X0306 4 2018-11-28 0 0001049782 BROOKLINE BANCORP INC BRKL 0001753598 Chang Joanne B. 131 CLARENDON STREET BOSTON MA 02116 1 0 0 0 Common Stock 2018-11-28 4 P 0 100 15.10 A 100 D The price reported in Column 4 is a weighted average price. The shares were purchased in multiple transactions at prices ranging from $15.10 to $15.11, inclusive. The reporting person undertakes to provide to Brookline Bancorp, Inc., any security holder of Brookline Bancorp, Inc., or the staff of the Securities and Exchange Commission upon request, full information regarding the number of shares purchased at each separate price within the ranges set forth in footnote(1) to this form 4. Joanne B. Chang by Marissa S. Frerk, P.O.A. 2018-11-28