Ticker · CUSIP 00509G209
Holders (tracked)
6
Combined shares
1,558,912
Combined value
$3.29M
Last close
$2.82
Quarter
2025Q4
Price · 1Y$2.82+1.92 (+212.99%)H $3.37 · L $0.90 · Avg Vol 465K
Position opened
Tracked holders · last 8 quarters
+1 vs previous quarter over the last 8.
Price is +33.6% vs the avg quarter-end implied price across tracked holders.
SEC event timeline
9 events
- Steve Cohen (Point72) opened position2026-02-17+36,365 shares · 2025Q4Position
- Ken Griffin (Citadel Advisors) trimmed2026-02-17−148,825 shares · 2025Q4Position
- Two Sigma Investments trimmed2026-02-17−56,225 shares · 2025Q4Position
- Izzy Englander (Millennium Mgmt) trimmed2026-02-17−17,573 shares · 2025Q4Position
- Renaissance Technologies trimmed2026-02-12−161,192 shares · 2025Q4Position
- AQR Capital Management exited2025-11-14−46,292 shares · 2025Q3Position
- Two Sigma Investments trimmed2025-11-14−1,339 shares · 2025Q3Position
- Izzy Englander (Millennium Mgmt) trimmed2025-11-14−1,348,404 shares · 2025Q3Position
- Renaissance Technologies added2025-11-13+337,704 shares · 2025Q3Position
Insider activity
No insider transactions in the last 30 days.
Follow-the-investor returns
If you'd copied each holder of ABOS…
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 |
|---|---|---|---|---|
| Ken Griffin (Citadel Advisors) | 2021Q4 | $1.71 | +64.9% | $76K |
| Ken Griffin (Citadel Advisors) | 2021Q4 | $1.71 | +64.9% | $76K |
| Renaissance Technologies | 2021Q4 | $2.29 | +23.1% | $1.2M |
| Steve Cohen (Point72) | 2022Q1 | $2.31 | +22.3% | $103K |
| Izzy Englander (Millennium Mgmt) | 2021Q4 | $2.78 | +1.3% | $1.6M |
| Two Sigma Investments | 2022Q2 | $3.40 | -17.0% | $404K |
Who moved on this name in 2025Q4
Position changes reported for the latest quarter, grouped by direction.
New positions1
- Steve Cohen (Point72)+36,365$77K
Added to0
—
Trimmed4
- Renaissance Technologies−161,192$340K
- Ken Griffin (Citadel Advisors)−148,825$314K
- Two Sigma Investments−56,225$119K
- Izzy Englander (Millennium Mgmt)−17,573$37K
Exited0
—
Institutional ownership over time
Distinct super-investors holding this ticker · combined dollar value, by quarter.
| Quarter | Holders | Combined value |
|---|---|---|
| 2022Q1 | 5 | $16.1M |
| 2022Q2 | 5 | $15.8M |
| 2022Q3 | 6 | $20.1M |
| 2022Q4 | 7 | $12.0M |
| 2023Q1 | 8 | $6.5M |
| 2023Q2 | 9 | $9.8M |
| 2023Q3 | 8 | $10.8M |
| 2023Q4 | 6 | $8.2M |
| 2024Q1 | 8 | $17.2M |
| 2024Q2 | 9 | $14.5M |
| 2024Q3 | 7 | $8.4M |
| 2024Q4 | 7 | $3.4M |
| 2025Q1 | 7 | $1.9M |
| 2025Q2 | 5 | $2.9M |
| 2025Q3 | 5 | $3.2M |
| 2025Q4 | 6 | $3.3M |
Who owns ABOS
6 super-investors · 2025Q4
Tracked stake
1.56M
shares
Combined value
$3M
% of shares outstanding
—
shares-out unknown
Quarter action mix
New1Trim5
| # | Manager | Shares | Value |
|---|---|---|---|
| 1 | Izzy Englander Millennium Mgmt | 584.1K | $1M |
| 2 | Renaissance Technologies | 423.1K | $893K |
| 3 | Ken Griffin Citadel Advisors | 345.3K | $729K |
| 4 | Two Sigma Investments | 143.2K | $302K |
| 5 | Steve Cohen Point72 | 36.4K | $77K |
| 6 | Ken Griffin Citadel Advisors | 26.8K | $57K |
Recent moves
20 transactions
- +36,365 · 2025Q4
- −56,225 · 2025Q4
- −148,825 · 2025Q4
- −17,573 · 2025Q4
- −161,192 · 2025Q4
- −1,339 · 2025Q3
- −46,292 · 2025Q3
- −1,348,404 · 2025Q3
- +337,704 · 2025Q3
- +4,557 · 2025Q2
- +814,898 · 2025Q2
- −31,508 · 2025Q2
- SOLDT. Rowe Price−13,616 · 2025Q2
- −10,112 · 2025Q2
- −209,523 · 2025Q1
- −68,975 · 2025Q1
- +41,735 · 2025Q1
- −513 · 2025Q1
- TRIMT. Rowe Price−836,003 · 2024Q4
- −490,008 · 2024Q4
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