RhumbLine Advisers
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RhumbLine Advisers’s ACM Research ACMR Stock Holding History

RhumbLine Advisers’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
Q1 		$5.59M Buy
142,011
+3,863
+3% +$205K ﹤0.01% 1349
2025
Q4 		$5.45M Sell
138,148
-9,646
-7% -$359K ﹤0.01% 1353
2025
Q3 		$5.78M Buy
147,794
+66,329
+81% +$1.97M ﹤0.01% 1352
2025
Q2 		$2.11M Buy
81,465
+5,049
+7% +$114K ﹤0.01% 1856
2025
Q1 		$1.78M Buy
76,416
+2,677
+4% +$61.1K ﹤0.01% 1865
2024
Q4 		$1.11M Buy
73,739
+589
+0.8% +$10.6K ﹤0.01% 2202
2024
Q3 		$1.48M Sell
73,150
-3,304
-4% -$63.3K ﹤0.01% 2057
2024
Q2 		$1.76M Sell
76,454
-810
-1% -$20.5K ﹤0.01% 1951
2024
Q1 		$2.25M Buy
77,264
+2,080
+3% +$47.6K ﹤0.01% 1854
2023
Q4 		$1.47M Buy
75,184
+803
+1% +$14K ﹤0.01% 2069
2023
Q3 		$1.35M Sell
74,381
-155
-0.2% -$2.31K ﹤0.01% 2054
2023
Q2 		$975K Sell
74,536
-285
-0.4% -$3K ﹤0.01% 2303
2023
Q1 		$875K Buy
74,821
+4,511
+6% +$52.2K ﹤0.01% 2182
2022
Q4 		$542K Buy
70,310
+126
+0.2% +$1.07K ﹤0.01% 2428
2022
Q3 		$874K Buy
70,184
+4,911
+8% +$79.9K ﹤0.01% 2210
2022
Q2 		$1.1M Buy
+65,273
New +$1.01M ﹤0.01% 2092

Other funds holding ACMR

BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
VPM
Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
WCM Investment Management
WCM Investment Management Laguna Beach, California $43.8B AUM 42.28% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return
Morgan Stanley
Morgan Stanley New York $1.66T AUM 25.57% 1-Year Est. Return
Janus Henderson Group
Janus Henderson Group London, United Kingdom $209B AUM 37.72% 1-Year Est. Return
VARA
Value Aligned Research Advisors Princeton, New Jersey $20.7B AUM 292.88% 1-Year Est. Return
PCP
Polunin Capital Partners London, United Kingdom $407M AUM 55.12% 1-Year Est. Return

RhumbLine Advisers's ACMR Position: Q1 2026 in Review

RhumbLine Advisers increased its ACM Research (ACMR) stake by 2.8% in Q1 2026, buying an estimated $205K and bringing the position to 142,011 shares worth $5.59M. The position accounts for ﹤0.01% of the portfolio, ranked #1349.

RhumbLine Advisers first reported a position in ACMR in Q2 2022 and has held it in 16 quarters since. The position peaked at $5.78M in Q3 2025. 300 funds tracked by Wall St. Rank hold ACMR as of Q1 2026.

  • RhumbLine Advisers held 142,011 shares of ACM Research worth $5.59M as of Q1 2026.
  • RhumbLine Advisers bought 3,863 ACM Research shares in Q1 2026, an estimated $205K.
  • ACM Research made up ﹤0.01% of RhumbLine Advisers's portfolio in Q1 2026, its #1349 holding.
  • RhumbLine Advisers first reported a position in ACM Research in Q2 2022 and has held it in 16 quarters since.
  • RhumbLine Advisers's ACM Research position peaked at $5.78M in Q3 2025.
  • 300 funds tracked by Wall St. Rank held ACM Research as of Q1 2026.

Based on RhumbLine Advisers's 13F filing for Q1 2026, filed 12 May 2026.