X0306 4 2016-11-30 0 0001667161 Randolph Bancorp, Inc. RNDB 0001675908 Trubiano Louis J. C/O RANDOLPH BANCORP, INC. 10 CABOT PLACE STOUGHTON MA 02072 1 0 0 0 Common Stock 2016-11-30 4 P 0 10000 14.9869 A 35000 D Represents a weighted average purchase price per share. These shares were purchased in multiple transactions at prices ranging from $14.91 to $14.99. The Reporting Person has provided the Issuer, and undertakes to provide to the staff of the Securities and Exchange Commission or any security holder of the Issuer, upon request, full information regarding the number of shares purchased at each separate price within the range. /s/ Michael K. Devlin 2016-12-01