Alexander J. Buehler - 15 Jun 2026 Form 4 Insider Report for Energy Recovery, Inc. (ERII)

Reporting relationship: Interim President and CEO, Director
Issuer ticker: ERII
Reported as of: 15 Jun 2026
Net transaction value: -$129,779
SEC form: 4
Accepted by SEC: 17 Jun 2026, 16:08:21 UTC
Prior SEC filing: 06 Jun 2025
Source filing: View source filing
Reporting owner signature: /s/ William Yeung Attorney-in-fact for Alexander J. Buehler

Key filing fact

Alexander J. Buehler filed Form 4 for Energy Recovery, Inc. (ERII) on 17 Jun 2026.

Key facts

This page summarizes Alexander J. Buehler's Form 4 filing for Energy Recovery, Inc. (ERII).
3 reported transactions and 1 derivative row are listed below.
Accepted by SEC: 17 Jun 2026, 16:08.

Change

Previous filing in this sequence was filed on 06 Jun 2025.
Current net transaction value: -$129,779.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001397838 Primary reporting owner

BUEHLER ALEXANDER J

Relationship: Interim President and CEO, Director
Address: C/O ENERGY RECOVERY, INC., 1717 DOOLITTLE DRIVE, SAN LEANDRO
Signature: /s/ William Yeung Attorney-in-fact for Alexander J. Buehler
Signature date: 17 Jun 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

ERII transaction

Common Stock

Options Exercise

Transaction value
Shares: +15,327
Change %: +23%
Price: $8.60^*
Shares after: 81,655
Date: 15 Jun 2026
Ownership: Direct

ERII transaction

Common Stock

Sale

Transaction value: $129,779
Shares: -14,900
Change %: -18%
Price: $8.71
Shares after: 66,755
Date: 15 Jun 2026
Ownership: Direct
Footnotes: F1

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

ERII transaction Derivative

Stock Option (Right to Buy)

Options Exercise

Transaction value
Shares: -15,327
Change %: -100%
Price: $8.60^*
Shares after: 0
Date: 15 Jun 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 15,327
Exercise price: $8.60
Footnotes: F2

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 2 footnotes

Footnote F1

This amount represents the weighted average sales price of multiple trades ranging from $8.60 to $8.86 per share. The reporting person undertakes to provide the SEC Staff, Energy Recovery, Inc. or a shareholder of Energy Recovery, Inc. full information about the number of shares sold at each separate price upon request.

Footnote F2

The shares became fully vested and exercisable on June 23, 2017 and expire on June 23, 2026.

SEC remarks

Exhibit 24