Robert Yu Lang Mao - Nov 8, 2023 Form 4 Insider Report for Energy Recovery, Inc. (ERII)

Role: Director
Signature: /s/ William Yeung, Attorney-in-Fact for Robert Yu Lang Mao
Stock symbol: ERII
Transactions as of: Nov 8, 2023
Transactions value $: $595,955
Form type: 4
Date filed: 11/13/2023, 05:01 PM
Previous filing: Nov 8, 2023
Next filing: Mar 4, 2024
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	$208K	+26.7K	+25.49%	$7.79	131K	Nov 8, 2023	Direct
transaction	ERII	Common Stock	Options Exercise	$300K	+38.5K	+29.36%	$7.79	170K	Nov 8, 2023	Direct
transaction	ERII	Common Stock	Options Exercise	$88K	+6.31K	+3.71%	$13.96	176K	Nov 8, 2023	Direct
holding	ERII	Common Stock						96.2K	Nov 8, 2023	The Robert and Iran Mao Rev Trust DTD 04-06-2006

Showing 1 to 4 of 4 entries

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	Employee Stock Option (Right to Buy)	Options Exercise	$0	-26.7K	-44.98%	$0.00	32.6K	Nov 8, 2023	Common Stock	26.7K	$7.79	Direct	F1
transaction	ERII	Employee Stock Option (Right to Buy)	Options Exercise	$0	-38.5K	-84.09%	$0.00	7.29K	Nov 8, 2023	Common Stock	38.5K	$7.79	Direct	F2
transaction	ERII	Employee Stock Option (Right to Buy)	Options Exercise	$0	-6.31K	-8.99%	$0.00	63.8K	Nov 8, 2023	Common Stock	6.31K	$13.96	Direct	F3

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

Explanation of Responses:

Id	Content
F1	The stock option (Grant #1315) was granted on May 20, 2020.
F2	The stock option (Grant #1316) was granted on May 20, 2020.
F3	The stock option (Grant #1567) was granted on February 1, 2021.

Remarks:

Exhibit 24