Summary
Latest filing:
Charles C. Pappis is Director of ACM Research, Inc. (ACMR). 4 SEC Form 4 filings on record going back to 2025, most recently on 27 August 2026. Most recent open-market trade: sold $260K of ACMR on 21 April 2026. Lifetime open-market sales: $510K.
Recent Transactions
4Every recent SEC Form 4 transaction Charles C. Pappis 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 Charles C. Pappis 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.
- David H. Wang - $28.98M of ACMR open-market activity in the last 12 months
- Mark McKechnie - $8.76M of ACMR open-market activity in the last 12 months
- Fuping Chen - $3.98M of ACMR open-market activity in the last 12 months
- Tracy Liu - $2.85M of ACMR open-market activity in the last 12 months
- Lisa Feng - $2.44M of ACMR open-market activity in the last 12 months
- Sotheara Cheav - $1.94M of ACMR 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 Charles C. Pappis?
Charles C. Pappis is a corporate insider, tracked as Director of ACM Research, Inc. (ACMR). InsiderAlpha holds 4 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 Charles C. Pappis submitted recently?
1 primary Form 4 filing in the last 90 days, covering 1 company.
Has Charles C. Pappis been buying or selling stock?
Recorded transactions: 0 open-market purchases and 2 open-market sales ($510K) across all tracked filings.
Where can I see all of Charles C. Pappis'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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