Ticker · CUSIP 02081G201
Holders (tracked)
14
Combined shares
10,909,422
Combined value
$229.53M
Last close
$11.10
Quarter
2025Q4
Price · 1Y$11.10+0.54 (+5.11%)H $22.68 · L $10.31 · Avg Vol 2.3M
Position opened
Tracked holders · last 8 quarters
+3 vs previous quarter over the last 8.
Price is -47.2% vs the avg quarter-end implied price across tracked holders.
SEC event timeline
20 events
- T. Rowe Price added2026-02-17+6,654 shares · 2025Q4Position
- D.E. Shaw & Co. added2026-02-17+255,985 shares · 2025Q4Position
- +887,803 shares · 2025Q4Position
- AQR Capital Management trimmed2026-02-17−4,545 shares · 2025Q4Position
- Two Sigma Investments added2026-02-17+173,885 shares · 2025Q4Position
- Izzy Englander (Millennium Mgmt) added2026-02-17+1,658,349 shares · 2025Q4Position
- Steve Cohen (Point72) added2026-02-17+949,545 shares · 2025Q4Position
- Ken Griffin (Citadel Advisors) added2026-02-17+1,152,673 shares · 2025Q4Position
- Renaissance Technologies trimmed2026-02-12−108,869 shares · 2025Q4Position
- Norges Bank (Norway SWF) opened position2026-02-10+649,814 shares · 2025Q4Position
- −22,000 shares · 2025Q4Position
- −127,124 shares · 2025Q3Position
- Steve Cohen (Point72) trimmed2025-11-14−159,156 shares · 2025Q3Position
- Two Sigma Investments added2025-11-14+665,634 shares · 2025Q3Position
- D.E. Shaw & Co. opened position2025-11-14+14,128 shares · 2025Q3Position
- T. Rowe Price added2025-11-14+8,601 shares · 2025Q3Position
- AQR Capital Management trimmed2025-11-14−3,433 shares · 2025Q3Position
- Izzy Englander (Millennium Mgmt) added2025-11-14+82,622 shares · 2025Q3Position
- Renaissance Technologies added2025-11-13+234,800 shares · 2025Q3Position
- −10,300 shares · 2025Q3Position
Insider activity
No insider transactions in the last 30 days.
Follow-the-investor returns
If you'd copied each holder of ATEC…
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 |
|---|---|---|---|---|
| First Eagle Investment Management | 2024Q2 | $7.50 | +48.0% | $7.5M |
| AQR Capital Management | 2019Q3 | $9.23 | +20.3% | $6.7M |
| Renaissance Technologies | 2016Q3 | $11.61 | -4.4% | $9.7M |
| Two Sigma Investments | 2019Q3 | $12.32 | -9.9% | $21.8M |
| T. Rowe Price | 2020Q4 | $12.62 | -12.0% | $1.0M |
| Norges Bank (Norway SWF) | 2020Q3 | $17.09 | -35.1% | $7.2M |
| Izzy Englander (Millennium Mgmt) | 2018Q1 | $18.59 | -40.3% | $24.7M |
| Steve Cohen (Point72) | 2020Q4 | $19.88 | -44.2% | $12.2M |
| D.E. Shaw & Co. | 2021Q2 | $20.76 | -46.5% | $3.0M |
| Ken Griffin (Citadel Advisors) | 2019Q4 | $20.84 | -46.7% | $2.0M |
| Ken Griffin (Citadel Advisors) | 2019Q4 | $20.84 | -46.7% | $2.0M |
| Ken Griffin (Citadel Advisors) | 2019Q4 | $20.84 | -46.7% | $2.0M |
| Paul Tudor Jones (Tudor Investment) | 2022Q4 | $20.90 | -46.9% | $9.9M |
| Paul Tudor Jones (Tudor Investment) | 2022Q4 | $20.90 | -46.9% | $9.9M |
Who moved on this name in 2025Q4
Position changes reported for the latest quarter, grouped by direction.
New positions2
- Paul Tudor Jones (Tudor Investment)+887,803$18.7M
- Norges Bank (Norway SWF)+649,814$13.7M
Added to6
- Izzy Englander (Millennium Mgmt)+1,658,349$34.9M
- Ken Griffin (Citadel Advisors)+1,152,673$24.3M
- Steve Cohen (Point72)+949,545$20.0M
- D.E. Shaw & Co.+255,985$5.4M
- Two Sigma Investments+173,885$3.7M
- T. Rowe Price+6,654$140
Trimmed3
- Renaissance Technologies−108,869$2.3M
- First Eagle Investment Management−22,000$463K
- AQR Capital Management−4,545$96K
Exited0
—
Institutional ownership over time
Distinct super-investors holding this ticker · combined dollar value, by quarter.
| Quarter | Holders | Combined value |
|---|---|---|
| 2022Q1 | 9 | $105.0M |
| 2022Q2 | 11 | $1.29B |
| 2022Q3 | 10 | $75.4M |
| 2022Q4 | 11 | $123.6M |
| 2023Q1 | 11 | $195.5M |
| 2023Q2 | 12 | $198.2M |
| 2023Q3 | 12 | $183.5M |
| 2023Q4 | 11 | $250.6M |
| 2024Q1 | 11 | $234.3M |
| 2024Q2 | 11 | $166.5M |
| 2024Q3 | 11 | $39.9M |
| 2024Q4 | 12 | $44.6M |
| 2025Q1 | 12 | $50.7M |
| 2025Q2 | 11 | $53.0M |
| 2025Q3 | 11 | $79.1M |
| 2025Q4 | 14 | $229.5M |
Who owns ATEC
14 super-investors · 2025Q4
Tracked stake
10.91M
shares
Combined value
$230M
% of shares outstanding
—
shares-out unknown
Quarter action mix
New3Added8Trim3
| # | Manager | Shares | Value |
|---|---|---|---|
| 1 | Izzy Englander Millennium Mgmt | 2.23M | $47M |
| 2 | Two Sigma Investments | 1.97M | $41M |
| 3 | Ken Griffin Citadel Advisors | 1.34M | $28M |
| 4 | Steve Cohen Point72 | 1.10M | $23M |
| 5 | Paul Tudor Jones Tudor Investment | 887.8K | $19M |
| 6 | Renaissance Technologies | 870.1K | $18M |
| 7 | First Eagle Investment Management | 676.1K | $14M |
| 8 | Norges Bank Norway SWF | 649.8K | $14M |
| 9 | AQR Capital Management | 604.1K | $13M |
| 10 | D.E. Shaw & Co. | 270.1K | $6M |
| 11 | Ken Griffin Citadel Advisors | 181.7K | $4M |
| 12 | T. Rowe Price | 93.7K | $2M |
| 13 | Ken Griffin Citadel Advisors | 34.6K | $728K |
| 14 | Paul Tudor Jones Tudor Investment | 9.8K | $206K |
Recent moves
20 transactions
- +173,885 · 2025Q4
- +887,803 · 2025Q4
- +1,658,349 · 2025Q4
- +6,654 · 2025Q4
- +1,152,673 · 2025Q4
- +949,545 · 2025Q4
- +255,985 · 2025Q4
- −4,545 · 2025Q4
- −108,869 · 2025Q4
- +649,814 · 2025Q4
- −22,000 · 2025Q4
- −127,124 · 2025Q3
- −159,156 · 2025Q3
- −3,433 · 2025Q3
- +8,601 · 2025Q3
- +665,634 · 2025Q3
- +14,128 · 2025Q3
- +82,622 · 2025Q3
- +234,800 · 2025Q3
- −10,300 · 2025Q3
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