- Quarter end
- 31 Dec 2025
- the date the book describes
- Filed
- 27 Oct 2026
- latest of these filings; the earliest 10 Feb 2026
- Managers listing it
- 20
- 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
- 35,782,630
- combined, among listed positions
- Reported value
- $74m
- combined, at the quarter end
Among the 92 comparable managers: 13 buyers (opened or added shares) and 6 sellers (trimmed or exited), at least, among listed positions. Their net change in shares was -1,622,364.
Managers listing CERS in Q4 2025
20 of 20 holders
Largest increases and reductions, by shares
Increases
- Two Sigma Investments LPexisting position · 1,857,110 shares now+712,678
- Two Sigma Advisers LPexisting position · 1,397,900 shares now+423,900
- Acadian Asset Management LLCexisting position · 3,278,111 shares now+386,440
- Arrowstreet Capital LPnew position · 255,961 shares now+255,961
- Fidelity (FMR LLC)existing position · 1,033,272 shares now+203,099
Reductions
- Millennium Management LLCexisting position · 967,694 shares now-2,502,368
- ARK Investment Management LLCexisting position · 18,200,204 shares now-649,984
- AQR Capital Management LLCexisting position · 2,003,198 shares now-450,832
- Renaissance Technologies LLCexisting position · 498,000 shares now-341,500
- Jane Street Group LLCexisting position · 253,570 shares now-160,683
New positions and exits
New (3)
Exited (0)
No exit shown by a manager’s own filing.
Ownership over time
Tracked managers listing it, at least.
| Quarter | Holders | Reported value | Buyers | Sellers |
|---|---|---|---|---|
| Q4 2016 | 1 | $2.9m | n.a. | n.a. |
| Q1 2017 | 1 | $3.3m | n.a. | n.a. |
| Q2 2017 | 1 | $4.2m | n.a. | n.a. |
| Q3 2017 | 1 | $7.3m | n.a. | n.a. |
| Q4 2017 | 1 | $12m | n.a. | n.a. |
| Q1 2018 | 2 | $30m | n.a. | n.a. |
| Q2 2018 | 2 | $39m | n.a. | n.a. |
| Q3 2018 | 2 | $47m | n.a. | n.a. |
| Q4 2018 | 2 | $35m | n.a. | n.a. |
| Q1 2019 | 1 | $48m | n.a. | n.a. |
| Q2 2019 | 1 | $48m | n.a. | n.a. |
| Q3 2019 | 1 | $45m | n.a. | n.a. |
| Q4 2019 | 1 | $40m | n.a. | n.a. |
| Q1 2020 | 1 | $65m | n.a. | n.a. |
| Q2 2020 | 1 | $144m | n.a. | n.a. |
| Q3 2020 | 1 | $188m | n.a. | n.a. |
| Q4 2020 | 3 | $205m | n.a. | n.a. |
| Q1 2021 | 3 | $154m | n.a. | n.a. |
| Q2 2021 | 2 | $124m | n.a. | n.a. |
| Q3 2021 | 2 | $104m | n.a. | n.a. |
| Q4 2021 | 2 | $107m | n.a. | n.a. |
| Q1 2022 | 3 | $90m | n.a. | n.a. |
| Q2 2022 | 3 | $86m | n.a. | n.a. |
| Q3 2022 | 3 | $61m | n.a. | n.a. |
| Q4 2022 | 3 | $59m | n.a. | n.a. |
| Q1 2023 | 2 | $66m | n.a. | n.a. |
| Q2 2023 | 1 | $51m | n.a. | n.a. |
| Q3 2023 | 1 | $33m | n.a. | n.a. |
| Q4 2023 | 1 | $45m | 1 | 0 |
| Q1 2024 | 1 | $41m | 1 | 0 |
| Q2 2024 | 1 | $35m | 0 | 1 |
| Q3 2024 | 1 | $32m | 0 | 1 |
| Q4 2024 | 1 | $32m | 1 | 0 |
| Q1 2025 | 1 | $29m | 0 | 1 |
| Q2 2025 | 1 | $27m | 0 | 1 |
| Q3 2025 | 1 | $30m | 0 | 1 |
| Q4 2025 | 1 | $37m | 13 | 6 |
| Q1 2026 | 1 | $35m | 10 | 9 |
| Q2 2026 | 1 | $52m | 13 | 7 |
Compare with…
Holders over time, buyers and sellers, and the managers holding both, side by side for up to four stocks.
CERS and LLY →CERS and JNJ →CERS and VRTX →Choose a stock to compare with CERS →
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 CERS, latest filings →Back to the 13F Explorer →