8-K current report · filed Apr 28, 2026

Aclaris Therapeutics, Inc. (ACRS) 8-K Current Report: April 28, 2026

Item 7.01Item 8.01Item EX-99.1ACRS overview

Short answer

Aclaris Therapeutics, Inc. (ACRS) filed an 8-K current report with the SEC on April 28, 2026 reporting Item 7.01 (Regulation FD Disclosure), Item 8.01 (Other Events), Item EX-99.1 (Exhibit EX-99.1). Filing contains only standard Regulation FD exhibit-disclaimer language.

Aclaris Therapeutics, Inc. 8-K event analysis

AI summary of each reported item and its exhibits

Item 7.01 · Regulation FD Disclosure

  • Filing contains only standard Regulation FD exhibit-disclaimer language
  • No substantive business, financial, or investor-impacting disclosure in the provided text

Item 8.01 · Other Events

  • Press release announced ATI-052 results and an ATI-2138 trial update
  • Clinical-program disclosure potentially relevant to Aclaris’s pipeline valuation and development outlook
  • Full efficacy, safety, and trial details available in Exhibit 99.2

Item EX-99.1 · Exhibit EX-99.1

  • ATI-052 Phase 1 SAD/MAD results support extended dosing, with estimated 45-day half-life and potential up-to-quarterly administration
  • Complete or near-complete TSLP and IL-4 inhibition sustained up to five months at 240mg and 480mg MAD doses
  • Favorable safety profile across cohorts, with no serious adverse events, discontinuations, Grade 3 drug-related events, or conjunctivitis
  • Phase 1b asthma and atopic dermatitis readouts expected 2H 2026, with Phase 2b asthma program targeted for 4Q 2026
  • ATI-2138 Phase 2b lichen planus trial planned for 2H 2026, targeting an estimated $1B-$4B peak U.S. revenue opportunity

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