---
schema_version: "secwatch.filing_event.v1"
accession: "0001171843-24-003414"
form_type: "8-K"
ticker: "PMDI"
cik: "0000806517"
company_name: "PSYCHEMEDICS CORP"
filed_at: "2024-06-12T23:59:59+00:00"
generated_at: "2026-06-01T04:56:44.593608+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.5
calibrated_materiality_score: 0.5
confidence: "high"
source: SEC EDGAR
---

# Psychemedics dismisses BDO USA as auditor, engages Whitley Penn LLP

## Summary
- Dismissed BDO USA as independent auditor on June 6, 2024; engaged Whitley Penn LLP on June 12, 2024.
- No disagreements or reportable events with BDO in the two most recent fiscal years and interim period.
- BDO's audit reports for fiscal years ended Dec 31, 2023 and 2022 were unqualified.
- Company provided BDO with a copy of the statements and received BDO's letter to SEC agreeing with the statements.

## SEC filing metadata
- accession: 0001171843-24-003414
- form_type: 8-K
- ticker: PMDI
- cik: 0000806517
- company_name: PSYCHEMEDICS CORP
- filed_at: 2024-06-12T23:59:59+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.5
- calibrated_materiality_score: 0.5
- confidence: high
- sec_items: 4.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/806517/000117184324003414/0001171843-24-003414-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/806517/000117184324003414/f8k_061224.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001171843-24-003414
- JSON: https://secwatch.observer/filing/0001171843-24-003414.json
- Plain text: https://secwatch.observer/filing/0001171843-24-003414.txt

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