SEI Investments
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SEI Investments’s ACM Research ACMR Stock Holding History

SEI Investments’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 		$5.12M Sell
40,313
-44,692
-53% -$3.16M ﹤0.01% 1498
2026
Q1 		$3.34M Buy
85,005
+26,560
+45% +$1.41M ﹤0.01% 1758
2025
Q4 		$2.31M Buy
58,445
+36,359
+165% +$1.35M ﹤0.01% 1775
2025
Q3 		$864K Sell
22,086
-5,921
-21% -$176K ﹤0.01% 2018
2025
Q2 		$725K Sell
28,007
-21,011
-43% -$472K ﹤0.01% 2054
2025
Q1 		$1.14M Buy
+49,018
New +$1.12M ﹤0.01% 1857
2024
Q3 		– Sell
-21,736
Closed -$501K – 2677
2024
Q2 		$501K Buy
21,736
+1,358
+7% +$34.4K ﹤0.01% 2148
2024
Q1 		$593K Sell
20,378
-766
-4% -$17.5K ﹤0.01% 2057
2023
Q4 		$413K Sell
21,144
-64,457
-75% -$1.13M ﹤0.01% 2187
2023
Q3 		$1.55M Buy
85,601
+47,536
+125% +$707K ﹤0.01% 1705
2023
Q2 		$498K Hold
38,065
– – ﹤0.01% 2133
2023
Q1 		$445K Sell
38,065
-10,646
-22% -$123K ﹤0.01% 2176
2022
Q4 		$376K Buy
48,711
+22,300
+84% +$189K ﹤0.01% 2128
2022
Q3 		$329K Buy
+26,411
New +$429K ﹤0.01% 2268
2020
Q3 		– Sell
-22,542
Closed -$469K – 2394
2020
Q2 		$469K Sell
22,542
-19,080
-46% -$313K ﹤0.01% 1880
2020
Q1 		$411K Buy
+41,622
New +$449K ﹤0.01% 1802

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

SEI Investments's ACMR Position: Q2 2026 in Review

SEI Investments reduced its ACM Research (ACMR) stake by 53% in Q2 2026, selling an estimated $3.16M and leaving 40,313 shares worth $5.12M. The position accounts for ﹤0.01% of the portfolio, ranked #1498.

SEI Investments first reported a position in ACMR in Q1 2020 and has held it in 16 quarters since. 376 funds tracked by Wall St. Rank hold ACMR as of Q2 2026.

  • SEI Investments held 40,313 shares of ACM Research worth $5.12M as of Q2 2026.
  • SEI Investments sold 44,692 ACM Research shares in Q2 2026, an estimated $3.16M.
  • ACM Research made up ﹤0.01% of SEI Investments's portfolio in Q2 2026, its #1498 holding.
  • SEI Investments first reported a position in ACM Research in Q1 2020 and has held it in 16 quarters since.
  • 376 funds tracked by Wall St. Rank held ACM Research as of Q2 2026.

Based on SEI Investments's 13F filing for Q2 2026, filed 14 Aug 2026.