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Lantheus Holdings, Inc. SEC filings

In the twelve months since 9 October 2025 Lantheus Holdings, Inc. filed 28 documents with the SEC of the kinds listed here: 10 current reports (8-K), about 4 results of operations; 4 officer or director change; 3 other events; 2 regulation fd disclosure; 1 material agreement; 9 additional proxy materials (DEFA14A), 3 quarterly reports (10-Q), 1 employee share plan registration (S-8), 1 conflict minerals report (SD), 1 annual report to shareholders (ARS), 1 proxy statement (DEF 14A). The latest, filed 2 October 2026: DEFA14A, additional proxy material.

FiledFormWhat it was aboutPeriod or event dateFiling
2 October 2026DEFA14Aadditional proxy materialEDGAR
2 October 20268-KOther events2 October 2026EDGAR
21 September 2026DEFA14Aadditional proxy materialEDGAR
21 September 20268-KOther events17 September 2026EDGAR
17 September 2026DEFA14Aadditional proxy materialEDGAR
2 September 2026S-8employee share plan registrationEDGAR
13 August 2026DEFA14Aadditional proxy materialEDGAR
6 August 202610-Qquarterly report30 June 2026EDGAR
6 August 20268-KResults of operations6 August 2026EDGAR
4 August 2026DEFA14Aadditional proxy materialEDGAR
4 August 2026DEFA14Aadditional proxy materialEDGAR
4 August 20268-KMaterial agreement, Officer or director change1 August 2026EDGAR
3 August 2026DEFA14Aadditional proxy materialEDGAR
3 August 2026DEFA14Aadditional proxy materialEDGAR
3 August 20268-KRegulation FD disclosure, Other events3 August 2026EDGAR
29 May 2026SDconflict minerals reportEDGAR
7 May 202610-Qquarterly report31 March 2026EDGAR
7 May 20268-KResults of operations7 May 2026EDGAR
1 May 20268-KChange to security holders' rights, Officer or director change, Charter or bylaw amendment, or fiscal year change, Shareholder vote30 April 2026EDGAR
20 March 2026ARSannual report to shareholders31 December 2025EDGAR
20 March 2026DEFA14Aadditional proxy materialEDGAR
20 March 2026DEF 14Aproxy statement30 April 2026EDGAR
10 March 2026PRE 14Apreliminary proxy30 April 2026EDGAR
26 February 202610-Kannual report31 December 2025EDGAR
26 February 20268-KResults of operations26 February 2026EDGAR
12 November 20258-KOfficer or director change6 November 2025EDGAR
6 November 202510-Qquarterly report30 September 2025EDGAR
6 November 20258-KResults of operations, Officer or director change, Regulation FD disclosure31 October 2025EDGAR
An 8-K is what a company files within four business days of a material event; the SEC numbers the events, and the words here are the SEC's own headings, shortened.
Read moreForm 4, Form 144, 13F and Schedule 13D and 13G have their own pages. Prospectus supplements and correspondence are not listed.

Source

The company's filing index on EDGAR, read from the SEC's submissions feed.

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