X0306 4 2018-02-19 0000874761 AES CORP AES 0001538176 O'Flynn Thomas M. 4300 WILSON BOULEVARD ARLINGTON VA 22203 1 EVP and CFO Common Stock 2018-02-19 4 F 0 4963 10.45 D 292318 D Common Stock 2018-02-20 4 F 0 3376 10.40 D 288942 D Common Stock 9242 I by 401(k) Reflects tax withholding in connection with the vesting and settlement of one-third of the Restricted Stock Units ("RSUs") granted February 19, 2016. There was no transaction in the market. Reflects tax withholding in connection with the vesting and settlement of one-third of the RSUs granted February 20, 2015. There was no transaction in the market. Since the last Form 4 filing in which such shares were reported on February 2, 2018, the reporting person acquired 214 additional shares of AES Common Stock pursuant to The AES Corporation Retirement Savings Plan. The information in this report is based on a plan statement dated February 21, 2018. /s/ Thomas M. O'Flynn 2018-02-21