Ticker · CUSIP 039653100
Holders (tracked)
14
Combined shares
1,543,862
Combined value
$150.53M
Last close
$110.79
Quarter
2025Q4
Tracked holders · last 8 quarters
+2 vs previous quarter over the last 8.
Price is +13.6% vs the avg quarter-end implied price across tracked holders.
SEC event timeline
25 events
- Jeremy Grantham (GMO) opened position2026-02-17+40,298 shares · 2025Q413F
- Ken Griffin (Citadel Advisors) added2026-02-17+54,948 shares · 2025Q413F
- D.E. Shaw & Co. trimmed2026-02-17−31,085 shares · 2025Q413F
- Izzy Englander (Millennium Mgmt) added2026-02-17+23,527 shares · 2025Q413F
- Steve Cohen (Point72) added2026-02-17+33,826 shares · 2025Q413F
- T. Rowe Price added2026-02-17+81,103 shares · 2025Q413F
- AQR Capital Management added2026-02-17+2,868 shares · 2025Q413F
- +22,964 shares · 2025Q413F
- Renaissance Technologies exited2026-02-12−44,100 shares · 2025Q413F
- Norges Bank (Norway SWF) opened position2026-02-10+641,695 shares · 2025Q413F
- Ken Fisher (Fisher Asset Mgmt) trimmed2026-02-09−4,653 shares · 2025Q413F
- Mario Gabelli (GAMCO) added2026-02-05+1,483 shares · 2025Q413F
- −2,950 shares · 2025Q413F
- −81,532 shares · 2025Q313F
- D.E. Shaw & Co. added2025-11-14+54,483 shares · 2025Q313F
- AQR Capital Management added2025-11-14+2,568 shares · 2025Q313F
- Izzy Englander (Millennium Mgmt) trimmed2025-11-14−85,333 shares · 2025Q313F
- Steve Cohen (Point72) opened position2025-11-14+4,809 shares · 2025Q313F
- T. Rowe Price added2025-11-14+2,236 shares · 2025Q313F
- Renaissance Technologies trimmed2025-11-13−16,200 shares · 2025Q313F
- Norges Bank (Norway SWF) exited2025-11-13−570,582 shares · 2025Q313F
- −2,068 shares · 2025Q313F
- Mario Gabelli (GAMCO) trimmed2025-11-12−4,544 shares · 2025Q313F
- Ken Fisher (Fisher Asset Mgmt) added2025-11-12+21,181 shares · 2025Q313F
- Norges Bank (Norway SWF) added2025-11-12+126,305 shares · 2024Q313F
Insider activity
No insider transactions in the last 30 days.
Follow-the-investor returns
If you'd copied each holder of ACA…
Cost basis inferred from 13F share-delta history. Sorted by % return on the position they're still holding.
| Investor | First in | Cost basis | Return | Position value today |
|---|---|---|---|---|
| T. Rowe Price | 2018Q4 | $13.68 | +709.6% | $14.2M |
| Mario Gabelli (GAMCO) | 2018Q4 | $36.69 | +201.9% | $20.5M |
| Norges Bank (Norway SWF) | 2018Q4 | $67.07 | +65.2% | $71.1M |
| Jeremy Grantham (GMO) | 2020Q1 | $67.14 | +65.0% | $4.5M |
| AQR Capital Management | 2018Q4 | $70.57 | +57.0% | $1.6M |
| First Eagle Investment Management | 2021Q2 | $71.07 | +55.9% | $13.9M |
| Ray Dalio (Bridgewater Associates) | 2023Q3 | $84.26 | +31.5% | $2.5M |
| Ken Fisher (Fisher Asset Mgmt) | 2025Q2 | $88.03 | +25.9% | $11.9M |
| D.E. Shaw & Co. | 2018Q4 | $89.87 | +23.3% | $3.8M |
| Izzy Englander (Millennium Mgmt) | 2018Q4 | $95.48 | +16.0% | $5.7M |
| Steve Cohen (Point72) | 2018Q4 | $104.42 | +6.1% | $4.3M |
| Ken Griffin (Citadel Advisors) | 2019Q1 | $105.64 | +4.9% | $443K |
| Ken Griffin (Citadel Advisors) | 2019Q1 | $105.64 | +4.9% | $443K |
| Ken Griffin (Citadel Advisors) | 2019Q1 | $105.64 | +4.9% | $443K |
Who moved on this name in 2025Q4
13F transactions reported for the latest quarter, grouped by direction.
New positions3
- Norges Bank (Norway SWF)+641,695$68.2M
- Jeremy Grantham (GMO)+40,298$4.3M
- Ray Dalio (Bridgewater Associates)+22,964$2.4M
Added to6
- Ken Griffin (Citadel Advisors)+54,948$5.8M
- Steve Cohen (Point72)+33,826$3.6M
- Izzy Englander (Millennium Mgmt)+23,527$2.5M
- AQR Capital Management+2,868$305K
- Mario Gabelli (GAMCO)+1,483$158K
- T. Rowe Price+81,103$9K
Trimmed3
- D.E. Shaw & Co.−31,085$3.3M
- Ken Fisher (Fisher Asset Mgmt)−4,653$495K
- First Eagle Investment Management−2,950$314K
Exited1
- Renaissance Technologies−44,100$4.1M
Institutional ownership over time
Distinct super-investors holding this ticker · combined dollar value, by quarter.
| Quarter | Holders | Combined value |
|---|---|---|
| 2022Q1 | 10 | $15.45B |
| 2022Q2 | 9 | $12.30B |
| 2022Q3 | 11 | $19.1M |
| 2022Q4 | 13 | $459.4M |
| 2023Q1 | 13 | $554.8M |
| 2023Q2 | 14 | $680.6M |
| 2023Q3 | 16 | $628.0M |
| 2023Q4 | 12 | $710.8M |
| 2024Q1 | 12 | $742.6M |
| 2024Q2 | 15 | $724.7M |
| 2024Q3 | 12 | $125.9M |
| 2024Q4 | 11 | $116.8M |
| 2025Q1 | 10 | $35.0M |
| 2025Q2 | 13 | $113.4M |
| 2025Q3 | 12 | $63.9M |
| 2025Q4 | 14 | $150.5M |
Who owns ACA
14 super-investors · 2025Q4
Tracked stake
1.54M
shares
Combined value
$151M
% of shares outstanding
—
shares-out unknown
Quarter action mix
New3Added8Trim3
| # | Manager | Shares | Value |
|---|---|---|---|
| 1 | Norges Bank Norway SWF | 641.7K | $68M |
| 2 | Mario Gabelli GAMCO | 184.7K | $20M |
| 3 | Ken Griffin Citadel Advisors | 144.9K | $15M |
| 4 | First Eagle Investment Management | 125.5K | $13M |
| 5 | Ken Fisher Fisher Asset Mgmt | 107.5K | $11M |
| 6 | Izzy Englander Millennium Mgmt | 51.5K | $5M |
| 7 | Jeremy Grantham GMO | 40.3K | $4M |
| 8 | Steve Cohen Point72 | 38.6K | $4M |
| 9 | D.E. Shaw & Co. | 34.5K | $4M |
| 10 | Ray Dalio Bridgewater Associates | 23.0K | $2M |
| 11 | AQR Capital Management | 14.1K | $1M |
| 12 | Ken Griffin Citadel Advisors | 5.4K | $574K |
| 13 | Ken Griffin Citadel Advisors | 4.0K | $425K |
| 14 | T. Rowe Price | 128.2K | $14K |
Recent moves
20 transactions
- +2,868 · 2025Q4
- +40,298 · 2025Q4
- +33,826 · 2025Q4
- +54,948 · 2025Q4
- TRIMD.E. Shaw & Co.−31,085 · 2025Q4
- +23,527 · 2025Q4
- +81,103 · 2025Q4
- +22,964 · 2025Q4
- −44,100 · 2025Q4
- +641,695 · 2025Q4
- −4,653 · 2025Q4
- +1,483 · 2025Q4
- −2,950 · 2025Q4
- −81,532 · 2025Q3
- +54,483 · 2025Q3
- −85,333 · 2025Q3
- +2,236 · 2025Q3
- +4,809 · 2025Q3
- +2,568 · 2025Q3
- −570,582 · 2025Q3
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