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Who

Tracy Liu

Director

Company insider

Files Form 4 as: Director, ACM Research.

Every Form 4 they filed

In numbers

Trades disclosed
57
Buys
0
Sells
11
Bought
$0
Sold
$8.1M
Companies
1
Companies where not an officer
1
First trade
28 Jun 2018
Last trade
12 Aug 2026
Last filed
26 Aug 2026

Companies traded

Everywhere else they filed: board seats, 10% stakes, other companies
ACMR ACM ResearchDirector · Semiconductor Equipment · last 12 Aug 20260 buys · 11 sells

Activity over time

1 Nov 2024 – 1 Oct 2026
20Nov 24May 25Nov 25Apr 26Oct 26

Buys above the line, sells below, each month.

Every trade

TradedCompanyWhatAmount
12 Aug 2026filed 26 Aug 2026ACMR ACM Researchoption or derivative · Semiconductor EquipmentSEC FORM 4 Code A—6,400 at $0.00filing
12 Aug 2026filed 26 Aug 2026ACMR ACM Researchoption or derivative · Semiconductor EquipmentSEC FORM 4 Code A—728 at $0.00filing
12 Aug 2026filed 26 Aug 2026ACMR ACM Researchoption or derivative · Semiconductor EquipmentSEC FORM 4 Code A—6,400 at $0.00filing
12 Aug 2026filed 26 Aug 2026ACMR ACM Researchoption or derivative · Semiconductor EquipmentSEC FORM 4 Code A—728 at $0.00filing
11 Mar 2026filed 12 Mar 2026ACMR ACM Researchoption or derivative · Semiconductor EquipmentSEC FORM 4 Code M—15,000 at $0.00filing
11 Mar 2026filed 12 Mar 2026ACMR ACM ResearchSemiconductor EquipmentSEC FORM 4 Code M$15K15,000 at $1.00filing
11 Mar 2026filed 12 Mar 2026ACMR ACM ResearchSemiconductor EquipmentSEC FORM 4 Sold$556K11,623 at $47.81filing
11 Mar 2026filed 12 Mar 2026ACMR ACM ResearchSemiconductor EquipmentSEC FORM 4 Sold$163K3,377 at $48.25filing
11 Mar 2026filed 12 Mar 2026ACMR ACM Researchoption or derivative · Semiconductor EquipmentSEC FORM 4 Code M—15,000 at $0.00filing
11 Mar 2026filed 12 Mar 2026ACMR ACM ResearchSemiconductor EquipmentSEC FORM 4 Code M$15K15,000 at $1.00filing
11 Mar 2026filed 12 Mar 2026ACMR ACM ResearchSemiconductor EquipmentSEC FORM 4 Sold$556K11,623 at $47.81filing
11 Mar 2026filed 12 Mar 2026ACMR ACM ResearchSemiconductor EquipmentSEC FORM 4 Sold$163K3,377 at $48.25filing
10 Mar 2026filed 12 Mar 2026ACMR ACM ResearchSemiconductor EquipmentSEC FORM 4 Code M$45K45,000 at $1.00filing
10 Mar 2026filed 12 Mar 2026ACMR ACM ResearchSemiconductor EquipmentSEC FORM 4 Sold$1.5M32,216 at $47.06filing
10 Mar 2026filed 12 Mar 2026ACMR ACM ResearchSemiconductor EquipmentSEC FORM 4 Sold$616K12,784 at $48.19filing
10 Mar 2026filed 12 Mar 2026ACMR ACM Researchoption or derivative · Semiconductor EquipmentSEC FORM 4 Code M—45,000 at $0.00filing
10 Mar 2026filed 12 Mar 2026ACMR ACM Researchoption or derivative · Semiconductor EquipmentSEC FORM 4 Code M—45,000 at $0.00filing
10 Mar 2026filed 12 Mar 2026ACMR ACM ResearchSemiconductor EquipmentSEC FORM 4 Code M$45K45,000 at $1.00filing
10 Mar 2026filed 12 Mar 2026ACMR ACM ResearchSemiconductor EquipmentSEC FORM 4 Sold$1.5M32,216 at $47.06filing
10 Mar 2026filed 12 Mar 2026ACMR ACM ResearchSemiconductor EquipmentSEC FORM 4 Sold$616K12,784 at $48.19filing

Sectors

Technology11

Buys in green, sells in red, by the company’s sector.

Related people

David H. WangDirector and Officer and 10% owner · Director and Officer and 10% owner at ACM Research, filing Form 4 there in the last year
Haiping DunDirector · Director at ACM Research, filing Form 4 there in the last year
Charles C. PappisDirector · Director at ACM Research, filing Form 4 there in the last year
Mark McKechnieOfficer · Officer at ACM Research, filing Form 4 there in the last year
Sotheara CheavOfficer · Insider at ACM Research, filing Form 4 there in the last year