ACMR | ACM RESEARCH-A | Owners

S&P 500$7,656.98
+0.86%
2m
DOW 30$52,573.29
+0.98%
2m
NASDAQ 100$29,368.44
+0.91%
2m
Russell 2000$288.89
+0.41%
2m
Russell 1000$417.91
+0.87%
2m
S&P 400$3,714.14
+0.83%
2m
S&P 600$1,726.18
+0.55%
2m

ACM RESEARCH-A (ACMR)

NASDAQ

$72.23+$0.22 (+0.31%)

Price as of Sep 11, 2026 7:30 PM EDT

$4.7B
Market Cap
141.13%
1-Year Change
Semiconductor Equipment & Materials
Industry

Top Holders

Institutional

Mutual Funds

Holder	Ownership %	Shares Held	Change (Shares, %)	Report Date
BLACKROCK, INC.	13.51%	8.7M	+675,995 (+7.81%)	Jun 30, 2026
VANGUARD GROUP INC	7.75%	5.0M	+125,690 (+2.53%)	Dec 31, 2025
BLACKROCK FUNDING, INC. /DE	7.65%	4.9M	+460,908 (+9.40%)	Dec 31, 2024
YIHENG CAPITAL LLC	6.62%	4.2M	+1.7M (+40.34%)	Dec 31, 2021
BLACKROCK INC.	6.35%	4.1M	+109,303 (+2.69%)	Jun 30, 2024
N/A	5.22%	3.3M	+1.1M (+34.20%)	Jun 30, 2026
VANGUARD PORTFOLIO MANAGEMENT LLC	5.22%	3.3M	+1.1M (+34.20%)	Jun 30, 2026

Holder	Ownership %	Shares Held	Change (Shares, %)	Report Date
iSHARES TRUST	9.29%	6.0M	+484,933 (+8.15%)	Jun 30, 2026
VANGUARD INDEX FUNDS	5.30%	3.4M	+1.2M (+35.01%)	Jun 30, 2026
SMALLCAP WORLD FUND INC	4.57%	2.9M	+2.9M (+100.00%)	Jun 30, 2026
VANGUARD WORLD FUND	2.08%	1.3M	+4,564 (+0.34%)	May 31, 2026
SPDR SERIES TRUST	1.37%	875,837	+85,763 (+9.79%)	Jun 30, 2026
INVESCO EXCHANGE-TRADED FUND TRUST	1.00%	641,198	-463,883 (-72.35%)	Apr 30, 2026
FIDELITY CONCORD STREET TRUST	0.77%	494,271	+1,586 (+0.32%)	May 31, 2026

Current Ownership Distribution

Institutions683.5M (76.95%)
Mutual Funds196.9M (22.17%)
Insiders7.7M (0.87%)
Other0 (0.00%)

Insider Transactions

0.87% (7.7M)
Current InsiderOwnership (%, shares)
0
Number of InsiderBuying (last 12 months)
$0.00
Amount of InsiderBuying (last 12 months)
8
Number of InsiderSelling (last 12 months)
$786.1M
Amount of InsiderSelling (last 12 months)

Insider Name & Title	Type	Date	Transaction Value	Shares	Share Price	Shares After Transactions
Wang David H See Remarks	Exempt	Sep 09, 2026	$0.00	70,000	$0.00	130,000
Wang David H See Remarks	Exempt	Sep 09, 2026	$70,000.00	70,000	$1.00	872,708
Wang David H See Remarks	Sell	Sep 09, 2026	$2.5M	33,493	$73.80	839,215
Wang David H See Remarks	Sell	Sep 09, 2026	$1.4M	18,934	$74.67	820,281
Wang David H See Remarks	Sell	Sep 09, 2026	$881,716.28	11,666	$75.58	808,615
Wang David H See Remarks	Sell	Sep 09, 2026	$368,841.11	4,807	$76.73	803,808
Wang David H See Remarks	Sell	Sep 09, 2026	$85,349.00	1,100	$77.59	802,708
Wang David H See Remarks	Exempt	Sep 08, 2026	$70,000.00	70,000	$1.00	872,708
Wang David H See Remarks	Sell	Sep 08, 2026	$364,979.97	4,803	$75.99	867,905
Wang David H See Remarks	Sell	Sep 08, 2026	$4.0M	51,374	$77.15	816,531
Wang David H See Remarks	Sell	Sep 08, 2026	$962,179.84	12,323	$78.08	804,208
Wang David H See Remarks	Sell	Sep 08, 2026	$117,855.00	1,500	$78.57	802,708
Wang David H See Remarks	Exempt	Sep 08, 2026	$0.00	70,000	$0.00	200,000
McKechnie Mark See Remarks	Exempt	Aug 20, 2026	$0.00	30,199	$0.00	31,250
McKechnie Mark See Remarks	Exempt	Aug 20, 2026	$0.00	25,000	$0.00	215,000
McKechnie Mark See Remarks	Exempt	Aug 20, 2026	$588,578.51	30,199	$19.49	31,099
McKechnie Mark See Remarks	Exempt	Aug 20, 2026	$347,250.00	25,000	$13.89	56,099
McKechnie Mark See Remarks	Sell	Aug 20, 2026	$1.0M	13,625	$76.34	42,474
McKechnie Mark See Remarks	Sell	Aug 20, 2026	$2.4M	30,365	$77.45	12,109
McKechnie Mark See Remarks	Sell	Aug 20, 2026	$873,069.01	11,209	$77.89	900
Dun Haiping	Exempt	Aug 18, 2026	$0.00	5,000	$0.00	45,000
Dun Haiping	Exempt	Aug 18, 2026	$28,000.00	5,000	$5.60	5,000
Dun Haiping	Sell	Aug 18, 2026	$96,348.00	1,200	$80.29	3,800
Dun Haiping	Sell	Aug 18, 2026	$276,454.00	3,400	$81.31	400
Dun Haiping	Sell	Aug 18, 2026	$32,868.00	400	$82.17	0
Wang David H See Remarks	Award	May 13, 2026	$0.00	6,208	$0.00	6,208
Wang David H See Remarks	Exempt	Mar 12, 2026	$0.00	50,000	$0.00	370,002
Wang David H See Remarks	Exempt	Mar 12, 2026	$50,000.00	50,000	$1.00	852,708
Wang David H See Remarks	Sell	Mar 12, 2026	$474,400.12	10,561	$44.92	842,147
Wang David H See Remarks	Sell	Mar 12, 2026	$1.8M	38,737	$45.74	803,410