X0306 4 2019-06-04 0 0001667161 Randolph Bancorp, Inc. RNDB 0001675927 Foresta Thomas A. C/O RANDOLPH BANCORP, INC. 10 CABOT PLACE STOUGHTON MA 02072 0 1 0 0 Senior Vice President and CIO Common Stock 2019-06-04 4 P 0 569 14.97 A 10669 I By IRA Common Stock 2019-06-06 4 P 0 4431 15.00 A 15100 I By IRA Common Stock 725 I ESOP Updated to reflect the most recent year's allocation of shares. /s/ Michael K. Devlin 2019-06-06