X0306 4 2016-02-24 0 0001130310 CENTERPOINT ENERGY INC CNP 0001268627 ORTENSTONE SUSAN B 1111 LOUISIANA HOUSTON TX 77002 0 1 0 0 SVP and Chief HR Officer Common Stock 2016-02-24 4 A 0 6562 18.86 A 15132 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 her earlier retirement, disability or death. Total includes (i) 3,740 time-based restricted stock units previously awarded under the Issuer's Long-term Incentive Plan and vesting in February 2017 and (ii) 4,830 time-based restricted stock units previously awarded under the Issuer's Long-term Incentive Plan and vesting in February 2018. Each award shall vest 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 her earlier retirement, disability or death. Vincent A. Mercaldi, Attorney-in-Fact 2016-02-26