# Opthea Limited (OPT) Source: https://www.quantisnow.com/company/OPT Generated: 2026-11-13T22:00:31.266Z - Ticker: OPT - Exchange: NASDAQ - Sector: Health Care - Industry: Biotechnology: Biological Products (No Diagnostic Substances) - IPO year: 2020 - Website: opthea.com ## About Opthea Limited, a clinical stage biopharmaceutical company, develops and commercializes therapies primarily for eye disease in Australia. The company's development activities are based on the intellectual property portfolio covering Vascular Endothelial Growth Factors (VEGF) VEGF-C, VEGF-D, and VEGF Receptor-3 for the treatment of diseases associated with blood and lymphatic vessel growth, as well as vascular leakage. Its lead asset is OPT 302, a soluble form of VEGFR 3 in clinical development as a novel therapy for wet neovascular age related macular degeneration and diabetic macular edema DME, as well as a first in class VEGF C/D inhibitors for treatment with VEGF A inhibitors for the treatment of wet neovascular AMD and other retinal diseases. The company was formerly known as Circadian Technologies Limited and changed its name to Opthea Limited in December 2015. Opthea Limited was incorporated in 1984 and is based in South Yarra, Australia. ## Latest OPT news and filings - 2025-11-20 21:05 UTC [SEC Form 15F-12B filed by Opthea Limited](https://www.quantisnow.com/insight/sec-form-15f-12b-filed-by-opthea-limited-6288729) - 2025-11-20 21:02 UTC [SEC Form 6-K] [SEC Form 6-K filed by Opthea Limited](https://www.quantisnow.com/insight/sec-form-6-k-filed-by-opthea-limited-6288670) - 2025-11-12 13:30 UTC [SEC Form 6-K] [SEC Form 6-K filed by Opthea Limited](https://www.quantisnow.com/insight/sec-form-6-k-filed-by-opthea-limited-6273148) - 2025-11-10 13:50 UTC [SEC Form S-8 POS] [SEC Form S-8 POS filed by Opthea Limited](https://www.quantisnow.com/insight/sec-form-s-8-pos-filed-by-opthea-limited-6269899) - 2025-11-10 13:45 UTC [SEC Form 25 filed by Opthea Limited](https://www.quantisnow.com/insight/sec-form-25-filed-by-opthea-limited-6269870) - 2025-10-31 13:28 UTC [SEC Form 6-K] [SEC Form 6-K filed by Opthea Limited](https://www.quantisnow.com/insight/sec-form-6-k-filed-by-opthea-limited-6253977) - 2025-10-30 12:00 UTC [SEC Form 6-K] [SEC Form 6-K filed by Opthea Limited](https://www.quantisnow.com/insight/sec-form-6-k-filed-by-opthea-limited-6251426) - 2025-10-27 10:01 UTC [SEC Form 6-K] [SEC Form 6-K filed by Opthea Limited](https://www.quantisnow.com/insight/sec-form-6-k-filed-by-opthea-limited-6245109) - 2025-10-10 10:01 UTC [SEC Form 6-K] [SEC Form 6-K filed by Opthea Limited](https://www.quantisnow.com/insight/sec-form-6-k-filed-by-opthea-limited-6229460) - 2025-10-06 10:01 UTC [SEC Form 6-K] [SEC Form 6-K filed by Opthea Limited](https://www.quantisnow.com/insight/sec-form-6-k-filed-by-opthea-limited-6223669) - 2025-09-15 10:49 UTC [SEC Form 20-F filed by Opthea Limited](https://www.quantisnow.com/insight/sec-form-20-f-filed-by-opthea-limited-6200177) - 2025-09-15 10:01 UTC [SEC Form 6-K] [SEC Form 6-K filed by Opthea Limited](https://www.quantisnow.com/insight/sec-form-6-k-filed-by-opthea-limited-6200144) - 2025-08-29 10:07 UTC [SEC Form 6-K] [SEC Form 6-K filed by Opthea Limited](https://www.quantisnow.com/insight/sec-form-6-k-filed-by-opthea-limited-6183148) - 2025-08-19 23:32 UTC [SEC Form 6-K] [SEC Form 6-K filed by Opthea Limited](https://www.quantisnow.com/insight/sec-form-6-k-filed-by-opthea-limited-6172677) - 2025-08-19 10:30 UTC [SEC Form 6-K] [SEC Form 6-K filed by Opthea Limited](https://www.quantisnow.com/insight/sec-form-6-k-filed-by-opthea-limited-6170849) - 2025-08-19 10:01 UTC [SEC Form 6-K] [SEC Form 6-K filed by Opthea Limited](https://www.quantisnow.com/insight/sec-form-6-k-filed-by-opthea-limited-6170812) - 2025-08-18 23:00 UTC [Conference Announcement] [Opthea Provides Corporate Update](https://www.quantisnow.com/insight/opthea-provides-corporate-update-6170644) - 2025-06-02 10:05 UTC [SEC Form 6-K] [SEC Form 6-K filed by Opthea Limited](https://www.quantisnow.com/insight/sec-form-6-k-filed-by-opthea-limited-6066307) - 2025-04-10 10:05 UTC [SEC Form 6-K] [SEC Form 6-K filed by Opthea Limited](https://www.quantisnow.com/insight/sec-form-6-k-filed-by-opthea-limited-5983430) - 2025-03-31 10:07 UTC [SEC Form 6-K] [SEC Form 6-K filed by Opthea Limited](https://www.quantisnow.com/insight/sec-form-6-k-filed-by-opthea-limited-5965756) - 2025-03-31 04:01 UTC [Opthea Announces Decision to Discontinue Wet AMD Trials](https://www.quantisnow.com/insight/opthea-announces-decision-to-discontinue-wet-amd-trials-5965584) - 2025-03-25 12:30 UTC [Analyst Downgrade] [Opthea Ltd. downgraded by H.C. Wainwright with a new price target](https://www.quantisnow.com/insight/opthea-ltd-downgraded-by-hc-wainwright-with-a-new-price-5958840) - 2025-03-25 12:25 UTC [Analyst Downgrade] [Opthea Ltd. downgraded by Leerink Partners with a new price target](https://www.quantisnow.com/insight/opthea-ltd-downgraded-by-leerink-partners-with-a-new-price-5958788) - 2025-03-25 12:25 UTC [Analyst Downgrade] [Opthea Ltd. downgraded by Jefferies with a new price target](https://www.quantisnow.com/insight/opthea-ltd-downgraded-by-jefferies-with-a-new-price-target-5958786) - 2025-03-24 16:56 UTC [Analyst Downgrade] [Opthea Ltd. downgraded by Oppenheimer](https://www.quantisnow.com/insight/opthea-ltd-downgraded-by-oppenheimer-5957366) - 2025-03-24 10:06 UTC [SEC Form 6-K] [SEC Form 6-K filed by Opthea Limited](https://www.quantisnow.com/insight/sec-form-6-k-filed-by-opthea-limited-5956776) - 2025-03-24 04:01 UTC [Opthea Announces COAST Phase 3 Trial Topline Results](https://www.quantisnow.com/insight/opthea-announces-coast-phase-3-trial-topline-results-5956711) - 2025-03-03 12:00 UTC [Opthea Announces Phase 2b Wet AMD Publication](https://www.quantisnow.com/insight/opthea-announces-phase-2b-wet-amd-publication-5918907) - 2025-03-03 11:02 UTC [SEC Form 6-K] [SEC Form 6-K filed by Opthea Limited](https://www.quantisnow.com/insight/sec-form-6-k-filed-by-opthea-limited-5918752) - 2025-02-28 12:00 UTC [Opthea Reports Half Year Results and Business Updates](https://www.quantisnow.com/insight/opthea-reports-half-year-results-and-business-updates-5916138) - 2025-02-28 11:03 UTC [SEC Form 6-K] [SEC Form 6-K filed by Opthea Limited](https://www.quantisnow.com/insight/sec-form-6-k-filed-by-opthea-limited-5916051) - 2025-02-26 12:00 UTC [Opthea Completes Drug Product PPQ Campaign](https://www.quantisnow.com/insight/opthea-completes-drug-product-ppq-campaign-5910100) - 2025-02-26 11:01 UTC [SEC Form 6-K] [SEC Form 6-K filed by Opthea Limited](https://www.quantisnow.com/insight/sec-form-6-k-filed-by-opthea-limited-5909977) - 2025-02-18 12:00 UTC [Opthea Completes COAST Final Week 52 Patient Visit](https://www.quantisnow.com/insight/opthea-completes-coast-final-week-52-patient-visit-5892725) - 2025-02-18 11:06 UTC [SEC Form 6-K] [SEC Form 6-K filed by Opthea Limited](https://www.quantisnow.com/insight/sec-form-6-k-filed-by-opthea-limited-5892600) - 2025-02-07 12:00 UTC [Conference Announcement] [Opthea to Present at Oppenheimer Healthcare Conference](https://www.quantisnow.com/insight/opthea-to-present-at-oppenheimer-healthcare-conference-5876641) - 2025-02-07 11:04 UTC [SEC Form 6-K] [SEC Form 6-K filed by Opthea Limited](https://www.quantisnow.com/insight/sec-form-6-k-filed-by-opthea-limited-5876556) - 2025-02-06 12:00 UTC [Opthea Wet AMD Data Featured at Macula Society Meeting](https://www.quantisnow.com/insight/opthea-wet-amd-data-featured-at-macula-society-meeting-5874460) - 2025-02-06 11:02 UTC [SEC Form 6-K] [SEC Form 6-K filed by Opthea Limited](https://www.quantisnow.com/insight/sec-form-6-k-filed-by-opthea-limited-5874303) - 2025-01-28 18:30 UTC [SEC Form 6-K] [SEC Form 6-K filed by Opthea Limited](https://www.quantisnow.com/insight/sec-form-6-k-filed-by-opthea-limited-5859596) ## More - Live page with ratings, short volume, options and peers: https://www.quantisnow.com/company/OPT - Earnings history: https://www.quantisnow.com/earnings/OPT - Dividend history: https://www.quantisnow.com/dividends/OPT - Insider transactions: https://www.quantisnow.com/insiders/OPT - Options chain: https://www.quantisnow.com/options/OPT - SEC 8-K filings only: https://www.quantisnow.com/company/OPT/8-k - RSS and alerts for OPT: https://www.quantisnow.com/docs/rss-feeds.md