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Certara CERT

US equityMarket cap rank #2958
$10.07 +$0.71 (+7.59%)
Market closed · Oct 5, 11:00 pm ET · Last extended-hours $10.15 +0.79%
Open$9.36
Prev close$9.36
Day range$9.28 – $10.07
Volume2.94M
Market cap$1.54B
P/E (TTM)–
Dividend yield–

Ownership & positioning

Who holds it, who is betting against it, and where the big money is moving

Short interest18.89% of floatDays to cover 15.0 · as of 15 Sep 2026
Short-sale volume share23.3%5-day average of daily volume

Short-sale volume as % of daily volume

16%22%28%34%Sep '26Sep '26Oct '26

Reported short interest has held roughly steady near 18.89% of float over the last 6 biweekly reports (30 Jun 2026 to 15 Sep 2026).

Short interest, by report

Report dateShares short% of floatDays to cover
15 Sep 2026 28,814,125 18.9% 15.0
31 Aug 2026 28,972,317 19.0% 13.1
14 Aug 2026 25,229,619 16.5% 6.2
31 Jul 2026 28,839,594 18.5% 7.7
15 Jul 2026 29,729,468 19.1% 7.8
30 Jun 2026 29,382,164 18.9% 5.0

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