Ticker · CUSIP 03676C100
Holders (tracked)
6
Combined shares
1,169,504
Combined value
$25.53M
Last close
$42.19
Quarter
2025Q4
Price · 1Y$42.19+9.61 (+29.50%)H $42.19 · L $17.99 · Avg Vol 245K
Position opened
Tracked holders · last 8 quarters
+1 vs previous quarter over the last 8.
Price is +93.3% vs the avg quarter-end implied price across tracked holders.
SEC event timeline
11 events
- D.E. Shaw & Co. trimmed2026-02-17−69,310 shares · 2025Q4Position
- Ken Griffin (Citadel Advisors) trimmed2026-02-17−2,714 shares · 2025Q4Position
- AQR Capital Management exited2026-02-17−19,459 shares · 2025Q4Position
- Izzy Englander (Millennium Mgmt) added2026-02-17+404,838 shares · 2025Q4Position
- +124,943 shares · 2025Q4Position
- Mario Gabelli (GAMCO) added2026-02-05+102,400 shares · 2025Q4Position
- −117,167 shares · 2025Q3Position
- Izzy Englander (Millennium Mgmt) trimmed2025-11-14−22,453 shares · 2025Q3Position
- D.E. Shaw & Co. trimmed2025-11-14−101,313 shares · 2025Q3Position
- AQR Capital Management opened position2025-11-14+19,459 shares · 2025Q3Position
- Mario Gabelli (GAMCO) added2025-11-12+46,645 shares · 2025Q3Position
Insider activity
No insider transactions in the last 30 days.
Follow-the-investor returns
If you'd copied each holder of ATEX…
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 |
|---|---|---|---|---|
| Ken Griffin (Citadel Advisors) | 2020Q1 | $22.31 | +89.1% | $4.6M |
| Ken Griffin (Citadel Advisors) | 2020Q1 | $22.31 | +89.1% | $4.6M |
| Izzy Englander (Millennium Mgmt) | 2020Q1 | $22.98 | +83.6% | $18.6M |
| Mario Gabelli (GAMCO) | 2021Q4 | $28.52 | +47.9% | $17.8M |
| D.E. Shaw & Co. | 2019Q3 | $37.28 | +13.2% | $2.6M |
| Paul Tudor Jones (Tudor Investment) | 2021Q1 | $40.21 | +4.9% | $5.3M |
Who moved on this name in 2025Q4
Position changes reported for the latest quarter, grouped by direction.
New positions1
- Paul Tudor Jones (Tudor Investment)+124,943$2.7M
Added to2
- Izzy Englander (Millennium Mgmt)+404,838$8.8M
- Mario Gabelli (GAMCO)+102,400$2.2M
Trimmed2
- D.E. Shaw & Co.−69,310$1.5M
- Ken Griffin (Citadel Advisors)−2,714$59K
Exited1
- AQR Capital Management−19,459$418K
Institutional ownership over time
Distinct super-investors holding this ticker · combined dollar value, by quarter.
| Quarter | Holders | Combined value |
|---|---|---|
| 2022Q1 | 9 | $63.8M |
| 2022Q2 | 7 | $44.3M |
| 2022Q3 | 8 | $52.9M |
| 2022Q4 | 9 | $48.8M |
| 2023Q1 | 8 | $51.1M |
| 2023Q2 | 8 | $51.8M |
| 2023Q3 | 9 | $50.5M |
| 2023Q4 | 9 | $52.9M |
| 2024Q1 | 8 | $49.0M |
| 2024Q2 | 10 | $68.1M |
| 2024Q3 | 8 | $30.7M |
| 2024Q4 | 9 | $23.7M |
| 2025Q1 | 8 | $36.2M |
| 2025Q2 | 7 | $25.2M |
| 2025Q3 | 5 | $13.2M |
| 2025Q4 | 6 | $25.5M |
Who owns ATEX
6 super-investors · 2025Q4
Tracked stake
1.17M
shares
Combined value
$26M
% of shares outstanding
—
shares-out unknown
Quarter action mix
New1Added2Trim3
| # | Manager | Shares | Value |
|---|---|---|---|
| 1 | Izzy Englander Millennium Mgmt | 439.9K | $10M |
| 2 | Mario Gabelli GAMCO | 422.5K | $9M |
| 3 | Paul Tudor Jones Tudor Investment | 124.9K | $3M |
| 4 | Ken Griffin Citadel Advisors | 108.4K | $2M |
| 5 | D.E. Shaw & Co. | 61.8K | $1M |
| 6 | Ken Griffin Citadel Advisors | 12.0K | $262K |
Recent moves
20 transactions
- −19,459 · 2025Q4
- −2,714 · 2025Q4
- +404,838 · 2025Q4
- TRIMD.E. Shaw & Co.−69,310 · 2025Q4
- +124,943 · 2025Q4
- +102,400 · 2025Q4
- −117,167 · 2025Q3
- TRIMD.E. Shaw & Co.−101,313 · 2025Q3
- −22,453 · 2025Q3
- +19,459 · 2025Q3
- +46,645 · 2025Q3
- TRIMD.E. Shaw & Co.−16,020 · 2025Q2
- −11,489 · 2025Q2
- −22,830 · 2025Q2
- −58,912 · 2025Q2
- +70,855 · 2025Q2
- −2,630 · 2025Q1
- +40,983 · 2025Q1
- −1,460 · 2025Q1
- +39,143 · 2025Q1
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