Viridian Therapeutics : Corporate Presentation (Presentation)

VRDN

Corporate Presentation

February 2025

Viridian is building upon proven first market entrants to develop differentiated next-generation products

First-generation product establishes significant opportunity for next-generationstrategy

Identify market opportunities with clear remaining unmet need

Determine key areas of potential product differentiation

Engineer potential best-in-class antibodies and therapeutic proteins

Rapidly advance programs to patients

3

CONFIDENTIAL

Differentiated pipeline: TED portfolio moving towards commercial and FcRn inhibitor portfolio moving towards the clinic

Thyroid Eye Disease (anti-IGF-1R) Portfolio

FcRn-

Targeting

Autoimmune

Portfolio

DISCOVERY PRECLINICAL PHASE 1 PHASE 2 PHASE 3STATUS

Veligrotug

Reported positive

Intravenous

topline data

VRDN-003

Pivotal trials

Subcutaneous

ongoing

VRDN-006

Phase 1 study

FcRn-targeting

ongoing

Fc fragment

VRDN-008

Preclinical

Bispecific, extended

studies ongoing

half-life FcRn inhibitor

4

Fc = fragment crystallizable, FcRn = neonatal Fc receptor, IGF-1R = insulin-like growth factor-1 receptor, TED = thyroid eye disease.

CONFIDENTIAL

Viridian is well positioned to deliver significant catalysts

Anticipated Catalysts

Veligrotug

• Positive THRIVE and THRIVE-2 topline data in active and chronic

TED showed a differentiated clinical profile1

Intravenous

Well positioned to become the IV treatment-of-choice in TED

BLA submission: 2H 2025

EU MAA submission: 1H 2026

PDUFA date & U.S. launch: 2H 2026

VRDN-003

REVEAL-1 and REVEAL-2 enrolling and dosing patients

Subcutaneous

FcRn

• VRDN-006 healthy volunteer data expected in Q3 2025

Portfolio

• VRDN-008 additional preclinical data expected in 2025

Financial

• $718M cash as of December 31, 2024

Runway into 2H 2027

Topline data for both trials: 1H 2026

BLA submission: Year-end2026

Healthy volunteer data: Q3 2025

Additional preclinical data: in 2025

IND submission: Year-end2025

Source: 1 Viridian THRIVE & THRIVE-2 data on file.

BLA = Biologics License Application, CAS = clinical activity score, EU = European Union, FcRn = neonatal Fc receptor, HV = healthy volunteer,

5 IgG = Immunoglobulin G, IND = Investigational New Drug, MAA = Marketing Authorization Application, NHP = non-human primate, PDUFA = Prescription Drug User Fee Act, TED = thyroid eye disease.

CONFIDENTIAL

Near-term anticipated clinical and regulatory catalysts offer potential to drive significant value

Thyroid Eye Disease (anti-IGF-1R)

Veligrotug

Intravenous

BLA

submission

2H 2025

EU MAA

Potential PDUFA

submission

date & launch

1H 2026

2H 2026

Portfolio

VRDN-003

Subcutaneous

Phase 3 topline data for

REVEAL-1 (active TED) & REVEAL-2 (chronic TED)

1H 2026

BLA

submission

YE 2026

2025

2026

FcRn-

Targeting

Autoimmune

Portfolio

VRDN-006

FcRn-targeting Fc fragment

VRDN-008

Bispecific, extended half-life FcRn inhibitor

IgG reduction

PoC in HVs

Q3 2025

Additional

preclinical data

2025

IND

submission

YE 2025

IgG reduction

PoC in HVs

2H 2026

BLA = Biologics License Application, Fc = fragment crystallizable, FcRn = neonatal Fc receptor, HV = healthy volunteers, IGF-1R = insulin-like growth factor-1

6 receptor, IgG = immunoglobulin G, IND = Investigational New Drug, MAA = Marketing Authorization Application, PoC = proof of concept, PDUFA = Prescription Drug User Fee Act, TED = thyroid eye disease.

CONFIDENTIAL

Viridian is building a leadership position in autoimmune disease

Revenue-Funded

Commercial

Growth

Transition

BLA and MAA

2027+

Submission &

Commercial Readiness

2026

VRDN-003

v

BLA

Launch**

Submission*

Active & Chronic TED

Veligrotug v

Advance Potential

BLA

EU MAA

Launch**

Best-in-Class

Submission*

Submission*

Active & Chronic TED

FcRn Portfolio

2025

Continue to Advance and Expand Pipeline

FcRn Portfolio, New Programs

7 * Planned; ** If approved.

BLA = Biologics License Application, FcRn = neonatal Fc receptor, MAA = Marketing Authorization Application, TED = thyroid eye disease.

CONFIDENTIAL

Thyroid Eye Disease (TED) Portfolio

8

TED is an autoimmune condition characterized by inflammation, growth, and damage to tissues around and behind the eyes

Autoantibodies trigger IGF-1R/TSHR pathway1

Normal Eye Anatomy

Thyroid Eye Disease (TED)

Bulging

Eyes

Heterogeneous autoimmune disease with clinical signs and symptoms that can vary or modulate following onset, in some cases for the rest of a patient's life2,3

Main signs include proptosis (eye bulging), redness, swelling, diplopia (double vision), and lid retraction2,3

Severe cases can cause sight-threatening optic nerve compression4

An estimated 190K people in the US alone have moderate to severe TED5

Optic Nerve

Enlargement of extraocular muscles

People living with TED experience proptosis, redness,

swelling, diplopia, and lid retraction

Sources: 1 George A et al. Front Endocrinol (Lausanne). 2021;11:629925., 2 Smith TJ et al. NEJM. 2016;375(16):1552-1565., 3 Bahn RS. NEJM. 2010;

362(8): 726-738., 4 Bartley GB et al. Am J Ophthalmol 1996;121(3):284-290., 5 Viridian-sponsored market research, includes active and chronic TED.

9 TED patient images are from Bahn RS. NEJM. 2010; 362(8): 726-738. Copyright © (2010) Massachusetts Medical Society. Reprinted with permission from Massachusetts Medical Society.

IGF-1R = insulin-growth factor 1 receptor, TED = thyroid eye disease, TSHR = thyroid stimulating hormone receptor.

CONFIDENTIAL

Viridian is developing an IGF-1R antibody portfolio with the potential to transform the treatment for people living with TED

Veligrotug

Teprotumumab

VRDN-003

Steroids/ Surgery

First

approved

targeted therapy

for TED

8 IV infusions

THRIVE/THRIVE-2 topline data show differentiated clinical profile1

in a new start market

Subcutaneous and potential

best-in-class therapy

Q8W or Q4W dosing;

self-administered

autoinjector planned

REVEAL-1 and REVEAL-2 currently dosing patients; topline data in 1H 2026

Today

Planned 2025 BLA and 2026 EU MAA

Planned 2026 BLA

Source: 1 Viridian THRIVE & THRIVE-2 data on file.

10 BLA = Biologics License Application, IGF-1R = insulin-like growth factor-1 receptor, IV = intravenous, MAA = Marketing Authorization Application, Q4W = every 4 weeks, Q8W = every 8 weeks, TED = thyroid eye disease.

CONFIDENTIAL

Disclaimer

Viridian Therapeutics Inc. published this content on February 27, 2025, and is solely responsible for the information contained therein. Distributed by Public, unedited and unaltered, on February 27, 2025 at 12:21:25.629.