Radiopharm Theranostics Limited
Radiopharm Theranostics Limited (RADX) Stock Ownership
Institutional vs insider vs public ownership from 13F and float data — top holders, activity, and insider trades below.
SEC 13F · FMP · RADX · as of Sep 30, 2025
Ownership Breakdown
4
Institutional Holders
▼ 1 vs Q2
$1.73M
Total Inst. Value
▲ $148,158 vs Q2
1.29M
Shares Outstanding
freeFloat 63.62%
312,506
13F Shares Held
▼ 27,184 vs Q2
Institutional ownership = 13F shares ÷ total outstanding. Insider % = 100 − free float. Public % = free float − institution %. Data: FMP /symbol-positions-summary + /shares-float + SEC EDGAR.
Top Institutional Holders
RADX largest shareholders · institutional ownership
Q3 2025 · SEC 13F
Showing top 5 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
SILVERARC CAPITAL MANAGEMENT, LLC pharmaceutical preparations | 187.4K | 2.70% | 2.70% | $1.03B | Nov 12, 2025 | — held |
REGAL PARTNERS LTD pharmaceutical preparations | 90.9K | 1.31% | 1.31% | $501.82M | Nov 13, 2025 | — held |
UBS GROUP AG pharmaceutical preparations | 18.2K | 26.22% | 26.22% | $100.41M | Nov 13, 2025 | ▲ 451 |
PNC FINANCIAL SERVICES GROUP, INC. pharmaceutical preparations | 16.0K | 23.07% | 23.07% | $88.32M | Nov 7, 2025 | ▲ 8.0K |
AFFINITY ASSET ADVISORS, LLC pharmaceutical preparations | 0 | 0.00% | 0.00% | $0 | Nov 13, 2025 | EXIT |
Data from SEC Form 13F filings. Ownership bar normalised to largest holder. Change flags: isNew / isSoldOut / changeInSharesNumber (FMP extract-analytics/holder).
Institutional Activity
Q3 2025 vs prior quarter
Q3 2025
2
Increased
+8.5K shares0
New Positions
first time holders0
Decreased
−0 shares1
Sold Out
fully exitedNet shares change (top 50)
+8.5K
+8.5K / −0
Net new holders
+1
0 new / 1 exited
Based on top 50 institutional holders by position size. Fields: isNew, isSoldOut, changeInSharesNumber (FMP extract-analytics/holder, limit=50).
Insider Buying vs Selling
RADX insider trading · insider activity
Source: SEC Form 4
0
Buy transactions
0
Sell transactions
0.00
Buy/Sell ratio
$0M
Total disposed
Recent Insider Transactions
Showing 10 most recent · Common Stock only
No recent insider transactions reported.
Source: /insider-trading/search (FMP stable). Buy/Sell direction: acquisitionOrDisposition A=Buy, D=Sell. RSU vesting (M-Exempt) excluded from sentiment bar. All data from SEC EDGAR public filings.
About institutional & insider ownership
Radiopharm Theranostics Limited (RADX) is primarily owned by institutional investors, who hold approximately 24.3% of total shares outstanding. Company insiders own approximately 36.38%, while retail and public investors account for the remaining 39.36%.
The largest institutional shareholder of Radiopharm Theranostics Limited is SILVERARC CAPITAL MANAGEMENT, LLC, holding approximately 187,406 shares — equal to 2.70% of outstanding shares — as of September 30, 2025.
A total of 4 institutional investors currently hold RADX stock, with a combined institutional value of approximately $1,725,033 as of the most recent 13F filing period.
Frequently asked questions
RADX ownershipRadiopharm Theranostics Limited (RADX) is primarily owned by institutional investors, who hold approximately 24.3% of shares. The largest shareholder is SILVERARC CAPITAL MANAGEMENT, LLC with a 2.70% stake. Company insiders hold 36.38%. Data sourced from SEC Form 13F as of September 30, 2025.