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Castle Biosciences, Inc. (CSTL) short interest & options flow

NASDAQ
Latest pulse9 Sept 2026

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.

$32.52-4.91% 1d-12.49% 1w-2.52% 1mClose: 6 Nov 2026
Cost to borrow
Low
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Availability
High
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Market cap
$1.00B
Next earnings
26 Feb 2027
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Key data as of 8 Nov 2026

ORTEX chart of Castle Biosciences, Inc. (CSTL) share price and short interest (% of free float), six months to November 6, 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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