SEC Form 4
FORM 4 UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP


Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940
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 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
  
 Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.
1. Name and Address of Reporting Person*
Mao Robert Yu Lang
(Last) (First) (Middle)
C/O ENERGY RECOVERY, INC.
1717 DOOLITTLE DRIVE
(Street)
SAN LEANDRO CA 94577
(City) (State) (Zip)
2. Issuer Name and Ticker or Trading Symbol
Energy Recovery, Inc. [ ERII ] 		5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
X Director 10% Owner
Officer (give title below) Other (specify below)
3. Date of Earliest Transaction (Month/Day/Year)
03/04/2024
4. If Amendment, Date of Original Filed (Month/Day/Year)
 6. Individual or Joint/Group Filing (Check Applicable Line)
X Form filed by One Reporting Person
Form filed by More than One Reporting Person
Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4)
Code V Amount (A) or (D) Price
Common Stock 03/04/2024 M 20,509 A $2.92 196,621 D
Common Stock 03/04/2024 S 20,509 D $15.7432(1) 176,112 D
Common Stock 03/04/2024 M 15,327 A $8.6 191,439 D
Common Stock 03/04/2024 S 15,270 D $15.7412(2) 176,169 D
Common Stock 03/04/2024 M 16,726 A $7.71 192,895 D
Common Stock 03/04/2024 M 15,879 A $8.49 208,774 D
Common Stock 03/04/2024 M 21,303 A $9.98 230,077 D
Common Stock 96,208 I The Robert and Iran Mao Rev Trust DTD 04-06-2006
Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year) 3A. Deemed Execution Date, if any (Month/Day/Year) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 6. Date Exercisable and Expiration Date (Month/Day/Year) 7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4)
Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares
Stock Option (Right to Buy) $2.92 03/04/2024 M 20,509 (3) 06/23/2025 Common Stock 20,509 $0 0 D
Stock Option (Right to Buy) $7.71 03/04/2024 M 16,726 (4) 06/22/2027 Common Stock 16,726 $0 0 D
Stock Option (Right to Buy) $8.49 03/04/2024 M 15,879 (5) 06/14/2028 Common Stock 15,879 $0 0 D
Stock Option (Right to Buy) $9.98 03/04/2024 M 21,303 (6) 06/13/2029 Common Stock 21,303 $0 0 D
Stock Option (Right to Buy) $8.6 03/04/2024 M 15,327 (7) 06/23/2026 Common Stock 15,327 $0 0 D
Explanation of Responses:
1. 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.
2. 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.
3. The stock option (Grant #753) was granted on June 23, 2015 and is fully vested.
4. The stock option (Grant #916) was granted on June 22, 2017 and is fully vested.
5. The stock option (Grant #1016) was granted on June 14, 2018 and is fully vested.
6. The stock option (Grant #1132) was granted on June 13, 2019 and is fully vested.
7. The stock option (Grant #835) was granted on June 23, 2016 and is fully vested.
Remarks:
Exhibit 24
/s/ William Yeung, Attorney-in-Fact for Robert Yu Lang Mao 03/06/2024
** Signature of Reporting Person Date

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).

** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).

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