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Livermore
Livermore
ZHEN

Simplex Trading, LLC

SEC CIK
0001488542
Latest filing
Aug 12, 2026

ACMR holding history

ACM Research, Inc. in every 13F filed by Simplex Trading, LLC, including the quarters it was sold out or no filing was made. Changes compare share counts with the previous calendar quarter.

ACMR overviewAll 13F holders of ACMRFull Q2 2026 holdings

Shares (Q2 2026)
44,316
Value
$5.62M
% of portfolio
0.1%
Quarters held
17
Since Q1 2021
Holdings of ACMR by Simplex Trading, LLC, by quarter
QuarterSharesValue% of portfolioShare changeActionAll holders
Q2 202644,316$5.62M0.1%+19,852+81.1%AddedHolders
Q1 202624,464$962.7K<0.1%−86,488−78.0%ReducedHolders
Q4 2025110,952$4.38M0.1%+35,934+47.9%AddedHolders
Q3 202575,018$2.94M0.1%−20,692−21.6%ReducedHolders
Q2 202595,710$2.48M0.1%−14,418−13.1%ReducedHolders
Q1 2025110,128$2.57M0.1%−31,308−22.1%ReducedHolders
Q4 2024141,436$2.13M0.1%+106,610+306.1%AddedHolders
Q3 202434,826$706.0K<0.1%−15,439−30.7%ReducedHolders
Q2 202450,265$1.16M<0.1%+50,265NewHolders
Q1 20240$00.0%−67,124−100.0%Sold outHolders
Q4 202367,124$1.31M<0.1%+67,124NewHolders
Q2 20230$00.0%−57,465−100.0%Sold outHolders
Q1 202357,465$672.0K<0.1%+50,003+670.1%AddedHolders
Q4 20227,462$57.0K<0.1%−28,253−79.1%ReducedHolders
Q3 202235,715$445.0K<0.1%+22,357+167.4%AddedHolders
Q2 202213,358$224.0K<0.1%−68,283−83.6%ReducedHolders
Q1 202281,641$1.69M0.1%+77,576+1,908.4%AddedConverted for a 3-for-1 splitHolders
Q4 20211,355$115.0K<0.1%+1,355NewHolders
Q2 20210$00.0%−10,480−100.0%Sold outHolders
Q1 202110,480$846.0K<0.1%––Holders

Livermore's 13F data starts with Q1 2021, so Q1 2021 has no change from the previous quarter.