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Spero Therapeutics, Inc. (SPRO) short interest & options flow

NASDAQ
Latest pulse14 May 2026

SPRO short interest fell 22% over the past week to 1.74% of float, though shares shorted ticked up 4.2% in the last day to 978k.

$1.01-5.61% 1d-2.88% 1w-15.83% 1mClose: 10 Nov 2026
Short interest % of float
Low and dropping
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Cost to borrow
Low
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Availability
High
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Market cap
$59M
Next earnings
13 Nov 2026
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Key data as of 12 Nov 2026

ORTEX chart of Spero Therapeutics, Inc. (SPRO) share price and short interest (% of free float), six months to November 10, 2026

Latest signals on SPRO

  • Short Interest

    SPRO short interest fell 22% over the past week to 1.74% of float, though shares shorted ticked up 4.2% in the last day to 978k.

SPRO news and analysis

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