SEC Form 4 reporting owner

Wang David H

Wang David H has filed 39 Form 4 transactions reported between December 3, 2025 and September 9, 2026, as a reporting owner of ACM Research, Inc..

Name as filed: Wang David H

Open-market buys, 24 mo

None

reported

Open-market sales, 24 mo

$29.0M

29 lines

Companies

with Form 4 filings

Latest transaction

Sep 9, 2026

transaction date

Roles and reported holdings

ACMRACM Research, Inc.
Dec 3, 2025 – Sep 9, 2026
Reporting owner
Held directly802,708 sh as of Sep 9, 2026 · Form 4
24 months: $29.0M sold

Transaction history

All 39 reported transactions, newest first. Every row links to the Form 4 on SEC EDGAR.

Date	Company	Type	Shares	Price	Value	Owned after	Filing
Sep 9, 2026	ACMR	Open-market saleCode S · direct	1,100	$77.59	$85K@ $77.59	802,708	Form 4
Sep 9, 2026	ACMR	Open-market saleCode S · direct	4,807	$76.73	$369K@ $76.73	803,808	Form 4
Sep 9, 2026	ACMR	Open-market saleCode S · direct	11,666	$75.58	$882K@ $75.58	808,615	Form 4
Sep 9, 2026	ACMR	Open-market saleCode S · direct	18,934	$74.67	$1.4M@ $74.67	820,281	Form 4
Sep 9, 2026	ACMR	Open-market saleCode S · direct	33,493	$73.80	$2.5M@ $73.80	839,215	Form 4
Sep 9, 2026	ACMR	Option exerciseCode M · direct	70,000	$1.00	$70K@ $1.00	872,708	Form 4
Sep 8, 2026	ACMR	Open-market saleCode S · direct	1,500	$78.57	$118K@ $78.57	802,708	Form 4
Sep 8, 2026	ACMR	Open-market saleCode S · direct	12,323	$78.08	$962K@ $78.08	804,208	Form 4
Sep 8, 2026	ACMR	Open-market saleCode S · direct	51,374	$77.15	$4.0M@ $77.15	816,531	Form 4
Sep 8, 2026	ACMR	Open-market saleCode S · direct	4,803	$75.99	$365K@ $75.99	867,905	Form 4
Sep 8, 2026	ACMR	Option exerciseCode M · direct	70,000	$1.00	$70K@ $1.00	872,708	Form 4
Jun 4, 2026	ACMR	Open-market saleCode S · direct	826	$87.91	$73K@ $87.91	802,708	Form 4
Jun 4, 2026	ACMR	Open-market saleCode S · direct	8,581	$87.13	$748K@ $87.13	803,534	Form 4
Jun 4, 2026	ACMR	Open-market saleCode S · direct	10,992	$86.07	$946K@ $86.07	812,115	Form 4
Jun 4, 2026	ACMR	Open-market saleCode S · direct	17,543	$85.11	$1.5M@ $85.11	823,107	Form 4
Jun 4, 2026	ACMR	Open-market saleCode S · direct	2,060	$83.86	$173K@ $83.86	840,650	Form 4
Jun 4, 2026	ACMR	Option exerciseCode M · direct	40,002	$1.00	$40K@ $1.00	842,710	Form 4
Jun 3, 2026	ACMR	Open-market saleCode S · direct	1,187	$93.04	$110K@ $93.04	802,708	Form 4
Jun 3, 2026	ACMR	Open-market saleCode S · direct	5,843	$92.38	$540K@ $92.38	803,895	Form 4
Jun 3, 2026	ACMR	Open-market saleCode S · direct	9,925	$90.78	$901K@ $90.78	809,738	Form 4
Jun 3, 2026	ACMR	Open-market saleCode S · direct	32,450	$89.84	$2.9M@ $89.84	819,663	Form 4
Jun 3, 2026	ACMR	Open-market saleCode S · direct	6,295	$88.98	$560K@ $88.98	852,113	Form 4
Jun 3, 2026	ACMR	Open-market saleCode S · direct	4,300	$87.57	$377K@ $87.57	858,408	Form 4
Jun 3, 2026	ACMR	Option exerciseCode M · direct	60,000	$1.00	$60K@ $1.00	862,708	Form 4
May 13, 2026	ACMR	Grant or awardCode A · indirect	6,208	—	—	6,208	Form 4
Mar 12, 2026	ACMR	Open-market saleCode S · direct	702	$46.57	$33K@ $46.57	802,708	Form 4
Mar 12, 2026	ACMR	Open-market saleCode S · direct	38,737	$45.74	$1.8M@ $45.74	803,410	Form 4
Mar 12, 2026	ACMR	Open-market saleCode S · direct	10,561	$44.92	$474K@ $44.92	842,147	Form 4
Mar 12, 2026	ACMR	Option exerciseCode M · direct	50,000	$1.00	$50K@ $1.00	852,708	Form 4
Mar 11, 2026	ACMR	Open-market saleCode S · direct	4,627	$48.34	$224K@ $48.34	802,708	Form 4
Mar 11, 2026	ACMR	Open-market saleCode S · direct	55,373	$47.89	$2.7M@ $47.89	807,335	Form 4
Mar 11, 2026	ACMR	Option exerciseCode M · direct	60,000	$1.00	$60K@ $1.00	862,708	Form 4
Feb 4, 2026	ACMR	Grant or awardCode A · direct	545,400	—	—	1,636,197	Form 4
Dec 4, 2025	ACMR	Open-market saleCode S · direct	40,183	$34.42	$1.4M@ $34.42	802,708	Form 4
Dec 4, 2025	ACMR	Open-market saleCode S · direct	19,817	$33.52	$664K@ $33.52	842,891	Form 4
Dec 4, 2025	ACMR	Option exerciseCode M · direct	60,000	$1.00	$60K@ $1.00	862,708	Form 4
Dec 3, 2025	ACMR	Open-market saleCode S · direct	1,200	$33.56	$40K@ $33.56	802,708	Form 4
Dec 3, 2025	ACMR	Open-market saleCode S · direct	68,800	$33.05	$2.3M@ $33.05	803,908	Form 4
Dec 3, 2025	ACMR	Option exerciseCode M · direct	70,000	$1.00	$70K@ $1.00	872,708	Form 4

How this page is built

Every row comes from a Form 4 filed with the SEC, which officers, directors and holders of more than 10% of a company’s stock must file within two business days of a trade. Transactions are grouped by the reporting owner’s name as filed (spacing, capitals and punctuation ignored); two different people filing under an identical name would appear together, and one person filing under two spellings appears on two pages.

Open-market totals count code P purchases and code S sales over the last 24 months. The same trade reported on more than one filing is counted once; when another owner (for example a fund and its general partner) reports the identical trade, they are listed beside it. Holdings are the shares owned after the latest purchase, sale, gift or tax-withholding line, shown separately for direct and indirect ownership; an indirect figure is one holding line, not a total across every trust or entity.

This page describes what was filed with the SEC; it is not investment advice or a recommendation to buy or sell any security.