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Stockfacts

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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RARE short positioning

Twice-monthly snapshots of open short positions.

Settlement 2026-07-31
Short % of Float15.8%94,707,000 float shares
Days to Cover8.31,807,137 average daily volume
Open Short Position14,963,396Ultragenyx Pharmaceutical Inc.
Change vs Previous+1,528,309+11.4%

Short interest history

Twice-monthly snapshots of open short positions.

SettlementShort PositionChangeChange %Days to CoverShort % Float
Jul 31, 202614,963,396+1,528,309+11.4%8.315.8%
Jul 15, 202613,435,087-2,782,066-17.2%6.914.2%
Jun 30, 202616,217,153+1,904,394+13.3%3.617.1%

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, 2026479,7031,635949,67150.5%3
Aug 20, 2026763,8471491,494,93651.1%3
Aug 19, 2026219,5550589,07037.3%3
Aug 18, 2026204,631537617,15233.2%3
Aug 17, 2026181,7200431,94842.1%3
Aug 14, 2026209,4820521,35340.2%3
Aug 13, 2026125,18338245,55251.0%3
Aug 12, 2026214,0322433,49249.4%3
Aug 11, 2026376,5830791,82747.6%3
Aug 10, 2026380,3860819,91846.4%3
Aug 7, 2026503,92901,462,93334.4%3
Aug 6, 2026314,606141573,52754.9%3
Aug 5, 2026568,1322271,098,75351.7%3
Aug 4, 2026211,67615633,34033.4%3
Aug 3, 2026269,7111,484948,20528.4%3
Jul 31, 2026234,72324442,05853.1%3
Jul 30, 2026322,9420642,91150.2%3
Jul 29, 2026423,6110653,01464.9%3
Jul 28, 2026387,2570614,49563.0%3
Jul 27, 2026333,2250535,65462.2%3
Jul 24, 2026275,7940540,24351.0%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.