NATIONAL GRID USA SERVICE COMPANY, INC.

KEYSPAN BENEFIT PLAN FOR ACTIVE UNION EMPLOYEES

GROUP INSURANCE

NIAGARA MOHAWK MEDICAL, PRESCRIPTION DRUG, AND LIFE INSURANCE PLAN FOR RETIRED FORMER REPRESENTED EMPL

NATIONAL GRID BENEFIT PLAN FOR CERTAIN RETIRED MANAGEMENT EMPLOYEES OF NEW YORK COMPANIES

KEYSPAN BENEFIT PLAN FOR ACTIVE MANAGEMENT EMPLOYEES

KEYSPAN BENEFIT PLAN FOR RETIRED EAST UNION EMPLOYEES

NATIONAL GRID USA COMPANIES' RETIREES HEALTH AND LIFE INSURANCE PLAN I

KEYSPAN BENEFIT PLAN FOR RETIRED WEST UNION EMPLOYEES

ACTIVE EMPLOYEES HEALTHCARE

NIAGARA MOHAWK MEDICAL, PRESCRIPTION DRUG, AND LIFE INSURANCE PLAN FOR RETIRED FORMER NON-REPRESENTED

NATIONAL GRID BENEFIT PLAN FOR CERTAIN RETIRED MANAGEMENT AND UNION EMPLOYEES OF MASSACHUSETTS GAS COMPANIES

NATIONAL GRID USA COMPANIES' RETIREES HEALTH AND LIFE INSURANCE PLAN II

KEYSPAN LIFE INSURANCE PLAN FOR RETIRED EAST MANAGEMENT EMPLOYEES

KEYSPAN BENEFIT PLAN FOR RETIRED BOSTON GAS COMPANY MANAGEMENT EMPLOYEES

KEYSPAN BENEFIT PLAN FOR RETIRED COLONIAL GAS MANAGEMENT & UNION EMPLOYEES

KEYSPAN MEDICAL PLAN FOR RETIRED EAST MANAGEMENT EMPLOYEES

KEYSPAN BENEFIT PLAN FOR RETIRED ESSEX GAS MGMT

KEYSPAN BENEFIT PLAN FOR RETIRED ESSEX GAS UNION

DISABILITY RETIREMENT AND SEPARATION ALLOWANCE PLAN

KEYSPAN MANAGEMENT CHANGE OF CONTROL SEVERANCE PLAN

KEYSPAN UNION SEVERANCE PLAN

KEYSPAN BENEFIT PLAN FOR RETIRED ENERGYNORTH MGMT EMPLOYEES

KEYSPAN BENEFIT PLAN FOR RETIRED ENERGYNORTH UNION EMPLOYEES