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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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UPB short positioning

Twice-monthly snapshots of open short positions.

Settlement 2026-07-31
Short % of Float8.5%42,811,200 float shares
Days to Cover7.5486,961 average daily volume
Open Short Position3,648,558Upstream Bio, Inc. Common Stoc
Change vs Previous+30,407+0.8%

Short interest history

Twice-monthly snapshots of open short positions.

SettlementShort PositionChangeChange %Days to CoverShort % Float
Jul 31, 20263,648,558+30,407+0.8%7.58.5%
Jul 15, 20263,618,151-487,479-11.9%8.28.5%
Jun 30, 20264,105,630+207,401+5.3%5.79.6%

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, 202646,3717,442185,54125.0%3
Aug 20, 202681,7346,975247,07733.1%3
Aug 19, 202674,5455,793236,57231.5%2
Aug 18, 202652,8863,008167,67531.5%3
Aug 17, 202656,8130259,99421.9%3
Aug 14, 202660,4250232,60226.0%3
Aug 13, 202640,7490155,85026.1%3
Aug 12, 202669,1270247,01028.0%3
Aug 11, 202674,6920213,70635.0%3
Aug 10, 202655,2250267,80520.6%3
Aug 7, 202629,7340190,55015.6%2
Aug 6, 202639,0010151,98725.7%3
Aug 5, 202657,4160256,53922.4%2
Aug 4, 2026138,1570427,31432.3%2
Aug 3, 202635,8520229,64715.6%3
Jul 31, 202632,420088,77136.5%2
Jul 30, 202644,538099,68544.7%3
Jul 29, 202694,7320232,95840.7%3
Jul 28, 202637,9240140,18127.1%3
Jul 27, 2026106,2010174,88360.7%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.