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PDT Partners’s ACM Research ACMR Stock Holding History

PDT Partners’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 		– Sell
-6,241
Closed -$246K – 529
2025
Q4 		$246K Sell
6,241
-3,700
-37% -$138K 0.02% 496
2025
Q3 		$389K Sell
9,941
-1
-0% -$30 0.02% 478
2025
Q2 		$257K Sell
9,942
-111,660
-92% -$2.51M 0.01% 616
2025
Q1 		$2.84M Buy
121,602
+13,572
+13% +$310K 0.2% 176
2024
Q4 		$1.63M Buy
+108,030
New +$1.95M 0.14% 249
2024
Q2 		– Sell
-7,157
Closed -$209K – 655
2024
Q1 		$209K Sell
7,157
-71,184
-91% -$1.63M 0.02% 572
2023
Q4 		$1.53M Sell
78,341
-619
-0.8% -$10.8K 0.17% 210
2023
Q3 		$1.43M Hold
78,960
– – 0.18% 188
2023
Q2 		$1.03M Sell
78,960
-22,379
-22% -$236K 0.14% 244
2023
Q1 		$1.19M Sell
101,339
-25,506
-20% -$295K 0.16% 226
2022
Q4 		$978K Buy
126,845
+98,036
+340% +$831K 0.16% 229
2022
Q3 		$359K Buy
+28,809
New +$468K 0.05% 530
2020
Q1 		– Sell
-31,500
Closed -$194K – 640
2019
Q4 		$194K Buy
+31,500
New +$155K 0.01% 652

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

PDT Partners's ACMR Position: Q1 2026 in Review

PDT Partners sold out of ACM Research (ACMR) in Q1 2026, closing a stake of 6,241 shares — an estimated $246K sold.

PDT Partners first reported a position in ACMR in Q4 2019 and held it in 13 quarters. The position peaked at $2.84M in Q1 2025. 300 funds tracked by Wall St. Rank hold ACMR as of Q1 2026.

  • PDT Partners reported no remaining ACM Research position as of Q1 2026 after selling out during the quarter.
  • PDT Partners sold 6,241 ACM Research shares in Q1 2026, an estimated $246K.
  • PDT Partners first reported a position in ACM Research in Q4 2019 and held it in 13 quarters.
  • PDT Partners's ACM Research position peaked at $2.84M in Q1 2025.
  • 300 funds tracked by Wall St. Rank held ACM Research as of Q1 2026.

Based on PDT Partners's 13F filing for Q1 2026, filed 15 May 2026.