---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-25-338394"
form_type: "8-K"
ticker: "ALDX"
cik: "0001341235"
company_name: "Aldeyra Therapeutics, Inc."
filed_at: "2025-12-31T23:59:59+00:00"
generated_at: "2026-05-16T11:53:21.588770+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.4
calibrated_materiality_score: 0.4
confidence: "high"
source: SEC EDGAR
---

# Aldeyra CDO Stephen Machatha resigns; transition through March 2026 with $176K severance

## Summary
- Chief Development Officer Stephen G. Machatha voluntarily resigns effective on/before March 31, 2026.
- Machatha to remain employed through transition period to ensure smooth handoff.
- Severance includes $88K lump sum (50% of 2025 bonus at 110% of target) plus another $88K on release.
- No dispute with management cited as reason for departure.

## SEC filing metadata
- accession: 0001193125-25-338394
- form_type: 8-K
- ticker: ALDX
- cik: 0001341235
- company_name: Aldeyra Therapeutics, Inc.
- filed_at: 2025-12-31T23:59:59+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.4
- calibrated_materiality_score: 0.4
- confidence: high
- sec_items: 5.02
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1341235/000119312525338394/0001193125-25-338394-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1341235/000119312525338394/d69806d8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-25-338394
- JSON: https://secwatch.observer/filing/0001193125-25-338394.json
- Plain text: https://secwatch.observer/filing/0001193125-25-338394.txt

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