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
Q1 		$1.03M Sell
26,100
-88,400
-77% -$4.69M ﹤0.01% 2473
2025
Q4 		$4.52M Sell
114,500
-9,300
-8% -$347K ﹤0.01% 1351
2025
Q3 		$4.84M Sell
123,800
-40,300
-25% -$1.2M ﹤0.01% 1488
2025
Q2 		$4.25M Sell
164,100
-48,700
-23% -$1.1M ﹤0.01% 1491
2025
Q1 		$4.97M Sell
212,800
-61,000
-22% -$1.39M ﹤0.01% 1309
2024
Q4 		$4.13M Buy
273,800
+226,300
+476% +$4.09M ﹤0.01% 1618
2024
Q3 		$964K Sell
47,500
-109,600
-70% -$2.1M ﹤0.01% 2948
2024
Q2 		$3.62M Buy
157,100
+89,500
+132% +$2.26M ﹤0.01% 1665
2024
Q1 		$1.97M Sell
67,600
-42,100
-38% -$964K ﹤0.01% 2411
2023
Q4 		$2.14M Buy
109,700
+33,500
+44% +$586K ﹤0.01% 2299
2023
Q3 		$1.38M Buy
76,200
+58,200
+323% +$865K ﹤0.01% 2379
2023
Q2 		$235K Sell
18,000
-44,300
-71% -$467K ﹤0.01% 4110
2023
Q1 		$728K Buy
62,300
+51,200
+461% +$592K ﹤0.01% 2890
2022
Q4 		$85K Buy
11,100
+9,200
+484% +$78K ﹤0.01% 5266
2022
Q3 		$23K Sell
1,900
-18,400
-91% -$299K ﹤0.01% 7354
2022
Q2 		$341K Sell
20,300
-120,600
-86% -$1.86M ﹤0.01% 3931
2022
Q1 		$2.92M Buy
140,900
+124,700
+770% +$3.14M ﹤0.01% 1730
2021
Q4 		$460K Buy
16,200
+6,000
+59% +$190K ﹤0.01% 3931
2021
Q3 		$346K Hold
10,200
– – ﹤0.01% 4680
2021
Q2 		$347K Buy
10,200
+8,724
+591% +$240K ﹤0.01% 4732
2021
Q1 		$3.97M Buy
1,476
+1,344
+1,018% +$44.4K 0.01% 1004
2020
Q4 		$357K Sell
132
-3,153
-96% -$80.7K ﹤0.01% 3852
2020
Q3 		$7.57M Sell
3,285
-387
-11% -$11K 0.01% 645
2020
Q2 		$7.63M Buy
3,672
+2,832
+337% +$46.5K 0.01% 629
2020
Q1 		$829K Buy
+840
New +$9.06K ﹤0.01% 2053

Other funds holding ACMR

BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
VPM
Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
WCM Investment Management
WCM Investment Management Laguna Beach, California $43.8B AUM 42.28% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return
Morgan Stanley
Morgan Stanley New York $1.66T AUM 25.57% 1-Year Est. Return
Janus Henderson Group
Janus Henderson Group London, United Kingdom $209B AUM 37.72% 1-Year Est. Return
VARA
Value Aligned Research Advisors Princeton, New Jersey $20.7B AUM 292.88% 1-Year Est. Return
PCP
Polunin Capital Partners London, United Kingdom $407M AUM 55.12% 1-Year Est. Return

Simplex Trading's ACMR Position: Q1 2026 in Review

Simplex Trading reduced its ACM Research (ACMR) stake by 78% in Q1 2026, selling an estimated $4.59M and leaving 24,464 shares worth $963K. The position accounts for ﹤0.01% of the portfolio, ranked #2536.

Simplex Trading first reported a position in ACMR in Q1 2020 and has held it in 19 quarters since. The position peaked at $4.38M in Q4 2025. 300 funds tracked by Wall St. Rank hold ACMR as of Q1 2026.

  • Simplex Trading held 24,464 shares of ACM Research worth $963K as of Q1 2026.
  • Simplex Trading sold 86,488 ACM Research shares in Q1 2026, an estimated $4.59M.
  • ACM Research made up ﹤0.01% of Simplex Trading's portfolio in Q1 2026, its #2536 holding.
  • Simplex Trading first reported a position in ACM Research in Q1 2020 and has held it in 19 quarters since.
  • Simplex Trading's ACM Research position peaked at $4.38M in Q4 2025.
  • 300 funds tracked by Wall St. Rank held ACM Research as of Q1 2026.

Based on Simplex Trading's 13F filing for Q1 2026, filed 14 May 2026.