David H. Wang

CIK: 0001721580

Transaction Breakdown

Open Market Buys (P)0 (0.0%)

High conviction signal

Open Market Sales (S)43 (68.3%)

Position reduction

Option Exercises (M)15 (23.8%)

Derivative conversions

Awards (A)3 (4.8%)

Compensation grants

Other (G, F, J, C, D, …)2 (3.2%)

Gifts, tax withholding, conversions, dispositions to the issuer and other codes

Companies & Roles (1)

ACMR

ACM Research, Inc.

DirectorOfficer10% Owner

Discretionary Trading P&L

Holdings

Transaction History (63 total)

ACMR
ACM Research, Inc.
Sep 9, 2026
Sale(S)
Direct
11.7K shares at avg. $75.58$882K
ACMR
ACM Research, Inc.
Sep 9, 2026
Sale(S)
Direct
4.8K shares at avg. $76.73$369K
ACMR
ACM Research, Inc.
Sep 9, 2026
Sale(S)
Direct
1.1K shares at avg. $77.59$85K
ACMR
ACM Research, Inc.
Sep 9, 2026
Exercise(M)
Direct
70K shares at avg. $1.00$70K
ACMR
ACM Research, Inc.
Sep 9, 2026
Sale(S)
Direct
33.5K shares at avg. $73.80$2.5M
ACMR
ACM Research, Inc.
Sep 9, 2026
Sale(S)
Direct
18.9K shares at avg. $74.67$1.4M
ACMR
ACM Research, Inc.
Sep 8, 2026
Sale(S)
Direct
12.3K shares at avg. $78.08$962K
ACMR
ACM Research, Inc.
Sep 8, 2026
Sale(S)
Direct
4.8K shares at avg. $75.99$365K
ACMR
ACM Research, Inc.
Sep 8, 2026
Sale(S)
Direct
1.5K shares at avg. $78.57$118K
ACMR
ACM Research, Inc.
Sep 8, 2026
Exercise(M)
Direct
70K shares at avg. $1.00$70K
ACMR
ACM Research, Inc.
Sep 8, 2026
Sale(S)
Direct
51.4K shares at avg. $77.15$4.0M
ACMR
ACM Research, Inc.
Jun 4, 2026
Sale(S)
Direct
826 shares at avg. $87.91$73K
ACMR
ACM Research, Inc.
Jun 4, 2026
Exercise(M)
Direct
40K shares at avg. $1.00$40K
ACMR
ACM Research, Inc.
Jun 4, 2026
Sale(S)
Direct
17.5K shares at avg. $85.11$1.5M
ACMR
ACM Research, Inc.
Jun 4, 2026
Sale(S)
Direct
2.1K shares at avg. $83.86$173K
ACMR
ACM Research, Inc.
Jun 4, 2026
Sale(S)
Direct
8.6K shares at avg. $87.13$748K
ACMR
ACM Research, Inc.
Jun 4, 2026
Sale(S)
Direct
11K shares at avg. $86.07$946K
ACMR
ACM Research, Inc.
Jun 3, 2026
Sale(S)
Direct
6.3K shares at avg. $88.98$560K
ACMR
ACM Research, Inc.
Jun 3, 2026
Sale(S)
Direct
9.9K shares at avg. $90.78$901K
ACMR
ACM Research, Inc.
Jun 3, 2026
Sale(S)
Direct
5.8K shares at avg. $92.38$540K
ACMR
ACM Research, Inc.
Jun 3, 2026
Sale(S)
Direct
1.2K shares at avg. $93.04$110K
ACMR
ACM Research, Inc.
Jun 3, 2026
Exercise(M)
Direct
60K shares at avg. $1.00$60K
ACMR
ACM Research, Inc.
Jun 3, 2026
Sale(S)
Direct
4.3K shares at avg. $87.57$377K
ACMR
ACM Research, Inc.
Jun 3, 2026
Sale(S)
Direct
32.5K shares at avg. $89.84$2.9M
ACMR
ACM Research, Inc.
May 13, 2026
Award(A)
Restricted Stock Units
Indirect
6.2K shares-

		Type	Shares	Price		Ownership
Sep 9, 2026	ACMR ACM Research, Inc.	Sale(S)	11,666	$75.58	$881,716	Direct
Sep 9, 2026	ACMR ACM Research, Inc.	Sale(S)	4,807	$76.73	$368,841	Direct
Sep 9, 2026	ACMR ACM Research, Inc.	Sale(S)	1,100	$77.59	$85,349	Direct
Sep 9, 2026	ACMR ACM Research, Inc.	Exercise(M)	70,000	$1.00	$70,000	Direct
Sep 9, 2026	ACMR ACM Research, Inc.	Sale(S)	33,493	$73.80	$2,471,783	Direct
Sep 9, 2026	ACMR ACM Research, Inc.	Sale(S)	18,934	$74.67	$1,413,802	Direct
Sep 8, 2026	ACMR ACM Research, Inc.	Sale(S)	12,323	$78.08	$962,180	Direct
Sep 8, 2026	ACMR ACM Research, Inc.	Sale(S)	4,803	$75.99	$364,980	Direct
Sep 8, 2026	ACMR ACM Research, Inc.	Sale(S)	1,500	$78.57	$117,855	Direct
Sep 8, 2026	ACMR ACM Research, Inc.	Exercise(M)	70,000	$1.00	$70,000	Direct
Sep 8, 2026	ACMR ACM Research, Inc.	Sale(S)	51,374	$77.15	$3,963,504	Direct
Jun 4, 2026	ACMR ACM Research, Inc.	Sale(S)	826	$87.91	$72,614	Direct
Jun 4, 2026	ACMR ACM Research, Inc.	Exercise(M)	40,002	$1.00	$40,002	Direct
Jun 4, 2026	ACMR ACM Research, Inc.	Sale(S)	17,543	$85.11	$1,493,085	Direct
Jun 4, 2026	ACMR ACM Research, Inc.	Sale(S)	2,060	$83.86	$172,752	Direct
Jun 4, 2026	ACMR ACM Research, Inc.	Sale(S)	8,581	$87.13	$747,663	Direct
Jun 4, 2026	ACMR ACM Research, Inc.	Sale(S)	10,992	$86.07	$946,081	Direct
Jun 3, 2026	ACMR ACM Research, Inc.	Sale(S)	6,295	$88.98	$560,129	Direct
Jun 3, 2026	ACMR ACM Research, Inc.	Sale(S)	9,925	$90.78	$900,992	Direct
Jun 3, 2026	ACMR ACM Research, Inc.	Sale(S)	5,843	$92.38	$539,776	Direct
Jun 3, 2026	ACMR ACM Research, Inc.	Sale(S)	1,187	$93.04	$110,438	Direct
Jun 3, 2026	ACMR ACM Research, Inc.	Exercise(M)	60,000	$1.00	$60,000	Direct
Jun 3, 2026	ACMR ACM Research, Inc.	Sale(S)	4,300	$87.57	$376,551	Direct
Jun 3, 2026	ACMR ACM Research, Inc.	Sale(S)	32,450	$89.84	$2,915,308	Direct
May 13, 2026	ACMR ACM Research, Inc.	Award(A) Restricted Stock Units	6,208	-	-	Indirect

1-25 of 63 transactions

About Wang David H

Wang David H (SEC CIK 0001721580) files insider reports with the SEC as Director of ACM Research, Inc. (ACMR).

Signal8 holds 16 ownership filings by Wang David H, all Form 4s, filed between Nov 18, 2024 and Sep 10, 2026. Those filings report 63 transactions, from Nov 14, 2024 to Sep 9, 2026. Signal8's Form 4 history starts in Sep 2024.

The business address on Wang David H's filings is in FREMONT, CA.

Recent filings by Wang David H

Sep 9, 2026: Open-market sales of ACMR shares (3 lines, Form 4, code S).
Sep 9, 2026: Option exercise of ACMR shares (Form 4, code M).
Sep 9, 2026: Open-market sales of ACMR shares (2 lines, Form 4, code S).
Sep 8, 2026: Open-market sales of ACMR shares (3 lines, Form 4, code S).
Sep 8, 2026: Option exercise of ACMR shares (Form 4, code M).

Other insiders filing for ACM Research, Inc. (ACMR)

How to read Form 4 transaction codes