Jim Simons
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Jim Simons’s ACM Research ACMR Stock Holding History

Jim Simons’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 		$29.2M Buy
229,800
+107,200
+87% +$7.58M 0.04% 542
2026
Q1 		$4.82M Sell
122,600
-1,839
-1% -$97.6K 0.01% 1406
2025
Q4 		$4.91M Sell
124,439
-175,486
-59% -$6.54M 0.01% 1313
2025
Q3 		$11.7M Buy
299,925
+262,925
+711% +$7.81M 0.02% 1014
2025
Q2 		$958K Buy
+37,000
New +$832K ﹤0.01% 2544
2024
Q2 		– Sell
-145,800
Closed -$4.25M – 3447
2024
Q1 		$4.25M Buy
+145,800
New +$3.34M 0.01% 1519
2023
Q1 		– Sell
-111,600
Closed -$860K – 3926
2022
Q4 		$860K Buy
+111,600
New +$946K ﹤0.01% 2620
2022
Q2 		– Sell
-95,800
Closed -$1.98M – 4180
2022
Q1 		$1.98M Sell
95,800
-157,100
-62% -$3.95M ﹤0.01% 2239
2021
Q4 		$7.19M Buy
+252,900
New +$8M 0.01% 1268
2019
Q4 		– Sell
-148,800
Closed -$687K – 3474
2019
Q3 		$687K Sell
148,800
-2,400
-2% -$12.6K ﹤0.01% 2740
2019
Q2 		$787K Buy
+151,200
New +$876K ﹤0.01% 2802

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
WFM Asia
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

Jim Simons's ACMR Position: Q2 2026 in Review

Jim Simons increased its ACM Research (ACMR) stake by 87% in Q2 2026, buying an estimated $7.58M and bringing the position to 229,800 shares worth $29.2M. The position accounts for 0.04% of the portfolio, ranked #542.

Jim Simons first reported a position in ACMR in Q2 2019 and has held it in 11 quarters since. 376 funds tracked by Wall St. Rank hold ACMR as of Q2 2026.

  • Jim Simons held 229,800 shares of ACM Research worth $29.2M as of Q2 2026.
  • Jim Simons bought 107,200 ACM Research shares in Q2 2026, an estimated $7.58M.
  • ACM Research made up 0.04% of Jim Simons's portfolio in Q2 2026, its #542 holding.
  • Jim Simons first reported a position in ACM Research in Q2 2019 and has held it in 11 quarters since.
  • 376 funds tracked by Wall St. Rank held ACM Research as of Q2 2026.

Based on Renaissance Technologies's 13F filing for Q2 2026, filed 13 Aug 2026.