6-K

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 6-K

REPORT OF FOREIGN ISSUER

PURSUANT TO RULE 13a-16 OR 15d-16

OF THE SECURITIES EXCHANGE ACT OF 1934

For the month of September, 2024

Commission File No. 001-39621

OPTHEA LIMITED

(Translation of registrant’s name into English)

Level 4

650 Chapel Street

South Yarra, Victoria, 3141

Australia

(Address of registrant’s principal executive office)

Indicate by check mark whether the registrant files or will file annual reports under cover Form 20-F or Form 40-F.

Form 20-F ☒ Form 40-F ☐

EXHIBIT INDEX

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereto duly authorized.

Date: 09/30/2024

EX-99.1

Exhibit 99.1

ASX, Nasdaq and Media Release

September 30, 2024

Opthea to Participate in the UBS Virtual Ophthalmology Day 2024

Melbourne, Australia, and Princeton, NJ, US, September 30, 2024 -- Opthea Limited (ASX/NASDAQ:OPT, “Opthea”, the “Company”), a clinical-stage biopharmaceutical company developing novel therapies to treat highly prevalent and progressive retinal diseases, including wet age-related macular degeneration (wet AMD), today announced that management will participate in a fireside chat and be available for one-on-one investor meetings at the UBS Virtual Ophthalmology Day 2024 being held on October 2, 2024.

UBS Virtual Ophthalmology Day 2024

Fireside chat: Wednesday, October 2, 2024, 4:00 PM EST

Presenter: Frederic Guerard, PharmD, CEO

Webcast link: https://kvgo.com/ubs/opthea-ltd-oct-2024

The webcast can also be accessed under “Events & Presentations” in the Investor Relations section of the Company’s website, www.opthea.com.

About Opthea

Opthea (ASX/NASDAQ:OPT) is a biopharmaceutical company developing novel therapies to address the unmet needs in the treatment of highly prevalent and progressive retinal diseases, including wet age-related macular degeneration (wet AMD) and diabetic macular edema (DME).

Opthea’s lead product candidate, sozinibercept, is being evaluated in two fully enrolled pivotal Phase 3 clinical trials (COAST,NCT04757636, and ShORe, NCT04757610) for use in combination with standard-of-care anti-VEGF-A monotherapies to improve the overall efficacy and deliver superior vision gains compared to standard-of-care anti-VEGF-A agents alone.

To learn more, visit our website at www.opthea.com and follow us on X and LinkedIn

Authorized for release to ASX by Frederic Guerard, CEO