X0202 4 2005-04-01 0 0001062379 KEYSPAN CORP KSE 0001195021 PULEO LENORE F ONE METROTECH CENTER BROOKLYN NY 11201 0 1 0 0 Executive Officer Deferred Stock Unit 2005-04-01 4 A 0 3064 39.05 A Common Stock 3064 246696 D Deferred Stock Unit 2005-04-01 4 A 0 613 39.05 A Common Stock 613 247309 D The security converts to Keyspan common stock on a one-for-one basis. The reporting person received deferred stock units pursuant to the Officers Deferred Stock Unit Plan by deferring a portion of their award pursuant to the Annual Incentive Compensation Plan. The deferred stock units are payable in KeySpan common stock upon retirement or resignation. The reporting person received deferred stock units based upon a 20% match provided by the Company. These deferred stock units track the performance of the Company's common stock and are payable in cash upon retirement, disabilty, death, change in control, but not resignation. /s/Colleen A. Meade, as Attorney in Fact 2005-04-05