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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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CERT short positioning

Twice-monthly snapshots of open short positions.

Settlement 2026-07-31
Short % of Float25.8%111,953,000 float shares
Days to Cover7.73,731,192 average daily volume
Open Short Position28,839,594Certara, Inc. Common Stock
Change vs Previous-889,874-3.0%

Short interest history

Twice-monthly snapshots of open short positions.

SettlementShort PositionChangeChange %Days to CoverShort % Float
Jul 31, 202628,839,594-889,874-3.0%7.725.8%
Jul 15, 202629,729,468+347,304+1.2%7.826.6%
Jun 30, 202629,382,164+850,863+3.0%5.026.2%

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, 2026386,8960721,14853.7%3
Aug 20, 2026483,9950691,26370.0%3
Aug 19, 2026333,8950572,85458.3%3
Aug 18, 2026388,5050583,96466.5%2
Aug 17, 2026832,31101,087,01276.6%3
Aug 14, 2026302,1820473,94763.8%3
Aug 13, 2026956,70501,666,44757.4%3
Aug 12, 2026345,4820528,40265.4%3
Aug 11, 2026356,3770738,71548.2%3
Aug 10, 2026385,6980822,62846.9%3
Aug 7, 2026506,0920723,74869.9%3
Aug 6, 2026417,395391703,02559.4%2
Aug 5, 2026611,98812,8641,152,13953.1%3
Aug 4, 20262,901,23734,2163,737,86077.6%3
Aug 3, 2026710,79801,087,04165.4%3
Jul 31, 2026616,34601,401,49044.0%3
Jul 30, 20261,072,66201,662,42164.5%3
Jul 29, 2026601,6914,6651,309,49445.9%3
Jul 28, 2026974,6236321,668,21758.4%3
Jul 27, 2026598,606276844,53670.9%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.