Robert Yu Lang Mao - 09 Aug 2022 Form 4 Insider Report for Energy Recovery, Inc. (ERII)

Role: President and CEO, Director
Signature: /s/ William Yeung, Attorney-in-Fact for Robert Yu Lang Mao
Issuer symbol: ERII
Transactions as of: 09 Aug 2022
Net transactions value: -$44,927
Form type: 4
Filing time: 11 Aug 2022, 17:59:26 UTC
Previous filing: 01 Feb 2022
Next filing: 01 Feb 2023
SEC: View on sec.gov

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	ERII	Common Stock	Options Exercise	$10,860	+2,000		$5.43	2,000	09 Aug 2022	Direct
transaction	ERII	Common Stock	Sale	$44,927	-2,000	-100%	$22.46	0	09 Aug 2022	Direct
transaction	ERII	Common Stock	Options Exercise	$82,731	+15,236		$5.43	15,236	10 Aug 2022	Direct
holding	ERII	Common Stock						64,042	09 Aug 2022	Limited Purpose Trust
holding	ERII	Common Stock						32,166	09 Aug 2022	The Robert and Iran Mao Rev Trust DTD 04-06-2006

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
transaction	ERII	Stock Option (Right to Buy)	Options Exercise	$10,860	-2,000	-12%	$5.43	15,236	09 Aug 2022	Common Stock	2,000	$5.43	Direct	F1
transaction	ERII	Stock Option (Right to Buy)	Options Exercise	$82,731	-15,236	-100%	$5.43	0	10 Aug 2022	Common Stock	15,236	$5.43	Direct	F1

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	This stock option was granted on 9/3/2013. All the options are fully vested and exercisable on the date of the 2014 Shareholder Meeting.

Remarks:

Exhibit 24