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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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CERS short positioning

Twice-monthly snapshots of open short positions.

Settlement 2026-07-31
Short % of Float7.7%194,850,000 float shares
Days to Cover5.72,619,098 average daily volume
Open Short Position14,960,162Cerus Corporation Common Stock
Change vs Previous+1,271,473+9.3%

Short interest history

Twice-monthly snapshots of open short positions.

SettlementShort PositionChangeChange %Days to CoverShort % Float
Jul 31, 202614,960,162+1,271,473+9.3%5.77.7%
Jul 15, 202613,688,689+950,293+7.5%5.57.0%
Jun 30, 202612,738,396-6,958,489-35.3%4.16.5%

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, 2026404,851228847,70947.8%3
Aug 20, 2026617,9514521,239,82549.8%3
Aug 19, 2026354,741516668,36353.1%3
Aug 18, 2026531,901330950,10256.0%3
Aug 17, 2026726,5644,5611,168,75062.2%3
Aug 14, 2026511,8780827,51561.9%2
Aug 13, 2026765,0972,7001,343,86756.9%3
Aug 12, 2026567,2200799,82370.9%3
Aug 11, 2026884,18091,117,92179.1%2
Aug 10, 2026758,9991131,033,45073.4%3
Aug 7, 2026773,95712,2311,363,42756.8%3
Aug 6, 2026735,087761,067,37868.9%3
Aug 5, 2026944,3522311,457,74664.8%3
Aug 4, 20261,106,5152532,413,91145.8%3
Aug 3, 20261,478,131124,5652,377,34762.2%3
Jul 31, 20263,999,216286,6814,931,42781.1%3
Jul 30, 2026298,8220669,33544.6%3
Jul 29, 2026507,8240854,37359.4%3
Jul 28, 2026351,637120546,82264.3%3
Jul 27, 2026159,7650479,96933.3%3
Jul 24, 2026331,08001,061,56931.2%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.