# EDGAR Filing Document

**Accession Number:** 0001949257
**File Stem:** 0001213900-26-037929
**Filing Date:** 2026-4
**Character Count:** 6622
**Document Hash:** 797d73601264930340dfd367d732901e
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001213900-26-037929.hdr.sgml**: 20260401

**ACCESSION NUMBER**: 0001213900-26-037929

**CONFORMED SUBMISSION TYPE**: 3

**PUBLIC DOCUMENT COUNT**: 1

**CONFORMED PERIOD OF REPORT**: 20260318

**FILED AS OF DATE**: 20260401

**DATE AS OF CHANGE**: 20260401

**REPORTING-OWNER**: 

**OWNER DATA:**
- **COMPANY CONFORMED NAME:** Turner Ian Lawrence
- **CENTRAL INDEX KEY:** 0002121622

**ORGANIZATION NAME:**

**FILING VALUES:**
- **FORM TYPE:** 3
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-41621
- **FILM NUMBER:** 26824544

**MAIL ADDRESS:**
- **ADDRESS IS A NON US LOCATION:** YES
- **STREET 1:** SUITE 1 LEVEL 3, 62 LYGON STREET
- **CITY:** CARLTON SOUTH, VIC
- **PROVINCE COUNTRY:** C3
- **ZIP:** 3053
**ISSUER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Radiopharm Theranostics Ltd
- **CENTRAL INDEX KEY:** 0001949257
- **STANDARD INDUSTRIAL CLASSIFICATION:** PHARMACEUTICAL PREPARATIONS [2834]
- **ORGANIZATION NAME:** 03 Life Sciences
- **EIN:** 000000000
- **STATE OF INCORPORATION:** C3
- **FISCAL YEAR END:** 0630

**BUSINESS ADDRESS:**
- **ADDRESS IS A NON US LOCATION:** YES
- **STREET 1:** LEVEL 3, 62 LYGON STREET
- **CITY:** CARLTON VIC
- **PROVINCE COUNTRY:** C3
- **ZIP:** 3053
- **BUSINESS PHONE:** 61 3 9824 5254

**MAIL ADDRESS:**
- **ADDRESS IS A NON US LOCATION:** YES
- **STREET 1:** LEVEL 3, 62 LYGON STREET
- **CITY:** CARLTON VIC
- **PROVINCE COUNTRY:** C3
- **ZIP:** 3053

### UNITED STATES SECURITIES AND EXCHANGE COMMISSION
**Washington, D.C. 20549**

## FORM 3

### INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

[ ] Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

---

| | | |
|:---|:---|:---|
| **1. Name and Address of Reporting Person**<sup>*</sup><br>Turner Ian Lawrence<br><sub>(Last) (First) (Middle)</sub><br>SUITE 1 LEVEL 3<br>62 LYGON STREET<br><sub>(Street)</sub><br>CARLTON SOUTH, VICTORIA, AUSTRALIA 3053<br><sub>(City) (State) (Zip)</sub> | **3. Issuer Name and Ticker or Trading Symbol**<br>Radiopharm Theranostics Ltd [ RADX ] | **5. If Amendment, Date of Original Filed (Month/Day/Year)**<br>  |
| **2. Date of Event Requiring Statement (Month/Day/Year)**<br>2026-03-18 | **4. Relationship of Reporting Person(s) to Issuer**<br>(Check all applicable)<br>[X] Director   [ ] 10% Owner<br>[ ] Officer (give title below)   [ ] Other (specify below)<br>_ _ | **6. Individual or Joint/Group Filing (Check Applicable Line)**<br>[X] Form filed by One Reporting Person<br>[ ] Form filed by More than One Reporting Person |

---

## Table I - Non-Derivative Securities Beneficially Owned

---

|  |  |  |  |
| --- | --- | --- | --- |
| 1. Title of Security | 2. Amount of Securities Beneficially Owned | 3. Ownership Form | 4. Nature of Indirect Beneficial Ownership |
| Ordinary Shares | 6985292 | D |  |
| Ordinary Shares | 3000000 | I | Held through the Turner Discretionary Trust, of which Mr. Turner is the sole beneficiary |

---

## Table II - Derivative Securities Beneficially Owned

---

|  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- |
| 1. Title of Derivative Security | 2. Date Exercisable and Expiration Date (Month/Day/Year) | 2. Date Exercisable and Expiration Date (Month/Day/Year) | 3. Title and Amount of Underlying Securities | 3. Title and Amount of Underlying Securities | 4. Conversion or Exercise Price | 5. Ownership Form | 6. Nature of Indirect Beneficial Ownership |
| 1. Title of Derivative Security | Date Exercisable | Expiration Date | Title | Amount or Number of Shares | 4. Conversion or Exercise Price | 5. Ownership Form | 6. Nature of Indirect Beneficial Ownership |
| Option (right to buy) | <sup>(1)</sup> | 2030-07-01 | Ordinary Shares | 6814000 | $0.025 | D |  |
| Option (right to buy) | 2025-09-30 | 2029-09-30 | Ordinary Shares | 2666667 | $0.060 | D |  |
| Option (right to buy) | <sup>(2)</sup> | 2029-09-30 | Ordinary Shares | 5333333 | $0.060 | D |  |
| Option (right to buy) | 2025-07-01 | 2029-06-30 | Ordinary Shares | 1346801 | $0.041 | D |  |
| Option (right to buy) | <sup>(3)</sup> | 2029-06-30 | Ordinary Shares | 2693603 | $0.041 | D |  |
| Option (right to buy) | 2024-09-12 | 2026-08-24 | Ordinary Shares | 1125000 | $0.060 | D |  |
| Option (right to buy) | 2024-07-01 | 2028-07-01 | Ordinary Shares | 483622 | $0.112 | D |  |
| Option (right to buy) | 2025-07-01 | 2028-07-01 | Ordinary Shares | 483622 | $0.112 | D |  |
| Option (right to buy) | <sup>(4)</sup> | 2028-07-01 | Ordinary Shares | 483768 | $0.112 | D |  |
| Option (right to buy) | 2023-07-01 | 2027-07-30 | Ordinary Shares | 550448 | $0.170 | D |  |
| Option (right to buy) | 2024-07-01 | 2027-07-30 | Ordinary Shares | 550448 | $0.170 | D |  |
| Option (right to buy) | 2025-07-01 | 2027-07-30 | Ordinary Shares | 550614 | $0.170 | D |  |
| Option (right to buy) | 2024-09-12 | 2026-08-24 | Ordinary Shares | 750000 | $0.060 | I | Held through Mr. Turner's superannuation fund |
| Option (right to buy) | 2022-11-25 | 2026-11-30 | Ordinary Shares | 70422 | $0.20 | D |  |

---

### Footnotes:

(1) Granted on December 12, 2025. 2,271,333 options will vest on July 1, 2026, 2,271,333 options will vest on July 1, 2027 and 2,271,334 options will vest on July 1, 2028 provided Mr. Turner is still a Director on such dates.

(2) Granted on December 16, 2024. 2,666,667 options will vest on September 30, 2026 and 2,666,666 options will vest on September 30, 2027 provided Mr. Turner is still a Director on such dates.

(3) Granted on December 16, 2024. 1,346,801 options will vest on July 1, 2026 and 1,346,802 options will vest on July 1, 2027 subject to Mr. Turner achieving certain milestones.

(4) Granted on December 1, 2023. 483,768 options will vest on July 1, 2026 subject to Mr. Turner achieving certain milestones.

**Remarks:**
1. All exercise prices are in Australian dollars.

**Signature:** /s/ Ian Lawrence Turner  
**Date:** 2026-04-01

### Remarks:

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).

** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).

Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.

**Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.**