Radiopharm Theranostics Limited (RADX)
Nasdaq: RADX · Pharmaceutical Preparations · filing with the SEC since 2022
Who owns Radiopharm Theranostics Limited
As filed with the SECHolders of 5% or more
2
Lantheus Holdings, Inc. holds 17.3% of Ordinary Shares, no par value per share, as its SCHEDULE 13G filed Sep 4, 2026 says.
Directors and officers
8
report now, of 8 people on the record since 2026. Their holdings as a group are not read here.
Institutions as a whole
n/a
The record does not read the share held by managers that file Form 13F, so none is printed and no split of the rest is estimated. What it holds is the 2 named at left.
Holders of 5% or moreshare of the class, as filed
Lantheus Holdings, Inc.
SCHEDULE 13G · filed Sep 4, 2026 · Ordinary Shares, no par value per share · 20.9% in Sep 4, 2026
Regal Partners Holdings Pty Limited
SCHEDULE 13G · filed Jan 8, 2026 · Ordinary Shares, no par value and American Depositary Shares, each representing three hundred Ordinary Shares, no par value · 7.3% in Jul 23, 2025
JPMorgan Chase & Co.
SCHEDULE 13G/A · filed Jan 16, 2026 · Ordinary Shares, as represented by American Depositary Shares · reported falling below 5%, from 9% in Jul 16, 2025
Regal Partners Funds Management Pty Limited
SCHEDULE 13G · filed Oct 14, 2026 · Ordinary Shares, no par value and American Depositary Shares, each representing three hundred Ordinary Shares, no par value · reported falling below 5%
What RADX reports owning in othersstakes of 5% or more, and other ties
Other ties the annual report names
Radiopharm Ventures LLCMember
An entity · consolidated entity · owns, named in the 20-F filed Sep 30, 2026
Insider tradesForm 4
0sales
0purchases
0sales on a scheduled plan
0people selling
$0sold, in dollars
$0bought, in dollars
Open-market trades on Form 4 from Oct 27, 2025 to Oct 27, 2026. A scheduled plan is a selling program set in advance under SEC rule 10b5-1. The trades are listed as filed and do not feed the grade.
By calendar yearSoldBought
No open-market trade is on the record for these years.
Dollars as filed, summed by the transaction date.
People who traded in the window
No one on the roster filed an open-market trade in the window.