Arve Hanstveit - Jun 5, 2025 Form 4 Insider Report for Energy Recovery, Inc. (ERII)

Role: Director
Signature: /s/ William Yeung Attorney-in-fact for Arve Hanstveit
Stock symbol: ERII
Transactions as of: Jun 5, 2025
Transactions value $: $0
Form type: 4
Date filed: 6/6/2025, 04:48 PM
Previous filing: Mar 13, 2025
Next filing: Jun 13, 2025
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Hanstveit Arve	Director	C/O ENERGY RECOVERY, INC., 1717 DOOLITTLE DRIVE, SAN LEANDRO	/s/ William Yeung Attorney-in-fact for Arve Hanstveit	2025-06-06	0001430122

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	ERII	Common Stock	Award	$0	+12K	+1.74%	$0.00	705K	Jun 5, 2025	Direct	F1
holding	ERII	Common Stock						60K	Jun 5, 2025	Natasha Hanstveit Irrevocable Trust	F2
holding	ERII	Common Stock						60K	Jun 5, 2025	Sophie Hanstveit Irrevocable Trust	F2

Showing 1 to 3 of 3 entries

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

Explanation of Responses:

Id	Content
F1	The restricted stock unit will fully vest on 2026 Annual Meeting date, anticipated to be on or about June 4, 2026.
F2	Mr. Hanstveit is sole trustee and exercises sole voting and investment power.

Remarks:

Exhibit 24