Form 3 Filing for Energy Recovery, Inc. - Ownership Change

This filing is a Form 3, which reports initial beneficial ownership of securities. Aidan Ryan, an officer of Energy Recovery, Inc. (ERII), has reported direct ownership of 15,615 shares of Common Stock. Additionally, Mr. Ryan has been granted employee stock options to acquire 14,887 shares of Common Stock at an exercise price of $16.19 per share. These options vest over a four-year schedule starting from the grant date, with 25% vesting on the first anniversary and the remainder vesting monthly over the subsequent three years. The filing also includes a Power of Attorney (Exhibit 24) designating David Moon and William Yeung as attorneys-in-fact to prepare and execute Section 16 reporting forms on behalf of Mr. Ryan. This power of attorney revokes prior authorizations and remains effective until Mr. Ryan is no longer subject to Section 16 reporting requirements or until he formally revokes it.