Ticker · CUSIP 003881307
Holders (tracked)
6
Combined shares
1,821,127
Combined value
$6.81M
Last close
$5.02
Quarter
2025Q4
Price · 1Y$5.02+2.13 (+73.70%)H $5.13 · L $2.89 · Avg Vol 229K
Position opened
Tracked holders · last 8 quarters
+2 vs previous quarter over the last 8.
Price is +34.2% vs the avg quarter-end implied price across tracked holders.
SEC event timeline
5 events
- Ken Griffin (Citadel Advisors) trimmed2026-02-17−118,961 shares · 2025Q4Position
- AQR Capital Management added2026-02-17+19,590 shares · 2025Q4Position
- Renaissance Technologies trimmed2026-02-12−130,700 shares · 2025Q4Position
- AQR Capital Management added2025-11-14+7,459 shares · 2025Q3Position
- Renaissance Technologies trimmed2025-11-13−33,086 shares · 2025Q3Position
Insider activity
No insider transactions in the last 30 days.
Follow-the-investor returns
If you'd copied each holder of ACTG…
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) | 2016Q1 | $3.73 | +34.4% | $58K |
| Ken Griffin (Citadel Advisors) | 2016Q1 | $3.73 | +34.4% | $58K |
| Ken Griffin (Citadel Advisors) | 2016Q1 | $3.73 | +34.4% | $58K |
| AQR Capital Management | 2017Q1 | $4.02 | +24.9% | $265K |
| T. Rowe Price | 2016Q2 | $4.53 | +10.9% | $94K |
| Renaissance Technologies | 2016Q1 | $4.60 | +9.1% | $7.0M |
Who moved on this name in 2025Q4
Position changes reported for the latest quarter, grouped by direction.
New positions0
—
Added to1
- AQR Capital Management+19,590$73K
Trimmed2
- Renaissance Technologies−130,700$489K
- Ken Griffin (Citadel Advisors)−118,961$445K
Exited0
—
Institutional ownership over time
Distinct super-investors holding this ticker · combined dollar value, by quarter.
| Quarter | Holders | Combined value |
|---|---|---|
| 2022Q1 | 8 | $25.0M |
| 2022Q2 | 9 | $19.6M |
| 2022Q3 | 8 | $12.5M |
| 2022Q4 | 10 | $13.7M |
| 2023Q1 | 8 | $12.3M |
| 2023Q2 | 7 | $18.8M |
| 2023Q3 | 8 | $15.2M |
| 2023Q4 | 8 | $16.5M |
| 2024Q1 | 7 | $21.9M |
| 2024Q2 | 8 | $21.4M |
| 2024Q3 | 6 | $8.1M |
| 2024Q4 | 6 | $7.6M |
| 2025Q1 | 6 | $5.6M |
| 2025Q2 | 5 | $7.9M |
| 2025Q3 | 4 | $6.6M |
| 2025Q4 | 6 | $6.8M |
Who owns ACTG
6 super-investors · 2025Q4
Tracked stake
1.82M
shares
Combined value
$7M
% of shares outstanding
—
shares-out unknown
Quarter action mix
Added1Trim4Held1
| # | Manager | Shares | Value |
|---|---|---|---|
| 1 | Renaissance Technologies | 1.40M | $5M |
| 2 | Ken Griffin Citadel Advisors | 331.1K | $1M |
| 3 | AQR Capital Management | 52.9K | $198K |
| 4 | T. Rowe Price | 18.7K | $71K |
| 5 | Ken Griffin Citadel Advisors | 11.6K | $43K |
| 6 | Ken Griffin Citadel Advisors | 11.5K | $43K |
Recent moves
20 transactions
- −118,961 · 2025Q4
- +19,590 · 2025Q4
- −130,700 · 2025Q4
- +7,459 · 2025Q3
- −33,086 · 2025Q3
- TRIMT. Rowe Price−35,533 · 2025Q2
- +14,924 · 2025Q2
- −19,214 · 2025Q2
- +10,889 · 2025Q1
- −20,175 · 2025Q1
- −17,100 · 2025Q1
- +872 · 2025Q1
- −7,065 · 2024Q4
- +2,581 · 2024Q4
- −47,400 · 2024Q4
- −41,596 · 2024Q3
- −37,232 · 2024Q3
- SOLDD.E. Shaw & Co.−25,852 · 2023Q4
- TRIMT. Rowe Price−12,036 · 2024Q3
- +132,557 · 2024Q3
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