Dun Haiping sold ACMR
May 19, 2026 · Form 4 insider transaction
Dun Haiping sold 500 shares of ACM Research, Inc. at $65.09 per share, a transaction worth $32.5K. The trade was recorded as open-market sale under a pre-scheduled Rule 10b5-1 plan and disclosed on an SEC Form 4, filed 2 days after the transaction.
Direction
Disposed (sell-side)
Shares
500
Price
$65.09
Total value
$32.5K
InsiderDun Haiping
RoleDirector
CompanyACM Research, Inc. (ACMR)
SecurityClass A Common Stock
Transaction codeS: Open-market sale
Transaction dateMay 19, 2026
Filing dateMay 21, 2026
Shares owned after3,167
OwnershipDirect
10b5-1 planYes
AmendedNo
Footnotes
The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on August 13, 2025.; The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $64.78 to $65.77, inclusive.