Castle Biosciences, Inc. (CSTL) short interest & options flow
NASDAQCSTL cost to borrow surges 173% over one week to 0.93%, though remains at low absolute levels; short interest holds at 5.79% of float with high availability.
- Market cap
- $1.00B
- Next earnings
- 26 Feb 2027
Key data as of 8 Nov 2026

Latest signals on CSTL
- Cost to Borrow
CSTL cost to borrow surges 173% over one week to 0.93%, though remains at low absolute levels; short interest holds at 5.79% of float with high availability.
CSTL news and analysis
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