As of November 6, 2026, Lantheus Holdings, Inc. is a publicly traded company (Nasdaq: LNTH); its largest reported holder is Farallon Capital Management, L.L.C., with 8.6% on Schedule 13G/A of August 13, 2026, then Dapice Joshua J. (8.2%). The largest insider holding is Lantheus Holdings, Inc., a 10% owner, with 11,273,364 shares (17.2% of shares outstanding), per Form 4 of September 8, 2026 (Schedule 13G/A, August 13, 2026).
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Is Lantheus Holdings, Inc. a real, registered company?
- Lantheus Holdings, Inc. files with the SEC under CIK 1521036 (its SEC filings).
- Its shares are listed under the ticker LNTH on Nasdaq (SEC company record).
- Incorporated in Delaware; business address in Bedford, Massachusetts, as its SEC filings state.
- Court and bankruptcy records: see Before you sign or pay below.
Before you sign or pay
- Court and bankruptcy: No federal court case or bankruptcy filing found under LANTHEUS HOLDINGS INC in our court records and SEC 8-K records (as of 2026-11-06).
- Ownership: 5%+ holders are reported on Schedule 13D or 13G; the latest names Farallon Capital Management, L.L.C. (filed 2026-08-13).
Who are Lantheus Holdings, Inc.'s owners and officers?
Lantheus Holdings, Inc.: incorporated in Delaware; business address in Bedford, Massachusetts; industry In Vitro & In Vivo Diagnostic Substances (Schedule 13G/A, 2026-11-05).
| Report | Holder | Share |
|---|---|---|
| Schedule 13G/A, 2026-11-05 | Fmr LLC | 0.2% |
| Schedule 13G/A, 2026-10-30 | Vanguard Portfolio Management | 4.88% |
| Schedule 13G/A, 2026-08-13 | Farallon Capital Management, L.L.C. | 8.6% |
| Schedule 13G, 2026-07-31 | Vanguard Portfolio Management | 5.06% |
| Schedule 13G/A, 2026-05-15 | Janus Henderson Group PLC | 7.4% |
| Schedule 13G, 2026-04-30 | Vanguard Capital Management | 5.25% |
| Schedule 13G/A, 2026-03-27 | The Vanguard Group | 0% |
| Schedule 13G/A, 2026-02-17 | Janus Henderson Group PLC | 8.6% |
| Schedule 13G/A, 2026-02-12 | Morgan Stanley | 2.5% |
| Schedule 13G/A, 2026-02-05 | Dapice Joshua J. | 8.2% |
| Schedule 13G/A, 2025-11-14 | Janus Henderson Group PLC | 9.8% |
| Schedule 13G/A, 2025-11-12 | Dapice Joshua J. | 5.1% |
Questions about who owns Lantheus Holdings, Inc.
Who owns Lantheus Holdings, Inc.?
On this page, 4 holders' latest ownership filings report 5% or more of Lantheus Holdings, Inc.: Farallon Capital Management, L.L.C. (8.6%, Schedule 13G/A, filed 2026-08-13), Dapice Joshua J. (8.2%, Schedule 13G/A, filed 2026-02-05), Janus Henderson Group PLC (7.4%, Schedule 13G/A, filed 2026-05-15) and Vanguard Capital Management (5.25%, Schedule 13G, filed 2026-04-30).
Who are the largest shareholders of Lantheus Holdings, Inc.?
By the share each holder's latest filing reports, the largest holders of Lantheus Holdings, Inc. on this page are Farallon Capital Management, L.L.C. (8.6%), Dapice Joshua J. (8.2%) and Janus Henderson Group PLC (7.4%).
When did Farallon Capital Management, L.L.C. buy into Lantheus Holdings, Inc.?
The filings give report dates, not purchase dates. The earliest filing from Farallon Capital Management, L.L.C. on this page is the Schedule 13G/A, filed 2026-08-13, reporting 8.6%. That earliest filing is itself an amendment, which updates an earlier report.
Is this an audit or a full list?
Neither. The ownership list on this page covers only Schedule 13D and 13G filings, which holders make once they own 5% or more of a class of shares (an amendment can report a stake that has since fallen below 5%); 12 such filings are shown here. It is not an audit and not a full cap table: holders who never reached 5% are not listed, and a stake can change after its latest filing.
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What the Full Report on Lantheus Holdings, Inc. covers
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Which insiders own Lantheus Holdings, Inc. shares?
Directors, officers and holders of 10% or more report their shares on Forms 3, 4 and 5. Each line is the latest such report, largest holding first.
- Lantheus Holdings, Inc., a 10% owner: 11,273,364 shares (17.2% of shares outstanding), on a joint filing (Form 4, 2026-09-08).
- Lantheus Alpha Therapy, LLC, a 10% owner: 11,273,364 shares (17.2% of shares outstanding), on a joint filing (Form 4, 2026-09-08).
- Thomas G. Roberts Jr.: 3,477,227 shares (5.3% of shares outstanding), held indirectly (the form names the holder only in its footnotes), on a joint filing (Form 4, 2025-08-21).
- Mark C. Wehrly: 3,477,227 shares (5.3% of shares outstanding), held indirectly (the form names the holder only in its footnotes), on a joint filing (Form 4, 2025-08-21).
- Andrew J. M. Spokes: 3,477,227 shares (5.3% of shares outstanding), held indirectly (the form names the holder only in its footnotes), on a joint filing (Form 4, 2025-08-21).
Shares outstanding: 65,401,413 as of 2026-11-02, from the company's latest SEC cover page.
How much has Lantheus Holdings, Inc. raised?
No fundraising or offering filing from Lantheus Holdings, Inc. is on file with us.
Keep reading
More on Lantheus Holdings, Inc. and the records around it.
Lantheus Holdings, Inc. elsewhere on the record
- 5%+ stake filings Nov 2026
Companies that share a holder
- Farallon Capital Management, L.L.C. also filed stake reports on 18 other companies: EXELIXIS, INC. (Nov 2026), ENANTA PHARMACEUTICALS INC (Aug 2026), InflaRx N.V. (Aug 2026)
- Farallon Capital Partners, L.P. also filed stake reports on 19 other companies: BridgeBio Pharma, Inc. (May 2026), InflaRx N.V. (May 2026), Beta Bionics, Inc. (May 2026)
- JANUS HENDERSON GROUP PLC also filed stake reports on 104 other companies: SURGERY PARTNERS, INC. (Nov 2026), EYEPOINT, INC. (Sep 2026), TELEFLEX INCORPORATED (Sep 2026)
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