Theranostics (NASDAQ: RADX) reports option lapses and new RADAN grants

Rhea-AI Filing Summary

Theranostics Limited reported changes to its capital structure involving lapses and new grants of unquoted options. Several tranches of RADAN and RADAJ options, totaling 8,540,000, 17,305,743, 10,666,666 and 712,301 respectively, ceased on dates in 2025 and early 2026 after conditions for exercise were not satisfied, with no consideration paid.

The company also issued 2,666,666 new RADAN options on 30 June 2026 under an employee incentive scheme, ranking equally with existing RADAN options. Following these changes, issued capital includes 3,544,216,160 RAD ordinary fully paid shares and 423,691,934 RADAN options on issue, alongside other option series with various expiries and exercise prices.

Key Figures

RADAN options lapsed (block 1): 8,540,000 options RADAN options lapsed (block 2): 17,305,743 options RADAN options lapsed (block 3): 10,666,666 options +5 more

8 metrics

RADAN options lapsed (block 1) 8,540,000 options Lapse on 15/05/2026 as conditions not satisfied

RADAN options lapsed (block 2) 17,305,743 options Lapse on 30/01/2026 as conditions not satisfied

RADAN options lapsed (block 3) 10,666,666 options Lapse on 20/11/2025 as conditions not satisfied

RADAJ options lapsed 712,301 options Lapse on 20/11/2025, exercise price $0.17, expiry 01-JUL-2027

New RADAN options issued 2,666,666 options Issued 30/06/2026 under employee incentive scheme

Ordinary shares on issue 3,544,216,160 shares RAD ordinary fully paid shares after reported changes

RADAN options on issue 423,691,934 options RADAN options outstanding after lapses and new issue

RADAJ options on issue 13,137,976 options RADAJ options outstanding after lapses

Key Terms

unquoted +equity securities, Lapse of conditional right to securities, +employee incentive scheme, issued capital, +2 more

6 terms

unquoted +equity securities financial

"Unquoted +equity securities that have ceased Number of securities that have ceased"

Lapse of conditional right to securities financial

"Reason for cessation Lapse of conditional right to securities because the conditions have not been"

+employee incentive scheme financial

"+Other securities issued under an +employee incentive scheme that are not intended to be quoted"

issued capital financial

"we provide the following information about our issued capital"

Listing Rule 7.2 financial

"Were the +securities issued under an exception in Listing Rule 7.2 and therefore the issue did not need any security holder approval"

Registration Number ACN financial

"Registered Number Type Registration Number ACN 647877889"

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FAQ

What did Theranostics Limited (RADX) disclose in this Form 6-K?

Theranostics Limited disclosed lapses of several tranches of unquoted options and the issue of new RADAN options under an employee incentive scheme, updating investors on changes to its option overhang and overall capital structure.

How many Theranostics RADAN options have lapsed according to the filing?

The filing shows RADAN option lapses of 8,540,000, 17,305,743 and 10,666,666 options on various dates, plus 712,301 RADAJ options, after conditions for these conditional rights to securities were not satisfied or became incapable of being satisfied.

How many new RADAN options did Theranostics (RADX) issue under its employee scheme?

Theranostics issued 2,666,666 new RADAN options on 30 June 2026 under an employee incentive scheme. These unquoted options rank equally with the existing RADAN class and were issued without requiring separate security holder approval under Listing Rule 7.2 exception 13.

What is Theranostics Limited’s current number of ordinary shares on issue?

After the reported option lapses and new grants, Theranostics Limited has 3,544,216,160 RAD ordinary fully paid shares on issue. This figure is provided as part of the updated issued capital summary alongside the various option series outstanding.

How many RADAN options are outstanding for Theranostics after these changes?

Following the lapses and the issue of new options, Theranostics has 423,691,934 RADAN options on issue. These options expire on various dates and at various exercise prices, forming part of the company’s broader unquoted equity securities.

Were Theranostics’ new RADAN options issued to key management personnel?

The disclosure states that none of the 2,666,666 new RADAN options issued on 30 June 2026 were allocated to key management personnel or their associates. They were issued under an employee incentive scheme previously approved at the 25 November 2024 AGM.

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

Form 6-K

REPORT OF FOREIGN PRIVATE ISSUER

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

THE SECURITIES EXCHANGE ACT OF 1934

For the Month of June 2026

Commission File Number: 001-41621

RADIOPHARM THERANOSTICS LIMITED

(Name of Registrant)

Level 3, 62 Lygon Street, Carlton South, Victoria, 3053, Australia

(Address of principal executive office)

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

Form 20-F ☒       Form 40-F ☐

RADIOPHARM THERANOSTICS LIMITED

EXPLANATORY NOTE

Radiopharm Theranostics Limited (the “Company”) published two announcements (the “Public Notice”) to the Australian Securities Exchange on June 30, 2026 titled:

“Notification of cessation of securities - RAD” 

“Notification regarding unquoted securities – RAD”

A copy of the Public Notice is attached as an exhibit to this report on Form 6-K.

This report on Form 6-K (including any exhibit hereto) shall not be deemed to be “filed” for purposes of the Securities Exchange Act of 1934 and shall not be incorporated by reference into any registration statement or prospectus under the Securities Act of 1933, except as shall be expressly set forth by specific reference in such registration statement or prospectus.

1

EXHIBITS

Exhibit Number		Description
99.1		Notification of cessation of securities - RAD
99.2		Notification regarding unquoted securities – RAD

2

SIGNATURE

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, thereunto duly authorized.

	RADIOPHARM THERANOSTICS LIMITED
Date: June 30, 2026	By:	/s/ Nathan Jong
		Nathan Jong
		Company Secretary

3

Exhibit 99.1

Appendix 3H - Notification of cessation of securities

Announcement Summary

Entity name

RADIOPHARM THERANOSTICS LIMITED

Announcement Type

New announcement

Date of this announcement

Tuesday June 30, 2026

Details of +securities that have ceased

ASX +security code		Security description		Number of +securities that have ceased		The +securities have ceased due to		Date of cessation
RADAN		OPTION EXPIRING VARIOUS DATES EX VARIOUS PRICES		8,540,000		Lapse of conditional right to securities because the conditions have not been, or have become incapable of being, satisfied		15/05/2026
RADAN		OPTION EXPIRING VARIOUS DATES EX VARIOUS PRICES		17,305,743		Lapse of conditional right to securities because the conditions have not been, or have become incapable of being, satisfied		30/01/2026
RADAN		OPTION EXPIRING VARIOUS DATES EX VARIOUS PRICES		10,666,666		Lapse of conditional right to securities because the conditions have not been, or have become incapable of being, satisfied		20/11/2025
RADAN		OPTION EXPIRING 01-JUL-2027 EX $0.17		712,301		Lapse of conditional right to securities because the conditions have not been, or have become incapable of being, satisfied		20/11/2025

Refer to next page for full details of the announcement

Appendix 3H - Notification of cessation of securities 1 / 5

Appendix 3H - Notification of cessation of securities

Part 1 - Announcement Details

1.1 Name of +Entity

RADIOPHARM THERANOSTICS LIMITED

We (the entity named above) provide the following information about our issued capital.

	1.2	Registered Number Type	Registration Number
	ACN		647877889

1.3 ASX issuer code

RAD

1.4 The announcement is

New announcement

1.5 Date of this announcement

30/6/2026

Appendix 3H - Notification of cessation of securities 2 / 5

Appendix 3H - Notification of cessation of securities

Part 2 - Details of +equity securities or +debt securities that have ceased

ASX +Security Code and Description

RADAN : OPTION EXPIRING VARIOUS DATES EX VARIOUS PRICES

Unquoted +equity securities that have ceased

Number of securities that have ceased

8,540,000

Reason for cessation

Lapse of conditional right to securities because the conditions have not been, or have become incapable of being, satisfied

Date of cessation	Is the entity paying any consideration for the cessation?
15/5/2026	No

Any other information the entity wishes to notify to ASX about the cessation?

ASX +Security Code and Description

RADAN : OPTION EXPIRING VARIOUS DATES EX VARIOUS PRICES

Unquoted +equity securities that have ceased

Number of securities that have ceased

17,305,743

Reason for cessation

Lapse of conditional right to securities because the conditions have not been, or have become incapable of being, satisfied

Date of cessation	Is the entity paying any consideration for the cessation?
30/1/2026	No

Any other information the entity wishes to notify to ASX about the cessation?

Appendix 3H - Notification of cessation of securities 3 / 5

Appendix 3H - Notification of cessation of securities

ASX +Security Code and Description

RADAN : OPTION EXPIRING VARIOUS DATES EX VARIOUS PRICES

Unquoted +equity securities that have ceased

Number of securities that have ceased

10,666,666

Reason for cessation

Lapse of conditional right to securities because the conditions have not been, or have become incapable of being, satisfied

Date of cessation	Is the entity paying any consideration for the cessation?
20/11/2025	No

Any other information the entity wishes to notify to ASX about the cessation?

ASX +Security Code and Description

RADAJ : OPTION EXPIRING 01-JUL-2027 EX $0.17

Unquoted +equity securities that have ceased

Number of securities that have ceased

712,301

Reason for cessation

Lapse of conditional right to securities because the conditions have not been, or have become incapable of being, satisfied

Date of cessation	Is the entity paying any consideration for the cessation?
20/11/2025	No

Any other information the entity wishes to notify to ASX about the cessation?

Appendix 3H - Notification of cessation of securities 4 / 5

Appendix 3H - Notification of cessation of securities

Part 3 - Issued capital following changes

Following the cessation of the +securities the subject of this notification, the issued capital of the entity will comprise:

The figures in parts 3.1 and 3.2 below are automatically generated and may not reflect the entity’s current issued capital if other Appendix 2A, Appendix 3G or Appendix 3H forms are currently with ASX for processing.

3.1 Quoted +equity securities and +debt securities (total number of each +class of +securities quoted on ASX)

ASX +security code and description		Total number of +securities on issue
RADO : OPTION EXPIRING 30-NOV-2026			79,352,040
RAD : ORDINARY FULLY PAID			3,544,216,160
RADOA : OPTION EXPIRING 24-AUG-2026			818,890,534
RADOB : OPTION EXPIRING 31-OCT-2027			1,179,266,658

3.2 Unquoted +equity securities (total number of each +class of +equity securities issued but not quoted on ASX)

ASX +security code and description		Total number of +securities on issue
RADAK : OPTION EXPIRING 01-JUN-2027 EX $0.60			1,666,500
RADAN : OPTION EXPIRING VARIOUS DATES EX VARIOUS PRICES			384,512,859
RADAJ : OPTION EXPIRING 01-JUL-2027 EX $0.17			12,425,675
RADAF : OPTION EXPIRING 25-NOV-2026 RESTRICTED			8,666,678
RADAG : OPTION EXPIRING 25-NOV-2026 EX $0.60			5,066,672
RADAI : OPTION EXPIRING 27-MAY-2027 EX $0.60			740,000
RADAP : OPTION EXPIRING 24-APR-2028 EX $0.09			8,955,224

Note: the figures stated in the tables above are used to calculate the total market capitalisation of the entity published by ASX from time to time. The table will not include those classes of +securities that have ceased or lapsed in their entirety in ASX records before the announcement date described in Q1.5, even if the entity has advised ASX of a change to that class of +security in Part 2 of this form.

Appendix 3H - Notification of cessation of securities 5 / 5

Exhibit 99.2

Appendix 3G - Notification of issue, conversion or payment up of unquoted equity securities

Announcement Summary

Entity name

RADIOPHARM THERANOSTICS LIMITED

Date of this announcement

Tuesday June 30, 2026

The +securities the subject of this notification are:

+Other securities issued under an +employee incentive scheme that are not intended to be quoted on ASX

Total number of +securities to be issued/transferred

ASX +security code		Security description			Total number of +securities to be issued/transferred		Issue date
RADAN		OPTION EXPIRING VARIOUS DATES EX VARIOUS PRICES			2,666,666		30/06/2026

Refer to next page for full details of the announcement

Appendix 3G - Notification of issue, conversion or payment up of unquoted equity securities 1 / 6

Appendix 3G - Notification of issue, conversion or payment up of unquoted equity securities

Part 1 - Entity and announcement details

1.1 Name of entity

RADIOPHARM THERANOSTICS LIMITED

We (the entity named above) give notice of the issue, conversion or payment up of the following unquoted +securities

	1.2	Registered number type	Registration number
	ACN		647877889

1.3 ASX issuer code

RAD

1.4 The announcement is

New announcement

1.5 Date of this announcement

30/6/2026

Appendix 3G - Notification of issue, conversion or payment up of unquoted equity securities 2 / 6

Appendix 3G - Notification of issue, conversion or payment up of unquoted equity securities

Part 2 - Issue details

2.1 The +securities the subject of this notification are:

+Other securities issued under an +employee incentive scheme that are not intended to be quoted on ASX

2.2a This notification is given in relation to an issue of +securities in a class which is not quoted on ASX and which:

has an existing ASX security code (“existing class”)

Appendix 3G - Notification of issue, conversion or payment up of unquoted equity securities 3 / 6

Appendix 3G - Notification of issue, conversion or payment up of unquoted equity securities

Part 3B - number and type of +securities the subject of this notification (existing class) where issue has not previously been notified to ASX in an Appendix 3B

ASX +security code and description

RADAN : OPTION EXPIRING VARIOUS DATES EX VARIOUS PRICES

Date the +securities the subject of this notification were issued

30/6/2026

Will these +securities rank equally in all respects from their issue date with the existing issued +securities in that class

Yes

Were any of the +securities issued to +key management personnel (KMP) or an +associate?

No

Please provide a URL link for a document lodged with ASX detailing the terms of the +employee incentive scheme or a summary of the terms

Notice of AGM held 25 November 2024
https://cdn-api.markitdigital.com/apiman-gateway/ASX/asx-research/1.0/file/2924-02871492-2A1557838&v=4a466cc3f89 9e00730cfbfcd5ab8940c41f474b6

Any other information the entity wishes to provide about the +securities the subject of this notification

Issue details

Number of +securities

2,666,666

Appendix 3G - Notification of issue, conversion or payment up of unquoted equity securities 4 / 6

Appendix 3G - Notification of issue, conversion or payment up of unquoted equity securities

Part 4 - +Securities on issue

Following the issue, conversion or payment up of the +securities the subject of this notification, the +securities of the entity will comprise:

The figures in parts 4.1 and 4.2 below are automatically generated and may not reflect the entity’s current issued capital if other Appendix 2A, Appendix 3G or Appendix 3H forms are currently with ASX for processing.

4.1 Quoted +securities (Total number of each +class of +securities issued and quoted on ASX)

ASX +security code and description		Total number of +securities on issue
RADO : OPTION EXPIRING 30-NOV-2026			79,352,040
RAD : ORDINARY FULLY PAID			3,544,216,160
RADOA : OPTION EXPIRING 24-AUG-2026			818,890,534
RADOB : OPTION EXPIRING 31-OCT-2027			1,179,266,658

4.2 Unquoted +securities (Total number of each +class of +securities issued but not quoted on ASX)

ASX +security code and description		Total number of +securities on issue
RADAK : OPTION EXPIRING 01-JUN-2027 EX $0.60			1,666,500
RADAN : OPTION EXPIRING VARIOUS DATES EX VARIOUS PRICES			423,691,934
RADAJ : OPTION EXPIRING 01-JUL-2027 EX $0.17			13,137,976
RADAF : OPTION EXPIRING 25-NOV-2026 RESTRICTED			8,666,678
RADAG : OPTION EXPIRING 25-NOV-2026 EX $0.60			5,066,672
RADAI : OPTION EXPIRING 27-MAY-2027 EX $0.60			740,000
RADAP : OPTION EXPIRING 24-APR-2028 EX $0.09			8,955,224

Appendix 3G - Notification of issue, conversion or payment up of unquoted equity securities 5 / 6

Appendix 3G - Notification of issue, conversion or payment up of unquoted equity securities

Part 5 - Other Listing Rule requirements

5.1 Were the +securities issued under an exception in Listing Rule 7.2 and therefore the issue did not need any security holder approval under Listing Rule 7.1?

Yes

5.1a Select the number of the applicable exception in Listing Rule 7.2

13

Appendix 3G - Notification of issue, conversion or payment up of unquoted equity securities 6 / 6

Filing Exhibits & Attachments

2 documents

Press Releases

• EX-99.1 NOTIFICATION OF CESSATION OF SECURITIES - RAD 46.1 KB
• EX-99.2 NOTIFICATION REGARDING UNQUOTED SECURITIES - RAD 58.9 KB