Niedzwiecki Daniel 4

What Happened

• Daniel Niedzwiecki, Chief Administrative Officer, General Counsel and Corporate Secretary of Lantheus Holdings, received a grant of 36,692 restricted stock units (RSUs/PSUs) on 2026-03-05 (acquired at $0.00). To satisfy tax withholding on the grant, 1,283 shares were disposed (withheld/sold) at $76.31 each for proceeds of $97,906.
• The award itself has no immediate cash cost (grant value reported as $0 on acquisition), while the 1,283-share disposal was a tax withholding/cashless mechanism rather than an open-market sale for investment purposes.

Key Details

• Transaction date: 2026-03-05; filing date: 2026-03-09.
• Grant: 36,692 RSUs/PSUs @ $0.00 (acquired); Withholding/disposal: 1,283 shares @ $76.31 = $97,906 (code F for tax withholding).
• Shares owned after transaction: not specified in the provided report.
• Footnote: Award consists of 18,346 RSUs vesting in equal installments over 3 years and 18,346 Total Shareholder Return performance-based RSUs (PSUs) that cliff vest after a 3-year performance period; PSU payout can range from 0%–200% of target based on performance.
• Timeliness: Report filed 4 days after the transaction date; this may be later than the standard 2-business-day Section 16 filing window.

Context

• This was an equity award grant (not a purchase). The 1,283-share disposition was a routine tax withholding/cashless transaction to cover withholding obligations and should not be read as a directional market sell by the insider.
• PSUs are performance-based and may ultimately pay out more or less than the target award depending on performance at the end of the period.