Ticker · CUSIP 03214Q108
Holders (tracked)
12
Combined shares
7,045,465
Combined value
$54.95M
Last close
—
Quarter
2025Q4
Tracked holders · last 8 quarters
+3 vs previous quarter over the last 8.
SEC event timeline
14 events
- AQR Capital Management added2026-02-17+4,588 shares · 2025Q413F
- T. Rowe Price added2026-02-17+31,463 shares · 2025Q413F
- Two Sigma Investments trimmed2026-02-17−316,638 shares · 2025Q413F
- Ken Griffin (Citadel Advisors) trimmed2026-02-17−2,051,945 shares · 2025Q413F
- Izzy Englander (Millennium Mgmt) added2026-02-17+497,438 shares · 2025Q413F
- Steve Cohen (Point72) added2026-02-17+459,946 shares · 2025Q413F
- Renaissance Technologies added2026-02-12+100,425 shares · 2025Q413F
- Norges Bank (Norway SWF) opened position2026-02-10+1,304,838 shares · 2025Q413F
- Izzy Englander (Millennium Mgmt) trimmed2025-11-14−3,028,548 shares · 2025Q313F
- Steve Cohen (Point72) opened position2025-11-14+33,916 shares · 2025Q313F
- Two Sigma Investments added2025-11-14+341,969 shares · 2025Q313F
- T. Rowe Price trimmed2025-11-14−273,892 shares · 2025Q313F
- AQR Capital Management added2025-11-14+51,509 shares · 2025Q313F
- Renaissance Technologies trimmed2025-11-13−1,334,200 shares · 2025Q313F
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 positions1
- Norges Bank (Norway SWF)+1,304,838$10.3M
Added to5
- Izzy Englander (Millennium Mgmt)+497,438$3.9M
- Steve Cohen (Point72)+459,946$3.6M
- Renaissance Technologies+100,425$792K
- AQR Capital Management+4,588$36K
- T. Rowe Price+31,463$248
Trimmed2
- Ken Griffin (Citadel Advisors)−2,051,945$16.2M
- Two Sigma Investments−316,638$2.5M
Exited0
—
Institutional ownership over time
Distinct super-investors holding this ticker · combined dollar value, by quarter.
| Quarter | Holders | Combined value |
|---|---|---|
| 2022Q3 | 2 | $279 |
| 2022Q4 | 4 | $2.6M |
| 2023Q1 | 3 | $2.9M |
| 2023Q2 | 1 | $2.9M |
| 2023Q3 | 4 | $3.0M |
| 2023Q4 | 4 | $3.4M |
| 2024Q1 | 5 | $2.1M |
| 2024Q2 | 7 | $1.6M |
| 2024Q3 | 5 | $194K |
| 2024Q4 | 6 | $5.7M |
| 2025Q1 | 7 | $5.4M |
| 2025Q2 | 8 | $28.6M |
| 2025Q3 | 9 | $62.9M |
| 2025Q4 | 12 | $55.0M |
Who owns AMPX
12 super-investors · 2025Q4
Tracked stake
7.05M
shares
Combined value
$55M
% of shares outstanding
—
shares-out unknown
Quarter action mix
New1Added7Trim4
| # | Manager | Shares | Value |
|---|---|---|---|
| 1 | Two Sigma Investments | 1.44M | $11M |
| 2 | Norges Bank Norway SWF | 1.30M | $10M |
| 3 | Izzy Englander Millennium Mgmt | 1.09M | $9M |
| 4 | Ken Griffin Citadel Advisors | 746.3K | $6M |
| 5 | Steve Cohen Point72 | 619.3K | $5M |
| 6 | Ken Griffin Citadel Advisors | 505.3K | $4M |
| 7 | Steve Cohen Point72 | 493.9K | $4M |
| 8 | Ken Griffin Citadel Advisors | 454.9K | $4M |
| 9 | AQR Capital Management | 136.1K | $1M |
| 10 | Renaissance Technologies | 112.8K | $890K |
| 11 | Steve Cohen Point72 | 69.3K | $547K |
| 12 | T. Rowe Price | 80.6K | $636 |
Recent moves
20 transactions
- −316,638 · 2025Q4
- +4,588 · 2025Q4
- −2,051,945 · 2025Q4
- +459,946 · 2025Q4
- +497,438 · 2025Q4
- +31,463 · 2025Q4
- +100,425 · 2025Q4
- +1,304,838 · 2025Q4
- −3,028,548 · 2025Q3
- TRIMT. Rowe Price−273,892 · 2025Q3
- +33,916 · 2025Q3
- +341,969 · 2025Q3
- +51,509 · 2025Q3
- −1,334,200 · 2025Q3
- +2,238 · 2025Q2
- +1,000,130 · 2025Q2
- +2,220,367 · 2025Q2
- +323,007 · 2025Q2
- +1,332,200 · 2025Q2
- +678,442 · 2025Q1
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