8-K current report · filed May 14, 2026

Biogen (BIIB) 8-K Current Report: May 14, 2026

Item 1.01Item 2.01Item 2.03Item 7.01BIIB overviewOriginal on SEC EDGAR

Short answer

Biogen (BIIB) filed an 8-K current report with the SEC on May 14, 2026 reporting Item 1.01 (Entry into a Material Definitive Agreement), Item 2.01 (Completion of Acquisition or Disposition of Assets), Item 2.03 (Creation of a Direct Financial Obligation), Item 7.01 (Regulation FD Disclosure). $2B unsecured term loan funds portion of Apellis acquisition consideration.

Biogen 8-K event analysis

AI summary of each reported item and its exhibits

Item 1.01 · Entry into a Material Definitive Agreement

  • $2B unsecured term loan funds portion of Apellis acquisition consideration
  • Tranche A: $1B due May 12, 2027; Tranche B: $1B due May 12, 2028
  • Term SOFR margins of 0.750% for Tranche A and 0.750%-1.000% for Tranche B
  • Quarterly maximum consolidated leverage ratio 3.75x, temporarily expandable to 4.25x for qualifying acquisitions
  • Apellis CVRs offer up to $4 per CVR based on SYFOVRE sales milestones of $1.5B and $2B during 2027-2031

Item 2.01 · Completion of Acquisition or Disposition of Assets

  • Biogen completed its Apellis acquisition on May 14, 2026, making Apellis a wholly owned subsidiary without an Apellis shareholder vote
  • 105.7 million shares tendered, representing approximately 82.4% of Apellis shares outstanding
  • Transaction consideration: $41 per share plus one CVR worth up to $4 per share upon specified milestones
  • Upfront purchase cost approximately $5.3 billion, excluding fees, expenses, and CVR payments
  • Maximum CVR exposure estimated at approximately $582 million, increasing potential acquisition consideration if milestones are achieved

Item 2.03 · Creation of a Direct Financial Obligation

  • Item 2.03 references Biogen’s May 14, 2026 press release announcing consummation of the Merger
  • Merger completion may create or alter Biogen’s financial obligations, requiring review of Exhibit 99.1 for transaction terms
  • No debt amount, interest rate, maturity, or borrowing purpose disclosed in the provided text

Item 7.01 · Regulation FD Disclosure

  • Item 7.01 contains only standard Regulation FD filing language
  • No substantive company disclosure or investor-actionable information provided

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