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Applied Optoelectronics AAOI

US equityMarket cap rank #1439
$121.57 +$5.98 (+5.17%)
Market closed · Oct 6, 12:40 am ET · Last extended-hours $122.00 +0.35%
Open$118.50
Prev close$115.59
Day range$112.80 – $121.92
Volume9.35M
Market cap$10.32B
P/E (TTM)–
Dividend yield–

Ownership & positioning

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

Short interest14.49% of floatDays to cover 2.0 · as of 15 Sep 2026
Short-sale volume share19.6%5-day average of daily volume

Short-sale volume as % of daily volume

15%18%20%22%Sep '26Sep '26Oct '26

Reported short interest has risen from 13.40% to 14.49% 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 12,307,146 14.5% 2.0
31 Aug 2026 12,086,618 14.2% 1.3
14 Aug 2026 10,421,985 12.3% 1.0
31 Jul 2026 10,434,298 13.0% 1.2
15 Jul 2026 9,936,995 12.4% 1.1
30 Jun 2026 10,756,408 13.4% 1.0

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