Lantheus Holdings, Inc. SEC filings

Filings

Every filing, newest first. MAJOR and NOTABLE filings lead the app's feed; ROUTINE ones are kept here.

1. MAJOR8-KLantheus Holdings, Inc.LNTH4d

   Lantheus approves merger agreement

   • 55,457,863 votes for merger agreement
   • 1,563,807 votes against merger agreement
   • 57,184,503 shares voted in special meeting
2. ROUTINEDEFA14ALantheus Holdings, Inc.LNTHOct 2

   Lantheus Holdings announces merger details

   • Merger with Curium US Holdings LLC
   • Special meeting on October 14, 2026
   • Supplemental disclosures added to proxy statement
3. ROUTINE8-KLantheus Holdings, Inc.LNTHOct 2

   Lantheus announces merger details

   • Merger with Curium US Holdings LLC
   • Proxy statement filed for October 14, 2026 shareholder vote
   • Three lawsuits filed over merger disclosures
4. NOTABLESCHEDULE 13D/APerspective Therapeutics, Inc.CATXSep 23

   Ownership stake disclosure by Lantheus Holdings, Inc. (amended)

   Lantheus Holdings, Inc., filed by

5. ROUTINEDEFA14ALantheus Holdings, Inc.LNTHSep 21

   Additional proxy materials

6. ROUTINE8-KLantheus Holdings, Inc.LNTHSep 21

   Current report

7. ROUTINEDEFA14ALantheus Holdings, Inc.LNTHSep 17

   Additional proxy materials

8. ROUTINE4Perspective Therapeutics, Inc.CATXSep 8

   Lantheus Holdings, Inc., insider filing for CATX

   Lantheus Holdings, Inc., reporting · Lantheus Alpha Therapy, LLC, reporting

9. NOTABLEDEFM14ALantheus Holdings, Inc.LNTHSep 8

   Merger proxy statement

10. ROUTINE4Perspective Therapeutics, Inc.CATXSep 4

    Lantheus Holdings, Inc., insider filing for CATX

    Lantheus Holdings, Inc., reporting · Lantheus Alpha Therapy, LLC, reporting

11. NOTABLESCHEDULE 13D/APerspective Therapeutics, Inc.CATXSep 4

    Ownership stake disclosure by Lantheus Holdings, Inc. (amended)

    Lantheus Holdings, Inc., filed by

12. ROUTINESCHEDULE 13GRadiopharm Theranostics LtdRDPTFSep 4

    Ownership stake disclosure by Lantheus Holdings, Inc.

    Lantheus Holdings, Inc., filed by

13. NOTABLESCHEDULE 13DRadiopharm Theranostics LtdRDPTFSep 4

    Ownership stake disclosure by Lantheus Holdings, Inc.

    Lantheus Holdings, Inc., filed by

14. ROUTINE4Perspective Therapeutics, Inc.CATXSep 3

    Lantheus Holdings, Inc., insider filing for CATX

    Lantheus Holdings, Inc., reporting

15. ROUTINE4Perspective Therapeutics, Inc.CATXSep 2

    Lantheus Holdings, Inc., insider filing for CATX

    Lantheus Holdings, Inc., reporting

16. ROUTINE4Lantheus Holdings, Inc.LNTHSep 2

    Robert J. Marshall Jr., insider filing for LNTH

    Robert J. Marshall Jr., reporting

17. ROUTINES-8Lantheus Holdings, Inc.LNTHSep 2

    Employee stock plan registration

18. NOTABLEPREM14ALantheus Holdings, Inc.LNTHAug 26

    PREM14A filing

19. ROUTINE4Lantheus Holdings, Inc.LNTHAug 19

    2 insider filings

    Kimberly Brown, insider filing for LNTH

    Show all 2

    • 4Insider filing for LNTHAug 19
    • 4Insider filing for LNTHAug 19

    Kimberly Brown, reporting

20. ROUTINEDEFA14ALantheus Holdings, Inc.LNTHAug 13

    Additional proxy materials

21. ROUTINESCHEDULE 13G/ALantheus Holdings, Inc.LNTHAug 13

    Ownership stake disclosure by FARALLON CAPITAL MANAGEMENT, L.L.C. (amended)

    FARALLON CAPITAL MANAGEMENT, L.L.C., filed by

22. NOTABLE10-QLantheus Holdings, Inc.LNTHAug 6

    Quarterly report

23. ROUTINE8-KLantheus Holdings, Inc.LNTHAug 6

    Current report

24. ROUTINEDEFA14ALantheus Holdings, Inc.LNTHAug 4

    Additional proxy materials

25. ROUTINE8-KLantheus Holdings, Inc.LNTHAug 4

    Current report

26. ROUTINEDEFA14ALantheus Holdings, Inc.LNTHAug 4

    Additional proxy materials

27. ROUTINEDEFA14ALantheus Holdings, Inc.LNTHAug 3

    Additional proxy materials

28. ROUTINEDEFA14ALantheus Holdings, Inc.LNTHAug 3

    Additional proxy materials

29. ROUTINE8-KLantheus Holdings, Inc.LNTHAug 3

    Current report

30. ROUTINESCHEDULE 13GLantheus Holdings, Inc.LNTHJul 31

    Ownership stake disclosure by VANGUARD PORTFOLIO MANAGEMENT LLC

    VANGUARD PORTFOLIO MANAGEMENT LLC, filed by

31. ROUTINE4Lantheus Holdings, Inc.LNTHJun 3

    2 insider filings

    Mary Anne Heino, insider filing for LNTH

    Show all 2

    • 4Insider filing for LNTHJun 3
    • 4Insider filing for LNTHJun 3

    Mary Anne Heino, reporting

32. ROUTINESDLantheus Holdings, Inc.LNTHMay 29

    Conflict minerals report

33. ROUTINE4Lantheus Holdings, Inc.LNTHMay 18

    9 insider filings

    Julie McHugh, insider filing for LNTH

    Show all 9

    • 4Insider filing for LNTHMay 18
    • 4Insider filing for LNTHMay 18
    • 4Insider filing for LNTHMay 18
    • 4Insider filing for LNTHMay 18
    • 4Insider filing for LNTHMay 18
    • 4Insider filing for LNTHMay 18
    • 4Insider filing for LNTHMay 18
    • 4Insider filing for LNTHMay 18
    • 4Insider filing for LNTHMay 18

    Julie McHugh, reporting

34. ROUTINESCHEDULE 13G/ALantheus Holdings, Inc.LNTHMay 15

    Ownership stake disclosure by JANUS HENDERSON GROUP PLC (amended)

    JANUS HENDERSON GROUP PLC, filed by

35. NOTABLE10-QLantheus Holdings, Inc.LNTHMay 7

    Quarterly report

36. ROUTINE8-KLantheus Holdings, Inc.LNTHMay 7

    Current report

37. ROUTINE8-KLantheus Holdings, Inc.LNTHMay 1

    Current report

38. ROUTINESCHEDULE 13GLantheus Holdings, Inc.LNTHApr 30

    Ownership stake disclosure by VANGUARD CAPITAL MANAGEMENT LLC

    VANGUARD CAPITAL MANAGEMENT LLC, filed by

39. ROUTINE4Lantheus Holdings, Inc.LNTHApr 21

    Daniel Niedzwiecki, insider filing for LNTH

    Daniel Niedzwiecki, reporting

40. ROUTINESCHEDULE 13G/ALantheus Holdings, Inc.LNTHMar 27

    Ownership stake disclosure by VANGUARD GROUP INC (amended)

    VANGUARD GROUP INC, filed by

Older filings on EDGAR