---
schema_version: "secwatch.filing_event.v1"
accession: "0001421517-24-000080"
form_type: "8-K"
ticker: "ERII"
cik: "0001421517"
company_name: "Energy Recovery, Inc."
filed_at: "2024-04-22T23:59:59+00:00"
generated_at: "2026-06-03T13:40:00.600669+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.25
calibrated_materiality_score: 0.25
confidence: "high"
source: SEC EDGAR
---

# Energy Recovery board member Robert Yu Lang Mao to step down at 2024 annual meeting

## Summary
- Mao's resignation accepted by Board effective end of his term at 2024 Annual Meeting.
- Mao decided not to seek re-election; no disagreement with Company cited.
- No replacement named; term ends at upcoming shareholder meeting.

## SEC filing metadata
- accession: 0001421517-24-000080
- form_type: 8-K
- ticker: ERII
- cik: 0001421517
- company_name: Energy Recovery, Inc.
- filed_at: 2024-04-22T23:59:59+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.25
- calibrated_materiality_score: 0.25
- confidence: high
- sec_items: 5.02
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1421517/000142151724000080/0001421517-24-000080-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1421517/000142151724000080/erii-20240422.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001421517-24-000080
- JSON: https://secwatch.observer/filing/0001421517-24-000080.json
- Plain text: https://secwatch.observer/filing/0001421517-24-000080.txt

## Key facts
- Executive change
  Robert Yu Lang Mao resigned as Board member at Energy Recovery, Inc..
  - Action: resigned
  - Role: Board member
  source text: On April 22, 2024, the Board of Directors (the “Board”) of Energy Recovery, Inc. (the “Company”) accepted the previously tendered resignation of Board member, Mr. Robert Yu Lang Mao, effective upon the completion of his term, which ends at the Company’s 2024 Annual Meeting of Shareholders.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1421517/000142151724000080/0001421517-24-000080-index.htm

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.