Ticker · CUSIP 03212B103
Holders (tracked)
6
Combined shares
1,055,302
Combined value
$4.82M
Last close
$5.29
Quarter
2025Q4
Price · 1Y$5.29+2.73 (+106.64%)H $6.63 · L $2.39 · Avg Vol 1.0M
Position opened
Tracked holders · last 8 quarters
+1 vs previous quarter over the last 8.
Price is +15.8% vs the avg quarter-end implied price across tracked holders.
SEC event timeline
8 events
- Ken Griffin (Citadel Advisors) trimmed2026-02-17−213,276 shares · 2025Q4Position
- D.E. Shaw & Co. trimmed2026-02-17−88,462 shares · 2025Q4Position
- Steve Cohen (Point72) opened position2026-02-17+206,467 shares · 2025Q4Position
- Izzy Englander (Millennium Mgmt) trimmed2026-02-17−234,723 shares · 2025Q4Position
- AQR Capital Management exited2025-11-14−230,989 shares · 2025Q3Position
- Izzy Englander (Millennium Mgmt) trimmed2025-11-14−57,430 shares · 2025Q3Position
- D.E. Shaw & Co. opened position2025-11-14+194,569 shares · 2025Q3Position
- Renaissance Technologies exited2025-11-13−189,468 shares · 2025Q3Position
Insider activity
No insider transactions in the last 30 days.
Follow-the-investor returns
If you'd copied each holder of AMPY…
Cost basis inferred from each manager's quarter-over-quarter position changes. Sorted by % return on the position they're still holding.
| Investor | First in | Cost basis | Return | Position value today |
|---|---|---|---|---|
| Izzy Englander (Millennium Mgmt) | 2019Q3 | $3.62 | +45.9% | $742K |
| Steve Cohen (Point72) | 2019Q4 | $4.58 | +15.6% | $1.1M |
| Ken Griffin (Citadel Advisors) | 2019Q3 | $4.79 | +10.4% | $1.6M |
| Ken Griffin (Citadel Advisors) | 2019Q3 | $4.79 | +10.4% | $1.6M |
| Ken Griffin (Citadel Advisors) | 2019Q3 | $4.79 | +10.4% | $1.6M |
| D.E. Shaw & Co. | 2021Q3 | $5.72 | -7.5% | $561K |
Who moved on this name in 2025Q4
Position changes reported for the latest quarter, grouped by direction.
New positions1
- Steve Cohen (Point72)+206,467$944K
Added to0
—
Trimmed3
- Izzy Englander (Millennium Mgmt)−234,723$1.1M
- Ken Griffin (Citadel Advisors)−213,276$975K
- D.E. Shaw & Co.−88,462$404K
Exited0
—
Institutional ownership over time
Distinct super-investors holding this ticker · combined dollar value, by quarter.
| Quarter | Holders | Combined value |
|---|---|---|
| 2022Q1 | 7 | $9.1M |
| 2022Q2 | 6 | $20.0M |
| 2022Q3 | 7 | $21.1M |
| 2022Q4 | 9 | $31.7M |
| 2023Q1 | 8 | $26.4M |
| 2023Q2 | 8 | $26.1M |
| 2023Q3 | 8 | $30.2M |
| 2023Q4 | 6 | $24.7M |
| 2024Q1 | 8 | $24.5M |
| 2024Q2 | 6 | $25.2M |
| 2024Q3 | 9 | $6.4M |
| 2024Q4 | 7 | $4.0M |
| 2025Q1 | 7 | $4.4M |
| 2025Q2 | 5 | $3.4M |
| 2025Q3 | 5 | $6.9M |
| 2025Q4 | 6 | $4.8M |
Who owns AMPY
6 super-investors · 2025Q4
Tracked stake
1.06M
shares
Combined value
$5M
% of shares outstanding
—
shares-out unknown
Quarter action mix
New1Trim5
| # | Manager | Shares | Value |
|---|---|---|---|
| 1 | Ken Griffin Citadel Advisors | 296.3K | $1M |
| 2 | Steve Cohen Point72 | 206.5K | $944K |
| 3 | Ken Griffin Citadel Advisors | 162.5K | $743K |
| 4 | Ken Griffin Citadel Advisors | 143.7K | $657K |
| 5 | Izzy Englander Millennium Mgmt | 140.3K | $641K |
| 6 | D.E. Shaw & Co. | 106.1K | $485K |
Recent moves
20 transactions
- −213,276 · 2025Q4
- TRIMD.E. Shaw & Co.−88,462 · 2025Q4
- −234,723 · 2025Q4
- +206,467 · 2025Q4
- +194,569 · 2025Q3
- −230,989 · 2025Q3
- −57,430 · 2025Q3
- −189,468 · 2025Q3
- +212,107 · 2025Q2
- −162,500 · 2025Q2
- SOLDT. Rowe Price−16,842 · 2025Q2
- +8,768 · 2025Q2
- +109,187 · 2025Q1
- −22,157 · 2025Q1
- +220,308 · 2025Q1
- +169,400 · 2025Q1
- +1,913 · 2025Q1
- −10,687 · 2024Q4
- −32,493 · 2024Q4
- +2,367 · 2024Q4
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