ACMR Insider Trading

Net Selling · 180d
Open-Market Buys (180d)
$0
0 insiders
Open-Market Sells (180d)
$25.4M
7 insiders
Net Insider Flow
-$25.4M
open market, 180d
Reporting Insiders
7
45 P/S transactions
Build

Build on these Form 4 transactions

The public view is the crawlable proof. The same sourced dataset is available through REST and MCP for agents, research scripts, and back-office tools.

Recent Form 4 Transactions

100 shown
DateInsiderRoleActionSharesPriceValue
Jun 5, 2026Cheav SothearaSee remarksOption exercise(M)5K$13.89$75K
Jun 5, 2026Cheav SothearaSee remarksSell(S)2K$81.73$195K
Jun 5, 2026Cheav SothearaSee remarksSell(S)968$82.61$80K
Jun 5, 2026Cheav SothearaSee remarksSell(S)400$84.01$34K
Jun 5, 2026Cheav SothearaSee remarksSell(S)2K$85.41$141K
Jun 5, 2026Cheav SothearaSee remarksOption exercise(M)5K$0
Jun 4, 2026Cheav SothearaSee remarksOption exercise(M)13K$13.89$185K
Jun 4, 2026Cheav SothearaSee remarksSell(S)1K$84.08$109K
Jun 4, 2026Cheav SothearaSee remarksSell(S)9K$85.11$784K
Jun 4, 2026Cheav SothearaSee remarksSell(S)3K$85.77$244K
Jun 4, 2026Cheav SothearaSee remarksOption exercise(M)13K$0
Jun 4, 2026Wang David HSee Remarks, Director, 10% OwnerOption exercise(M)40K$1.00$40K
Jun 4, 2026Wang David HSee Remarks, Director, 10% OwnerSell(S)2K$83.86$173K
Jun 4, 2026Wang David HSee Remarks, Director, 10% OwnerSell(S)18K$85.11$1.5M
Jun 4, 2026Wang David HSee Remarks, Director, 10% OwnerSell(S)11K$86.07$946K
Jun 4, 2026Wang David HSee Remarks, Director, 10% OwnerSell(S)9K$87.13$748K
Jun 4, 2026Wang David HSee Remarks, Director, 10% OwnerSell(S)826$87.91$73K
Jun 4, 2026Wang David HSee Remarks, Director, 10% OwnerOption exercise(M)40K$0
Jun 3, 2026Wang David HSee Remarks, Director, 10% OwnerOption exercise(M)60K$1.00$60K
Jun 3, 2026Wang David HSee Remarks, Director, 10% OwnerSell(S)4K$87.57$377K
Jun 3, 2026Wang David HSee Remarks, Director, 10% OwnerSell(S)6K$88.98$560K
Jun 3, 2026Wang David HSee Remarks, Director, 10% OwnerSell(S)32K$89.84$2.9M
Jun 3, 2026Wang David HSee Remarks, Director, 10% OwnerSell(S)10K$90.78$901K
Jun 3, 2026Wang David HSee Remarks, Director, 10% OwnerSell(S)6K$92.38$540K
Jun 3, 2026Wang David HSee Remarks, Director, 10% OwnerSell(S)1K$93.04$110K
Jun 3, 2026Wang David HSee Remarks, Director, 10% OwnerOption exercise(M)60K$0
May 19, 2026Dun HaipingDirectorOption exercise(M)5K$5.60$28K
May 19, 2026Dun HaipingDirectorSell(S)1K$63.84$85K
May 19, 2026Dun HaipingDirectorSell(S)500$65.09$33K
May 19, 2026Dun HaipingDirectorSell(S)1K$67.21$88K
May 19, 2026Dun HaipingDirectorSell(S)2K$67.54$125K
May 19, 2026Dun HaipingDirectorOption exercise(M)5K$0
May 13, 2026Wang David HSee Remarks, Director, 10% OwnerGrant(A)6K$0
Apr 17, 2026Pappis Charles CDirectorOption exercise(M)5K$29.18$146K
Apr 17, 2026Pappis Charles CDirectorSell(S)5K$52.00$260K
Apr 17, 2026Pappis Charles CDirectorOption exercise(M)5K$0
Mar 12, 2026Wang David HSee Remarks, Director, 10% OwnerSell(S)702$46.57$33K
Mar 12, 2026Wang David HSee Remarks, Director, 10% OwnerOption exercise(M)50K$1.00$50K
Mar 12, 2026Wang David HSee Remarks, Director, 10% OwnerSell(S)11K$44.92$474K
Mar 12, 2026Wang David HSee Remarks, Director, 10% OwnerSell(S)39K$45.74$1.8M
Mar 12, 2026Wang David HSee Remarks, Director, 10% OwnerOption exercise(M)50K$0
Mar 12, 2026McKechnie MarkSee RemarksSell(S)564$46.57$26K
Mar 12, 2026McKechnie MarkSee RemarksSell(S)29K$45.74$1.3M
Mar 12, 2026McKechnie MarkSee RemarksSell(S)9K$44.94$388K
Mar 12, 2026McKechnie MarkSee RemarksOption exercise(M)39K$19.49$751K
Mar 12, 2026McKechnie MarkSee RemarksSell(S)982$46.55$46K
Mar 12, 2026McKechnie MarkSee RemarksSell(S)47K$45.74$2.2M
Mar 12, 2026McKechnie MarkSee RemarksSell(S)12K$44.89$535K
Mar 12, 2026McKechnie MarkSee RemarksOption exercise(M)60K$13.89$833K
Mar 12, 2026McKechnie MarkSee RemarksOption exercise(M)39K$0
Mar 12, 2026McKechnie MarkSee RemarksOption exercise(M)60K$0
Mar 11, 2026Liu TracyDirectorOption exercise(M)15K$1.00$15K
Mar 11, 2026Liu TracyDirectorSell(S)3K$48.25$163K
Mar 11, 2026Liu TracyDirectorSell(S)12K$47.81$556K
Mar 11, 2026Liu TracyDirectorOption exercise(M)15K$0
Mar 11, 2026Wang David HSee Remarks, Director, 10% OwnerOption exercise(M)60K$1.00$60K
Mar 11, 2026Wang David HSee Remarks, Director, 10% OwnerSell(S)55K$47.89$2.7M
Mar 11, 2026Wang David HSee Remarks, Director, 10% OwnerSell(S)5K$48.34$224K
Mar 11, 2026Wang David HSee Remarks, Director, 10% OwnerOption exercise(M)60K$0
Mar 10, 2026Liu TracyDirectorSell(S)13K$48.19$616K
Mar 10, 2026Liu TracyDirectorSell(S)32K$47.06$1.5M
Mar 10, 2026Liu TracyDirectorOption exercise(M)45K$1.00$45K
Mar 10, 2026Liu TracyDirectorOption exercise(M)45K$0
Mar 9, 2026Dun HaipingDirectorSell(S)900$43.94$40K
Mar 9, 2026Dun HaipingDirectorSell(S)4K$43.37$178K
Mar 9, 2026Dun HaipingDirectorOption exercise(M)5K$5.60$28K
Mar 9, 2026Dun HaipingDirectorOption exercise(M)5K$0
Mar 6, 2026Feng LisaSee remarksOption exercise(M)15K$4.55$68K
Mar 6, 2026Feng LisaSee remarksSell(S)15K$46.07$682K
Mar 6, 2026Feng LisaSee remarksSell(S)200$46.58$9K
Mar 6, 2026Feng LisaSee remarksOption exercise(M)15K$0
Mar 5, 2026Feng LisaSee remarksSell(S)7K$50.24$349K
Mar 5, 2026Feng LisaSee remarksOption exercise(M)15K$4.55$68K
Mar 5, 2026Feng LisaSee remarksSell(S)8K$49.81$401K
Mar 5, 2026Feng LisaSee remarksOption exercise(M)15K$0
Mar 5, 2026Pappis Charles CDirectorSell(S)5K$50.09$250K
Mar 5, 2026Pappis Charles CDirectorOption exercise(M)5K$29.18$146K
Mar 5, 2026Pappis Charles CDirectorOption exercise(M)5K$0
Feb 4, 2026Wang David HSee Remarks, Director, 10% OwnerGrant(A)545K$0
Dec 8, 2025McKechnie MarkSee RemarksOption exercise(M)23K$25.45$573K
Dec 8, 2025McKechnie MarkSee RemarksSell(S)23K$35.45$798K
Dec 8, 2025McKechnie MarkSee RemarksOption exercise(M)23K$0
Dec 4, 2025Wang David HSee Remarks, Director, 10% OwnerSell(S)40K$34.42$1.4M
Dec 4, 2025Wang David HSee Remarks, Director, 10% OwnerSell(S)20K$33.52$664K
Dec 4, 2025Wang David HSee Remarks, Director, 10% OwnerOption exercise(M)60K$1.00$60K
Dec 4, 2025Wang David HSee Remarks, Director, 10% OwnerOption exercise(M)60K$0
Dec 4, 2025McKechnie MarkSee RemarksSell(S)8K$33.50$260K
Dec 4, 2025McKechnie MarkSee RemarksOption exercise(M)9K$4.55$40K
Dec 4, 2025McKechnie MarkSee RemarksSell(S)996$34.26$34K
Dec 4, 2025McKechnie MarkSee RemarksOption exercise(M)9K$0
Dec 3, 2025Chen FupingSee remarksSell(S)20K$33.05$651K
Dec 3, 2025Chen FupingSee remarksOption exercise(M)20K$1.77$35K
Dec 3, 2025Chen FupingSee remarksSell(S)300$33.57$10K
Dec 3, 2025Chen FupingSee remarksOption exercise(M)20K$0
Dec 3, 2025Wang David HSee Remarks, Director, 10% OwnerSell(S)69K$33.05$2.3M
Dec 3, 2025Wang David HSee Remarks, Director, 10% OwnerSell(S)1K$33.56$40K
Dec 3, 2025Wang David HSee Remarks, Director, 10% OwnerOption exercise(M)70K$1.00$70K
Dec 3, 2025Wang David HSee Remarks, Director, 10% OwnerOption exercise(M)70K$0
Dec 2, 2025Chen FupingSee remarksSell(S)100K$33.20$3.3M
Dec 2, 2025Chen FupingSee remarksOption exercise(M)100K$1.77$177K

Data Source

Insider transactions sourced from SEC EDGAR Form 4 filings, normalized within minutes of acceptance. "Buy"/"Sell" mark open-market transactions (codes P/S), the tradeable signal. Awards, option exercises and tax-withholding are shown with their raw code. All data is public domain.

Coverage: Form 4 filings indexed 2021-01-042026-07-21. Earlier history is backfilling; this window widens as it deepens.

Programmatic access via the Arkolith API & MCP server (insider.transactions, insider.company).