SCHEDULE: Vanguard Portfolio Management Adjusts Lantheus Holdings Stake

Vanguard Portfolio Management has reported a change in its beneficial ownership of Lantheus Holdings Inc. common stock, now holding 4.88% of the class.

Summary

• Vanguard Portfolio Management, along with its affiliates Vanguard Fiduciary Trust Company and Vanguard Global Advisers, LLC, has filed an amendment to its Schedule 13G.
• The filing indicates a change in beneficial ownership of Lantheus Holdings Inc. common stock.
• As of September 30, 2026, Vanguard Portfolio Management beneficially owns 3,189,870 shares, representing 4.88% of the class of securities.
• This ownership includes shares held by Vanguard funds and other managed accounts where Vanguard Portfolio Management exercises dispositive power.
• The filing confirms that no single other person's interest in the reported securities exceeds 5%.

Sentiment

Score: 6

Explanation: StockSavvy.ai views this as a neutral filing, primarily reporting a change in beneficial ownership percentage that remains within expected thresholds for institutional investors.

Positives

• Vanguard Portfolio Management maintains a significant but not controlling stake in Lantheus Holdings Inc.
• The filing indicates that the securities were acquired and are held in the ordinary course of business, not for the purpose of influencing control.

Negatives

• The filing does not contain specific financial performance data or strategic updates for Lantheus Holdings Inc., focusing solely on ownership changes.

Risks

• Potential for future changes in Vanguard's stake, which could impact market dynamics.
• Concentration of ownership among large institutional investors can sometimes lead to less diversified shareholder interests.

Future Outlook

The filing does not contain forward-looking statements or guidance regarding Lantheus Holdings Inc.'s future performance. It solely reports on ownership.

Management Comments

• "In accordance with SEC Release No. 34-39538 (January 12, 1998), this Schedule 13G reflects the securities beneficially owned, or deemed to be beneficially owned, by Vanguard Portfolio Management LLC and the following affiliates of Vanguard Portfolio Management LLC or business divisions of such affiliates: Vanguard Fiduciary Trust Company and Vanguard Global Advisers, LLC."
• "This Schedule 13G includes securities held by Vanguard funds, or sleeves thereof, over which Vanguard Portfolio Management LLC exercises dispositive power, in addition to securities held by clients over which the affiliates or business divisions of such affiliates indicated above exercise dispositive and/or voting power."
• "This Schedule 13G does not include securities, if any, beneficially owned by other subsidiaries or affiliates of Vanguard Portfolio Management LLC, or business divisions of such subsidiaries whose ownership of securities is disaggregated from that of the reporting business unit in accordance with such release."
• "By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under 240.14a-11."

Industry Context

StockSavvy.ai notes that this filing is typical for large institutional investors like Vanguard, which continuously adjust their holdings across various public companies. The 4.88% stake suggests a significant investment but falls below the threshold that typically triggers more stringent reporting or active control considerations.

Stakeholder Impact

• Shareholders: The change in beneficial ownership by a major institutional investor may influence market perception and trading activity, though the current stake is below a control threshold.
• Management of Lantheus Holdings Inc.: While not a direct control stake, significant institutional ownership can lead to engagement on corporate governance and strategy.

Next Steps

• Vanguard Portfolio Management will continue to monitor its holdings and may adjust its stake in Lantheus Holdings Inc. based on investment strategies and market conditions.
• Lantheus Holdings Inc. will continue its business operations as disclosed in its other filings.

Key Dates

Keywords

Lantheus Holdings, Vanguard Portfolio Management, Schedule 13G, Beneficial Ownership, Institutional Investor, Common Stock, Securities Exchange Act