FENG LISA

PrivateCIK: 1779777
Location

FREMONT, CA

FENG LISA (See Remarks) sold 37.5% of their position (30K shares) of ACM RESEARCH, INC. on the open market

Open‑market sale worth $1.44M — a major position exit. Review remaining holdings and any 10b5‑1 plan disclosures.

S · 4 sales
InsiderFENG LISACIK 1779777
IssuerACM RESEARCH, INC.CIK 1680062
Officer· See Remarks
Since Jun 2019
-30K
Net shares
Net seller
$1.44M
Total sold
4
Open market trades
0B · 4S
8
Total transactions
30K acquired · 60K disposed
Non-Derivative Transactions6

Class A Common Stock

Direct
M · Option Exercise

Shares

+15K

Price / share

$4.55

Trade value

$68.25K

% of position

30.0%
3/5/2026
50K65K

Class A Common Stock

Direct
S · Sale

Shares

8.05K

Price / share

$49.81

Trade value

$400.97K

% of position

12.4%
3/5/2026
65K56.95K

Class A Common Stock

Direct
S · Sale

Shares

6.95K

Price / share

$50.24

Trade value

$349.17K

% of position

12.2%
3/5/2026
56.95K50K

Class A Common Stock

Direct
M · Option Exercise

Shares

+15K

Price / share

$4.55

Trade value

$68.25K

% of position

30.0%
3/6/2026
50K65K

Class A Common Stock

Direct
S · Sale

Shares

14.80K

Price / share

$46.07

Trade value

$681.84K

% of position

22.8%
3/6/2026
65K50.20K

Class A Common Stock

Direct
S · Sale

Shares

200.00

Price / share

$46.58

Trade value

$9.32K

% of position

0.4%
3/6/2026
50.20K50K
Total

Net shares

+0.00

Net value

-$1.30M

Derivative Transactions2

Stock Option

Direct
M · Option Exercise
Converts to

Class A Common Stock

15K shares

Shares

15K

Strike price

4.55

Held after

0.00

Exercisable

3/5/2026

Stock Option

Direct
M · Option Exercise
Converts to

Class A Common Stock

15K shares

Shares

15K

Strike price

4.55

Held after

0.00

Exercisable

3/6/2026
FENG LISA — Insider Transaction (Form 4) Filed Mar 9, 2026 | Finecho