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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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IRM short positioning

Twice-monthly snapshots of open short positions.

Settlement 2026-07-31
Short % of Float2.8%294,753,000 float shares
Days to Cover4.51,872,859 average daily volume
Open Short Position8,378,595Iron Mountain Inc.
Change vs Previous+121,982+1.5%

Short interest history

Twice-monthly snapshots of open short positions.

SettlementShort PositionChangeChange %Days to CoverShort % Float
Jul 31, 20268,378,595+121,982+1.5%4.52.8%
Jul 15, 20268,256,613+798,025+10.7%3.42.8%
Jun 30, 20267,458,588-611,765-7.6%4.02.5%

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, 2026146,352721313,31946.7%3
Aug 20, 2026223,8420343,43965.2%3
Aug 19, 2026393,3112,396630,94562.3%3
Aug 18, 2026221,680100473,54646.8%3
Aug 17, 2026206,7920365,20756.6%3
Aug 14, 2026141,6070281,89850.2%3
Aug 13, 2026312,1161,418477,64665.3%3
Aug 12, 2026233,0241,400466,70749.9%3
Aug 11, 2026244,7315539,86345.3%3
Aug 10, 2026281,1472,500656,67742.8%3
Aug 7, 2026443,797904721,30261.5%3
Aug 6, 2026666,9881181,179,61656.5%3
Aug 5, 2026823,70901,306,73863.0%3
Aug 4, 2026346,23342817,61742.3%3
Aug 3, 2026248,807320536,40846.4%3
Jul 31, 2026244,858282630,15638.9%3
Jul 30, 2026369,7505301,067,94834.6%3
Jul 29, 2026323,95910690,94546.9%3
Jul 28, 2026185,910406444,08041.9%3
Jul 27, 2026257,4944587,90643.8%3
Jul 24, 2026410,693195762,64453.9%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.