Ticker · CUSIP 00108J109
Holders (tracked)
16
Combined shares
3,253,540
Combined value
$126.49M
Last close
—
Quarter
2025Q4
Tracked holders · last 8 quarters
+2 vs previous quarter over the last 8.
SEC event timeline
26 events
- Ken Griffin (Citadel Advisors) trimmed2026-02-17−251,947 shares · 2025Q413F
- D.E. Shaw & Co. trimmed2026-02-17−82,745 shares · 2025Q413F
- Two Sigma Investments exited2026-02-17−194,338 shares · 2025Q413F
- Izzy Englander (Millennium Mgmt) trimmed2026-02-17−186,838 shares · 2025Q413F
- T. Rowe Price added2026-02-17+1,981 shares · 2025Q413F
- +54,400 shares · 2025Q413F
- Steve Cohen (Point72) added2026-02-17+147,500 shares · 2025Q413F
- Jeremy Grantham (GMO) added2026-02-17+1,686 shares · 2025Q413F
- AQR Capital Management trimmed2026-02-17−13,138 shares · 2025Q413F
- Southeastern Asset (Longleaf) added2026-02-13+194,494 shares · 2025Q413F
- Dodge & Cox trimmed2026-02-13−10,500 shares · 2025Q413F
- Renaissance Technologies trimmed2026-02-12−175,486 shares · 2025Q413F
- Norges Bank (Norway SWF) opened position2026-02-10+28,528 shares · 2025Q413F
- −240,742 shares · 2025Q313F
- D.E. Shaw & Co. opened position2025-11-14+113,584 shares · 2025Q313F
- Izzy Englander (Millennium Mgmt) trimmed2025-11-14−308,011 shares · 2025Q313F
- T. Rowe Price added2025-11-14+3,277 shares · 2025Q313F
- Southeastern Asset (Longleaf) added2025-11-14+299,943 shares · 2025Q313F
- AQR Capital Management trimmed2025-11-14−56,630 shares · 2025Q313F
- Steve Cohen (Point72) exited2025-11-14−252,270 shares · 2025Q313F
- Two Sigma Investments opened position2025-11-14+194,338 shares · 2025Q313F
- Norges Bank (Norway SWF) exited2025-11-13−28,528 shares · 2025Q313F
- Renaissance Technologies added2025-11-13+262,925 shares · 2025Q313F
- Dodge & Cox added2025-11-13+41,800 shares · 2025Q313F
- Jeremy Grantham (GMO) opened position2025-11-13+18,601 shares · 2025Q313F
- Norges Bank (Norway SWF) trimmed2025-11-12−113,300 shares · 2024Q313F
Insider activity
No insider transactions in the last 30 days.
Who moved on this name in 2025Q4
13F transactions reported for the latest quarter, grouped by direction.
New positions2
- Paul Tudor Jones (Tudor Investment)+54,400$2.1M
- Norges Bank (Norway SWF)+28,528$1.1M
Added to4
- Southeastern Asset (Longleaf)+194,494$7.7M
- Steve Cohen (Point72)+147,500$5.8M
- Jeremy Grantham (GMO)+1,686$67K
- T. Rowe Price+1,981$78
Trimmed6
- Ken Griffin (Citadel Advisors)−251,947$9.9M
- Izzy Englander (Millennium Mgmt)−186,838$7.4M
- Renaissance Technologies−175,486$6.9M
- D.E. Shaw & Co.−82,745$3.3M
- AQR Capital Management−13,138$518K
- Dodge & Cox−10,500$414K
Exited1
- Two Sigma Investments−194,338$7.6M
Institutional ownership over time
Distinct super-investors holding this ticker · combined dollar value, by quarter.
| Quarter | Holders | Combined value |
|---|---|---|
| 2022Q1 | 11 | $10.73B |
| 2022Q2 | 7 | $85.7M |
| 2022Q3 | 10 | $67K |
| 2022Q4 | 11 | $35.6M |
| 2023Q1 | 11 | $59.9M |
| 2023Q2 | 10 | $72.1M |
| 2023Q3 | 10 | $86.5M |
| 2023Q4 | 10 | $91.4M |
| 2024Q1 | 11 | $166.6M |
| 2024Q2 | 11 | $160.7M |
| 2024Q3 | 9 | $43.3M |
| 2024Q4 | 8 | $22.0M |
| 2025Q1 | 13 | $63.1M |
| 2025Q2 | 17 | $92.5M |
| 2025Q3 | 14 | $148.3M |
| 2025Q4 | 16 | $126.5M |
Who owns ACMR
16 super-investors · 2025Q4
Tracked stake
3.25M
shares
Combined value
$126M
% of shares outstanding
—
shares-out unknown
Quarter action mix
New3Added5Trim8
| # | Manager | Shares | Value |
|---|---|---|---|
| 1 | Southeastern Asset Longleaf | 1.68M | $66M |
| 2 | AQR Capital Management | 343.6K | $14M |
| 3 | Ken Griffin Citadel Advisors | 299.8K | $12M |
| 4 | Ken Griffin Citadel Advisors | 188.7K | $7M |
| 5 | Ken Griffin Citadel Advisors | 143.0K | $6M |
| 6 | Renaissance Technologies | 124.4K | $5M |
| 7 | Dodge & Cox | 112.4K | $4M |
| 8 | Steve Cohen Point72 | 79.1K | $3M |
| 9 | Steve Cohen Point72 | 77.4K | $3M |
| 10 | Paul Tudor Jones Tudor Investment | 45.4K | $2M |
| 11 | D.E. Shaw & Co. | 30.8K | $1M |
| 12 | Norges Bank Norway SWF | 28.5K | $1M |
| 13 | Izzy Englander Millennium Mgmt | 23.5K | $927K |
| 14 | Jeremy Grantham GMO | 20.3K | $800K |
| 15 | Paul Tudor Jones Tudor Investment | 9.0K | $355K |
| 16 | T. Rowe Price | 47.3K | $2K |
Recent moves
20 transactions
- +147,500 · 2025Q4
- −251,947 · 2025Q4
- +1,686 · 2025Q4
- −13,138 · 2025Q4
- +54,400 · 2025Q4
- −194,338 · 2025Q4
- −186,838 · 2025Q4
- +1,981 · 2025Q4
- TRIMD.E. Shaw & Co.−82,745 · 2025Q4
- +194,494 · 2025Q4
- TRIMDodge & Cox−10,500 · 2025Q4
- −175,486 · 2025Q4
- +28,528 · 2025Q4
- −240,742 · 2025Q3
- +113,584 · 2025Q3
- −252,270 · 2025Q3
- +194,338 · 2025Q3
- −308,011 · 2025Q3
- +3,277 · 2025Q3
- +299,943 · 2025Q3
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