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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1421517	Energy Recovery Inc.	ERII	()	4

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1232218	Lang Yu Robert Mao	C/O Energy Recovery, Inc. 1717 Doolittle Drive San Leandro CA 94577		Yes	No	No	No

Reported Non-Derivative Transactions

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership
Common Stock	Acquisiton	2024-05-22	21,859	$7.79	251,936	No	4	M	Direct
Common Stock	Acquisiton	2024-05-22	5,208	$7.79	257,144	No	4	M	Direct
Common Stock	Disposition	2024-05-22	21,045	$13.86	236,099	No	4	S	Direct
Common Stock	Acquisiton	2024-05-23	10,752	$7.79	246,851	No	4	M	Direct
Common Stock	Acquisiton	2024-05-23	2,084	$7.79	248,935	No	4	M	Direct

Equity Swap Involved	Form Type	Code	Nature of Ownership
No	4	M	Direct
No	4	M	Direct
No	4	S	Direct
No	4	M	Direct
No	4	M	Direct

Reported Derivative Transactions

Sec. Name	Sec. Type	Acquisiton - Disposition	Date	Amount	Price	Amount - 2	Price - 2
Common Stock	Employee Stock Option (Right to Buy)	Disposition	2024-05-22	21,859	$7.79	21,859	$7.79
Common Stock	Employee Stock Option (Right to Buy)	Disposition	2024-05-22	5,208	$7.79	5,208	$7.79
Common Stock	Employee Stock Option (Right to Buy)	Disposition	2024-05-23	10,752	$7.79	10,752	$7.79
Common Stock	Employee Stock Option (Right to Buy)	Disposition	2024-05-23	2,084	$7.79	2,084	$7.79

Remaning Holdings	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
10,752	2030-05-20	No	4	M	Direct
2,084	2030-05-20	No	4	M	Direct
0	2030-05-20	No	4	M	Direct
0	2030-05-20	No	4	M	Direct

Reported Non-Derivative Holdings

Sec. Name	Remaning Holdings	Nature of Ownership	Explanation
Common Stock	96,208	Indirect	The Robert and Iran Mao Rev Trust DTD 04-06-2006

Footnotes

This figure is the weighted average sales price of multiple trades ranging from $13.81 to $13.95 per share. The reporting person undertakes to provide the SEC Staff, Energy Recovery, Inc. or a shareholder of Energy Recovery, Inc. full information about the number of shares sold at each separate price upon request.
Mr. Mao is a co-trustee and exercises shared voting and investment power.
This employee stock option was granted on May 20, 2020. 25% of the underlying shares vest on the 1st anniversary of the vesting commencement date; thereafter, the remaining 75% vest 1/36th per month.