Ticker · CUSIP 002120202
Holders (tracked)
5
Combined shares
1,651,389
Combined value
$1.26M
Last close
—
Quarter
2025Q4
Tracked holders · last 8 quarters
-2 vs previous quarter over the last 8.
SEC event timeline
13 events
- Ken Griffin (Citadel Advisors) trimmed2026-02-17−458,000 shares · 2025Q413F
- D.E. Shaw & Co. exited2026-02-17−83,312 shares · 2025Q413F
- Two Sigma Investments added2026-02-17+243,443 shares · 2025Q413F
- Izzy Englander (Millennium Mgmt) exited2026-02-17−1,890,921 shares · 2025Q413F
- Wellington Management exited2026-02-17−289,231 shares · 2025Q413F
- AQR Capital Management opened position2026-02-17+769,820 shares · 2025Q413F
- T. Rowe Price added2025-11-14+2,601 shares · 2025Q313F
- Steve Cohen (Point72) exited2025-11-14−988,677 shares · 2025Q313F
- Two Sigma Investments added2025-11-14+179,672 shares · 2025Q313F
- Wellington Management added2025-11-14+74,303 shares · 2025Q313F
- Izzy Englander (Millennium Mgmt) added2025-11-14+290,721 shares · 2025Q313F
- D.E. Shaw & Co. added2025-11-14+68,026 shares · 2025Q313F
- Renaissance Technologies exited2025-11-13−518,355 shares · 2025Q313F
Insider activity
No insider transactions in the last 30 days.
Who moved on this name in 2025Q4
13F transactions reported for the latest quarter, grouped by direction.
New positions1
- AQR Capital Management+769,820$603K
Added to1
- Two Sigma Investments+243,443$191K
Trimmed1
- Ken Griffin (Citadel Advisors)−458,000$359K
Exited3
- Izzy Englander (Millennium Mgmt)−1,890,921$1.4M
- Wellington Management−289,231$209K
- D.E. Shaw & Co.−83,312$60K
Institutional ownership over time
Distinct super-investors holding this ticker · combined dollar value, by quarter.
| Quarter | Holders | Combined value |
|---|---|---|
| 2022Q1 | 7 | $4.6M |
| 2022Q2 | 5 | $1.8M |
| 2022Q3 | 4 | $2K |
| 2022Q4 | 7 | $1.0M |
| 2023Q1 | 6 | $1.1M |
| 2023Q2 | 7 | $5.4M |
| 2023Q3 | 7 | $5.3M |
| 2023Q4 | 7 | $4.6M |
| 2024Q1 | 7 | $6.5M |
| 2024Q2 | 6 | $7.2M |
| 2024Q3 | 5 | $3.9M |
| 2024Q4 | 7 | $21.4M |
| 2025Q1 | 8 | $16.6M |
| 2025Q2 | 11 | $19.7M |
| 2025Q3 | 7 | $2.4M |
| 2025Q4 | 5 | $1.3M |
Who owns ATYR
5 super-investors · 2025Q4
Tracked stake
1.65M
shares
Combined value
$1M
% of shares outstanding
—
shares-out unknown
Quarter action mix
New1Added1Trim2Held1
| # | Manager | Shares | Value |
|---|---|---|---|
| 1 | AQR Capital Management | 769.8K | $603K |
| 2 | Two Sigma Investments | 454.4K | $356K |
| 3 | Ken Griffin Citadel Advisors | 253.8K | $199K |
| 4 | Ken Griffin Citadel Advisors | 127.2K | $100K |
| 5 | T. Rowe Price | 46.1K | $36 |
Recent moves
20 transactions
- −289,231 · 2025Q4
- −1,890,921 · 2025Q4
- +769,820 · 2025Q4
- +243,443 · 2025Q4
- −458,000 · 2025Q4
- SOLDD.E. Shaw & Co.−83,312 · 2025Q4
- +74,303 · 2025Q3
- +68,026 · 2025Q3
- +179,672 · 2025Q3
- −988,677 · 2025Q3
- +2,601 · 2025Q3
- +290,721 · 2025Q3
- −518,355 · 2025Q3
- +9,089 · 2025Q2
- −1,855,422 · 2025Q2
- +15,286 · 2025Q2
- +1,159 · 2025Q2
- +43,525 · 2025Q2
- +46,186 · 2025Q2
- +38,400 · 2025Q2
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