NFBK

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

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

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

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

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

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 Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote (1) to this Form 4.

Each restricted stock unit represents a contingent right to receive cash equal to the value of one share of Issuer common stock on date of vesting.

Award vests one year from the date of grant.

Each restricted stock unit represents a contingent right to receive cash equal to the value of one share of Issuer common stock on date of vesting.

Award vests one year from the date of grant.

Each restricted stock unit represents a contingent right to receive cash equal to the value of one share of Issuer common stock on date of vesting.

Restricted stock units vest in three equal annual installments beginning one year following the date of grant.

Each restricted stock unit represents a contingent right to receive cash equal to the value of one share of Issuer common stock on date of vesting.

Award vests one year from the date of grant.

Each restricted stock unit represents a contingent right to receive cash equal to the value of one share of Issuer common stock on date of vesting.

Award vests one year from the date of grant.

Each restricted stock unit represents a contingent right to receive cash equal to the value of one share of Issuer common stock on date of vesting.

Award vests one year from the date of grant.

Each restricted stock unit represents a contingent right to receive cash equal to the value of one share of Issuer common stock on date of vesting.

Restricted stock units vest in three equal annual installments beginning one year following the date of grant.

Each restricted stock unit represents a contingent right to receive cash equal to the value of one share of Issuer common stock on date of vesting.

Restricted stock units vest in three equal annual installments beginning one year following the date of grant.

Each restricted stock unit represents a contingent right to receive cash equal to the value of one share of Issuer common stock on date of vesting.

Restricted stock units vest in three equal annual installments beginning one year following the date of grant.

Each restricted stock unit represents a contingent right to receive cash equal to the value of one share of Issuer common stock on date of vesting.

Award vests one year from the date of grant.

Each restricted stock unit represents a contingent right to receive cash equal to the value of one share of Issuer common stock on date of vesting.

Award vests one year from the date of grant.

Each restricted stock unit represents a contingent right to receive cash equal to the value of one share of Issuer common stock on date of vesting.

Award vests one year from the date of grant.

Represents shares sold by the Reporting Person to satisfy tax obligations in connection with an exercise of stock appreciation rights.

Represents shares sold by the Reporting Person to satisfy tax obligations in connection with an exercise of stock appreciation rights.

Represents shares sold by the Reporting Person to satisfy tax obligations in connection with an exercise of stock appreciation rights.

Represents shares sold by the Reporting Person to satisfy tax obligations in connection with an exercise of stock appreciation rights.

Represents shares sold by the Reporting Person to satisfy tax obligations in connection with an exercise of stock appreciation rights.

Represents shares sold by the Reporting Person to satisfy tax obligations in connection with an exercise of stock appreciation rights.

Represents shares sold by the Reporting Person to satisfy tax obligations in connection with the vesting of an equity award.

Represents shares sold by the Reporting Person to satisfy tax obligations in connection with the vesting of an equity award.

Represents shares sold by the Reporting Person to satisfy tax obligations in connection with the vesting of an equity award.

Represents shares sold by the Reporting Person to satisfy tax obligations in connection with the vesting of an equity award.

Represents shares sold by the Reporting Person to satisfy tax obligations in connection with the vesting of an equity award.

Represents shares sold by the Reporting Person to satisfy tax obligations in connection with the vesting of an equity award.

Represents shares sold by the Reporting Person to satisfy tax obligations in connection with the vesting of an equity award.

Represents shares sold by the Reporting Person to satisfy tax obligations in connection with the vesting of an equity award.

The price reported in column 4 is a weighted average price. The shares were sold at prices ranging from $10.13 to $10.14, inclusive. The reporting person undertakes to provide to Northfield Bancorp, Inc., any security holder of Northfield Bancorp, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote (1) to this Form 4.

The price reported in column 4 is a weighted average price. The shares were sold at prices ranging from $11.80 to $11.98, inclusive. The reporting person undertakes to provide to Northfield Bancorp, Inc., any security holder of Northfield Bancorp, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote (1) to this Form 4.

Represents shares withheld by the Issuer to satisfy tax obligations.

Represents shares withheld by the Issuer to satisfy tax obligations.

Represents shares withheld by the Issuer to satisfy tax obligations.

Represents shares withheld by the Issuer to satisfy tax obligations.

Represents shares withheld by the Issuer to satisfy tax obligations.

Represents shares withheld by the Issuer to satisfy tax obligations.

Represents shares withheld by the Issuer to satisfy tax obligations.

Represents shares withheld by the Issuer to satisfy tax obligations.

Represents shares withheld by the Issuer to satisfy tax obligations.

Represents shares withheld by the Issuer to satisfy tax obligations.

Represents shares withheld by the Issuer to satisfy tax obligations.