X0306 4 2018-06-05 0000812348 CENTURY BANCORP INC CNBKA 0001246238 SLOANE BARRY R 400 MYSTIC AVENUE MEDFORD MA 02155 1 1 CEO and President 401(k) Company Stock Fund 2018-06-05 4 P 0 2.3348 136.67 A 1588.7875 D Class A Common 3111.1429 D Class A Common 40.2857 I Fbo Marshall M. Sloane II Class A Common 72.282 I Owned By Spouse Candace Lapidus Sloane The 401k Stock Fund consists of units having a share and a cash component. The price shown is that of a unit. /s/ William P. Hornby, Attorney-In-Fact 2018-06-06