X0306 4 2020-02-14 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 2020-02-14 4 A 0 6348 0 A 78270 D Stock Option (Right to Buy) 23.63 2020-02-14 4 A 0 24773 0 A 2030-02-14 Common Stock 24773 24773 D The reported transaction is an award of 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, January 1, 2023 and January 1, 2024 and settle within 30 days of the applicable vesting date. This amount includes 13,748 unvested restricted stock units in respect of the issuer's common stock. Of these restricted stock units, 6,348 are scheduled to vest as described in footnote 1 to this Form 4 and 7,400 are scheduled to vest, subject to the reporting person's continued employment with the issuer through the applicable vesting date, 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. Subject to the reporting person's continued employment with the issuer through the applicable vesting date, this option is scheduled to vest in equal installments on each of January 1, 2021, January 1, 2022, January 1, 2023 and January 1, 2024. /s/ John DiMascio, Attorney-in-Fact for Anthony Webster 2020-02-19