Lantheus Holdings, Inc.

13D and 13G Filings

Issuer	Symbol	CUSIP	% of Class	Shares	Form	Filed
Perspective Therapeutics, Inc. 13D/A Amendment 3 CATX · 46489V302	CATX	46489V302	7.7%	8,739,011	13D/A Amendment 3	9/23/2026 Event 9/21/2026
Lantheus Holdings, Inc.			7.7%	8,739,011
Lantheus Medical Imaging, Inc.			7.7%	8,739,011
Lantheus Alpha Therapy, LLC			7.7%	8,739,011
Perspective Therapeutics, Inc. 13D/A Amendment 2 CATX · 46489V302	CATX	46489V302	10.0%	11,440,513	13D/A Amendment 2	9/4/2026 Event 5/15/2024
Lantheus Holdings, Inc.			10.0%	11,440,513
Lantheus Medical Imaging, Inc.			10.0%	11,440,513
Lantheus Alpha Therapy, LLC			10.0%	11,440,513
Radiopharm Theranostics Limited 13G Q79455103		Q79455103	17.3%	792,958,513	13G	9/4/2026 Event 7/28/2026
Lantheus Omega, LLC			17.3%	792,958,513
Lantheus Medical Imaging, Inc.			17.3%	792,958,513
Lantheus Holdings, Inc.			17.3%	792,958,513
Radiopharm Theranostics Limited 13D Q79455103		Q79455103	20.9%	792,958,513	13D	9/4/2026 Event 11/27/2024
Lantheus Omega, LLC			20.9%	792,958,513
Lantheus Medical Imaging, Inc.			20.9%	792,958,513
Lantheus Holdings, Inc.			20.9%	792,958,513

Includes filings since 12/18/2024, when the SEC began requiring structured 13D and 13G data.