---
schema_version: "secwatch.filing_event.v1"
accession: "0001171843-23-005839"
form_type: "8-K"
ticker: "PMDI"
cik: "0000806517"
company_name: "PSYCHEMEDICS CORP"
filed_at: "2023-09-22T23:59:59+00:00"
generated_at: "2026-06-10T09:58:28.382906+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.15
calibrated_materiality_score: 0.15
confidence: "high"
source: SEC EDGAR
---

# Psychomedics Assistant Controller Michael Weisenhoff resigns effective Sept 29, 2023

## Summary
- Michael Weisenhoff, Assistant Controller, resigned on Sept 20, 2023, effective Sept 29, 2023.
- Resignation is to take a position with another company.
- Company states the departure will not have a material impact on operations.
- No successor named; transition expected to be handled internally.

## SEC filing metadata
- accession: 0001171843-23-005839
- form_type: 8-K
- ticker: PMDI
- cik: 0000806517
- company_name: PSYCHEMEDICS CORP
- filed_at: 2023-09-22T23:59:59+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.15
- calibrated_materiality_score: 0.15
- confidence: high
- sec_items: 5.02
- EDGAR index: https://www.sec.gov/Archives/edgar/data/806517/000117184323005839/0001171843-23-005839-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/806517/000117184323005839/f8k_092223.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001171843-23-005839
- JSON: https://secwatch.observer/filing/0001171843-23-005839.json
- Plain text: https://secwatch.observer/filing/0001171843-23-005839.txt

## Key facts
- Executive change
  Michael Weisenhoff resigned as Assistant Controller at PSYCHEMEDICS CORP.
  - Action: resigned
  - Role: Assistant Controller
  source text: On September 20, 2023, Michael Weisenhoff, Assistant Controller, resigned from such position effective September 29, 2023, to take a position with another company.
  evidence_url: https://www.sec.gov/Archives/edgar/data/806517/000117184323005839/0001171843-23-005839-index.htm

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