- Quarter end
- 31 Dec 2025
- the date the book describes
- Filed
- 17 Feb 2026
- latest of these filings; the earliest 5 Feb 2026
- Managers listing it
- 16
- at least, of 95 tracked, among listed positions
- Comparable managers
- 92
- filed both Q3 2025 and Q4 2025; 1 listed it in both
- Shares listed
- 1,969,455
- combined, among listed positions
- Reported value
- $43m
- combined, at the quarter end
Among the 92 comparable managers: 10 buyers (opened or added shares) and 7 sellers (trimmed or exited), at least, among listed positions. Their net change in shares was +337,789.
Managers listing ATEX in Q4 2025
16 of 16 holders
Largest increases and reductions, by shares
Increases
- Millennium Management LLCexisting position · 439,946 shares now+404,838
- Jane Street Group LLCexisting position · 159,014 shares now+116,731
- GAMCO Investors Incexisting position · 422,470 shares now+102,400
- Squarepoint Ops LLCexisting position · 53,117 shares now+33,656
- Arrowstreet Capital LPnew position · 33,401 shares now+33,401
Reductions
- Fidelity (FMR LLC)existing position · 51,044 shares now-236,745
- Balyasny Asset Management LLCexisting position · 17,740 shares now-75,536
- D. E. Shaw & Co.existing position · 61,765 shares now-69,310
- Tudor Investment Corpexisting position · 124,943 shares now-3,738
- Citadel Advisors LLCexisting position · 108,380 shares now-2,714
New positions and exits
New (2)
Exited (2)
- AQR Capital Management LLCwas $418k
- Quantbot Technologies LPwas $57k
Ownership over time
Tracked managers listing it, at least.
| Quarter | Holders | Reported value | Buyers | Sellers |
|---|---|---|---|---|
| Q4 2019 | 1 | $16m | n.a. | n.a. |
| Q1 2020 | 1 | $24m | n.a. | n.a. |
| Q2 2020 | 2 | $37m | n.a. | n.a. |
| Q3 2020 | 2 | $28m | n.a. | n.a. |
| Q4 2020 | 2 | $11m | n.a. | n.a. |
| Q1 2021 | 4 | $18m | n.a. | n.a. |
| Q2 2021 | 4 | $16m | n.a. | n.a. |
| Q3 2021 | 4 | $17m | n.a. | n.a. |
| Q4 2021 | 4 | $17m | n.a. | n.a. |
| Q1 2022 | 4 | $17m | n.a. | n.a. |
| Q2 2022 | 2 | $4.5m | n.a. | n.a. |
| Q3 2022 | 2 | $4.4m | n.a. | n.a. |
| Q4 2022 | 2 | $3.9m | n.a. | n.a. |
| Q1 2023 | 1 | $5k | n.a. | n.a. |
| Q2 2023 | 1 | $1.8m | n.a. | n.a. |
| Q3 2023 | 1 | $2.1m | n.a. | n.a. |
| Q4 2023 | 1 | $2.5m | 1 | 0 |
| Q1 2024 | 1 | $3.1m | 1 | 0 |
| Q2 2024 | 1 | $4.3m | 1 | 0 |
| Q3 2024 | 2 | $4.5m | 1 | 1 |
| Q4 2024 | 2 | $5.0m | 1 | 1 |
| Q1 2025 | 1 | $7.4m | 1 | 0 |
| Q2 2025 | 1 | $7.0m | 1 | 0 |
| Q3 2025 | 1 | $6.9m | 1 | 0 |
| Q4 2025 | 1 | $9.2m | 10 | 7 |
| Q1 2026 | 1 | $16m | 10 | 10 |
| Q2 2026 | 3 | $112m | 14 | 9 |
Compare with…
Holders over time, buyers and sellers, and the managers holding both, side by side for up to four stocks.
ATEX and NFLX →ATEX and TMUS →ATEX and CMCSA →Choose a stock to compare with ATEX →
How much of the picture this is
A 13F is a manager’s long US-listed equity book at a quarter end, filed up to 45 days later. It shows no shorts, cash, bonds or performance, and it is never today’s portfolio. Large books are listed to their largest positions, so a manager missing from this table may still hold a small position below that line. These are 95 tracked managers, not the institutional market.
Which funds own ATEX, latest filings →Back to the 13F Explorer →