Hanstveit Arve 4

What Happened
Arve Hanstveit, a director of Energy Recovery, Inc. (ERII), received a grant of 18,094 restricted stock units (RSUs) on 2026-06-04. The RSUs were valued at $8.29 per share, for a total grant value of $149,999. This filing reports an award/acquisition (code A) rather than an open-market purchase or sale.

Key Details

• Transaction date: 2026-06-04; Form 4 filed 2026-06-05 (timely filing).
• Grant: 18,094 RSUs at $8.29 per share; total reported value $149,999.
• Shares owned after transaction: not specified in the filing.
• Footnote F1: RSUs will fully vest at the 2027 Annual Meeting, anticipated on or about June 3, 2027.
• Footnote F2: Mr. Hanstveit is sole trustee and exercises sole voting and investment power.
• Remarks: Exhibit 24 included with the filing.

Context
Restricted stock units are a form of equity compensation that convert to shares when they vest; they do not represent immediately tradable stock. The RSUs here are scheduled to vest in connection with the 2027 annual meeting, so they are a forward-looking grant rather than an immediate change in tradable holdings. The trustee note indicates Hanstveit’s control over these shares once issued.