or award	Restricted Stock Units	12,966	$0.00	-
Feb 4, 2026	Robin Lefkowitz - Officer	Grant or award	Restricted Stock Units	13,879	$0.00	-
Feb 4, 2026	Timothy C. Harrison - Director	Grant or award	Restricted Stock Units	4,383	$0.00	-
Feb 4, 2026	Karen J. Kessler - Director	Grant or award	Restricted Stock Units	4,383	$0.00	-

Recent NFBK Form 8-K filings

Read NFBK company news

Jul 22, 2026Item 2.01, 3.01, 3.03, 5.01, 5.02, 5.03, 9.01

Read the filing on SEC EDGAR

Jun 26, 2026Item 5.07

Read the filing on SEC EDGAR

Apr 21, 2026Item 2.02, 8.01, 9.01

Read the filing on SEC EDGAR

NFBK insider trading FAQ

What is the latest insider trade for NFBK?

Northfield Bancorp, Inc. (NFBK) had 13 insider filings in the last 90 days, with the most recent on 2026-07-21. The full record for NFBK runs to 53 Form 4 filings, the earliest from 2024-12-17. InsiderAlpha adds new Form 4, Form 144 and 8-K filings as they arrive from SEC EDGAR.

How many insiders are buying NFBK stock?

No insider purchases of NFBK were filed in the last 90 days. 2 purchases are on record for this company.

How many insiders are selling NFBK stock?

No insider sales of NFBK were filed in the last 90 days. 2 sales are on record for this company.

Where can I see NFBK SEC filings (Form 4, 10-K, 10-Q, 8-K)?

This page collects NFBK Form 4 insider transactions, Form 144 sale notices and 8-K filings in one place. Annual 10-K and quarterly 10-Q reports live on the company's SEC EDGAR page.

More Financials companies with insider activity

Recent insider filings

The EDGAR links open each original Form 4, so you can check any number on this page against the filing it came from.

Jul 21, 2026 - Vickie Tomasello view on EDGAR
Jul 21, 2026 - Frank P. Patafio view on EDGAR
Jul 21, 2026 - Gil Chapman view on EDGAR
Jul 21, 2026 - Timothy C. Harrison view on EDGAR
Jul 21, 2026 - David Fasanella view on EDGAR
Jul 21, 2026 - Annette Catino view on EDGAR
Jul 21, 2026 - Paul Stahlin view on EDGAR
Jul 21, 2026 - John P. Connors Jr. view on EDGAR
Jul 21, 2026 - Steven M. Klein view on EDGAR

Related companies with recent insider activity

Learn more

What the Form 4 transaction codes mean: Grants, option exercises, gifts and tax withholding are not trades on the market. The codes say which is which.
Insider activity in Financials: Where NFBK's peers are being bought and sold.
Every recent Form 4: The market-wide feed, updated as filings arrive from SEC EDGAR.

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Form 4 transaction type

Transactions

Total value

Derivative transaction

2,099,100

Date

Insider

Transaction

Security

Price

Value

Jul 20, 2026

Vickie Tomasello - Officer

Derivative

Common Stock

9,070

-^{footnote F1}

Jul 20, 2026

Vickie Tomasello - Officer

Derivative

Common Stock

1,138

-^{footnote F1}

Jul 20, 2026

Vickie Tomasello - Officer

Derivative

Restricted Stock Units

12,966

-^{footnote F2}

Footnote F1 (price): Pursuant to the Agreement and Plan of Merger dated as of January 31, 2026, by and among Columbia Financial, Inc., a Delaware corporation, Columbia Financial, Inc., a Maryland corporation (Newco), Columbia Bank MHC and Northfield Bancorp, Inc. (Merger Agreement), at the effective… Full note on SEC EDGAR
Footnote F2 (price): Pursuant to the Merger Agreement, each restricted stock unit was converted into the right to receive 1.425 units that will be settled in cash based on the closing price of Newco common stock on the day of vesting.

Jul 20, 2026

Frank P. Patafio - Director

Derivative

Common Stock

267,362

-^{footnote F1}

Jul 20, 2026

Frank P. Patafio - Director

Derivative

Restricted Stock Units

4,383

-^{footnote F2}

Footnote F1 (price): Pursuant to the Agreement and Plan of Merger dated as of January 31, 2026, by and among Columbia Financial, Inc., a Delaware corporation, Columbia Financial, Inc., a Maryland corporation (Newco), Columbia Bank MHC and Northfield Bancorp, Inc. (Merger Agreement), at the effective… Full note on SEC EDGAR
Footnote F2 (price): Pursuant to the Merger Agreement, each restricted stock unit was converted into the right to receive 1.425 units that will be settled in cash based on the closing price of Newco common stock on the day of vesting.

Jul 20, 2026

Gil Chapman - Director

Derivative

Common Stock

48,005

-^{footnote F1}

Jul 20, 2026

Gil Chapman - Director

Derivative

Common Stock

6,763

-^{footnote F1}

Jul 20, 2026

Gil Chapman - Director

Derivative

Common Stock

7,651

-^{footnote F1}

Jul 20, 2026

Gil Chapman - Director

Derivative

Restricted Stock Units

4,383

-^{footnote F2}

Footnote F1 (price): Pursuant to the Agreement and Plan of Merger dated as of January 31, 2026, by and among Columbia Financial, Inc., a Delaware corporation, Columbia Financial, Inc., a Maryland corporation (Newco), Columbia Bank MHC and Northfield Bancorp, Inc. (Merger Agreement), at the effective… Full note on SEC EDGAR
Footnote F2 (price): Pursuant to the Merger Agreement, each restricted stock unit was converted into the right to receive 1.425 units that will be settled in cash based on the closing price of Newco common stock on the day of vesting.

Jul 20, 2026

Timothy C. Harrison - Director

Derivative

Common Stock

82,313

-^{footnote F1}

Jul 20, 2026

Timothy C. Harrison - Director

Derivative

Restricted Stock Units

4,383

-^{footnote F2}

Footnote F1 (price): Pursuant to the Agreement and Plan of Merger dated as of January 31, 2026, by and among Columbia Financial, Inc., a Delaware corporation, Columbia Financial, Inc., a Maryland corporation (Newco), Columbia Bank MHC and Northfield Bancorp, Inc. (Merger Agreement), at the effective… Full note on SEC EDGAR
Footnote F2 (price): Pursuant to the Merger Agreement, each restricted stock unit was converted into the right to receive 1.425 units that will be settled in cash based on the closing price of Newco common stock on the day of vesting.

Jul 20, 2026

David Fasanella - Officer

Derivative

Common Stock

46,019

-^{footnote F1}

Jul 20, 2026

David Fasanella - Officer

Derivative

Common Stock

11,500

-^{footnote F1}

Jul 20, 2026

David Fasanella - Officer

Derivative

Common Stock

9,612

-^{footnote F1}

Jul 20, 2026

David Fasanella - Officer

Derivative

Common Stock

2,383

-^{footnote F1}

Jul 20, 2026

David Fasanella - Officer

Derivative

Restricted Stock Units

15,066

-^{footnote F2}

Footnote F1 (price): Pursuant to the Agreement and Plan of Merger dated as of January 31, 2026, by and among Columbia Financial, Inc., a Delaware corporation, Columbia Financial, Inc., a Maryland corporation (Newco), Columbia Bank MHC and Northfield Bancorp, Inc. (Merger Agreement), at the effective… Full note on SEC EDGAR
Footnote F2 (price): Pursuant to the Merger Agreement, each restricted stock unit was converted into the right to receive 1.425 units that will be settled in cash based on the closing price of Newco common stock on the day of vesting.

Jul 20, 2026

Annette Catino - Director

Derivative

Common Stock

229,988

-^{footnote F1}

Jul 20, 2026

Annette Catino - Director

Derivative

Common Stock

37,460

-^{footnote F1}

Jul 20, 2026

Annette Catino - Director

Derivative

Common Stock

21,000

-^{footnote F1}

Jul 20, 2026

Annette Catino - Director

Derivative

Restricted Stock Units

4,383

-^{footnote F2}

Footnote F1 (price): Pursuant to the Agreement and Plan of Merger dated as of January 31, 2026, by and among Columbia Financial, Inc., a Delaware corporation, Columbia Financial, Inc., a Maryland corporation (Newco), Columbia Bank MHC and Northfield Bancorp, Inc. (Merger Agreement), at the effective… Full note on SEC EDGAR
Footnote F2 (price): Pursuant to the Merger Agreement, each restricted stock unit was converted into the right to receive 1.425 units that will be settled in cash based on the closing price of Newco common stock on the day of vesting.

Jul 20, 2026

Paul Stahlin - Director

Derivative

Common Stock

54,354

-^{footnote F1}

Jul 20, 2026

Paul Stahlin - Director

Derivative

Restricted Stock Units

4,383

-^{footnote F2}

Footnote F1 (price): Pursuant to the Agreement and Plan of Merger dated as of January 31, 2026, by and among Columbia Financial, Inc., a Delaware corporation, Columbia Financial, Inc., a Maryland corporation (Newco), Columbia Bank MHC and Northfield Bancorp, Inc. (Merger Agreement), at the effective… Full note on SEC EDGAR
Footnote F2 (price): Pursuant to the Merger Agreement, each restricted stock unit was converted into the right to receive 1.425 units that will be settled in cash based on the closing price of Newco common stock on the day of vesting.

Jul 20, 2026

John P. Connors Jr. - Director

Derivative

Common Stock

168,569

-^{footnote F1}

Jul 20, 2026

John P. Connors Jr. - Director

Derivative

Common Stock

33,181

-^{footnote F1}

Jul 20, 2026

John P. Connors Jr. - Director

Derivative

Common Stock

7,041

-^{footnote F1}

Jul 20, 2026

John P. Connors Jr. - Director

Derivative

Common Stock

841

-^{footnote F1}

Jul 20, 2026

John P. Connors Jr. - Director

Derivative

Restricted Stock Units

4,383

-^{footnote F2}

Footnote F1 (price): Pursuant to the Agreement and Plan of Merger dated as of January 31, 2026, by and among Columbia Financial, Inc., a Delaware corporation, Columbia Financial, Inc., a Maryland corporation (Newco), Columbia Bank MHC and Northfield Bancorp, Inc. (Merger Agreement), at the effective… Full note on SEC EDGAR
Footnote F2 (price): Pursuant to the Merger Agreement, each restricted stock unit was converted into the right to receive 1.425 units that will be settled in cash based on the closing price of Newco common stock on the day of vesting.

Jul 20, 2026

Steven M. Klein - Officer

Derivative

Common Stock

464,261

-^{footnote F1}

Jul 20, 2026

Steven M. Klein - Officer

Derivative

Common Stock

66,997

-^{footnote F1}

Jul 20, 2026

Steven M. Klein - Officer

Derivative

Common Stock

59,119

-^{footnote F1}

Jul 20, 2026

Steven M. Klein - Officer

Derivative

Stock Options

40,000

-^{footnote F2}

Footnote F1 (price): Pursuant to the Agreement and Plan of Merger dated as of January 31, 2026, by and among Columbia Financial, Inc., a Delaware corporation, Columbia Financial, Inc., a Maryland corporation (Newco), Columbia Bank MHC and Northfield Bancorp, Inc. (Merger Agreement), at the effective… Full note on SEC EDGAR
Footnote F2 (price): Pursuant to the Merger Agreement, each outstanding and unexercised option immediately prior to the effective time of the merger, whether vested or unvested, was converted into an option exercisable for a total number of shares of Newco common stock equal to the total number of… Full note on SEC EDGAR

Jul 20, 2026

William R. Jacobs - Officer

Derivative

Common Stock

64,947

-^{footnote F1}

Jul 20, 2026

William R. Jacobs - Officer

Derivative

Common Stock

38,614

-^{footnote F1}

Jul 20, 2026

William R. Jacobs - Officer

Derivative

Common Stock

12,949

-^{footnote F1}

Jul 20, 2026

William R. Jacobs - Officer

Derivative

Restricted Stock Units

15,888

-^{footnote F2}

Footnote F1 (price): Pursuant to the Agreement and Plan of Merger dated as of January 31, 2026, by and among Columbia Financial, Inc., a Delaware corporation, Columbia Financial, Inc., a Maryland corporation (Newco), Columbia Bank MHC and Northfield Bancorp, Inc. (Merger Agreement), at the effective… Full note on SEC EDGAR
Footnote F2 (price): Pursuant to the Merger Agreement, each restricted stock unit was converted into the right to receive 1.425 units that will be settled in cash based on the closing price of Newco common stock on the day of vesting.

Jul 20, 2026

Rachana A. Kulkarni - Director

Derivative

Common Stock

18,688

-^{footnote F1}

Jul 20, 2026

Rachana A. Kulkarni - Director

Derivative

Restricted Stock Units

4,383

-^{footnote F2}

Footnote F1 (price): Pursuant to the Agreement and Plan of Merger dated as of January 31, 2026, by and among Columbia Financial, Inc., a Delaware corporation, Columbia Financial, Inc., a Maryland corporation (Newco), Columbia Bank MHC and Northfield Bancorp, Inc. (Merger Agreement), at the effective… Full note on SEC EDGAR
Footnote F2 (price): Pursuant to the Merger Agreement, each restricted stock unit was converted into the right to receive 1.425 units that will be settled in cash based on the closing price of Newco common stock on the day of vesting.

Jul 20, 2026

Karen J. Kessler - Director

Derivative

Common Stock

64,854

-^{footnote F1}

Jul 20, 2026

Karen J. Kessler - Director

Derivative

Common Stock

3,500

-^{footnote F1}

Jul 20, 2026

Karen J. Kessler - Director

Derivative

Restricted Stock Units

4,383

-^{footnote F2}

Footnote F1 (price): Pursuant to the Agreement and Plan of Merger dated as of January 31, 2026, by and among Columbia Financial, Inc., a Delaware corporation, Columbia Financial, Inc., a Maryland corporation (Newco), Columbia Bank MHC and Northfield Bancorp, Inc. (Merger Agreement), at the effective… Full note on SEC EDGAR
Footnote F2 (price): Pursuant to the Merger Agreement, each restricted stock unit was converted into the right to receive 1.425 units that will be settled in cash based on the closing price of Newco common stock on the day of vesting.

Jul 20, 2026

Robin Lefkowitz - Officer

Derivative

Common Stock

23,534

-^{footnote F1}

Jul 20, 2026

Robin Lefkowitz - Officer

Derivative

Common Stock

26,136

-^{footnote F1}

Jul 20, 2026

Robin Lefkowitz - Officer

Derivative

Common Stock

38,388

-^{footnote F1}

Jul 20, 2026

Robin Lefkowitz - Officer

Derivative

Restricted Stock Units

13,879

-^{footnote F2}

Jul 20, 2026

Robin Lefkowitz - Officer

Derivative

Stock Options

40,000

-^{footnote F3}

Footnote F1 (price): Pursuant to the Agreement and Plan of Merger dated as of January 31, 2026, by and among Columbia Financial, Inc., a Delaware corporation, Columbia Financial, Inc., a Maryland corporation (Newco), Columbia Bank MHC and Northfield Bancorp, Inc. (Merger Agreement), at the effective… Full note on SEC EDGAR
Footnote F2 (price): Pursuant to the Merger Agreement, each restricted stock unit was converted into the right to receive 1.425 units that will be settled in cash based on the closing price of Newco common stock on the day of vesting.
Footnote F3 (price): Pursuant to the Merger Agreement, each outstanding and unexercised option immediately prior to the effective time of the merger, whether vested or unvested, was converted into an option exercisable for a total number of shares of Newco common stock equal to the total number of… Full note on SEC EDGAR

Jul 14, 2026

Vickie Tomasello - Officer

Tax withholding / forfeiture

Common Stock

3,297^{footnote F1}

$14.72

$49K

Footnote F1 (shares): Represents shares sold by the Reporting Person to satisfy tax obligations in connection with the accelerated vesting of restricted stock previously issued.

Jul 14, 2026

William R. Jacobs - Officer

Tax withholding / forfeiture

Common Stock

4,118^{footnote F1}

$14.72

$61K

Footnote F1 (shares): Represents shares sold by the Reporting Person to satisfy tax obligations in connection with the accelerated vesting of restricted stock previously issued.

Jul 14, 2026

Robin Lefkowitz - Officer

Tax withholding / forfeiture

Common Stock

3,423^{footnote F1}

$14.72

$50K

Footnote F1 (shares): Represents shares sold by the Reporting Person to satisfy tax obligations in connection with the accelerated vesting of an equity award.

Jul 14, 2026

Steven M. Klein - Officer

Tax withholding / forfeiture

Common Stock

9,732^{footnote F1}

$14.72

$143K

Footnote F1 (shares): Represents shares sold by the Reporting Person to satisfy tax obligations in connection with the accelerated vesting of restricted stock previously issued.

Jul 14, 2026

David Fasanella - Officer

Tax withholding / forfeiture

Common Stock

3,905^{footnote F1}

$14.72

$57K

Footnote F1 (shares): Represents shares sold by the Reporting Person to satisfy tax obligations in connection with the accelerated vesting of restricted stock previously issued.

Mar 19, 2026

David Fasanella - Officer

Open-market purchase

Common Stock

7,500

$13.07

$98K

Mar 17, 2026

Paul Stahlin - Director

Open-market purchase

Common Stock

10,000

$13.19^{footnote F1}

$132K

Footnote F1 (price): The price reported in column 4 is a weighted average price. The shares were purchased at prices ranging from $13.13 to $13.20, inclusive. The reporting person undertakes to provide to Northfield Bancorp, Inc., any security holder of Northfield Bancorp, Inc., or the staff of the… Full note on SEC EDGAR

Feb 4, 2026

Paul Stahlin - Director

Grant or award

Restricted Stock Units

4,383

$0.00

Feb 4, 2026

Annette Catino - Director

Grant or award

Restricted Stock Units

4,383

$0.00

Feb 4, 2026

David Fasanella - Officer

Grant or award

Restricted Stock Units

15,066

$0.00

Feb 4, 2026

Frank P. Patafio - Director

Grant or award

Restricted Stock Units

4,383

$0.00

Feb 4, 2026

Gil Chapman - Director

Grant or award

Restricted Stock Units

4,383

$0.00

Feb 4, 2026

John P. Connors Jr. - Director

Grant or award

Restricted Stock Units

4,383

$0.00

Feb 4, 2026

Vickie Tomasello - Officer

Grant or award

Restricted Stock Units

12,966

$0.00

Feb 4, 2026

Robin Lefkowitz - Officer

Grant or award

Restricted Stock Units

13,879

$0.00

Feb 4, 2026

Timothy C. Harrison - Director

Grant or award

Restricted Stock Units

4,383

$0.00

Feb 4, 2026

Karen J. Kessler - Director

Grant or award

Restricted Stock Units

4,383

$0.00