X0306 4 2017-12-01 0 0001130310 CENTERPOINT ENERGY INC CNP 0001526699 Prochazka Scott M 1111 LOUISIANA HOUSTON TX 77002 1 1 0 0 President & CEO Common Stock 2017-12-01 4 S 0 1000 29.39 D 245466 D Common Stock 6700 I By Savings Plan The sale of shares reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person. The adoption of the trading plan was previously disclosed by the Issuer in its Current Report on Form 8-K filed with Securities and Exchange Commission on March 28, 2017. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $29.09 to $29.84, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote. Total includes (i) 37,480 time-based restricted stock units previously awarded under the Issuer's Long-term Incentive Plan and vesting in February 2018, (ii) 63,258 time-based restricted stock units previously awarded under the Issuer's Long-term Incentive Plan and vesting in February 2019, and (iii) 54,115 time-based restricted stock units previously awarded under the Issuer's Long-term Incentive Plan and vesting in February 2020. Each of the above awards 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 his earlier retirement, disability or death. Equivalent shares held in CenterPoint Energy, Inc. Savings Plan. By Vincent A. Mercaldi, Attorney-in-Fact 2017-12-05