Regal Partners reports 45.2M shares (3.31%) in Opthea

Opthea Ltd ownership update: Regal Partners Funds Management Pty Limited and Regal Partners Limited report beneficial ownership of 45,215,626 Ordinary Shares, representing 3.31% of the class.

Accepted by SEC EDGAR 07/07/2026 - 06:02 AM EDT Learn about SEC filing dates

Rhea-AI Filing Summary

Opthea Ltd ownership update: Regal Partners Funds Management Pty Limited and Regal Partners Limited report beneficial ownership of 45,215,626 Ordinary Shares, representing 3.31% of the class. The filing states shared voting and dispositive power over the 45,215,626 shares. Each American Depositary Share represents 8 Ordinary Shares.

Key Figures

Beneficial ownership: 45,215,626 shares Percent of class: 3.31% ADS ratio: 1 ADS = 8 Ordinary Shares

3 metrics

Beneficial ownership 45,215,626 shares Amount beneficially owned reported in Item 4

Percent of class 3.31% Percent of class reported in Item 4

ADS ratio 1 ADS = 8 Ordinary Shares American Depositary Share representation stated on cover

Key Terms

Schedule 13G/A, Beneficial ownership, Shared Dispositive Power

3 terms

Schedule 13G/A regulatory

"Amendment No. 1 ) Opthea Ltd Ordinary Shares"

A Schedule 13G/A is an amended public filing with the U.S. securities regulator that updates a previous Schedule 13G, disclosing when an individual or group holds a substantial (typically over 5%) stake in a company and is claiming a passive, non‑controlling intent. Investors monitor these updates because rising or falling holdings can signal changing confidence, potential future moves, or shifts in voting power — like watching a public ledger where large shareholders quietly adjust their positions.

Beneficial ownership regulatory

"Item 4. | Ownership (a) | Amount beneficially owned: 45,215,626"

Beneficial ownership means the person or entity that actually enjoys the benefits of owning shares or other assets — such as receiving dividends, voting rights, or price gains — even if the legal title is held in another name. For investors it matters because knowing who truly controls and profits from a company reveals who can influence decisions, exposes potential conflicts of interest or hidden concentration of power, and affects transparency and risk in the stock.

Shared Dispositive Power regulatory

"Shared Dispositive Power 45,215,626.00"

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What stake does Regal Partners report in Opthea Ltd (CKDXF)?

Regal Partners reports beneficial ownership of 45,215,626 Ordinary Shares (3.31%). The filing lists shared voting and shared dispositive power over those shares, and zero sole voting or dispositive power.

Does the Schedule 13G/A show sole control by Regal Partners in CKDXF?

No. The filing shows 0 shares of sole voting and sole dispositive power. It reports shared voting and shared dispositive power for 45,215,626 Ordinary Shares.

How do the ADS relate to the reported ordinary shares for Opthea (CKDXF)?

Each American Depositary Share represents 8 Ordinary Shares. The filing notes zero ADS held and reports the position in Ordinary Shares, not ADS, in the beneficial ownership table.

Which entities filed the 13G/A for Opthea (CKDXF)?

The filing was submitted by Regal Partners Funds Management Pty Limited and Regal Partners Limited. Both entities are identified as Australian and signed the amendment on 07/01/2026.

Does the filing exceed 5% ownership in Opthea (CKDXF)?

No. The filing explicitly classifies this as ownership of 5 percent or less of a class and reports the percentage as 3.31% of the outstanding Ordinary Shares.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 1)

Opthea Ltd

(Name of Issuer)

Ordinary Shares, no par value and American Depositary Shares, each representing Eight Ordinary Shares, no par value

(Title of Class of Securities)

68386J208

(CUSIP Number)

06/30/2026

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

Rule 13d-1(b)

Rule 13d-1(c)

Rule 13d-1(d)

schemaVersion:

SCHEDULE 13G

CUSIP Number(s): 68386J208

1

Names of Reporting Persons

Regal Partners Funds Management Pty Limited

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

AUSTRALIA

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 45,215,626.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 45,215,626.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

45,215,626.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

3.31 %

12

Type of Reporting Person (See Instructions)

FI

Comment for Type of Reporting Person: The number of shares beneficially owned includes: (i) 45,215,626 Ordinary Shares, no par value ("Ordinary Shares") and (ii) zero American Depositary Shares, each representing Eight Ordinary Shares.

SCHEDULE 13G

CUSIP Number(s): 68386J208

1

Names of Reporting Persons

Regal Partners Limited

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

AUSTRALIA

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 45,215,626.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 45,215,626.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

45,215,626.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

3.31 %

12

Type of Reporting Person (See Instructions)

FI

Comment for Type of Reporting Person: The number of shares beneficially owned includes: (i) 45,215,626 Ordinary Shares, no par value ("Ordinary Shares") and (ii) zero American Depositary Shares, each representing Eight Ordinary Shares.

SCHEDULE 13G

Item 1.
(a)	Name of issuer: Opthea Ltd
(b)	Address of issuer's principal executive offices: Level 4, 650 Chapel Street, South Yarra, Victoria 3141, Australia
Item 2.
(a)	Name of person filing: Regal Partners Funds Management Pty Limited and Regal Partners Limited
(b)	Address or principal business office or, if none, residence: Level 46, Gateway, 1 Macquarie Place, Sydney NSW 2000
(c)	Citizenship: Australian
(d)	Title of class of securities: Ordinary Shares, no par value and American Depositary Shares, each representing Eight Ordinary Shares, no par value
(e)	CUSIP No.: 68386J208
Item 3.	If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:
(a)	Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o);
(b)	Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);
(c)	Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c);
(d)	Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);
(e)	An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);
(f)	An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);
(g)	A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);
(h)	A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
(i)	A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);
(j)	A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J). If filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J), please specify the type of institution:
(k)	Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).
	FI
Item 4.	Ownership
(a)	Amount beneficially owned: 45,215,626
(b)	Percent of class: 3.31 %
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: 0
	(ii) Shared power to vote or to direct the vote: 45,215,626
	(iii) Sole power to dispose or to direct the disposition of: 0
	(iv) Shared power to dispose or to direct the disposition of: 45,215,626
Item 5.	Ownership of 5 Percent or Less of a Class.
	Ownership of 5 percent or less of a class
Item 6.	Ownership of more than 5 Percent on Behalf of Another Person.
	Not Applicable
Item 7.	Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
	Not Applicable
Item 8.	Identification and Classification of Members of the Group.
	Not Applicable
Item 9.	Notice of Dissolution of Group.
	Not Applicable

Item 10.

Certifications:

By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under § 240.14a-11.

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

Regal Partners Funds Management Pty Limited

Signature:	/s/ Candice Driver
Name/Title:	Company Secretary
Date:	07/01/2026

Regal Partners Limited

Signature:	/s/ Kathleen Liu
Name/Title:	Company Secretary
Date:	07/01/2026