X0306 4 2020-02-07 0001604643 Evoqua Water Technologies Corp. AQUA 0001720191 Webster Anthony EVOQUA WATER TECHNOLOGIES CORP. 210 SIXTH AVENUE PITTSBURGH PA 15222 true Executive Vice President, CHRO Common Stock 2020-02-07 4 M 0 50000 6.49 A 121922 D Common Stock 2020-02-07 4 S 0 50000 24.2188 D 71922 D Stock Option (Right to Buy) 6.49 2020-02-07 4 M 0 50000 0 D 2026-03-03 Common Stock 50000 254361 D This amount includes 7,400 unvested restricted stock units in respect of the issuer's common stock. Subject to the reporting person's continued employment with the issuer through the applicable vesting date, these restricted stock units are scheduled to vest in equal installments on each of January 1, 2021, January 1, 2022 and January 1, 2023 and settle within 30 days of the applicable vesting date. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $24.12 to $24.235, inclusive. The reporting person undertakes to provide 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 range set forth in this footnote. This option is vested with respect to 218,770 underlying shares (including the 50,000 shares underlying the portion of the stock option being exercised) and will vest with respect to the remaining 85,591 underlying shares on March 1, 2020. /s/ John DiMascio, Attorney-in-Fact for Anthony Webster 2020-02-10