Janus Henderson Group
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Janus Henderson Group’s ACM Research ACMR Stock Holding History

Janus Henderson 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
Q1 		$42.7M Buy
1,085,634
+2,652
+0.2% +$141K 0.02% 445
2025
Q4 		$42.7M Buy
1,082,982
+1,011,088
+1,406% +$37.7M 0.02% 442
2025
Q3 		$2.81M Sell
71,894
-7,496
-9% -$223K ﹤0.01% 1166
2025
Q2 		$2.06M Sell
79,390
-41,518
-34% -$934K ﹤0.01% 1274
2025
Q1 		$2.98M Sell
120,908
-31,097
-20% -$710K ﹤0.01% 1085
2024
Q4 		$2.3M Buy
152,005
+34,880
+30% +$630K ﹤0.01% 1246
2024
Q3 		$2.38M Buy
117,125
+2,832
+2% +$54.3K ﹤0.01% 1224
2024
Q2 		$2.64M Sell
114,293
-13,226
-10% -$335K ﹤0.01% 1126
2024
Q1 		$3.72M Buy
127,519
+7,713
+6% +$177K ﹤0.01% 995
2023
Q4 		$2.34M Buy
119,806
+36,004
+43% +$630K ﹤0.01% 1156
2023
Q3 		$1.52M Buy
83,802
+1,077
+1% +$16K ﹤0.01% 1329
2023
Q2 		$1.08M Buy
82,725
+14,446
+21% +$152K ﹤0.01% 1574
2023
Q1 		$799K Buy
68,279
+27,283
+67% +$316K ﹤0.01% 1752
2022
Q4 		$316K Sell
40,996
-48,094
-54% -$408K ﹤0.01% 1949
2022
Q3 		$1.11M Buy
89,090
+48,569
+120% +$790K ﹤0.01% 1591
2022
Q2 		$682K Sell
40,521
-4,501
-10% -$69.3K ﹤0.01% 1567
2022
Q1 		$932K Buy
45,022
+157
+0.3% +$3.95K ﹤0.01% 1554
2021
Q4 		$1.27M Buy
44,865
+8,364
+23% +$264K ﹤0.01% 1412
2021
Q3 		$1.34M Sell
36,501
-24,114
-40% -$738K ﹤0.01% 1322
2021
Q2 		$2.06M Sell
60,615
-2,946
-5% -$80.9K ﹤0.01% 1232
2021
Q1 		$1.71M Sell
63,561
-3,309
-5% -$109K ﹤0.01% 1204
2020
Q4 		$1.81M Buy
66,870
+12,285
+23% +$314K ﹤0.01% 1135
2020
Q3 		$1.26M Sell
54,585
-24,852
-31% -$706K ﹤0.01% 1120
2020
Q2 		$1.65M Buy
79,437
+43,893
+123% +$720K ﹤0.01% 1055
2020
Q1 		$351K Buy
35,544
+249
+0.7% +$2.68K ﹤0.01% 1212
2019
Q4 		$217K Buy
+35,295
New +$174K ﹤0.01% 1386

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
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
Invesco
Invesco Atlanta, Georgia $1.02T AUM 30.18% 1-Year Est. Return

Janus Henderson Group's ACMR Position: Q1 2026 in Review

Janus Henderson Group increased its ACM Research (ACMR) stake by 0.24% in Q1 2026, buying an estimated $141K and bringing the position to 1,085,634 shares worth $42.7M. The position accounts for 0.02% of the portfolio, ranked #445.

Janus Henderson Group first reported a position in ACMR in Q4 2019 and has held it in 26 quarters since. The position peaked at $42.7M in Q4 2025. 300 funds tracked by Wall St. Rank hold ACMR as of Q1 2026.

  • Janus Henderson Group held 1,085,634 shares of ACM Research worth $42.7M as of Q1 2026.
  • Janus Henderson Group bought 2,652 ACM Research shares in Q1 2026, an estimated $141K.
  • ACM Research made up 0.02% of Janus Henderson Group's portfolio in Q1 2026, its #445 holding.
  • Janus Henderson Group first reported a position in ACM Research in Q4 2019 and has held it in 26 quarters since.
  • Janus Henderson Group's ACM Research position peaked at $42.7M in Q4 2025.
  • 300 funds tracked by Wall St. Rank held ACM Research as of Q1 2026.

Based on Janus Henderson Group's 13F filing for Q1 2026, filed 15 May 2026.