Mancini Michael S. 4

What Happened
Michael S. Mancini, Chief Financial Officer of Energy Recovery, Inc. (ERII), received a grant of 45,626 restricted stock units (RSUs) on February 17, 2026. The grant is reported at $0.00 per unit (no cash paid at grant). Each RSU represents the right to receive one share of common stock at settlement.

Key Details

• Transaction date: 2026-02-17; Filing date (Form 4): 2026-02-19 (timely filing).
• Transaction type/code: Award/Grant (A). Reported price: $0.00; total reported cash value: $0.
• Grant size: 45,626 RSUs. Each RSU = one share at settlement (Footnote F2).
• Vesting: 25% of the RSUs vest on each of the first four anniversaries of the grant date (Footnote F1).
• Shares owned after transaction: not disclosed in the filing.
• Remarks/Exhibit: Exhibit 24 attached.

Context
RSU grants are a form of compensation, not an open-market purchase or sale. They generally vest over time and convert to actual shares only if vesting conditions are met; therefore this award does not represent immediate buying or selling pressure. The economic value to the insider will depend on Energy Recovery’s future stock price at settlement.