Skip to content Home / Companies / ACMR ACM
ACM Research, Inc. (ACMR) XNAS SPECIAL INDUSTRY MACHINERY, NEC Net insider selling (90d)
Latest ACMR Insider Trades
About ACM Research, Inc. (ACMR) ACM Research Inc supplies capital equipment developed for the semiconductor industry. The company focuses on developing differentiated process solutions that enable effective particle removal, uniform material deposition, and reliable process control for the fabricators of integrated circuits. Its product offerings include wet-cleaning, plating, furnace, PECVD, track, and other front-end processing equipment. Additionally, it develops, manufactures, and sells a range of packaging equipment to wafer assembly and packaging customers. Geographically, the company generates maximum revenue from its customers in Mainland China, and the rest from other regions.
Headquarters FREMONT, CA
Employees 2,513
Listed 2017
Exchange XNAS https://www.acmr.com SEC filings for ACMR on EDGAR
90-Day SEC Filing Activity Form 4 transaction type Transactions Shares Total value Open-market sale 15 200,199 $15.30M Grant or award 7 27,592 Option exercise 10 400,398
ACMR Insider Transactions (Form 4) 160 47 Form 4 filings on record, the earliest from Oct 3, 2024, newest first. Filing history page 1 of 2.
Date Insider Transaction Security Shares Price Value Sep 8, 2026 DW David H. Wang - Officer Option exercise Class A Common Stock 70,000
Recent ACMR Form 8-K Filings 5
Recent ACMR Form 144 Notices of Proposed Sale 3 A Form 144 is notice of an INTENDED sale, not a completed one. It often precedes the Form 4 that reports the trade actually happening.
Filed Filer Relationship Shares Market value Notice Sep 9, 2026 HUI WANG Officer, Director, 10% Stockholder 70,000 $5.22M View on EDGAR Sep 8, 2026 HUI WANG Officer, Director, 10% Stockholder
ACMR Insider Trading - FAQ
What is the latest insider trade for ACMR? ACM Research, Inc. (ACMR) had 7 insider filings in the last 90 days, with the most recent on 2026-09-10. The full record for ACMR runs to 47 Form 4 filings, the earliest from 2024-10-03. InsiderAlpha tracks every Form 4, Form 144, and 8-K filing in real time.
How many insiders are buying ACMR stock? No insider purchases of ACMR were filed in the last 90 days.
How many insiders are selling ACMR stock? 15 insider sales of ACMR were filed in the last 90 days, totaling $15.30M.
Where can I see ACMR SEC filings (Form 4, 10-K, 10-Q, 8-K)? This page tracks ACMR Form 4 insider transactions, Form 144 sale notices, and 8-K material event disclosures in one timeline. Annual 10-K and quarterly 10-Q reports live on the company's SEC EDGAR page.
How can I follow ACMR insider buys? Create a free InsiderAlpha account and press Watch on this page to add ACMR to your watchlist. A free account also opens the full scored daily plan with every past day and 3 months of price history. No card is required. Sign up at https://insideralpha.ai/register.
More Industrials Companies with Insider Activity Every Form 4 below links to the original document on SEC EDGAR, so the numbers on this page can be checked against the filing they came from.
Related Companies - Recent Insider Activity What is SEC Form 4? The filing insiders must submit within two business days of a trade, and how to read its transaction codes. Track ACMR insider activity as it files Real-time Form 4 alerts, AI-scored daily trade ideas and 10b5-1 plan flags.
Sign up free Open-market sale
$3.96M
Market cap $4.51B
P/E ratio 32.00
Dividend yield -
Average volume 1.19M
52 week high $127.19
52 week low $28.46
Today's high $68.50
Today's low $65.94
Open $67.69
Volume 434.2K
Previous close $64.82
Shares outstanding 69.65M Market cap
$4.51B
2,513 employees
ACMR Insider Sentiment - Last 90 Days Share of open-market insider dollar volume that was buying versus selling, from SEC Form 4 filings.
0% Buying 100% Selling
0 insider purchases totaling $0 against 15 sales totaling $15.30M.
Most-Active ACMR Insiders - Last 90 Days 10 Dollar totals are shown for open-market purchases and sales only. Grants, option exercises, gifts and tax withholding are reported by share count because they are not trades at a market price.
Sep 8, 2026 DW David H. Wang - Officer Open-market sale Class A Common Stock 4,803 $75.99 $365K
Sep 8, 2026 DW David H. Wang - Officer Open-market sale Class A Common Stock 51,374 $77.15 $3.96M
Sep 8, 2026 DW David H. Wang - Officer Open-market sale Class A Common Stock 12,323 $78.08 $962K
Sep 8, 2026 DW David H. Wang - Officer Open-market sale Class A Common Stock 1,500 $78.57 $118K
Sep 9, 2026 DW David H. Wang - Officer Option exercise Class A Common Stock 70,000 $1.00 $70K
Sep 9, 2026 DW David H. Wang - Officer Open-market sale Class A Common Stock 33,493 $73.80 $2.47M
Sep 9, 2026 DW David H. Wang - Officer Open-market sale Class A Common Stock 18,934 $74.67 $1.41M
Sep 9, 2026 DW David H. Wang - Officer Open-market sale Class A Common Stock 11,666 $75.58 $882K
Sep 9, 2026 DW David H. Wang - Officer Open-market sale Class A Common Stock 4,807 $76.73 $369K
Sep 9, 2026 DW David H. Wang - Officer Open-market sale Class A Common Stock 1,100 $77.59 $85K
Sep 8, 2026 DW David H. Wang - Officer Option exercise Stock Option 70,000 $0.00 -
Sep 9, 2026 DW David H. Wang - Officer Option exercise Stock Option 70,000 $0.00 -
Aug 12, 2026 CP Charles C. Pappis - Director Grant or award Restricted Stock Units 728 $0.00 -
Aug 12, 2026 TL Tracy Liu - Director Grant or award Stock Option 6,400 $0.00 -
Aug 12, 2026 TL Tracy Liu - Director Grant or award Restricted Stock Units 728 $0.00 -
Aug 12, 2026 HD Haiping Dun - Director Grant or award Stock Option 6,400 $0.00 -
Aug 12, 2026 HD Haiping Dun - Director Grant or award Restricted Stock Units 728 $0.00 -
Aug 20, 2026 MM Mark McKechnie - Officer Option exercise Class A Common Stock 30,199 $19.49 $589K
Aug 20, 2026 MM Mark McKechnie - Officer Option exercise Class A Common Stock 25,000 $13.89 $347K
Aug 20, 2026 MM Mark McKechnie - Officer Open-market sale Class A Common Stock 13,625 $76.34 $1.04M
Aug 20, 2026 MM Mark McKechnie - Officer Open-market sale Class A Common Stock 30,365 $77.45 $2.35M
Aug 20, 2026 MM Mark McKechnie - Officer Open-market sale Class A Common Stock 11,209 $77.89 $873K
Aug 20, 2026 MM Mark McKechnie - Officer Option exercise Stock Option 30,199 $0.00 -
Aug 20, 2026 MM Mark McKechnie - Officer Option exercise Stock Option 25,000 $0.00 -
Aug 18, 2026 HD Haiping Dun - Director Option exercise Class A Common Stock 5,000 $5.60 $28K
Aug 18, 2026 HD Haiping Dun - Director Open-market sale Class A Common Stock 1,200 $80.29 $96K
Aug 18, 2026 HD Haiping Dun - Director Open-market sale Class A Common Stock 3,400 $81.31 $276K
Aug 18, 2026 HD Haiping Dun - Director Open-market sale Class A Common Stock 400 $82.17 $33K
Aug 18, 2026 HD Haiping Dun - Director Option exercise Stock Option 5,000 $0.00 -
May 13, 2026 DW David H. Wang - Officer Grant or award Restricted Stock Units 6,208 $0.00 -
Jun 4, 2026 SC Sotheara Cheav - Officer Option exercise Class A Common Stock 13,351 $13.89 $185K
Jun 5, 2026 SC Sotheara Cheav - Officer Option exercise Class A Common Stock 5,399 $13.89 $75K
Jun 4, 2026 SC Sotheara Cheav - Officer Open-market sale Class A Common Stock 1,300 $84.08 $109K
Jun 4, 2026 SC Sotheara Cheav - Officer Open-market sale Class A Common Stock 9,212 $85.11 $784K
Jun 4, 2026 SC Sotheara Cheav - Officer Open-market sale Class A Common Stock 2,839 $85.77 $244K
Jun 5, 2026 SC Sotheara Cheav - Officer Open-market sale Class A Common Stock 2,384 $81.73 $195K
Jun 5, 2026 SC Sotheara Cheav - Officer Open-market sale Class A Common Stock 968 $82.61 $80K
Jun 5, 2026 SC Sotheara Cheav - Officer Open-market sale Class A Common Stock 400 $84.01 $34K
Jun 5, 2026 SC Sotheara Cheav - Officer Open-market sale Class A Common Stock 1,647 $85.41 $141K
Jun 4, 2026 SC Sotheara Cheav - Officer Option exercise Stock Option 13,351 $0.00 -
Jun 5, 2026 SC Sotheara Cheav - Officer Option exercise Stock Option 5,399 $0.00 -
Jun 3, 2026 DW David H. Wang - Officer Option exercise Class A Common Stock 60,000 $1.00 $60K
Jun 4, 2026 DW David H. Wang - Officer Option exercise Class A Common Stock 40,002 $1.00 $40K
Jun 3, 2026 DW David H. Wang - Officer Open-market sale Class A Common Stock 4,300 $87.57 $377K
Jun 3, 2026 DW David H. Wang - Officer Open-market sale Class A Common Stock 6,295 $88.98 $560K
Jun 3, 2026 DW David H. Wang - Officer Open-market sale Class A Common Stock 32,450 $89.84 $2.92M
Jun 3, 2026 DW David H. Wang - Officer Open-market sale Class A Common Stock 9,925 $90.78 $901K
Jun 3, 2026 DW David H. Wang - Officer Open-market sale Class A Common Stock 5,843 $92.38 $540K
Jun 3, 2026 DW David H. Wang - Officer Open-market sale Class A Common Stock 1,187 $93.04 $110K
Jun 4, 2026 DW David H. Wang - Officer Open-market sale Class A Common Stock 2,060 $83.86 $173K
Jun 4, 2026 DW David H. Wang - Officer Open-market sale Class A Common Stock 17,543 $85.11 $1.49M
Jun 4, 2026 DW David H. Wang - Officer Open-market sale Class A Common Stock 10,992 $86.07 $946K
Jun 4, 2026 DW David H. Wang - Officer Open-market sale Class A Common Stock 8,581 $87.13 $748K
Jun 4, 2026 DW David H. Wang - Officer Open-market sale Class A Common Stock 826 $87.91 $73K
Jun 3, 2026 DW David H. Wang - Officer Option exercise Stock Option 60,000 $0.00 -
Jun 4, 2026 DW David H. Wang - Officer Option exercise Stock Option 40,002 $0.00 -
May 19, 2026 HD Haiping Dun Option exercise Class A Common Stock 5,000 $5.60 $28K
May 19, 2026 HD Haiping Dun Open-market sale Class A Common Stock 1,333 $63.84 $85K
May 19, 2026 HD Haiping Dun Open-market sale Class A Common Stock 500 $65.09 $33K
May 19, 2026 HD Haiping Dun Open-market sale Class A Common Stock 1,309 $67.21 $88K
May 19, 2026 HD Haiping Dun Open-market sale Class A Common Stock 1,858 $67.54 $125K
May 19, 2026 HD Haiping Dun Option exercise Stock Option 5,000 $0.00 -
Mar 12, 2026 MM Mark McKechnie - Officer Option exercise Class A Common Stock 60,000 $13.89 $833K
Mar 12, 2026 MM Mark McKechnie - Officer Open-market sale Class A Common Stock 11,910 $44.89 $535K
Mar 12, 2026 MM Mark McKechnie - Officer Open-market sale Class A Common Stock 47,108 $45.74 $2.15M
Mar 12, 2026 MM Mark McKechnie - Officer Option exercise Class A Common Stock 38,551 $19.49 $751K
Mar 12, 2026 MM Mark McKechnie - Officer Open-market sale Class A Common Stock 982 $46.55 $46K
Mar 12, 2026 MM Mark McKechnie - Officer Open-market sale Class A Common Stock 8,639 $44.94 $388K
Mar 12, 2026 MM Mark McKechnie - Officer Open-market sale Class A Common Stock 29,348 $45.74 $1.34M
Mar 12, 2026 MM Mark McKechnie - Officer Open-market sale Class A Common Stock 564 $46.57 $26K
Mar 12, 2026 MM Mark McKechnie - Officer Option exercise Stock Option 60,000 $0.00 -
Mar 12, 2026 MM Mark McKechnie - Officer Option exercise Stock Option 38,551 $0.00 -
Mar 11, 2026 DW David H. Wang - Officer Option exercise Class A Common Stock 60,000 $1.00 $60K
Mar 12, 2026 DW David H. Wang - Officer Option exercise Class A Common Stock 50,000 $1.00 $50K
Mar 11, 2026 DW David H. Wang - Officer Open-market sale Class A Common Stock 55,373 $47.89 $2.65M
Mar 11, 2026 DW David H. Wang - Officer Open-market sale Class A Common Stock 4,627 $48.34 $224K
Mar 12, 2026 DW David H. Wang - Officer Open-market sale Class A Common Stock 10,561 $44.92 $474K
Mar 12, 2026 DW David H. Wang - Officer Open-market sale Class A Common Stock 38,737 $45.74 $1.77M
Mar 12, 2026 DW David H. Wang - Officer Open-market sale Class A Common Stock 702 $46.57 $33K
Mar 11, 2026 DW David H. Wang - Officer Option exercise Stock Option 60,000 $0.00 -
Mar 12, 2026 DW David H. Wang - Officer Option exercise Stock Option 50,000 $0.00 -
Mar 11, 2026 TL Tracy Liu Open-market sale Class A Common Stock 11,623 $47.81 $556K
Mar 11, 2026 TL Tracy Liu Open-market sale Class A Common Stock 3,377 $48.25 $163K
Mar 10, 2026 TL Tracy Liu Option exercise Stock Option 45,000 $0.00 -
Mar 11, 2026 TL Tracy Liu Option exercise Stock Option 15,000 $0.00 -
Mar 10, 2026 TL Tracy Liu Option exercise Class A Common Stock 45,000 $1.00 $45K
Mar 11, 2026 TL Tracy Liu Option exercise Class A Common Stock 15,000 $1.00 $15K
Mar 10, 2026 TL Tracy Liu Open-market sale Class A Common Stock 32,216 $47.06 $1.52M
Mar 10, 2026 TL Tracy Liu Open-market sale Class A Common Stock 12,784 $48.19 $616K
Mar 9, 2026 HD Haiping Dun Open-market sale Class A Common Stock 900 $43.94 $40K
Mar 9, 2026 HD Haiping Dun Option exercise Stock Option 5,000 $0.00 -
Mar 9, 2026 HD Haiping Dun Option exercise Class A Common Stock 5,000 $5.60 $28K
Mar 9, 2026 HD Haiping Dun Open-market sale Class A Common Stock 4,100 $43.37 $178K
Mar 6, 2026 LF Lisa Feng - Officer Open-market sale Class A Common Stock 200 $46.58 $9K
Mar 5, 2026 LF Lisa Feng - Officer Option exercise Stock Option 15,000 $0.00 -
Mar 6, 2026 LF Lisa Feng - Officer Option exercise Stock Option 15,000 $0.00 -
Mar 5, 2026 LF Lisa Feng - Officer Option exercise Class A Common Stock 15,000 $4.55 $68K
Mar 6, 2026 LF Lisa Feng - Officer Option exercise Class A Common Stock 15,000 $4.55 $68K
Mar 5, 2026 LF Lisa Feng - Officer Open-market sale Class A Common Stock 8,050 $49.81 $401K
Mar 5, 2026 LF Lisa Feng - Officer Open-market sale Class A Common Stock 6,950 $50.24 $349K
Mar 6, 2026 LF Lisa Feng - Officer Open-market sale Class A Common Stock 14,800 $46.07 $682K
Feb 4, 2026 DW David H. Wang - Officer Grant or award Stock Option 545,400 $0.00 -
Dec 3, 2025 DW David H. Wang - Officer Option exercise Class A Common Stock 70,000 $1.00 $70K
Dec 4, 2025 DW David H. Wang - Officer Option exercise Class A Common Stock 60,000 $1.00 $60K
Dec 3, 2025 DW David H. Wang - Officer Open-market sale Class A Common Stock 68,800 $33.05 $2.27M
Dec 3, 2025 DW David H. Wang - Officer Open-market sale Class A Common Stock 1,200 $33.56 $40K
Dec 4, 2025 DW David H. Wang - Officer Open-market sale Class A Common Stock 19,817 $33.52 $664K
Dec 4, 2025 DW David H. Wang - Officer Open-market sale Class A Common Stock 40,183 $34.42 $1.38M
Dec 3, 2025 DW David H. Wang - Officer Option exercise Stock Option 70,000 $0.00 -
Dec 4, 2025 DW David H. Wang - Officer Option exercise Stock Option 60,000 $0.00 -
Dec 2, 2025 FC Fuping Chen - Officer Option exercise Class A Common Stock 100,000 $1.77 $177K
Dec 2, 2025 FC Fuping Chen - Officer Open-market sale Class A Common Stock 100,000 $33.20 $3.32M
Dec 3, 2025 FC Fuping Chen - Officer Option exercise Class A Common Stock 20,000 $1.77 $35K
Dec 3, 2025 FC Fuping Chen - Officer Open-market sale Class A Common Stock 19,700 $33.05 $651K
Dec 3, 2025 FC Fuping Chen - Officer Open-market sale Class A Common Stock 300 $33.57 $10K
Dec 2, 2025 FC Fuping Chen - Officer Option exercise Stock Option 100,000 $0.00 -
Dec 3, 2025 FC Fuping Chen - Officer Option exercise Stock Option 20,000 $0.00 -
Nov 12, 2025 HD Haiping Dun Gift Class A Common Stock 755,090 $0.00 -
Nov 13, 2025 LF Lisa Feng - Officer Option exercise Stock Option 15,000 $0.00 -
Nov 12, 2025 LF Lisa Feng - Officer Option exercise Class A Common Stock 15,000 $5.60 $84K
Nov 12, 2025 LF Lisa Feng - Officer Open-market sale Class A Common Stock 15,000 $32.76 $491K
Nov 13, 2025 LF Lisa Feng - Officer Option exercise Class A Common Stock 15,000 $5.60 $84K
Nov 13, 2025 LF Lisa Feng - Officer Open-market sale Class A Common Stock 15,000 $33.77 $507K
Nov 12, 2025 LF Lisa Feng - Officer Option exercise Stock Option 15,000 $0.00 -
Oct 27, 2025 DW David H. Wang - Officer Grant or award Stock Option 545,400 $0.00 -
Sep 18, 2025 JW Jian Wang - Officer Option exercise Class A Common Stock 30,000 $5.60 $168K
Sep 18, 2025 JW Jian Wang - Officer Open-market sale Class A Common Stock 30,000 $35.00 $1.05M
Sep 18, 2025 JW Jian Wang - Officer Option exercise Stock Option 30,000 $0.00 -
Sep 18, 2025 SC Sotheara Cheav - Officer Option exercise Class A Common Stock 10,000 $13.89 $139K
Sep 18, 2025 SC Sotheara Cheav - Officer Open-market sale Class A Common Stock 10,000 $35.00 $350K
Sep 18, 2025 SC Sotheara Cheav - Officer Option exercise Stock Option 10,000 $0.00 -
Sep 17, 2025 TL Tracy Liu Option exercise Class A Common Stock 15,000 $1.00 $15K
Sep 17, 2025 TL Tracy Liu Open-market sale Class A Common Stock 15,000 $33.00 $495K
Sep 17, 2025 TL Tracy Liu Option exercise Stock Option 15,000 $0.00 -
Sep 8, 2025 DW David H. Wang - Officer Option exercise Class A Common Stock 130,000 $1.00 $130K
Sep 8, 2025 DW David H. Wang - Officer Option exercise Stock Option 130,000 $0.00 -
Sep 3, 2025 DW David H. Wang - Officer Option exercise Class A Common Stock 70,000 $1.00 $70K
Sep 3, 2025 DW David H. Wang - Officer Open-market sale Class A Common Stock 66,057 $26.73 $1.77M
Sep 3, 2025 DW David H. Wang - Officer Open-market sale Class A Common Stock 3,943 $27.31 $108K
Sep 4, 2025 DW David H. Wang - Officer Option exercise Class A Common Stock 60,000 $1.00 $60K
Sep 4, 2025 DW David H. Wang - Officer Open-market sale Class A Common Stock 60,000 $26.44 $1.59M
Sep 3, 2025 DW David H. Wang - Officer Option exercise Stock Option 70,000 $0.00 -
Sep 4, 2025 DW David H. Wang - Officer Option exercise Stock Option 60,000 $0.00 -
Aug 22, 2025 JW Jian Wang - Officer Option exercise Class A Common Stock 30,000 $5.60 $168K
Aug 22, 2025 JW Jian Wang - Officer Open-market sale Class A Common Stock 30,000 $30.00 $900K
Aug 25, 2025 JW Jian Wang - Officer Option exercise Class A Common Stock 30,000 $5.60 $168K
Aug 25, 2025 JW Jian Wang - Officer Open-market sale Class A Common Stock 30,000 $32.00 $960K
Aug 22, 2025 JW Jian Wang - Officer Option exercise Stock Option 30,000 $0.00 -
Aug 25, 2025 JW Jian Wang - Officer Option exercise Stock Option 30,000 $0.00 -
Aug 22, 2025 SC Sotheara Cheav - Officer Option exercise Class A Common Stock 11,152 $13.89 $155K
Aug 22, 2025 SC Sotheara Cheav - Officer Open-market sale Class A Common Stock 11,152 $30.00 $335K
Aug 22, 2025 SC Sotheara Cheav - Officer Option exercise Stock Option 11,152 $0.00 -
AGC $ERII
Energy Recovery, Inc.
