Energy Recovery Interim CFO Aidan Ryan Acquires 18,518 Shares at $11.61

This Form 4 filing reports that Aidan Ryan, Interim Chief Financial Officer of Energy Recovery, Inc. (ERII), acquired 18,518 shares of common stock on May 6, 2026, at a price of $11.61 per share. The transaction was an acquisition (code A) and increased Ryan's total holdings to 34,133 shares. The filing includes a Power of Attorney document dated May 18, 2026, where Ryan designates David Moon and William Yeung as attorneys-in-fact to prepare and execute SEC Forms 3, 4, and 5 on his behalf. This arrangement allows the designated attorneys to handle Section 16 reporting requirements for Ryan's transactions as an officer of the company. The filing demonstrates insider buying activity by a key executive.