Summary
Updated Aug 31, 2026
Jonathan Klamkin is Chief Executive Officer, Director of Aeluma, Inc. (ALMU). 7 SEC Form 4 filings on record going back to 2025, most recently on 5 August 2026. Most recent open-market trade: sold $266K of ALMU on 5 August 2026. Lifetime open-market sales: $5.75M.
Recent Transactions
20Every recent SEC Form 4 transaction Jonathan Klamkin has reported, most recent first.
Trading Pattern
InsiderAlpha's records for Jonathan Klamkin go back to 2025: 7 primary Form 4 filings, an average of 3.5 per year. 31 recorded transactions carry a Rule 10b5-1 flag, meaning they were pre-scheduled under a written trading plan rather than discretionary.
Other Insiders Active in the Same Stocks
Insiders who reported open-market trades in the last 12 months at the companies Jonathan Klamkin 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.
- Mark N. Tompkins - $18.00M of ALMU open-market activity in the last 12 months
- Steven Denbaars - $1.27M of ALMU open-market activity in the last 12 months
- Lee McCarthy - $4K of ALMU 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 Jonathan Klamkin?
Jonathan Klamkin is a corporate insider, tracked as Chief Executive Officer, Director of Aeluma, Inc. (ALMU). InsiderAlpha holds 7 primary Form 4 filings for them, the earliest from 2025, updated as new SEC EDGAR filings are processed.
How many SEC Form 4 filings has Jonathan Klamkin submitted recently?
3 primary Form 4 filings in the last 90 days, covering 1 company.
Has Jonathan Klamkin been buying or selling stock?
Recorded transactions: 0 open-market purchases and 16 open-market sales ($5.75M) across all tracked filings.
Where can I see all of Jonathan Klamkin'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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