Quick Takeaways
- JANUS HENDERSON GROUP PLC filed SCHEDULE 13G/A for LANTHEUS HOLDINGS, INC. Common Stock (LNTH).
- Disclosed ownership: 8.6%.
- Date of event: 31 Dec 2025.
JANUS HENDERSON GROUP PLC - 31 Dec 2025 SCHEDULE 13G/A Report for LANTHEUS HOLDINGS, INC. Common Stock (LNTH)
- Filing Manager
- JANUS HENDERSON GROUP PLC
- Reporting Manager
- JANUS HENDERSON GROUP PLC
- Security
- LANTHEUS HOLDINGS, INC. Common Stock
- Symbol
- LNTH
- Shares outstanding
- 66,363,337 shares
- Disclosed Ownership
- 5,707,247 shares
- Ownership
- 8.6%
- Form type
- SCHEDULE 13G/A
- Filing time
- 17 Feb 2026, 16:34:07 UTC
- Date of event
- 31 Dec 2025
- Previous filing
- 14 Nov 2025
- SEC
- View on sec.gov
Quoteable Key Fact
"JANUS HENDERSON GROUP PLC disclosed 8.6% ownership in LANTHEUS HOLDINGS, INC. Common Stock (LNTH) on 31 Dec 2025."
What Changed
- Previous schedule filing date: 14 Nov 2025.
- Current filing was accepted on 17 Feb 2026, 16:34.
Why This Matters
- This page explains what this Schedule 13D/13G filing tells you before manager-level rows.
- You can verify ownership claims directly against the original SEC filing.
Source Evidence
Backed by Schedule 13D/13G
See Original Filing
Beneficial ownership values are sourced from the original SEC Schedule 13D/13G filing.
Reporting Managers (1)
| Name | Ownership | Shares Owned | sole voting power | shared voting power | Signature | Title | CIK |
|---|---|---|---|---|---|---|---|
| JANUS HENDERSON GROUP PLC | 8.6% | 5,707,247 | 0 | 5,707,247 | Kristin Mariani | Head of North America Compliance |