Sec Form 4 Filing - Kucia Mark A @ United Financial Bancorp, Inc. - 2019-03-11

FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person Kucia Mark A 2. Issuer Name and Ticker or Trading Symbol United Financial Bancorp, Inc. [ UBNK] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner X __ Officer (give title below) _____ Other (specify below) EVP (Last) (First) (Middle) UNITED FINANCIAL BANCORP, INC., 225 ASYLUM STREET 3. Date of Earliest Transaction (MM/DD/YY) 03/11/2019 (Street) HARTFORD, CT06103 4. If Amendment, Date Original Filed (MM/DD/YY) 6. Individual or Joint/Group Filing (Check Applicable Line) __ X __ Form filed by One Reporting Person _____ Form filed by More than One Reporting Person (City) (State) (Zip)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned 1.Title of Security (Instr. 3) 2. Transaction Date (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Common Stock 03/11/2019 M 9,479 A $ 6.09 79,711.9286 D ( 1 ) ( 2 ) ( 3 ) ( 4 ) ( 5 ) ( 6 ) ( 7 ) ( 8 ) ( 9 ) ( 10 ) ( 11 ) ( 12 ) ( 13 ) ( 14 ) ( 15 ) ( 16 ) ( 17 ) ( 18 ) Common Stock 28,998.035 I ( 19 ) By United Bank 401(k) Plan

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities) 1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5) 6. Date Exercisable and Expiration Date (MM/DD/YY) 7. Title and Amount of Underlying Securities (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4) Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares Stock Options ( 20 ) $ 10.99 06/21/2012 06/21/2022 Common Stock 63,536 63,536 D Stock Options ( 21 ) $ 7.42 11/15/2010 11/15/2020 Common Stock 5,187 5,187 D Stock Options ( 22 ) $ 10.99 06/21/2012 06/21/2022 Common Stock 22,552 22,552 D Stock Options ( 20 ) $ 13.25 06/21/2013 06/21/2023 Common Stock 4,945 4,945 D Stock Options ( 23 ) $ 9.5 09/02/2011 09/02/2021 Common Stock 15,091 15,091 D Stock Options ( 24 ) $ 6.09 03/11/2019 X 9,479 03/16/2009 03/16/2019 Common Stock 9,479 $ 6.09 0 D Stock Options ( 22 ) $ 13.25 06/21/2013 06/21/2023 Common Stock 14,835 14,835 D Stock Options ( 25 ) $ 13.73 06/20/2015 06/20/2024 Common Stock 9,566 9,566 D Stock Options ( 26 ) $ 13.73 06/20/2015 06/20/2024 Common Stock 3,188 3,188 D

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Kucia Mark A UNITED FINANCIAL BANCORP, INC. 225 ASYLUM STREET HARTFORD, CT06103 EVP Signatures /s/ Marliese L Shaw by POA 03/13/2019 Signature of Reporting Person Date

Explanation of Responses:

( 1 )Includes 3,908 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 2,020 shares withheld by the Issuer for tax withholding purposes. ( 2 )Includes 5,386 restricted stock shares granted pursuant to the United Financial Bancorp, Inc. 2015 Omnibus Stock Incentive Plan and cliff vest on December 31, 2018, if, and only if, United Financial Bancorp, Inc. meets certain performance goals. ( 3 )Includes 3,580 restricted shares granted pursuant to the United Financial Bancorp, Inc. 2015 Omnibus Stock Incentive Plan. The Original grant of 5,386 shares vest in equal 33% increments over a three year period, the first 33% vesting on November 18, 2016 and the subsequent vesting on each annual anniversary of the grant date thereafter. The reported number is net of 1,806 shares withheld by the Issuer for tax withholding purposes. ( 4 )Includes 1,915 restricted shares granted pursuant to the Rockville Financial, Inc. 2006 Stock Incentive Award Plan. The original grant of 2,976 shares vest in equal 20% increments over a five year period, the first 20% vesting on September 2, 2011 and the subsequent vesting on each annual anniversary of that date. 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 1,061 shares withheld by the Issuer for tax withholding purposes. ( 5 )Includes 895 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 1,358 performance shares became 100% vested at target. The reported number of shares is net of 463 shares withheld by the Issuer for tax withholding purposes. ( 6 )Includes 1,789 shares of restricted stock granted pursuant to the Rockville Financial, Inc.'s 2012 Stock Incentive Plan. The original grant of 3,641 shares cliff vested on June 30, 2017, if and only if, United Financial Bancorp, Inc. meets certain performance goals. Not all requirements were met, and as a result, this transaction represents the distribution of the original 3,641 granted shares decreased by 911 shares for not meeting those performance requirements. The reported number of shares is net of 941 shares withheld by the Issuer for tax withholding purposes. ( 7 )Includes 2,640 restricted shares granted pursuant to the United Financial Bancorp, Inc. 2015 Omnibus Stock Incentive Plan. The original grant of 3,389 shares vest in equal 33% increments over a three year period, the first 33% vesting on November 22, 2017 and the subsequent vesting on each annual anniversary of the grant date thereafter. The reported number of shares is net of 749 shares withheld by the Issuer for tax withholding purposes. ( 8 )Includes 891 Shares of Restricted Stock granted pursuant to the Rockville Financial, Inc.'s 2012 Stock Incentive Plan. The original grant of 1,358 shares 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 467 shares withheld by the Issuer for tax withholding purposes. ( 9 )Includes 1,186 restricted shares granted pursuant to the Rockville Financial, Inc. 2012 Stock Incentive Plan. The original grant of 1,820 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 anniversary of the grant date in following years. The reported number of shares is net of 634 shares withheld by the Issuer for tax withholding purposes. ( 10 )Includes 1,969 shares of restricted stock granted pursuant to the Rockville Financial, Inc. 2006 Stock Incentive Award Plan. The original grant of 2,000 shares (x 1.5167 exchange ratio become 3,033 shares) will become vested in equal 20% increments over a five year period, the first 20% vesting on March 16, 2009 and the subsequent vesting on each annual anniversary of that date. The reported number of shares is net of 1,064 shares (302 x 1.5167 exchange ratio became 458 shares in March 2011, plus 606 shares since that time) withheld by the Issuer for tax withholding purposes. ( 11 )Includes 11,753 restricted shares granted pursuant to the Rockville Financial, Inc.'s 2012 Stock Incentive Plan. The original grant of 17,783 shares 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 6,030 shares withheld by the Issuer for tax withholding purposes. ( 12 )Includes 1,981 shares of restricted stock granted pursuant to the Rockville Financial, Inc. 2006 Stock Incentive Award Plan. The original grant of 2,000 shares (x 1.5167 exchange ratio become 3,033 shares) vest in equal 20% increments over a five year period, the first 20% vesting on November 15, 2010 and the subsequent vesting on each annual anniversary of that date. 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 1,052 shares (103 x 1.5167 exchange ratio became 156 shares in March 2011, plus 896 shares since that time) withheld by the Issuer for tax withholding purposes. ( 13 )Includes 3,389 restricted stock shares granted pursuant to the United Financial Bancorp, Inc. 2015 Omnibus Stock Incentive Plan and cliff vest on December 31, 2019, if, and only if, United Financial Bancorp, Inc. meets certain performance goals. ( 14 )Includes 3,856 shares of restricted stock granted pursuant to the Rockville Financial, Inc. 2006 Stock Incentive Award Plan. The original grant of 4,000 shares (x 1.5167 exchange ratio become 6,066 shares) will become exercisable in equal 20% increments over a five year period, the first 20% becoming exercisable on February 20, 2008 and the subsequent vesting on each annual anniversary of that date. The reported number of shares is net of 2,210 shares (1,188 x 1.5167 exchange ratio became 1,801 shares in March 2011. Plus 409 shares since that time) withheld by the Issuer for tax withholding purposes. ( 15 )Includes 3,475 restricted shares granted pursuant to the United Financial Bancorp, Inc. 2015 Omnibus Stock Incentive Plan. The original grant of 3,884 shares vest in equal 33% increments over a three year period, the first 33% vesting on November 22, 2018 and the subsequent vesting on each annual anniversary of the grant date thereafter. The reported number is net of 409 shares withheld by the Issuer for tax withholding purposes. ( 16 )Includes 3,185 restricted stock shares granted pursuant to the United Financial Bancorp, Inc. 2015 Omnibus Stock Incentive Plan and cliff vest on December 31, 2020, if, and only if, United Financial Bancorp, Inc. meets certain performance goals. ( 17 )Includes 3,809 restricted shares granted pursuant to the United Financial Bancorp, Inc. 2015 Omnibus Stock Incentive Plan. The original grant of 3,809 shares vest in equal 33% increments over a three year period, the first 33% vesting on November 19, 2019 and the subsequent vesting on each annual anniversary of the grant date thereafter. ( 18 )Includes 3,809 restricted stock shares granted pursuant to the United Financial Bancorp, Inc. 2015 Omnibus Stock Incentive Plan and cliff vest on December 31, 2021, if, and only if, United Financial Bancorp, Inc. meets certain performance goals. ( 19 )Shares allocated to the account of Mr. Kucia under the United Bank 401(k) Plan, of which all shares are vested. ( 20 )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. ( 21 )Stock options granted pursuant to the Rockville Financial, Inc. 2006 Stock Incentive Award Plan and will become exercisable in equal 20% increments over a five year period, the first 20% becoming exercisable on November 15, 2010 and the subsequent vesting on each annual anniversary of that date. 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. ( 22 )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. ( 23 )Stock options granted pursuant to the Rockville Financial, Inc. 2006 Stock Incentive Award Plan and will become exercisable in equal 20% increments over a five year period, the first 20% becoming exercisable on September 2, 2011 and the subsequent vesting on each annual anniversary of that date. 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. ( 24 )Stock options granted pursuant to the Rockville Financial, Inc. 2006 Stock Incentive Award Plan and will become exercisable in equal 20% increments over a five year period, the first 20% becoming exercisable on March 16, 2009 and the subsequent vesting on each annual anniversary of that date. ( 25 )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. ( 26 )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 grant date and an additional 20% to vest on each annual anniversary of the grant date thereafter.

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