Simplex Trading
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Simplex Trading’s ACM Research ACMR Stock Holding History

Simplex Trading’s Portfolio ACMR Stock Details ACMR Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q2 		$5.62M Buy
44,316
+19,852
+81% +$1.4M ﹤0.01% 1127
2026
Q1 		$963K Sell
24,464
-86,488
-78% -$4.59M ﹤0.01% 2536
2025
Q4 		$4.38M Buy
110,952
+35,934
+48% +$1.34M ﹤0.01% 1378
2025
Q3 		$2.94M Sell
75,018
-20,692
-22% -$614K ﹤0.01% 1944
2025
Q2 		$2.48M Sell
95,710
-14,418
-13% -$324K ﹤0.01% 1918
2025
Q1 		$2.57M Sell
110,128
-31,308
-22% -$715K ﹤0.01% 1804
2024
Q4 		$2.13M Buy
141,436
+106,610
+306% +$1.93M ﹤0.01% 2133
2024
Q3 		$706K Sell
34,826
-15,439
-31% -$296K ﹤0.01% 3245
2024
Q2 		$1.16M Buy
+50,265
New +$1.27M ﹤0.01% 2769
2024
Q1 		– Sell
-67,124
Closed -$1.54M – 8717
2023
Q4 		$1.31M Buy
+67,124
New +$1.17M ﹤0.01% 2757
2023
Q2 		– Sell
-57,465
Closed -$605K – 8833
2023
Q1 		$672K Buy
57,465
+50,003
+670% +$578K ﹤0.01% 2971
2022
Q4 		$57K Sell
7,462
-28,253
-79% -$239K ﹤0.01% 5696
2022
Q3 		$445K Buy
35,715
+22,357
+167% +$364K ﹤0.01% 3594
2022
Q2 		$224K Sell
13,358
-68,283
-84% -$1.05M ﹤0.01% 4467
2022
Q1 		$1.69M Buy
81,641
+77,576
+1,908% +$1.95M ﹤0.01% 2284
2021
Q4 		$115K Buy
+4,065
New +$129K ﹤0.01% 6023
2021
Q2 		– Sell
-31,440
Closed -$864K – 9924
2021
Q1 		$846K Buy
+31,440
New +$1.04M ﹤0.01% 2610
2020
Q4 		– Sell
-90,309
Closed -$2.31M – 8238
2020
Q3 		$2.08M Buy
90,309
+76,062
+534% +$2.16M ﹤0.01% 1496
2020
Q2 		$296K Sell
14,247
-987
-6% -$16.2K ﹤0.01% 3541
2020
Q1 		$150K Buy
+15,234
New +$164K ﹤0.01% 3917

Other funds holding ACMR

BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
Capital World Investors
Capital World Investors Los Angeles, California $846B AUM 46.74% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return
Invesco
Invesco Atlanta, Georgia $1.26T AUM 61.52% 1-Year Est. Return
VARA
Value Aligned Research Advisors Princeton, New Jersey $40.1B AUM 376.19% 1-Year Est. Return
WA
WFM Asia Road Town, Tortola, British Virgin Islands $663M AUM 15.46% 1-Year Est. Return
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $552B AUM 44.19% 1-Year Est. Return

Simplex Trading's ACMR Position: Q2 2026 in Review

Simplex Trading increased its ACM Research (ACMR) stake by 81% in Q2 2026, buying an estimated $1.4M and bringing the position to 44,316 shares worth $5.62M. The position accounts for ﹤0.01% of the portfolio, ranked #1127.

Simplex Trading first reported a position in ACMR in Q1 2020 and has held it in 20 quarters since. 376 funds tracked by Wall St. Rank hold ACMR as of Q2 2026.

  • Simplex Trading held 44,316 shares of ACM Research worth $5.62M as of Q2 2026.
  • Simplex Trading bought 19,852 ACM Research shares in Q2 2026, an estimated $1.4M.
  • ACM Research made up ﹤0.01% of Simplex Trading's portfolio in Q2 2026, its #1127 holding.
  • Simplex Trading first reported a position in ACM Research in Q1 2020 and has held it in 20 quarters since.
  • 376 funds tracked by Wall St. Rank held ACM Research as of Q2 2026.

Based on Simplex Trading's 13F filing for Q2 2026, filed 12 Aug 2026.