Ticker · CUSIP 00404A109
Holders (tracked)
15
Combined shares
17,022,702
Combined value
$241.55M
Last close
$27.00
Quarter
2025Q4
Price · 1Y$27.00+3.09 (+12.92%)H $27.23 · L $11.68 · Avg Vol 2.9M
Tracked holders · last 8 quarters
+4 vs previous quarter over the last 8.
Price is +90.3% vs the avg quarter-end implied price across tracked holders.
SEC event timeline
18 events
- T. Rowe Price added2026-02-17+696 shares · 2025Q4Position
- Wellington Management added2026-02-17+2,350,760 shares · 2025Q4Position
- Ken Griffin (Citadel Advisors) added2026-02-17+1,024,386 shares · 2025Q4Position
- AQR Capital Management added2026-02-17+114,868 shares · 2025Q4Position
- D.E. Shaw & Co. trimmed2026-02-17−1,130,925 shares · 2025Q4Position
- Two Sigma Investments opened position2026-02-17+735,859 shares · 2025Q4Position
- Izzy Englander (Millennium Mgmt) added2026-02-17+180,787 shares · 2025Q4Position
- Steve Cohen (Point72) opened position2026-02-17+76,900 shares · 2025Q4Position
- Ray Dalio (Bridgewater Associates) added2026-02-13+80,310 shares · 2025Q4Position
- Lee Ainslie (Maverick Capital) trimmed2026-02-13−2,101,086 shares · 2025Q4Position
- AQR Capital Management trimmed2025-11-14−31,631 shares · 2025Q3Position
- Two Sigma Investments exited2025-11-14−141,182 shares · 2025Q3Position
- D.E. Shaw & Co. added2025-11-14+571,283 shares · 2025Q3Position
- Izzy Englander (Millennium Mgmt) trimmed2025-11-14−207,400 shares · 2025Q3Position
- Lee Ainslie (Maverick Capital) added2025-11-14+453,268 shares · 2025Q3Position
- T. Rowe Price added2025-11-14+5,218 shares · 2025Q3Position
- Wellington Management added2025-11-14+993,205 shares · 2025Q3Position
- +90,978 shares · 2025Q3Position
Insider activity
Last 30 days
Net (open-market)
$0
Buys
0 · $0
Sells
0 · $0
Unique insiders
2
| Date | Insider | Code | Shares | Price | Value |
|---|---|---|---|---|---|
| 04-10 | YOUNG TODD S. Chief Financial Officer · Insider | A | 58,799 | — | $0 |
| 04-10 | Farley Brian EVP, GC and Secretary · Insider | A | 37,510 | — | $0 |
Follow-the-investor returns
If you'd copied each holder of ACHC…
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 |
|---|---|---|---|---|
| D.E. Shaw & Co. | 2017Q4 | $14.48 | +86.5% | $28.8M |
| D.E. Shaw & Co. | 2017Q4 | $14.48 | +86.5% | $28.8M |
| Ken Griffin (Citadel Advisors) | 2016Q1 | $16.78 | +60.9% | $948K |
| Ken Griffin (Citadel Advisors) | 2016Q1 | $16.78 | +60.9% | $948K |
| Ken Griffin (Citadel Advisors) | 2016Q1 | $16.78 | +60.9% | $948K |
| AQR Capital Management | 2016Q1 | $19.23 | +40.4% | $7.4M |
| Two Sigma Investments | 2016Q1 | $20.45 | +32.0% | $19.9M |
| Ray Dalio (Bridgewater Associates) | 2021Q3 | $22.49 | +20.1% | $4.6M |
| Izzy Englander (Millennium Mgmt) | 2016Q1 | $24.28 | +11.2% | $1.4M |
| Izzy Englander (Millennium Mgmt) | 2016Q1 | $24.28 | +11.2% | $1.4M |
| Lee Ainslie (Maverick Capital) | 2018Q1 | $31.97 | -15.5% | $24.4M |
| Wellington Management | 2016Q1 | $50.70 | -46.7% | $317.9M |
| T. Rowe Price | 2016Q1 | $51.27 | -47.3% | $2.0M |
| Steve Cohen (Point72) | 2016Q2 | $68.48 | -60.6% | $783K |
| Steve Cohen (Point72) | 2016Q2 | $68.48 | -60.6% | $783K |
Who moved on this name in 2025Q4
Position changes reported for the latest quarter, grouped by direction.
New positions2
- Two Sigma Investments+735,859$10.4M
- Steve Cohen (Point72)+76,900$1.1M
Added to6
- Wellington Management+2,350,760$33.4M
- Ken Griffin (Citadel Advisors)+1,024,386$14.5M
- Izzy Englander (Millennium Mgmt)+180,787$2.6M
- AQR Capital Management+114,868$1.6M
- Ray Dalio (Bridgewater Associates)+80,310$1.1M
- T. Rowe Price+696$10
Trimmed2
- Lee Ainslie (Maverick Capital)−2,101,086$29.8M
- D.E. Shaw & Co.−1,130,925$16.0M
Exited0
—
Institutional ownership over time
Distinct super-investors holding this ticker · combined dollar value, by quarter.
| Quarter | Holders | Combined value |
|---|---|---|
| 2022Q1 | 17 | $1.75B |
| 2022Q2 | 12 | $1.81B |
| 2022Q3 | 14 | $1.25B |
| 2022Q4 | 14 | $1.50B |
| 2023Q1 | 13 | $1.39B |
| 2023Q2 | 13 | $1.66B |
| 2023Q3 | 13 | $799.8M |
| 2023Q4 | 12 | $1.01B |
| 2024Q1 | 16 | $1.68B |
| 2024Q2 | 12 | $1.88B |
| 2024Q3 | 14 | $1.43B |
| 2024Q4 | 14 | $256.9M |
| 2025Q1 | 12 | $468.4M |
| 2025Q2 | 11 | $307.6M |
| 2025Q3 | 11 | $387.4M |
| 2025Q4 | 15 | $241.6M |
Who owns ACHC
15 super-investors · 2025Q4
Tracked stake
17.02M
shares
Combined value
$242M
% of shares outstanding
—
shares-out unknown
Quarter action mix
New3Added9Trim3
| # | Manager | Shares | Value |
|---|---|---|---|
| 1 | Wellington Management | 11.77M | $167M |
| 2 | Ken Griffin Citadel Advisors | 1.36M | $19M |
| 3 | D.E. Shaw & Co. | 1.07M | $15M |
| 4 | Lee Ainslie Maverick Capital | 905.4K | $13M |
| 5 | Two Sigma Investments | 735.9K | $10M |
| 6 | Izzy Englander Millennium Mgmt | 428.3K | $6M |
| 7 | AQR Capital Management | 272.7K | $4M |
| 8 | Ray Dalio Bridgewater Associates | 171.3K | $2M |
| 9 | T. Rowe Price | 74.9K | $1M |
| 10 | Izzy Englander Millennium Mgmt | 50.0K | $710K |
| 11 | Steve Cohen Point72 | 47.9K | $680K |
| 12 | Ken Griffin Citadel Advisors | 46.0K | $653K |
| 13 | Ken Griffin Citadel Advisors | 35.1K | $498K |
| 14 | Steve Cohen Point72 | 29.0K | $412K |
| 15 | D.E. Shaw & Co. | 28.5K | $404K |
Recent moves
20 transactions
- TRIMD.E. Shaw & Co.−1,130,925 · 2025Q4
- +114,868 · 2025Q4
- +2,350,760 · 2025Q4
- +696 · 2025Q4
- +1,024,386 · 2025Q4
- +735,859 · 2025Q4
- +76,900 · 2025Q4
- +180,787 · 2025Q4
- +80,310 · 2025Q4
- −2,101,086 · 2025Q4
- +453,268 · 2025Q3
- −31,631 · 2025Q3
- +5,218 · 2025Q3
- +571,283 · 2025Q3
- −207,400 · 2025Q3
- +993,205 · 2025Q3
- −141,182 · 2025Q3
- +90,978 · 2025Q3
- +563,945 · 2025Q2
- +306,314 · 2025Q2
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