X0306 4 2015-12-31 1 0001501364 United Financial Bancorp, Inc. UBNK 0001526530 Santarelli Marino J UNITED FINANCIAL BANCORP, INC. 45 GLASTONBURY BOULEVARD GLASTONBURY CT 06033 0 1 0 0 Executive Vice President Common Stock 3144.1466 I By United Bank 401(k) Plan Common Stock 2015-12-31 4 F 0 819 13.57 D 29001.6334 D Common Stock 2015-12-31 4 F 0 2457 13.57 D 26544.6334 D Stock Options 9.71 2011-08-05 2021-07-18 Common Stock 22260 22260 D Stock Options 10.99 2012-06-21 2022-06-21 Common Stock 22552 22552 D Stock Options 10.99 2012-06-21 2022-06-21 Common Stock 63536 63536 D Stock Options 13.25 2013-06-21 2023-06-21 Common Stock 6730 6730 D Stock Options 13.25 2013-06-21 2023-06-21 Common Stock 20192 20192 D Stock Options 13.73 2015-06-20 2024-06-20 Common Stock 4376 4376 D Stock Options 13.73 2015-06-20 2024-06-20 Common Stock 13129 13129 D Shares allocated to the account of Mr. Santarelli under the United Bank 401(k) Plan, of which all shares are vested as of December 31, 2015. Includes 2,951 restricted shares granted pursuant to the Rockville Financial, Inc. 2006 Stock Incentive Award Plan. The original grant of 4,505 shares vest in equal 20% increments, the first 20% became vested on August 5, 2011 and the subsequent vesting will occur on each annual anniversary of his hire date of July 18, 2011. Pursuant to the Agreement and Plan of Merger, dated November 14, 2013, at legal close on April 30, 2014, all shares became 100% vested. The reported number of shares is net of 1,554 shares withheld by the Issuer for tax withholding purposes. Includes 11,743 restricted shares granted pursuant to the Rockville Financial, Inc.'s 2012 Stock Incentive Plan. The original grant of 17,783 shares will vest in four equal annual installments of 25%, with the first installment to vest on June 21, 2012 and an additional 25% to vest on each annual anniversary of the grant date thereafter. Pursuant to the Agreement and Plan of Merger, dated November 14, 2013, at legal close on April 30, 2014, all shares became 100% vested. The reported number of shares is net of 6,040 shares withheld by the Issuer for tax withholding purposes. Includes 3,907 restricted stock granted pursuant to the Rockville Financial, Inc.'s 2012 Stock Incentive Plan. Pursuant to the Agreement and Plan of Merger, dated November 14, 2013, at legal close on April 30, 2014, the original grant of 5,928 performance shares became 100% vested at target. The reported number of shares is net of 2,021 shares withheld by the Issuer for tax withholding purposes. Includes 1,220 Shares of Restricted Stock granted pursuant to the Rockville Financial, Inc.'s 2012 Stock Incentive Plan. The original grant of 1,849 shares will vest in four equal annual installments of 25%, with the first installment to vest on June 21, 2013 and an additional 25% to vest on each annual anniversary of the grant date thereafter. Pursuant to the Agreement and Plan of Merger, dated November 14, 2013, at legal close on April 30, 2014, all shares became 100% vested. The reported number of shares is net of 629 shares withheld by the Issuer for tax withholding purposes. Includes 1,218 restricted stock granted pursuant to the Rockville Financial, Inc.'s 2012 Stock Incentive Plan. Pursuant to the Agreement and Plan of Merger, dated November 14, 2013, at legal close on April 30, 2014, the original grant of 1,849 performance shares became 100% vested at target. The reported number of shares is net of 631 shares withheld by the Issuer for tax withholding purposes. Includes 1,391 restricted shares granted pursuant to the Rockville Financial, Inc. 2012 Stock Incentive Plan. The original grant of 2,499 shares vest in equal 33% increments over a three year period, the first 33% vesting on June 20, 2015 and the subsequent vestings on each annual anniversary of the grant date thereafter. The reported number of shares is less 1,108 shares withheld by the Issuer for tax withholding purposes. Includes 2,541 restricted stock shares granted pursuant to the Rockville Financial, Inc.'s 2012 Stock Incentive Plan. The reported number of shares is net of 2,457 shares withheld by the Issuer for tax withholding purposes. Transaction represents shares withheld by the Issuer for tax withholding purposes with respect to the vesting of Restricted Stock previously issued to the Reporting Person by the Issuer June 21, 2014 under its 2012 Stock Incentive Plan Stock options granted pursuant to the Rockville Financial, Inc. 2006 Stock Incentive Award Plan and are exercisable in equal 20% increments, the first 20% became exercisable on August 5, 2011 and the subsequent vesting on each annual anniversary of his hire date of July 18, 2011. Pursuant to the Agreement and Plan of Merger, dated November 14, 2013, at legal close on April 30, 2014, all options became 100% vested and exercisable. Stock options granted pursuant to the Rockville Financial, Inc.'s 2006 Stock Incentive Award Plan and will become exercisable in five equal annual installments of 20%, with the first installment to vest on the grant date and an additional 20% to vest on each annual anniversary of the grant date thereafter. Pursuant to the Agreement and Plan of Merger, dated November 14, 2013, at legal close on April 30, 2014, all options became 100% vested and exercisable. Stock options granted pursuant to the Rockville Financial, Inc.'s 2012 Stock Incentive Plan and will become exercisable in four equal annual installments of 25%, with the first installment to vest on the grant date and an additional 25% to vest on each annual anniversary of the grant date thereafter. Pursuant to the Agreement and Plan of Merger, dated November 14, 2013, at legal close on April 30, 2014, all options became 100% vested and exercisable. Stock options granted pursuant to the Rockville Financial, Inc.'s 2006 Stock Incentive Award Plan and will become exercisable in five equal annual installments of 20%, with the first installment to vest at the one year anniversary of the the grant date and an additional 20% to vest on each annual anniversary of the grant date thereafter. Stock options granted pursuant to the Rockville Financial, Inc.'s 2012 Stock Incentive Plan and will become exercisable in four equal annual installments of 25%, with the first installment to vest at the one year anniversary of the grant date and an additional 25% to vest on each annual anniversary of the grant date thereafter. /s/ Eric R. Newell by POA 2016-01-06