Grantham, Mayo, Van Otterloo & Co (GMO)
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Grantham, Mayo, Van Otterloo & Co (GMO)’s ACM Research ACMR Stock Holding History

Grantham, Mayo, Van Otterloo & Co (GMO)’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 		$471K Sell
3,713
-6,468
-64% -$457K ﹤0.01% 571
2026
Q1 		$401K Sell
10,181
-10,106
-50% -$536K ﹤0.01% 566
2025
Q4 		$800K Buy
20,287
+1,686
+9% +$62.8K ﹤0.01% 538
2025
Q3 		$728K Buy
+18,601
New +$552K ﹤0.01% 503

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

Grantham, Mayo, Van Otterloo & Co (GMO)'s ACMR Position: Q2 2026 in Review

Grantham, Mayo, Van Otterloo & Co (GMO) reduced its ACM Research (ACMR) stake by 64% in Q2 2026, selling an estimated $457K and leaving 3,713 shares worth $471K. The position accounts for ﹤0.01% of the portfolio, ranked #571.

Grantham, Mayo, Van Otterloo & Co (GMO) first reported a position in ACMR in Q3 2025 and has held it in 4 quarters since. The position peaked at $800K in Q4 2025. 376 funds tracked by Wall St. Rank hold ACMR as of Q2 2026.

  • Grantham, Mayo, Van Otterloo & Co (GMO) held 3,713 shares of ACM Research worth $471K as of Q2 2026.
  • Grantham, Mayo, Van Otterloo & Co (GMO) sold 6,468 ACM Research shares in Q2 2026, an estimated $457K.
  • ACM Research made up ﹤0.01% of Grantham, Mayo, Van Otterloo & Co (GMO)'s portfolio in Q2 2026, its #571 holding.
  • Grantham, Mayo, Van Otterloo & Co (GMO) first reported a position in ACM Research in Q3 2025 and has held it in 4 quarters since.
  • Grantham, Mayo, Van Otterloo & Co (GMO)'s ACM Research position peaked at $800K in Q4 2025.
  • 376 funds tracked by Wall St. Rank held ACM Research as of Q2 2026.

Based on Grantham, Mayo, Van Otterloo & Co (GMO)'s 13F filing for Q2 2026, filed 13 Aug 2026.