Summary
Updated Aug 30, 2026
Stephen Machatha is Chief Development Officer of Aldeyra Therapeutics, Inc. (ALDX). 1 SEC Form 4 filing on record, dated 11 August 2025. Most recent open-market trade: sold $114K of ALDX on 11 August 2025. Lifetime open-market sales: $114K.
Recent Transactions
1Every recent SEC Form 4 transaction Stephen Machatha has reported, most recent first.
Other Insiders Active in the Same Stocks
Insiders who reported open-market trades in the last 12 months at the companies Stephen Machatha files at. Multiple unrelated insiders buying the same stock within a short window, cluster buying, has historically been one of the strongest Form 4 signals.
- Todd C. Brady - $418K of ALDX open-market activity in the last 12 months
- Richard Douglas - $98K of ALDX open-market activity in the last 12 months
- Michael Alfieri - $7K of ALDX open-market activity in the last 12 months
More Notable Insiders
Other corporate insiders with significant SEC Form 4 track records on InsiderAlpha:
Frequently Asked Questions
Who is Stephen Machatha?
Stephen Machatha is a corporate insider, tracked as Chief Development Officer of Aldeyra Therapeutics, Inc. (ALDX). InsiderAlpha holds 1 primary Form 4 filing for them, the earliest from 2025, updated as new SEC EDGAR filings are processed.
When did Stephen Machatha last file a Form 4?
The only primary Form 4 on record is dated 11 August 2025.
Has Stephen Machatha been buying or selling stock?
Recorded transactions: 0 open-market purchases and 1 open-market sale ($114K) across all tracked filings.
Where can I see all of Stephen Machatha's SEC filings?
All Form 4 filings, transaction values, and 10b5-1 plan flags are listed on this page and updated in real time as new SEC EDGAR filings are processed.
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