DUN HAIPING sold 5K shares of ACM RESEARCH, INC. on the open market
Open‑market sale worth $405.7K. Review remaining holdings and any 10b5‑1 plan disclosures.
S · 3 sales
Filed: 8/20/2026ACC: 0001140361-26-033892
-5K
Net shares
Net seller
$405.7K
Total sold
3
Open market trades
0B · 3S
5
Total transactions
5K acquired · 10K disposed
Non-Derivative Transactions4
Class A Common Stock
Direct
Shares
+5K
Price / share
$5.60
Trade value
$28K
% of position
New position
8/18/2026
0.00→5K
Class A Common Stock
Direct
Shares
−1.20K
Price / share
$80.29
Trade value
$96.35K
% of position
24.0%
8/18/2026
5K→3.80K
Class A Common Stock
Direct
Shares
−3.40K
Price / share
$81.31
Trade value
$276.45K
% of position
89.5%
8/18/2026
3.80K→400.00
Class A Common Stock
Direct
Shares
−400.00
Price / share
$82.17
Trade value
$32.87K
% of position
New position
8/18/2026
400.00→0.00
Total
Net shares
+0.00
Net value
-$377.67K
| Security | Date | Type | Shares | Price / Share | Trade Value | % of Position | Held Before | Held After |
|---|---|---|---|---|---|---|---|---|
| Class A Common Stock Direct | 8/18/2026 | M · Option Exercise | +5K | $5.60 | $28K | New position | 0.00 | 5K |
| Class A Common Stock Direct | 8/18/2026 | S · Sale | −1.20K | $80.29 | $96.35K | 24.0% | 5K | 3.80K |
| Class A Common Stock Direct | 8/18/2026 | S · Sale | −3.40K | $81.31 | $276.45K | 89.5% | 3.80K | 400.00 |
| Class A Common Stock Direct | 8/18/2026 | S · Sale | −400.00 | $82.17 | $32.87K | New position | 400.00 | 0.00 |
| Total | +0.00 | -$377.67K | ||||||
Derivative Transactions1
Stock Option
Direct
Converts to
Class A Common Stock
5K shares
Shares
−5K
Strike price
5.6
Held after
45K
Exercisable
—
8/18/2026
| Security | Converts To | Date | Type | Shares | Strike Price | Exercisable | Held After |
|---|---|---|---|---|---|---|---|
| Stock Option Direct | Class A Common Stock5K shares | 8/18/2026 | M · Option Exercise | −5K | 5.6 | — | 45K |
Non-Derivative Holdings (Post-Transaction)2
Class A Common Stock
IndirectShares owned100K
Class A Common Stock
IndirectShares owned755.09K
Total
855.09K indirect855.09K
| Security Title | Shares Owned | Ownership Type |
|---|---|---|
| Class A Common Stock | 100K | Indirect |
| Class A Common Stock | 755.09K | Indirect |
| Total | 855.09K | 855.09K indirect |
Derivative Holdings (Post-Transaction)0
No derivative holdings reported