Ticker · CUSIP 043113208
Holders (tracked)
4
Combined shares
390,845
Combined value
$12.35M
Last close
—
Quarter
2025Q4
Tracked holders · last 8 quarters
Flat over the last 8 quarters.
SEC event timeline
9 events
- Ken Griffin (Citadel Advisors) trimmed2026-02-17−16,775 shares · 2025Q4Position
- Two Sigma Investments trimmed2026-02-17−4,451 shares · 2025Q4Position
- Izzy Englander (Millennium Mgmt) added2026-02-17+1,891 shares · 2025Q4Position
- Renaissance Technologies added2026-02-12+400 shares · 2025Q4Position
- −19,225 shares · 2025Q3Position
- D.E. Shaw & Co. exited2025-11-14−18,149 shares · 2025Q3Position
- Two Sigma Investments trimmed2025-11-14−2,482 shares · 2025Q3Position
- Izzy Englander (Millennium Mgmt) trimmed2025-11-14−34,816 shares · 2025Q3Position
- Renaissance Technologies added2025-11-13+19,800 shares · 2025Q3Position
Insider activity
No insider transactions in the last 30 days.
Who moved on this name in 2025Q4
Position changes reported for the latest quarter, grouped by direction.
New positions0
—
Added to2
- Izzy Englander (Millennium Mgmt)+1,891$60K
- Renaissance Technologies+400$13K
Trimmed2
- Ken Griffin (Citadel Advisors)−16,775$530K
- Two Sigma Investments−4,451$141K
Exited0
—
Institutional ownership over time
Distinct super-investors holding this ticker · combined dollar value, by quarter.
| Quarter | Holders | Combined value |
|---|---|---|
| 2022Q1 | 4 | $61.7M |
| 2022Q2 | 4 | $68.8M |
| 2022Q3 | 7 | $58.1M |
| 2022Q4 | 6 | $69.5M |
| 2023Q1 | 6 | $65.7M |
| 2023Q2 | 6 | $56.6M |
| 2023Q3 | 5 | $54.6M |
| 2023Q4 | 5 | $55.6M |
| 2024Q1 | 5 | $53.5M |
| 2024Q2 | 6 | $43.4M |
| 2024Q3 | 6 | $19.0M |
| 2024Q4 | 6 | $16.4M |
| 2025Q1 | 6 | $18.9M |
| 2025Q2 | 6 | $16.4M |
| 2025Q3 | 4 | $13.4M |
| 2025Q4 | 4 | $12.4M |
Who owns ARTNA
4 super-investors · 2025Q4
Tracked stake
390.8K
shares
Combined value
$12M
% of shares outstanding
—
shares-out unknown
Quarter action mix
Added2Trim2
| # | Manager | Shares | Value |
|---|---|---|---|
| 1 | Renaissance Technologies | 278.5K | $9M |
| 2 | Two Sigma Investments | 56.5K | $2M |
| 3 | Izzy Englander Millennium Mgmt | 41.7K | $1M |
| 4 | Ken Griffin Citadel Advisors | 14.2K | $448K |
Recent moves
20 transactions
- +1,891 · 2025Q4
- −16,775 · 2025Q4
- −4,451 · 2025Q4
- +400 · 2025Q4
- −19,225 · 2025Q3
- SOLDD.E. Shaw & Co.−18,149 · 2025Q3
- −2,482 · 2025Q3
- −34,816 · 2025Q3
- +19,800 · 2025Q3
- −22,580 · 2025Q2
- −4,297 · 2025Q2
- TRIMD.E. Shaw & Co.−7,303 · 2025Q2
- +2,031 · 2025Q2
- −10,900 · 2025Q2
- −21,656 · 2025Q1
- +8,068 · 2025Q1
- +4,934 · 2025Q1
- +29,375 · 2025Q1
- −7,781 · 2025Q1
- −38,326 · 2024Q4
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