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EOD US-equity data for investors and AI agents

Data is end-of-day, not real-time, and not investment advice

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PEN short positioning

Twice-monthly snapshots of open short positions.

Settlement 2026-07-31
Short % of Float4.8%38,298,700 float shares
Days to Cover4.2438,245 average daily volume
Open Short Position1,836,046Penumbra, Inc.
Change vs Previous-287,711-13.6%

Short interest history

Twice-monthly snapshots of open short positions.

SettlementShort PositionChangeChange %Days to CoverShort % Float
Jul 31, 20261,836,046-287,711-13.6%4.24.8%
Jul 15, 20262,123,757+86,137+4.2%6.35.5%
Jun 30, 20262,037,620+50,701+2.5%5.15.3%

Short interest is an open-position snapshot published twice monthly. It is not daily short-sale volume.

Daily off-exchange short volume

FINRA-reported short-sale transaction flow for the last 30 calendar days.

Trade DateShort VolumeShort ExemptFINRA TotalShort Volume %Facilities
Aug 21, 202631,0077962,69849.5%3
Aug 20, 202635,732057,75261.9%3
Aug 19, 202657,01233151,54237.6%3
Aug 18, 202618,131039,92745.4%3
Aug 17, 202631,0267958,12653.4%3
Aug 14, 202617,47225553,43732.7%3
Aug 13, 202630,369052,18658.2%3
Aug 12, 202636,928096,12038.4%2
Aug 11, 202633,697059,92256.2%3
Aug 10, 202625,9115054,41747.6%3
Aug 7, 202628,480072,35639.4%3
Aug 6, 202639,058082,22947.5%3
Aug 5, 202637,273196,44438.6%3
Aug 4, 202679,2912160,92049.3%3
Aug 3, 202646,4334119,92738.7%3
Jul 31, 202640,1440112,19035.8%3
Jul 30, 202643,6880101,24443.2%3
Jul 29, 202629,6043101,18029.3%3
Jul 28, 202633,4091111,94729.8%3
Jul 27, 202625,249288,83128.4%3

Daily short volume is transaction flow reported through FINRA facilities. It does not measure open short positions and is not consolidated exchange-wide volume.