Ticker · CUSIP 03213A104
Holders (tracked)
14
Combined shares
16,393,375
Combined value
$189.84M
Last close
$6.98
Quarter
2025Q4
Price · 1Y$6.98-1.20 (-14.67%)H $13.29 · L $5.61 · Avg Vol 1.6M
Position opened
Tracked holders · last 8 quarters
+1 vs previous quarter over the last 8.
Price is -39.7% vs the avg quarter-end implied price across tracked holders.
SEC event timeline
20 events
- Ken Griffin (Citadel Advisors) added2026-02-17+803,478 shares · 2025Q4Position
- Two Sigma Investments added2026-02-17+345,411 shares · 2025Q4Position
- Izzy Englander (Millennium Mgmt) added2026-02-17+191,049 shares · 2025Q4Position
- Steve Cohen (Point72) added2026-02-17+2,222,589 shares · 2025Q4Position
- T. Rowe Price trimmed2026-02-17−89,190 shares · 2025Q4Position
- +1,500,000 shares · 2025Q4Position
- Wellington Management trimmed2026-02-17−62,548 shares · 2025Q4Position
- AQR Capital Management added2026-02-17+202,349 shares · 2025Q4Position
- Renaissance Technologies trimmed2026-02-12−93,466 shares · 2025Q4Position
- Baillie Gifford & Co added2026-01-23+59,984 shares · 2025Q4Position
- −414,830 shares · 2025Q3Position
- Two Sigma Investments added2025-11-14+223,585 shares · 2025Q3Position
- Wellington Management added2025-11-14+1,797,228 shares · 2025Q3Position
- AQR Capital Management added2025-11-14+441,921 shares · 2025Q3Position
- Steve Cohen (Point72) added2025-11-14+81,005 shares · 2025Q3Position
- D.E. Shaw & Co. exited2025-11-14−11,555 shares · 2025Q3Position
- T. Rowe Price trimmed2025-11-14−32,986 shares · 2025Q3Position
- Izzy Englander (Millennium Mgmt) added2025-11-14+155,519 shares · 2025Q3Position
- Renaissance Technologies trimmed2025-11-13−72,185 shares · 2025Q3Position
- Baillie Gifford & Co added2025-10-31+703,328 shares · 2025Q3Position
Insider activity
No insider transactions in the last 30 days.
Follow-the-investor returns
If you'd copied each holder of AMPL…
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 |
|---|---|---|---|---|
| Baillie Gifford & Co | 2025Q1 | $10.36 | -32.6% | $19.1M |
| AQR Capital Management | 2023Q2 | $10.89 | -35.9% | $5.9M |
| Wellington Management | 2022Q4 | $10.90 | -36.0% | $13.7M |
| Renaissance Technologies | 2022Q3 | $10.97 | -36.4% | $570K |
| Glen Kacher (Light Street Capital) | 2023Q2 | $11.31 | -38.3% | $10.5M |
| Izzy Englander (Millennium Mgmt) | 2021Q3 | $11.54 | -39.5% | $4.5M |
| Izzy Englander (Millennium Mgmt) | 2021Q3 | $11.54 | -39.5% | $4.5M |
| Izzy Englander (Millennium Mgmt) | 2021Q3 | $11.54 | -39.5% | $4.5M |
| Ken Griffin (Citadel Advisors) | 2021Q4 | $11.57 | -39.7% | $9.6M |
| Ken Griffin (Citadel Advisors) | 2021Q4 | $11.57 | -39.7% | $9.6M |
| Ken Griffin (Citadel Advisors) | 2021Q4 | $11.57 | -39.7% | $9.6M |
| Steve Cohen (Point72) | 2022Q1 | $11.69 | -40.3% | $24.4M |
| Two Sigma Investments | 2022Q4 | $11.75 | -40.6% | $7.3M |
| T. Rowe Price | 2021Q3 | $12.20 | -42.8% | $859K |
Who moved on this name in 2025Q4
Position changes reported for the latest quarter, grouped by direction.
New positions1
- Glen Kacher (Light Street Capital)+1,500,000$17.4M
Added to6
- Steve Cohen (Point72)+2,222,589$25.7M
- Ken Griffin (Citadel Advisors)+803,478$9.3M
- Two Sigma Investments+345,411$4.0M
- AQR Capital Management+202,349$2.3M
- Izzy Englander (Millennium Mgmt)+191,049$2.2M
- Baillie Gifford & Co+59,984$695K
Trimmed3
- Renaissance Technologies−93,466$1.1M
- Wellington Management−62,548$724K
- T. Rowe Price−89,190$1K
Exited0
—
Institutional ownership over time
Distinct super-investors holding this ticker · combined dollar value, by quarter.
| Quarter | Holders | Combined value |
|---|---|---|
| 2022Q1 | 11 | $85.0M |
| 2022Q2 | 8 | $98.7M |
| 2022Q3 | 9 | $79.1M |
| 2022Q4 | 11 | $73.1M |
| 2023Q1 | 10 | $63.1M |
| 2023Q2 | 12 | $78.9M |
| 2023Q3 | 11 | $96.1M |
| 2023Q4 | 9 | $87.5M |
| 2024Q1 | 6 | $66.5M |
| 2024Q2 | 9 | $59.3M |
| 2024Q3 | 8 | $6.8M |
| 2024Q4 | 9 | $12.6M |
| 2025Q1 | 10 | $48.1M |
| 2025Q2 | 14 | $99.7M |
| 2025Q3 | 13 | $115.5M |
| 2025Q4 | 14 | $189.8M |
Who owns AMPL
14 super-investors · 2025Q4
Tracked stake
16.39M
shares
Combined value
$190M
% of shares outstanding
—
shares-out unknown
Quarter action mix
New1Added10Trim3
| # | Manager | Shares | Value |
|---|---|---|---|
| 1 | Steve Cohen Point72 | 3.50M | $41M |
| 2 | Baillie Gifford & Co | 2.74M | $32M |
| 3 | Izzy Englander Millennium Mgmt | 2.25M | $26M |
| 4 | Wellington Management | 1.96M | $23M |
| 5 | Glen Kacher Light Street Capital | 1.50M | $17M |
| 6 | Ken Griffin Citadel Advisors | 1.38M | $16M |
| 7 | Two Sigma Investments | 1.04M | $12M |
| 8 | AQR Capital Management | 843.4K | $10M |
| 9 | Izzy Englander Millennium Mgmt | 640.0K | $7M |
| 10 | Izzy Englander Millennium Mgmt | 200.0K | $2M |
| 11 | T. Rowe Price | 123.1K | $1M |
| 12 | Ken Griffin Citadel Advisors | 118.5K | $1M |
| 13 | Renaissance Technologies | 81.6K | $945K |
| 14 | Ken Griffin Citadel Advisors | 12.1K | $140K |
Recent moves
20 transactions
- −62,548 · 2025Q4
- +803,478 · 2025Q4
- +202,349 · 2025Q4
- +345,411 · 2025Q4
- +191,049 · 2025Q4
- +2,222,589 · 2025Q4
- +1,500,000 · 2025Q4
- TRIMT. Rowe Price−89,190 · 2025Q4
- −93,466 · 2025Q4
- +59,984 · 2025Q4
- −414,830 · 2025Q3
- SOLDD.E. Shaw & Co.−11,555 · 2025Q3
- +441,921 · 2025Q3
- +81,005 · 2025Q3
- TRIMT. Rowe Price−32,986 · 2025Q3
- +155,519 · 2025Q3
- +1,797,228 · 2025Q3
- +223,585 · 2025Q3
- −72,185 · 2025Q3
- +703,328 · 2025Q3
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