X0306 4 2016-02-24 0 0001130310 CENTERPOINT ENERGY INC CNP 0001188744 CARROLL MILTON 1111 LOUISIANA HOUSTON TX 77002 1 1 0 0 Executive Chairman Common Stock 2016-02-24 4 A 0 29825 18.86 A 207038 D Time-based restricted stock units vesting in February 2019 if the Reporting Person continues to be an employee of Issuer from the grant date through the vesting date and on a pro-rata basis in the event of his earlier retirement, disability or death. Total includes (i) 15,190 time-based restricted stock units previously awarded under the Issuer's Long-term Incentive Plan ("LTIP") and vesting in February 2017 if the Reporting Person continues to be an employee of Issuer from the grant date through the vesting date and on a pro-rata basis in the event of his earlier retirement, disability or death, (ii) 16,660 time-based restricted stock units previously awarded under the LTIP and vesting in February 2018 if the Reporting Person continues to be an employee of Issuer from the grant date through the vesting date and on a pro-rata basis in the event of his earlier retirement, disability or death, and (iii) 60,000 shares previously awarded under the LTIP and vesting in 30,000 share increments in each of June 2016 and June 2017 in connection with and contingent on his service as Executive Chairman of the Issuer on the respective vesting dates. Vincent A. Mercaldi, Attorney-in-Fact 2016-02-26