---
schema_version: "secwatch.filing_event.v1"
accession: "0001654954-23-007424"
form_type: "8-K"
ticker: "AEHR"
cik: "0001040470"
company_name: "AEHR TEST SYSTEMS"
filed_at: "2023-05-31T23:59:59+00:00"
generated_at: "2026-06-14T10:09:55.467043+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.55
calibrated_materiality_score: 0.55
confidence: "high"
source: SEC EDGAR
---

# Aehr Test Systems appoints Chris Siu as CFO effective June 1, 2023; Ken Spink retiring

## Summary
- Chris Siu becomes EVP of Finance, CFO, and Secretary, effective June 1, 2023.
- Annual base salary of $336,000; target cash bonus of 75% of base; initial equity grant of $600,000 vesting over four years.
- Siu brings 27+ years of semiconductor and public accounting experience, previously SVP Finance at Ultra Clean Technologies.
- Ken Spink will remain through August 31, 2023, to assist transition after 15 years with the company.
- New CFO also receives change-of-control severance: 12 months base pay, prorated bonuses, full equity vesting.

## SEC filing metadata
- accession: 0001654954-23-007424
- form_type: 8-K
- ticker: AEHR
- cik: 0001040470
- company_name: AEHR TEST SYSTEMS
- filed_at: 2023-05-31T23:59:59+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.55
- calibrated_materiality_score: 0.55
- confidence: high
- sec_items: 5.02, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1040470/000165495423007424/0001654954-23-007424-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1040470/000165495423007424/aehr_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001654954-23-007424
- JSON: https://secwatch.observer/filing/0001654954-23-007424.json
- Plain text: https://secwatch.observer/filing/0001654954-23-007424.txt

## Key facts
- Executive change
  Kenneth B. Spink departed as Chief Financial Officer at AEHR TEST SYSTEMS.
  - Action: retiring
  - Role: Chief Financial Officer
  source text: Mr. Siu will replace Kenneth B. Spink who will remain through his retirement on August 31, 2023 to assist in the transition.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1040470/000165495423007424/0001654954-23-007424-index.htm
- Executive change
  Chris Siu was appointed as Executive Vice President of Finance, Chief Financial Officer and Secretary at AEHR TEST SYSTEMS.
  - Action: appointed
  - Role: Executive Vice President of Finance, Chief Financial Officer and Secretary
  source text: On May 8, 2023, the Board of Directors (the "Board") of Aehr Test Systems (the "Company") appointed Chris Siu as the Company's Executive Vice President of Finance, Chief Financial Officer and Secretary, effective upon his hire date of June 1, 2023.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1040470/000165495423007424/0001654954-23-007424-index.htm

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