Who
Charles C. Pappis
Director
Company insider
Files Form 4 as: Director, ACM Research; Group VP, GM AGS, Applied Materials.
In numbers
- Trades disclosed
- 42
- Buys
- 0
- Sells
- 9
- Bought
- $0
- Sold
- $3.1M
- Companies
- 2
- Companies where not an officer
- 1
- First trade
- 19 Jan 2010
- Last trade
- 12 Aug 2026
- Last filed
- 26 Aug 2026
Companies traded
Activity over time
1 Nov 2024 – 1 Oct 2026
Buys above the line, sells below, each month.
Every trade
| Traded | Company | What | Amount | |
|---|---|---|---|---|
| 12 Aug 2026filed 26 Aug 2026 | ACMR ACM Researchoption or derivative · Semiconductor Equipment | SEC FORM 4 Code A | —6,400 at $0.00 | filing |
| 12 Aug 2026filed 26 Aug 2026 | ACMR ACM Researchoption or derivative · Semiconductor Equipment | SEC FORM 4 Code A | —728 at $0.00 | filing |
| 12 Aug 2026filed 26 Aug 2026 | ACMR ACM Researchoption or derivative · Semiconductor Equipment | SEC FORM 4 Code A | —6,400 at $0.00 | filing |
| 12 Aug 2026filed 26 Aug 2026 | ACMR ACM Researchoption or derivative · Semiconductor Equipment | SEC FORM 4 Code A | —728 at $0.00 | filing |
| 17 Apr 2026filed 21 Apr 2026 | ACMR ACM ResearchSemiconductor Equipment | SEC FORM 4 Code M | $146K5,000 at $29.18 | filing |
| 17 Apr 2026filed 21 Apr 2026 | ACMR ACM ResearchSemiconductor Equipment | SEC FORM 4 Sold | $260K5,000 at $52.00 | filing |
| 17 Apr 2026filed 21 Apr 2026 | ACMR ACM Researchoption or derivative · Semiconductor Equipment | SEC FORM 4 Code M | —5,000 at $0.00 | filing |
| 17 Apr 2026filed 21 Apr 2026 | ACMR ACM Researchoption or derivative · Semiconductor Equipment | SEC FORM 4 Code M | —5,000 at $0.00 | filing |
| 17 Apr 2026filed 21 Apr 2026 | ACMR ACM ResearchSemiconductor Equipment | SEC FORM 4 Code M | $146K5,000 at $29.18 | filing |
| 17 Apr 2026filed 21 Apr 2026 | ACMR ACM ResearchSemiconductor Equipment | SEC FORM 4 Sold | $260K5,000 at $52.00 | filing |
| 5 Mar 2026filed 9 Mar 2026 | ACMR ACM ResearchSemiconductor Equipment | SEC FORM 4 Code M | $146K5,000 at $29.18 | filing |
| 5 Mar 2026filed 9 Mar 2026 | ACMR ACM ResearchSemiconductor Equipment | SEC FORM 4 Sold | $250K5,000 at $50.09 | filing |
| 5 Mar 2026filed 9 Mar 2026 | ACMR ACM Researchoption or derivative · Semiconductor Equipment | SEC FORM 4 Code M | —5,000 at $0.00 | filing |
| 5 Mar 2026filed 9 Mar 2026 | ACMR ACM Researchoption or derivative · Semiconductor Equipment | SEC FORM 4 Code M | —5,000 at $0.00 | filing |
| 5 Mar 2026filed 9 Mar 2026 | ACMR ACM ResearchSemiconductor Equipment | SEC FORM 4 Code M | $146K5,000 at $29.18 | filing |
| 5 Mar 2026filed 9 Mar 2026 | ACMR ACM ResearchSemiconductor Equipment | SEC FORM 4 Sold | $250K5,000 at $50.09 | filing |
| 12 Aug 2025filed 14 Aug 2025 | ACMR ACM Researchoption or derivative · Semiconductor Equipment | SEC FORM 4 Code A | —20,000 at $0.00 | filing |
| 15 Mar 2025filed 21 May 2025 | ACMR ACM Researchoption or derivative · Semiconductor Equipment | SEC FORM 4 Code A | —10,000 at $0.00 | filing |
| 1 Jul 2013filed 3 Jul 2013 | AMAT Applied Materialsoption or derivative · Semiconductor Equipment | SEC FORM 4 Code M | —21,667 at $0.00 | filing |
| 1 Jul 2013filed 3 Jul 2013 | AMAT Applied MaterialsSemiconductor Equipment | SEC FORM 4 Code M | $186K21,667 at $8.58 | filing |
News
Head-To-Head Analysis: Himax Technologies (NASDAQ:HIMX) & ACM Research (NASDAQ:ACMR)ACMR · dailypolitical.com · 11 Oct 2026ACM Research (NASDAQ:ACMR) versus Himax Technologies (NASDAQ:HIMX) Critical ContrastACMR · tickerreport.com · 11 Oct 2026
0 headlines in the last 90 days name Charles C. Pappis; 2 articles from the last 14 days about the 1 company they traded most, at most three about any one of them.