CSTL US Equity
Castle Biosciences IncHealth Care · Services-Medical Laboratories · CIK 1447362 · FY ends Dec 31$32.32
+3.29 (+11.33%)
USD · as of 2026-08-19 · marketstack
Short interest· FINRA consolidated · settlement 2026-07-31
6 settlement cycles| Shares short | 1.6M |
| % of shares out | 5.1% |
| Days to cover | 3.2 |
| Δ vs 2026-07-15 | +9.9% |
bars = shares short · line = days to cover (own scale)
| Settlement | Shares short | Δ vs prior | Avg daily volume | Days to cover |
|---|
| 2026-07-31 | 1,561,988 | +9.9% | 491,979 | 3.2 |
| 2026-07-15 | 1,421,793 | -4.7% | 251,097 | 5.7 |
| 2026-06-30 | 1,491,750 | +0.5% | 469,005 | 3.2 |
| 2026-06-15 | 1,485,061 | +0.0% | 284,222 | 5.2 |
| 2026-05-29 | 1,484,771 | +4.9% | 393,031 | 3.8 |
| 2026-05-15 | 1,415,745 | -0.9% | 633,871 | 2.2 |
FINRA Rule 4560 · twice monthly, published ~a week later.
Output of a disclosed model — assumptions may be wrong. Research, not investment advice. See the Disclaimer.
