# EDGAR Filing Document

**Accession Number:** 0001421517
**File Stem:** 0001421517-26-000050
**Filing Date:** 2026-5
**Character Count:** 10460
**Document Hash:** f5dd0cfd932f688c745b9a5ff9315c20
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001421517-26-000050.hdr.sgml**: 20260528

**ACCESSION NUMBER**: 0001421517-26-000050

**CONFORMED SUBMISSION TYPE**: 8-K

**PUBLIC DOCUMENT COUNT**: 14

**CONFORMED PERIOD OF REPORT**: 20260528

**ITEM INFORMATION**: Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers: Compensatory Arrangements of Certain Officers

**ITEM INFORMATION**: Financial Statements and Exhibits

**FILED AS OF DATE**: 20260528

**DATE AS OF CHANGE**: 20260528

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Energy Recovery, Inc.
- **CENTRAL INDEX KEY:** 0001421517
- **STANDARD INDUSTRIAL CLASSIFICATION:** SPECIAL INDUSTRY MACHINERY, NEC [3559]
- **ORGANIZATION NAME:** 06 Technology
- **EIN:** 010616867
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 8-K
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-34112
- **FILM NUMBER:** 261035590

**BUSINESS ADDRESS:**
- **STREET 1:** 1717 DOOLITTLE DRIVE
- **CITY:** SAN LEANDRO
- **STATE:** CA
- **ZIP:** 94577
- **BUSINESS PHONE:** (510) 483-7370

**MAIL ADDRESS:**
- **STREET 1:** 1717 DOOLITTLE DRIVE
- **CITY:** SAN LEANDRO
- **STATE:** CA
- **ZIP:** 94577

?xml version='1.0' encoding='ASCII'? erii-20260528

**UNITED STATES**

**SECURITIES AND EXCHANGE COMMISSION**

Washington, D.C. 20549

 

**FORM 8-K**

**Current Report**

**Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934**

**Date of Report (Date of earliest event reported): May 28, 2026** 

![ERI Logo H 4c.jpg](erii-20260528_g1.jpg)

**ENERGY RECOVERY, INC.**

*(Exact Name of Registrant as Specified in its Charter)*

---

| | | |
|:---|:---|:---|
| **Delaware** | **001-34112** | **01-0616867** |
| *(State or Other Jurisdiction of Incorporation)* | *(Commission File Number)* | *(I.R.S. Employer Identification No.)* |

---

**1717 Doolittle Drive, San Leandro, California 94577**

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;*(Address of Principal Executive Offices) (Zip Code)*

**(510) 483-7370**

*(Registrant's telephone number, including area code)*

**Not applicable**

*(Former Name or Former Address, if Changed Since Last Report)*

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐&nbsp;&nbsp;&nbsp;&nbsp;Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐&nbsp;&nbsp;&nbsp;&nbsp;Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐&nbsp;&nbsp;&nbsp;&nbsp;Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐&nbsp;&nbsp;&nbsp;&nbsp;Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

---

| | | |
|:---|:---|:---|
| Title of each class | Trading Symbol(s) | Name of each exchange on which registered |
| **Common Stock, $0.001 par value** | **ERII** | **The Nasdaq Stock Market LLC** |

---

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 or Rule 12b-2 of the Securities Exchange Act of 1934.

Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

------

**Item 5.02&nbsp;&nbsp;&nbsp;&nbsp;Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers.**

**<u>Departure of President and Chief Executive Officer</u>**

On May 25, 2026, Mr. David Moon informed the Board of Directors (the "Board") of Energy Recovery, Inc. (the "Company") of his intention to accelerate his previously announced retirement and resign from all positions within the Company, including as President, Chief Executive Officer and as a member of the Board, effective on May 26, 2026. Mr. Moon's decision to resign from the Company was not related to any disagreement with the Company's management or the Board on any matter related to the Company's operations, policies or practices.

**<u>Appointment of Interim President and Chief Executive Officer</u>**

On May 26, 2026, the Board appointed Mr. Alex Buehler, age 51, to serve as the Company's Interim President and Chief Executive Officer to serve in these positions until a permanent successor is appointed by the Board. Mr. Buehler will retain his board seat during the transition but will step down from the Compensation and Audit Committees, including his role as Audit Committee Chair. Mr. Arve Hanstveit has been appointed as the new Audit Committee Chair.

Mr. Buehler brings deep familiarity with Energy Recovery and the water industry. Mr. Buehler served as Energy Recovery's CFO from 2011 to 2014 and has been a member of the Board since 2015. Mr. Buehler most recently served as CEO of Integrated Water Services from October 2022 to October 2025, as Interim CEO of LiqTech International from March 2022 to September 2022, and earlier as President and CEO of Brock Group from February 2021 to December 2021. Prior to that, Mr. Buehler held many executive level roles at various industrial and infrastructure companies. He currently serves as a Chairman of the Board for LiqTech Systems and previously served as a Board member for Viscount Systems. Mr. Buehler received a Bachelor of Science in civil engineering from the United States Military Academy at West Point and an MBA from the Wharton School at the University of Pennsylvania.

Mr. Buehler's compensation in connection with his role as Interim President and Chief Executive Officer of the Company has not yet been determined, and will be set by the Company's Compensation Committee at a later date, at which time the Company will file an amendment to this Current Report on Form 8-K to disclose the material terms.

There are no family relationships between Mr. Buehler and any of the executive officers or directors of the Company, and there are no arrangements or understandings between Mr. Buehler and any other person pursuant to which he was appointed as an officer of the Company. There are no actual or proposed related party transactions with Mr. Buehler that are reportable under Item 5.02 of Form 8-K and Item 404(a) of Regulation S-K.

On May 28, 2026, the Company issued a press release announcing Mr. Buehler's appointment. A copy of such press release is attached hereto as Exhibit 99.1 and incorporated by reference herein.

------

**Item 9.01&nbsp;&nbsp;&nbsp;&nbsp;Financial Statements and Exhibits.**

(d)&nbsp;&nbsp;&nbsp;&nbsp;Exhibits

---

| | |
|:---|:---|
| **Exhibit Number** | **Description** |
| [99.1](ex991-pressrelease2026x0528.htm) | [Press Release, issued by Energy Recovery on](ex991-pressrelease2026x0528.htm)May 28, 2026 |
| 104 | Cover Page Interactive Data File - the cover page XBRL tags are embedded within the Inline XBRL document. |

---

**Signatures**

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

---

| | | | |
|:---|:---|:---|:---|
| | | **Energy Recovery, Inc.** | **Energy Recovery, Inc.** |
| Date: | May 28, 2026 | By: | /s/ William Yeung |
|  |  |  | William Yeung |
|  |  |  | Chief Legal Officer |

---

## Exhibit 99.1

**Exhibit 99.1**

![er_logoh4c.jpg](er_logoh4c.jpg)

**Energy Recovery Announces Appointment of Alex Buehler as Interim President and Chief Executive Officer**

**SAN LEANDRO, Calif. — May. 28, 2026** — Energy Recovery (Nasdaq: ERII), a global leader in energy-efficient technology enabling affordable, reliable water and reduced emissions, today announced that current Board of Directors member Alex Buehler has been named Interim President and CEO, effective immediately, until the permanent position has been filled. <br>

For personal reasons, President and CEO David Moon has decided to accelerate the timing of his previously announced retirement. The Board thanks Mr. Moon for his contribution to the company and wishes him well in retirement. <br>

As previously announced, the Board has engaged a leading executive search firm to conduct a search for the company's next CEO and will evaluate all qualified candidates, internal and external. <br>

Mr. Buehler brings deep familiarity with Energy Recovery and the water industry. He served as Energy Recovery's CFO from 2011 to 2014 and is a current member of Energy Recovery's Board. Mr. Buehler most recently served as CEO of Integrated Water Services and earlier as Interim CEO of LiqTech International, which specializes in advanced membranes and filters composed of silicon carbide ceramics. He currently serves as Chairman of the Board for LiqTech Systems and previously served as a Board member for Viscount Systems. <br>

Mr. Buehler received a Bachelor of Science in civil engineering from the United States Military Academy at West Point and an MBA from the Wharton School at the University of Pennsylvania. <br>

Mr. Buehler will retain his Board seat but step down from his positions on the Compensation and Audit Committees, including his role as Audit Chair. Director Arve Hanstveit has been appointed as Audit Chair.

**About Energy Recovery**

Energy Recovery (Nasdaq: ERII) designs and manufactures world-class energy-saving technology for critical infrastructure that communities rely on every day, driving a more resilient and sustainable future. Grounded in more than 30 years of leadership in the desalination industry, today we use our proprietary pressure exchanger technology to help customers in multiple industries improve their operations and lower their emissions. Headquartered in the San Francisco Bay Area, we operate manufacturing and R&D facilities throughout California, with sales and on-site technical support available globally.<br>

**Investor Relations**

ir@energyrecovery.com

**Press Inquiries**

pr@energyrecovery.com

<br>