CSTL in the 13F filings
Castle Biosciences Inc · CUSIP 14843C105
- Quarter end
- 30 Sep 2026
- the date the book describes
- Filed
- 9 Nov 2026
- latest of these filings; the earliest 9 Nov 2026
- Managers listing it
- 2
- at least, of 95 tracked, among listed positions
- Comparable managers
- 5
- filed both Q2 2026 and Q3 2026; 1 listed it in both
- Shares listed
- 982,195
- combined, among listed positions
- Reported value
- $35m
- combined, at the quarter end
Among the 5 comparable managers: 1 buyer (opened or added shares) and 1 seller (trimmed or exited), at least, among listed positions. Their net change in shares was +63,527.
Managers listing CSTL in Q3 2026
2 of 2 holders
| Action | Filing | |||||
|---|---|---|---|---|---|---|
| Acadian Asset Management LLC | 881,863 | $31m | under 0.1% | Trimmed | -36,805 | 9 Nov 2026 (the filing on sec.gov) |
| Squarepoint Ops LLC | 100,332 | $3.6m | under 0.1% | New | new | 9 Nov 2026 (the filing on sec.gov) |
Largest increases and reductions, by shares
Increases
- Squarepoint Ops LLCnew position · 100,332 shares now+100,332
Reductions
- Acadian Asset Management LLCexisting position · 881,863 shares now-36,805
New positions and exits
New (1)
- Squarepoint Ops LLC$3.6m
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 |
|---|---|---|---|---|
| Q3 2019 | 1 | $3.0m | n.a. | n.a. |
| Q4 2019 | 1 | $7.1m | n.a. | n.a. |
| Q1 2020 | 1 | $6.6m | n.a. | n.a. |
| Q2 2020 | 1 | $18m | n.a. | n.a. |
| Q3 2020 | 2 | $27m | n.a. | n.a. |
| Q4 2020 | 1 | $139m | n.a. | n.a. |
| Q1 2021 | 2 | $179m | n.a. | n.a. |
| Q2 2021 | 3 | $187m | n.a. | n.a. |
| Q3 2021 | 3 | $138m | n.a. | n.a. |
| Q4 2021 | 3 | $73m | n.a. | n.a. |
| Q1 2022 | 3 | $80m | n.a. | n.a. |
| Q2 2022 | 2 | $5k | n.a. | n.a. |
| Q3 2022 | 1 | $6k | n.a. | n.a. |
| Q4 2022 | 1 | $5k | n.a. | n.a. |
| Q1 2023 | 1 | $5k | n.a. | n.a. |
| Q1 2024 | 1 | $4.7m | 1 | 0 |
| Q2 2024 | 1 | $6.1m | 1 | 0 |
| Q3 2024 | 3 | $12m | 3 | 0 |
| Q4 2024 | 1 | $11m | 1 | 1 |
| Q1 2025 | 1 | $14m | 1 | 0 |
| Q2 2025 | 1 | $11m | 0 | 1 |
| Q3 2025 | 1 | $10m | 0 | 1 |
| Q4 2025 | 2 | $16m | 18 | 8 |
| Q1 2026 | 1 | $12m | 16 | 8 |
| Q2 2026 | 1 | $22m | 11 | 11 |
| Q3 2026 | 1 | $31m | 1 | 1 |
Compare with…
Holders over time, buyers and sellers, and the managers holding both, side by side for up to four stocks.
CSTL and UNH →CSTL and ELV →CSTL and CI →Choose a stock to compare with CSTL →
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 CSTL, latest filings →Back to the 13F Explorer →