Comparable stake leader
REGAL PARTNERS HOLDINGS PTY LTD
SEC ownership of Radiopharm Theranostics Ltd
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0001949257.
Disclosed value leader
REGAL PARTNERS HOLDINGS PTY LTD
Comparable rows
9/14
Latest evidence
31 Mar 2026
- Symbol
- RADX on Nasdaq, RDPTF on OTC
- SEC evidence covered
- 13D/G, 13F, and 3/4/5
- Largest SEC-reported holder
- REGAL PARTNERS HOLDINGS PTY LTD
- Latest 13D/G holder
- REGAL PARTNERS HOLDINGS PTY LTD
- Latest parsed evidence date
- 31 Mar 2026
- CIK
- 0001949257
- Location
- Carlton Vic
Ownership snapshot
2 signals
Issuer
2 identity fields
Ownership snapshot
Top shareholders of Radiopharm Theranostics Ltd (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
REGAL PARTNERS HOLDINGS P...
Disclosed value leader
REGAL PARTNERS HOLDINGS P...
Comparable rows
9/14
Latest evidence
31 Mar 2026
13D/G
13F
3/4/5
Lead comparable stake: 9%
5 rows are not safely comparable across share classes.
13D/G row: REGAL PARTNERS HOLDINGS PTY LTD
Showing 1-8 of 14 holder rows.
Quick read
REGAL PARTNERS HOLDINGS PTY LTD leads the comparable SEC ownership view at 9%.
9 of 14 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Comparable ownership
Top 5
REGAL PARTNERS HOLDINGS PTY LTD
9%
JPMORGAN CHASE & CO
4%
Stonepine Capital Management, LLC
1.4%
SILVERARC CAPITAL MANAGEMENT, LLC
0.01%
HSBC HOLDINGS PLC
0%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-8 of 14 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| REGAL PARTNERS HOLDINGS PTY LTD |
13D/G
Regal Partners Holdings Pty Limited
|
9%
|
$1,362,952,390
320,694,680 shares
|
+$629,253,691 | 31 Dec 2025 |
| JPMORGAN CHASE & CO |
13D/G
|
4%
|
—
145,679,951 shares
|
$0 | 31 Dec 2025 |
| Stonepine Capital Management, LLC |
13F
Company
|
1.4%
|
$738,977
51,000,000 shares
|
— | 31 Mar 2026 |
| SILVERARC CAPITAL MANAGEMENT, LLC |
13F
Company
|
0.01%
|
$805,846
187,406 shares
|
— | 31 Mar 2026 |
| HSBC HOLDINGS PLC |
13F
Company
|
0%
|
$264,513
61,372 shares
|
— | 31 Mar 2026 |
| Regal Partners Ltd |
13F
Company
|
0%
|
$172,593
40,138 shares
|
— | 31 Mar 2026 |
| PNC FINANCIAL SERVICES GROUP, INC. |
13F
Company
|
0%
|
$68,800
16,000 shares
|
— | 31 Mar 2026 |
| UBS Group AG |
13F
Company
|
0%
|
$12,900
3,000 shares
|
— | 31 Mar 2026 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
Forms 3/4/5 flow
Insider trading overview
Insider buy and sell flow is broadly balanced over the last 12 months. No Buy or Sell transactions have been reported since 03 Jun 2025.
Buys
$0
Insiders: 0
Sells
$0
Insiders: 0
Net
$0
Shares: 0
Window
Last 12 months
4 rolling buckets
Buy value
Sell value
Shares: 0
Shares: 0
| Window (months) | Buy shares | Sell shares | Buy value | Sell value | Net value |
|---|---|---|---|---|---|
| 0-3 | 0 | 0 | $0 | $0 | $0 |
| 3-6 | 0 | 0 | $0 | $0 | $0 |
| 6-9 | 0 | 0 | $0 | $0 | $0 |
| 9-12 | 0 | 0 | $0 | $0 | $0 |
Reporting owners
Insider holders from Forms 3/4/5
Showing 1-8 of 8 reporting-owner rows connected to Radiopharm Theranostics Ltd. Open a relationship link for the CIK-to-CIK filing trail.
Rows
8
Largest Forms 3/4/5 holder
Bruce Michael Goodwin
Net 12M change
$0
Latest report
18 Mar 2026
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| Bruce Michael Goodwin | Director | Mixed | 18 Mar 2026 | |||
| Hester Denise Larkin | Director | Mixed | 18 Mar 2026 | |||
| Riccardo Canevari | Managing Director and CEO, Director | Mixed | 18 Mar 2026 | |||
| Ian Lawrence Turner | Director | Mixed | 18 Mar 2026 | |||
| Noel Donnelly | Director | Mixed | 18 Mar 2026 | |||
| Aaron James Laurita | Chief Financial Officer | Mixed | 18 Mar 2026 | |||
| Paul Hopper | Director | Mixed | 18 Mar 2026 | |||
| Dimitris Voliotis | Chief Medical Officer | Mixed | 18 Mar 2026 |
Recent insider transactions for Radiopharm Theranostics Ltd
Showing up to 300 recent insider transactions from the last 12 months.
| Insider | Symbol | Class | Transaction | % | SEC-reported value | SEC-reported price | Shares | Shares owned | Date | Ownership |
|---|---|---|---|---|---|---|---|---|---|---|
| Paul Hopper | RADX | Ordinary Shares | 0 | 93,571,428 | 18 Mar 2026 | Held through Kilinwata Investments Pty Ltd, of which Mr. Hopper is the sole Shareholder and Director | ||||
| Paul Hopper | RADX | Ordinary Shares | 0 | 250,000 | 18 Mar 2026 | Held by Deborah Coleman, who is Mr. Hopper's spouse. | ||||
| Paul Hopper | RADX | Ordinary Shares | 0 | 53,900,000 | 18 Mar 2026 | Direct | ||||
| Aaron James Laurita | RADX | Ordinary Shares | 0 | 26,357 | 18 Mar 2026 | Direct | ||||
| Ian Lawrence Turner | RADX | Ordinary Shares | 0 | 3,000,000 | 18 Mar 2026 | Held through the Turner Discretionary Trust, of which Mr. Turner is the sole beneficiary | ||||
| Ian Lawrence Turner | RADX | Ordinary Shares | 0 | 6,985,292 | 18 Mar 2026 | Direct | ||||
| Riccardo Canevari | RADX | Ordinary Shares | 0 | 22,679,986 | 18 Mar 2026 | Direct | ||||
| Hester Denise Larkin | RADX | Ordinary Shares | 0 | 644,247 | 18 Mar 2026 | Direct |
* marks a reported price that did not pass the local price check.