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Thompson Siegel & Walmsley’s ACM Research ACMR Stock Holding History

Thompson Siegel & Walmsley’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 		$13.4M Buy
105,790
+4,690
+5% +$332K 0.24% 110
2026
Q1 		$3.98M Sell
101,100
-87,400
-46% -$4.64M 0.07% 253
2025
Q4 		$7.44M Buy
188,500
+78,800
+72% +$2.94M 0.12% 170
2025
Q3 		$4.29M Buy
109,700
+31,700
+41% +$941K 0.07% 237
2025
Q2 		$2.02M Buy
78,000
+24,100
+45% +$542K 0.03% 264
2025
Q1 		$1.26M Buy
+53,900
New +$1.23M 0.02% 272

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 $3.38T AUM 44.17% 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

Thompson Siegel & Walmsley's ACMR Position: Q2 2026 in Review

Thompson Siegel & Walmsley increased its ACM Research (ACMR) stake by 4.6% in Q2 2026, buying an estimated $332K and bringing the position to 105,790 shares worth $13.4M. The position accounts for 0.24% of the portfolio, ranked #110.

Thompson Siegel & Walmsley first reported a position in ACMR in Q1 2025 and has held it in 6 quarters since. 376 funds tracked by Wall St. Rank hold ACMR as of Q2 2026.

  • Thompson Siegel & Walmsley held 105,790 shares of ACM Research worth $13.4M as of Q2 2026.
  • Thompson Siegel & Walmsley bought 4,690 ACM Research shares in Q2 2026, an estimated $332K.
  • ACM Research made up 0.24% of Thompson Siegel & Walmsley's portfolio in Q2 2026, its #110 holding.
  • Thompson Siegel & Walmsley first reported a position in ACM Research in Q1 2025 and has held it in 6 quarters since.
  • 376 funds tracked by Wall St. Rank held ACM Research as of Q2 2026.

Based on Thompson Siegel & Walmsley's 13F filing for Q2 2026, filed 11 Aug 2026.