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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	2024-03-04	20,509	$2.92	196,621	No	4	M	Direct
Common Stock	Disposition	2024-03-04	20,509	$15.74	176,112	No	4	S	Direct
Common Stock	Acquisiton	2024-03-04	15,327	$8.60	191,439	No	4	M	Direct
Common Stock	Disposition	2024-03-04	15,270	$15.74	176,169	No	4	S	Direct
Common Stock	Acquisiton	2024-03-04	16,726	$7.71	192,895	No	4	M	Direct
Common Stock	Acquisiton	2024-03-04	15,879	$8.49	208,774	No	4	M	Direct
Common Stock	Acquisiton	2024-03-04	21,303	$9.98	230,077	No	4	M	Direct

Equity Swap Involved	Form Type	Code	Nature of Ownership
No	4	M	Direct
No	4	S	Direct
No	4	M	Direct
No	4	S	Direct
No	4	M	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	Stock Option (Right to Buy)	Disposition	2024-03-04	20,509	$0.00	20,509	$2.92
Common Stock	Stock Option (Right to Buy)	Disposition	2024-03-04	16,726	$0.00	16,726	$7.71
Common Stock	Stock Option (Right to Buy)	Disposition	2024-03-04	15,879	$0.00	15,879	$8.49
Common Stock	Stock Option (Right to Buy)	Disposition	2024-03-04	21,303	$0.00	21,303	$9.98
Common Stock	Stock Option (Right to Buy)	Disposition	2024-03-04	15,327	$0.00	15,327	$8.60

Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
2025-06-23	No	4	M	Direct
2027-06-22	No	4	M	Direct
2028-06-14	No	4	M	Direct
2029-06-13	No	4	M	Direct
2026-06-23	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 $15.39 to $16.02 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.
This figure is the weighted average sales price of multiple trades ranging from $15.385 to $16.03 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.
The stock option (Grant #753) was granted on June 23, 2015 and is fully vested.
The stock option (Grant #916) was granted on June 22, 2017 and is fully vested.
The stock option (Grant #1016) was granted on June 14, 2018 and is fully vested.
The stock option (Grant #1132) was granted on June 13, 2019 and is fully vested.
The stock option (Grant #835) was granted on June 23, 2016 and is fully vested.