X0201 4 2003-07-31 0 0001099517 PORT FINANCIAL CORP PORT 0001254719 KEEGAN JAMES B C/O PORT FINANCIAL CORP 1380 SOLDIERS FIELD RD BRIGHTON MA 02136 1 1 0 0 Chief Executive Officer Common Stock 2003-07-31 4 D 0 72766 54 D 0 D Common Stock 2003-07-31 4 D 0 30372 54 D 0 I see note Stock Option (Right to Buy) 15.875 2003-07-31 4 D 0 110000 0 D 2003-07-01 2010-10-18 Common Stock 110000 0 D Reflects 14,000 shares in the Port Financial Corp. Officer's Plan, 14,700 shares in the SBERA 401(k) Plan as adopted by Cambridgeport Bank and 1,672 shares held in the Port Financial Corp. Employee Stock Ownership Plan. All options vested as of July 1, 2003 pursuant to the accelerated vesting provisions of the option agreement for changes in control. The options were cancelled in connection with the merger of Mustang Acquisition Corp., a wholly owned subsidiary of Citizens Bank of Massachusetts, and Port Financial Corp. in exchange for a cash payment of $4,193,750, representing the difference between the exercise price of the option and the market value of the underlying Port Financial Corp. common stock on the effective date of the merger. /s/ Jane L. Lundquist for James B. Keegan 2003-07-31