Ticker · CUSIP 038336103
Holders (tracked)
13
Combined shares
2,863,162
Combined value
$349.19M
Last close
$130.63
Quarter
2025Q4
Price · 1Y$130.63-11.29 (-7.96%)H $160.60 · L $112.68 · Avg Vol 478K
Congress buy
Tracked holders · last 8 quarters
Flat over the last 8 quarters.
Price is +7.1% vs the avg quarter-end implied price across tracked holders.
SEC event timeline
26 events
- +74,998 shares · 2025Q4Position
- Ken Griffin (Citadel Advisors) trimmed2026-02-17−64,364 shares · 2025Q4Position
- D.E. Shaw & Co. added2026-02-17+112,369 shares · 2025Q4Position
- AQR Capital Management added2026-02-17+306,662 shares · 2025Q4Position
- Two Sigma Investments added2026-02-17+157,969 shares · 2025Q4Position
- Jeremy Grantham (GMO) trimmed2026-02-17−159,986 shares · 2025Q4Position
- Izzy Englander (Millennium Mgmt) trimmed2026-02-17−189,348 shares · 2025Q4Position
- T. Rowe Price added2026-02-17+2,912 shares · 2025Q4Position
- Wellington Management trimmed2026-02-17−552 shares · 2025Q4Position
- −18,568 shares · 2025Q4Position
- Renaissance Technologies added2026-02-12+28,500 shares · 2025Q4Position
- Norges Bank (Norway SWF) opened position2026-02-10+746,940 shares · 2025Q4Position
- Ken Fisher (Fisher Asset Mgmt) trimmed2026-02-09−4,814 shares · 2025Q4Position
- −63,115 shares · 2025Q3Position
- AQR Capital Management added2025-11-14+131,867 shares · 2025Q3Position
- Izzy Englander (Millennium Mgmt) trimmed2025-11-14−73,539 shares · 2025Q3Position
- Two Sigma Investments trimmed2025-11-14−29,194 shares · 2025Q3Position
- D.E. Shaw & Co. added2025-11-14+73,185 shares · 2025Q3Position
- T. Rowe Price added2025-11-14+3,540 shares · 2025Q3Position
- Wellington Management trimmed2025-11-14−233 shares · 2025Q3Position
- Renaissance Technologies added2025-11-13+22,000 shares · 2025Q3Position
- Norges Bank (Norway SWF) exited2025-11-13−755,492 shares · 2025Q3Position
- Jeremy Grantham (GMO) added2025-11-13+3,644 shares · 2025Q3Position
- +18,568 shares · 2025Q3Position
- Ken Fisher (Fisher Asset Mgmt) trimmed2025-11-12−3,472 shares · 2025Q3Position
- Norges Bank (Norway SWF) trimmed2025-11-12−11,193 shares · 2024Q3Position
Insider activity
No insider transactions in the last 30 days.
Follow-the-investor returns
If you'd copied each holder of ATR…
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 |
|---|---|---|---|---|
| T. Rowe Price | 2016Q1 | $115.02 | +13.6% | $6.9M |
| Ken Griffin (Citadel Advisors) | 2016Q1 | $124.44 | +5.0% | $5.2M |
| Ken Griffin (Citadel Advisors) | 2016Q1 | $124.44 | +5.0% | $5.2M |
| Two Sigma Investments | 2017Q1 | $125.82 | +3.8% | $26.1M |
| Ken Fisher (Fisher Asset Mgmt) | 2018Q3 | $127.28 | +2.6% | $3.0M |
| Wellington Management | 2016Q1 | $127.69 | +2.3% | $1.8M |
| D.E. Shaw & Co. | 2016Q1 | $127.71 | +2.3% | $25.8M |
| Renaissance Technologies | 2016Q1 | $131.92 | -1.0% | $18.8M |
| AQR Capital Management | 2016Q1 | $135.50 | -3.6% | $110.2M |
| Jeremy Grantham (GMO) | 2016Q1 | $135.65 | -3.7% | $30.2M |
| Paul Tudor Jones (Tudor Investment) | 2016Q1 | $143.12 | -8.7% | $9.8M |
| Izzy Englander (Millennium Mgmt) | 2016Q1 | $151.47 | -13.8% | $27.8M |
| Norges Bank (Norway SWF) | 2016Q1 | $7235.55 | -98.2% | $97.6M |
Who moved on this name in 2025Q4
Position changes reported for the latest quarter, grouped by direction.
New positions2
- Norges Bank (Norway SWF)+746,940$91.1M
- Paul Tudor Jones (Tudor Investment)+74,998$9.1M
Added to5
- AQR Capital Management+306,662$37.4M
- Two Sigma Investments+157,969$19.3M
- D.E. Shaw & Co.+112,369$13.7M
- Renaissance Technologies+28,500$3.5M
- T. Rowe Price+2,912$355
Trimmed5
- Izzy Englander (Millennium Mgmt)−189,348$23.1M
- Jeremy Grantham (GMO)−159,986$19.5M
- Ken Griffin (Citadel Advisors)−64,364$7.8M
- Ken Fisher (Fisher Asset Mgmt)−4,814$587K
- Wellington Management−552$67K
Exited1
- Ray Dalio (Bridgewater Associates)−18,568$2.5M
Institutional ownership over time
Distinct super-investors holding this ticker · combined dollar value, by quarter.
| Quarter | Holders | Combined value |
|---|---|---|
| 2022Q1 | 13 | $68.38B |
| 2022Q2 | 12 | $60.07B |
| 2022Q3 | 12 | $629.5M |
| 2022Q4 | 14 | $744.1M |
| 2023Q1 | 14 | $790.7M |
| 2023Q2 | 15 | $888.3M |
| 2023Q3 | 14 | $945.7M |
| 2023Q4 | 14 | $922.8M |
| 2024Q1 | 14 | $1.18B |
| 2024Q2 | 15 | $1.16B |
| 2024Q3 | 13 | $298.3M |
| 2024Q4 | 12 | $228.9M |
| 2025Q1 | 13 | $167.7M |
| 2025Q2 | 14 | $379.5M |
| 2025Q3 | 13 | $247.2M |
| 2025Q4 | 13 | $349.2M |
Congress members trading this stock
| Date | Member | Type | Amount range | Filing |
|---|---|---|---|---|
| 2025-06-24 | Lisa McClain | Buy | $1K – $15K | PDF ↗ |
Who owns ATR
13 super-investors · 2025Q4
Tracked stake
2.86M
shares
Combined value
$349M
% of shares outstanding
—
shares-out unknown
Quarter action mix
New2Added5Trim6
| # | Manager | Shares | Value |
|---|---|---|---|
| 1 | AQR Capital Management | 843.6K | $103M |
| 2 | Norges Bank Norway SWF | 746.9K | $91M |
| 3 | Jeremy Grantham GMO | 231.0K | $28M |
| 4 | Izzy Englander Millennium Mgmt | 212.5K | $26M |
| 5 | Two Sigma Investments | 199.7K | $24M |
| 6 | D.E. Shaw & Co. | 197.1K | $24M |
| 7 | Renaissance Technologies | 143.6K | $18M |
| 8 | Ken Griffin Citadel Advisors | 83.6K | $10M |
| 9 | Paul Tudor Jones Tudor Investment | 75.0K | $9M |
| 10 | T. Rowe Price | 53.0K | $6M |
| 11 | Ken Griffin Citadel Advisors | 39.9K | $5M |
| 12 | Ken Fisher Fisher Asset Mgmt | 23.1K | $3M |
| 13 | Wellington Management | 14.1K | $2M |
Recent moves
20 transactions
- +157,969 · 2025Q4
- −552 · 2025Q4
- −159,986 · 2025Q4
- +306,662 · 2025Q4
- +112,369 · 2025Q4
- −189,348 · 2025Q4
- +2,912 · 2025Q4
- +74,998 · 2025Q4
- −64,364 · 2025Q4
- −18,568 · 2025Q4
- +28,500 · 2025Q4
- +746,940 · 2025Q4
- −4,814 · 2025Q4
- −63,115 · 2025Q3
- −233 · 2025Q3
- −29,194 · 2025Q3
- +73,185 · 2025Q3
- −73,539 · 2025Q3
- +3,540 · 2025Q3
- +131,867 · 2025Q3
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