Ticker · CUSIP 046433108
Holders (tracked)
14
Combined shares
2,477,670
Combined value
$133.42M
Last close
—
Quarter
2025Q4
Tracked holders · last 8 quarters
+3 vs previous quarter over the last 8.
SEC event timeline
23 events
- T. Rowe Price added2026-02-17+1,422 shares · 2025Q413F
- D.E. Shaw & Co. trimmed2026-02-17−388,637 shares · 2025Q413F
- +96,386 shares · 2025Q413F
- Two Sigma Investments trimmed2026-02-17−27,699 shares · 2025Q413F
- AQR Capital Management added2026-02-17+2,998 shares · 2025Q413F
- Izzy Englander (Millennium Mgmt) added2026-02-17+14,092 shares · 2025Q413F
- Steve Cohen (Point72) opened position2026-02-17+497,260 shares · 2025Q413F
- Ken Griffin (Citadel Advisors) added2026-02-17+165,312 shares · 2025Q413F
- Renaissance Technologies trimmed2026-02-12−111,580 shares · 2025Q413F
- Ken Fisher (Fisher Asset Mgmt) trimmed2026-02-09−4,638 shares · 2025Q413F
- Mario Gabelli (GAMCO) added2026-02-05+6,800 shares · 2025Q413F
- −6,000 shares · 2025Q413F
- −213,209 shares · 2025Q313F
- Two Sigma Investments trimmed2025-11-14−59,742 shares · 2025Q313F
- D.E. Shaw & Co. added2025-11-14+33,462 shares · 2025Q313F
- T. Rowe Price added2025-11-14+1,415 shares · 2025Q313F
- AQR Capital Management added2025-11-14+17,213 shares · 2025Q313F
- Izzy Englander (Millennium Mgmt) trimmed2025-11-14−337,733 shares · 2025Q313F
- Steve Cohen (Point72) exited2025-11-14−34,224 shares · 2025Q313F
- Renaissance Technologies trimmed2025-11-13−180,300 shares · 2025Q313F
- First Eagle Investment Management added2025-11-12+14,000 shares · 2025Q313F
- Mario Gabelli (GAMCO) trimmed2025-11-12−300 shares · 2025Q313F
- Ken Fisher (Fisher Asset Mgmt) trimmed2025-11-12−21,022 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 positions2
- Steve Cohen (Point72)+497,260$27.0M
- Paul Tudor Jones (Tudor Investment)+96,386$5.2M
Added to5
- Ken Griffin (Citadel Advisors)+165,312$9.0M
- Izzy Englander (Millennium Mgmt)+14,092$764K
- Mario Gabelli (GAMCO)+6,800$369K
- AQR Capital Management+2,998$163K
- T. Rowe Price+1,422$77
Trimmed5
- D.E. Shaw & Co.−388,637$21.1M
- Renaissance Technologies−111,580$6.1M
- Two Sigma Investments−27,699$1.5M
- First Eagle Investment Management−6,000$325K
- Ken Fisher (Fisher Asset Mgmt)−4,638$252K
Exited0
—
Institutional ownership over time
Distinct super-investors holding this ticker · combined dollar value, by quarter.
| Quarter | Holders | Combined value |
|---|---|---|
| 2022Q1 | 9 | $39.6M |
| 2022Q2 | 9 | $28.1M |
| 2022Q3 | 8 | $21K |
| 2022Q4 | 10 | $24.8M |
| 2023Q1 | 14 | $36.8M |
| 2023Q2 | 10 | $52.0M |
| 2023Q3 | 14 | $43.3M |
| 2023Q4 | 12 | $51.8M |
| 2024Q1 | 13 | $55.1M |
| 2024Q2 | 14 | $64.8M |
| 2024Q3 | 14 | $24.5M |
| 2024Q4 | 13 | $33.9M |
| 2025Q1 | 14 | $72.2M |
| 2025Q2 | 13 | $109.9M |
| 2025Q3 | 11 | $100.6M |
| 2025Q4 | 14 | $133.4M |
Who owns ATRO
14 super-investors · 2025Q4
Tracked stake
2.48M
shares
Combined value
$133M
% of shares outstanding
—
shares-out unknown
Quarter action mix
New2Added7Trim5
| # | Manager | Shares | Value |
|---|---|---|---|
| 1 | Steve Cohen Point72 | 497.3K | $27M |
| 2 | D.E. Shaw & Co. | 493.4K | $27M |
| 3 | Izzy Englander Millennium Mgmt | 360.6K | $20M |
| 4 | Ken Griffin Citadel Advisors | 315.8K | $17M |
| 5 | AQR Capital Management | 258.2K | $14M |
| 6 | First Eagle Investment Management | 230.3K | $12M |
| 7 | Paul Tudor Jones Tudor Investment | 96.4K | $5M |
| 8 | Ken Fisher Fisher Asset Mgmt | 60.6K | $3M |
| 9 | Renaissance Technologies | 53.0K | $3M |
| 10 | Two Sigma Investments | 33.3K | $2M |
| 11 | Mario Gabelli GAMCO | 27.3K | $1M |
| 12 | Ken Griffin Citadel Advisors | 24.7K | $1M |
| 13 | Ken Griffin Citadel Advisors | 8.8K | $477K |
| 14 | T. Rowe Price | 17.9K | $971 |
Recent moves
20 transactions
- TRIMD.E. Shaw & Co.−388,637 · 2025Q4
- +96,386 · 2025Q4
- +165,312 · 2025Q4
- +1,422 · 2025Q4
- +14,092 · 2025Q4
- +497,260 · 2025Q4
- −27,699 · 2025Q4
- +2,998 · 2025Q4
- −111,580 · 2025Q4
- −4,638 · 2025Q4
- +6,800 · 2025Q4
- −6,000 · 2025Q4
- −213,209 · 2025Q3
- −34,224 · 2025Q3
- +1,415 · 2025Q3
- −59,742 · 2025Q3
- +33,462 · 2025Q3
- −337,733 · 2025Q3
- +17,213 · 2025Q3
- −180,300 · 2025Q3
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