---
schema_version: "secwatch.filing_event.v1"
accession: "0001654954-23-000931"
form_type: "8-K"
ticker: "AEHR"
cik: "0001040470"
company_name: "AEHR TEST SYSTEMS"
filed_at: "2023-01-27T23:59:59+00:00"
generated_at: "2026-06-20T07:01:07.406376+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.2
calibrated_materiality_score: 0.2
confidence: "high"
source: SEC EDGAR
---

# Aehr Test Systems board member Mario Rosati retires after 45 years; Rhea Posedel appointed to governance committee

## Summary
- Mario Rosati retired from the board effective January 24, 2023, voluntarily and without disagreement.
- Rhea Posedel appointed to Corporate Governance and Nominating Committee, replacing Mr. Rosati.
- Rosati had served on the board since the company's founding in 1977, a tenure of 45 years.
- Aehr Test Systems now has six board members following the retirement.

## SEC filing metadata
- accession: 0001654954-23-000931
- form_type: 8-K
- ticker: AEHR
- cik: 0001040470
- company_name: AEHR TEST SYSTEMS
- filed_at: 2023-01-27T23:59:59+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.2
- calibrated_materiality_score: 0.2
- confidence: high
- sec_items: 5.02, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1040470/000165495423000931/0001654954-23-000931-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1040470/000165495423000931/aehr_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001654954-23-000931
- JSON: https://secwatch.observer/filing/0001654954-23-000931.json
- Plain text: https://secwatch.observer/filing/0001654954-23-000931.txt

## Key facts
- Executive change
  Mario Rosati retired as Director at AEHR TEST SYSTEMS.
  - Action: retired
  - Role: Director
  source text: On January 24, 2023, Mario Rosati retired as a director of Aehr Test Systems (the "Company").
  evidence_url: https://www.sec.gov/Archives/edgar/data/1040470/000165495423000931/0001654954-23-000931-index.htm

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