Wellington Management Group
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Wellington Management Group’s ACM Research ACMR Stock Holding History

Wellington Management Group’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 		$22.2M Buy
+174,987
New +$12.4M ﹤0.01% 1033
2021
Q4 		– Sell
-77,493
Closed -$2.84M – 2168
2021
Q3 		$2.84M Sell
77,493
-1,069,353
-93% -$32.7M ﹤0.01% 1632
2021
Q2 		$39.1M Sell
1,146,846
-765,162
-40% -$21M 0.01% 903
2021
Q1 		$51.5M Buy
1,912,008
+1,232,319
+181% +$40.7M 0.01% 784
2020
Q4 		$18.4M Buy
679,689
+28,515
+4% +$730K ﹤0.01% 1057
2020
Q3 		$15M Sell
651,174
-604,593
-48% -$17.2M ﹤0.01% 1009
2020
Q2 		$26.1M Buy
1,255,767
+1,205,376
+2,392% +$19.8M 0.01% 867
2020
Q1 		$497K Buy
+50,391
New +$543K ﹤0.01% 1698

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

Wellington Management Group's ACMR Position: Q2 2026 in Review

Wellington Management Group opened a new position in ACM Research (ACMR) in Q2 2026: 174,987 shares worth $22.2M. The stake represents ﹤0.01% of the portfolio and ranks #1033 among its holdings. This is a return to the name: Wellington Management Group previously reported a position in ACMR as recently as Q3 2021.

Wellington Management Group first reported a position in ACMR in Q1 2020 and has held it in 8 quarters since. The position peaked at $51.5M in Q1 2021. 375 funds tracked by Wall St. Rank hold ACMR as of Q2 2026.

  • Wellington Management Group held 174,987 shares of ACM Research worth $22.2M as of Q2 2026.
  • ACM Research was a new Wellington Management Group position in Q2 2026.
  • ACM Research made up ﹤0.01% of Wellington Management Group's portfolio in Q2 2026, its #1033 holding.
  • Wellington Management Group first reported a position in ACM Research in Q1 2020 and has held it in 8 quarters since.
  • Wellington Management Group's ACM Research position peaked at $51.5M in Q1 2021.
  • 375 funds tracked by Wall St. Rank held ACM Research as of Q2 2026.

Based on Wellington Management Group's 13F filing for Q2 2026, filed 14 Aug 2026.