Amended Statement of Beneficial Ownership (3/a)

FORM 3	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES	OMB APPROVAL OMB Number: 3235-0104 Estimated average burden hours per response... 0.5
	Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940

1. Name and Address of Reporting Person ^*

Ghasripoor Farshad

2. Date of Event Requiring Statement (MM/DD/YYYY) 11/16/2017

3. Issuer Name and Ticker or Trading Symbol

Energy Recovery, Inc. [ERII]

(Last) (First) (Middle)

C/O ENERGY RECOVERY, INC., 1717 DOOLITTLE DRIVE

4. Relationship of Reporting Person(s) to Issuer (Check all applicable)

_____ Director _____ 10% Owner
___ X ___ Officer (give title below) _____ Other (specify below)
Chief Technology Officer /

(Street)

SAN LEANDRO, CA 94577

(City) (State) (Zip)

5. If Amendment, Date Original Filed (MM/DD/YYYY)

11/16/2017

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 Beneficially Owned
1.Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)
Common Stock ⁽¹⁾	9231	D
Common Stock ⁽²⁾	11040 ⁽³⁾	D
Common Stock	4095	D
Common Stock ⁽⁴⁾	5230	D

*Table II - Derivative Securities Beneficially Owned ( e.g.* , puts, calls, warrants, options, convertible securities)**
1. Title of Derivate Security (Instr. 4)	2. Date Exercisable and Expiration Date (MM/DD/YYYY)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
1. Title of Derivate Security (Instr. 4)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	4. Conversion or Exercise Price of Derivative Security		6. Nature of Indirect Beneficial Ownership (Instr. 5)
Employee Stock Option (Right to Buy)	⁽⁵⁾	3/14/2023	Common Stock	5388.0	$3.92	D
Employee Stock Option (Right to Buy)	⁽⁶⁾	3/12/2024	Common Stock	31667.0	$6.0	D
Employee Stock Option (Right to Buy)	⁽⁷⁾	3/10/2025	Common Stock	39720.0	$2.75	D
Employee Stock Option (Right to Buy)	⁽⁸⁾	3/8/2026	Common Stock	26247.0	$8.52	D
Employee Stock Option (Right to Buy)	⁽⁹⁾	2/2/2027	Common Stock	17891.0	$10.19	D

Explanation of Responses:
(1)	This restricted stock unit award was granted March 8, 2016. 25% of the shares fully vest on the 1st anniversary of the vesting start date; thereafter, the remaining 75%, vest 1/36th per month.
(2)	This restricted stock unit award was granted February 2, 2017 and vests 25% on each of the first four anniversaries of the grant date.
(3)	Corrected number of shares. Shares incorrectly reported on original Form 3.
(4)	Securities held in a joint account with spouse.
(5)	This employee stock option was granted on March 14, 2013. 25% of the shares fully vest on the 1st anniversary of the vesting start date; thereafter, the remaining 75%, vest 1/36th per month.
(6)	This employee stock option was granted on March 12, 2014. 25% of the shares fully vest on the 1st anniversary of the vesting start date; thereafter, the remaining 75%, vest 1/36th per month.
(7)	This employee stock option was granted on March 10, 2015. 25% of the shares fully vest on the 1st anniversary of the vesting start date; thereafter, the remaining 75%, vest 1/36th per month.
(8)	This employee stock option was granted on March 8, 2016. 25% of the shares fully vest on the 1st anniversary of the vesting start date; thereafter, the remaining 75%, vest 1/36th per month.
(9)	This employee stock option was granted on February 2, 2017. 25% of the shares fully vest on the 1st anniversary of the vesting start date; thereafter, the remaining 75%, vest 1/36th per month.

Remarks:
Exhibit 24; Power of Attorney

Reporting Owners
Reporting Owner Name / Address	Relationships
Reporting Owner Name / Address	Director	10% Owner	Officer	Other
Ghasripoor Farshad C/O ENERGY RECOVERY, INC. 1717 DOOLITTLE DRIVE SAN LEANDRO, CA 94577			Chief Technology Officer

Signatures
/s/ Derek Ching, Attorney-in-Fact for Farshad Ghasripoor		11/30/2017
^** 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 5(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).
Note:	File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB control number.