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Align Technology ALGN

US equityMarket cap rank #1461
$140.65 −$3.09 (-2.15%)
Market closed · Oct 5, 8:10 pm ET · Last extended-hours $140.20 -0.32%
Open$140.07
Prev close$143.74
Day range$138.36 – $142.35
Volume1.68M
Market cap$9.99B
P/E (TTM)24.4
Dividend yield–

Ownership & positioning

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

Short interest5.49% of floatDays to cover 4.9 · as of 15 Sep 2026
Short-sale volume share17.3%5-day average of daily volume

Short-sale volume as % of daily volume

11%15%19%23%Sep '26Sep '26Oct '26

Reported short interest has fallen from 6.54% to 5.49% 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 3,901,037 5.5% 4.9
31 Aug 2026 3,856,413 5.4% 4.4
14 Aug 2026 3,426,703 4.8% 4.3
31 Jul 2026 4,202,287 5.9% 4.0
15 Jul 2026 4,825,290 6.7% 5.4
30 Jun 2026 4,682,178 6.5% 3.9

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