Corporate Presentation August 2025 Cautionary note regarding forward-looking statements This presentation contains forward-looking statements. These statements may be identified by the use of words such as, but not limited to, "anticipate," "believe," "become," "continue," "could," "design," "estimate," "expect," "intend," "may," "might," "on track," "plan," "potential," "predict," "project," "should," "target," "will," or "would" or other similar terms or expressions that concern our expectations, plans an ...

Thyroid Eye Disease (TED) Portfolio - Veligrotug (Intravenous) - Positive THRIVE and THRIVE-2 topline data in active and chronic TED showed a robust clinical profile[12] - In the THRIVE trial, 70% of patients receiving veligrotug achieved a proptosis response at 15 weeks, compared to 5% on placebo[57] - In the THRIVE trial, 53% of patients receiving veligrotug achieved a proptosis response at 3 weeks, after just 1 infusion[59] - In the THRIVE-2 trial (chronic TED), 56% of patients achieved a proptosis response compared to 8% in the placebo group[78] - Viridian plans to submit the BLA for veligrotug in the second half of 2025 and the EU MAA in the first half of 2026[3, 12] Thyroid Eye Disease (TED) Portfolio - VRDN-003 (Subcutaneous) - REVEAL-1 and REVEAL-2 trials are enrolling and dosing patients, with topline data expected in the first half of 2026[12] - The BLA submission for VRDN-003 is anticipated by year-end 2026[3, 12] - Phase 1 HV Study showed VRDN-003 has an extended half-life of 40–50 days and increases IGF-1 levels ~4-fold[102, 104] FcRn Inhibitor Portfolio - VRDN-006 proof-of-concept Phase 1 clinical trial data is expected in Q3 2025[3, 12] - VRDN-008 is on track for IND submission by year-end 2025[3, 12] - A single dose of VRDN-008 demonstrated a longer half-life and deeper IgG reduction compared to efgartigimod in NHPs[148, 149] Financial - Viridian had $637 million in cash as of March 31, 2025, providing a runway into the second half of 2027[12]