8-K current report · filed Sep 22, 2026

Celldex Therapeutics, Inc. (CLDX) 8-K Current Report: September 22, 2026

Item 8.01Item EX-99.1CLDX overview

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Celldex Therapeutics, Inc. (CLDX) filed an 8-K current report with the SEC on September 22, 2026 reporting Item 8.01 (Other Events), Item EX-99.1 (Exhibit EX-99.1). Phase 3 EMBARQ-CSU1 and EMBARQ-CSU2 results announced for barzolvolimab in chronic spontaneous urticaria.

Celldex Therapeutics, Inc. 8-K event analysis

AI summary of each reported item and its exhibits

Item 8.01 · Other Events

  • Phase 3 EMBARQ-CSU1 and EMBARQ-CSU2 results announced for barzolvolimab in chronic spontaneous urticaria
  • Clinical readout is material to barzolvolimab’s regulatory path and Celldex’s commercial prospects
  • Full efficacy, safety, and trial results in Exhibit 99.1

Item EX-99.1 · Exhibit EX-99.1

  • Phase 3 EMBARQ-CSU1 and CSU2 met primary and all key secondary endpoints, materially reducing barzolvolimab’s clinical risk
  • Complete response at Week 24 reached 49.0%-54.0% versus 15.4%-17.6% for placebo, supporting competitive differentiation
  • Benefits extended to omalizumab-refractory patients and those with angioedema, expanding potential addressable CSU populations
  • Favorable safety profile through 24 weeks, with treatment continuing to Week 52
  • BLA submission planned for 2027, advancing Celldex toward potential commercial-stage operations and future launch costs

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