Corporate Presentation

October 2020

A LEADING Gene Therapy BIOTECHNOLOGY COMPANY

GENSIGHT-BIOLOGICS.COM

Disclaimer

This document contains forward-looking statements and estimates made by the GenSight Biologics S.A. (the "Company"), including with respect to the anticipated future performance of the Company, its subsidiaries and affiliates, and the market in which they operate. They include all matters that are not historical facts. These forward-looking statements can be identified by the use of forward-looking terminology including the terms "developments," "estimates," "expects," "intends," "may," "milestones," "potential," "value," "time to market," "targeting," "on track," "planned," "will," "move to," or other variations or comparable terminology, or by discussions of strategy and funding, as well as the Company's, its subsidiaries' and affiliates' technology, and are based on financial and non-financial information, including projections as to the future regulatory situation and other information and assumptions. Such statements, forecasts and estimates are based on various assumptions and assessments of known and unknown risks, uncertainties and other factors, which were deemed reasonable when made but may or may not prove to be correct. Actual events are difficult to predict and may

depend upon factors that are beyond the Company's control. Therefore, actual results, the financial condition, performance or achievements of the Company, its subsidiaries and affiliates or industry results, may turn out to be materially different from any future results, performance or achievements expressed or implied by such statements, forecasts and estimates. Forward-looking statements, forecasts and estimates only speak as of the date of this forward-looking statement, and no representations are made as to the accuracy or fairness of such forward-looking statements, forecasts and estimates. The Company, its subsidiaries and affiliates disclaim any obligation to update any such forward-looking statement, forecast or estimates to reflect any change in the Company's expectations with regard thereto, or any events, or changes in conditions or circumstances on which any such statement, forecast or estimate is based.

2 October 2020 - non confidential

Corporate Overview - Transitioning from R&D to Commercial Organization

GenSight at the forefront of Gene Therapy in Ophthalmology

  • Publicly traded Biotech company
  • Seasoned management team with strong BioPharma and Financial markets experience
  • Differentiated gene therapy approach forming a technology platform leveraging

disruptive gene therapies in ophthalmology and broader

  1. Lead product (LUMEVOQ) targets mitochondrial disease o Second compound (GS030) uses optogenetic technology

LUMEVOQ® - Filed for Approval in Europe in September 2020 and preparing for commercial launch in early 2022

  • Market: High unmet medical need; 1,200 - 1,500 new patients / yr EU + US
  • Efficacy: Unparalleled clinical benefit demonstrated in two Phase III studies
    1. +28/+26 ETDRS letters (i.e. over 5 lines on visual scale) improvement vs nadir(1)
  • Durability & Safety: Excellent tolerability; Visual improvement maintained at least 3 years post-treatment
    1. Clinically meaningful improvement on all Quality of Life parameters at week 96
  • Disease modifying: Stark difference from Natural History

Commercial strategy and manufacturing capabilities close to completion

  • Bilateral injection priced at €700,000 / patient in French named patient Temporary Authorization for Use
  1. Nadir: worst visual acuity from baseline

3 October 2020 - non confidential

Established in 2012 / IPO in 2016

EuroNext Paris:

SIGHT

Market Cap (Oct 9, 2020):

€ 170m

Avg 30-day Daily volume:

1.5% of O/S

Cash (June 30, 2020):

€ 16.8m

Improvement vs nadir in

REVERSE and RESCUE

+5

Lines

Considered clinically meaningful

Seasoned Executive Team

Bernard Gilly

Chief Executive Officer

PIXIUM VISION (Since 2011) FOVEA PHARMA (2005-2009) SOFINNOVA PARTNERS (2000-2005) TRANSGENE (1992-2000)

Ph.D. in biology and bio-economics

Thomas Gidoin

Chief Financial Officer

DBV TECHNOLOGIES (2012-2015) IPSEN (2008-2011)

ERNST & YOUNG (2007-2008)

Magali Taiel

Leigh Shaw

Chief Medical Officer

VP of Regulatory Affairs

ProQR THERAPEUTICS (2016-2018)

UNITED NEUROSCIENCE (2017-2020)

ELI LILLY (2004-2016)

NIGHTSTARX (2015-2017)

PFIZER (2001-2004)

GREGORY FRYER ASSOCIATES (2005-2015)

SERVIER (1999-2001)

HUNTINGDON LIFE SCIENCES (2002-2005)

M.D., Board-certified ophthalmologist

CANTAB PHARMACEUTICALS (1995-2001)

Catherine Cancian

VP of Pharmaceutical Operations

Julio Benedicto

Marie-Claude Holtz

Isabelle Scarabin

VP of Marketing

VP of Quality

Director, Business Development

GENETHON (2015-2017)

SANOFI PASTEUR (1998-2014)

4 October 2020 - non confidential

IMS CONSULTING (2011-2017) BOOZ & COMPANY (2010-2011) MONITOR GROUP (1994-2009)

EXELTIS SANTE (2016-2019)

LYONBIOPOLE (2006-2013)

PFIZER (2015-2016)

GREATER LYON (2002-2006)

ABBVIE (2014-2015)

RESSOURCES EN INNOVATION (1999-2002)

GALDERMA (2012-2013)

SANOFI PASTEUR MSD (1998-1999)

LABORATOIRE LAFON (TEVA) (1993-2012)

Pharm.D.

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Gensight Biologics SA published this content on 12 October 2020 and is solely responsible for the information contained therein. Distributed by Public, unedited and unaltered, on 12 October 2020 15:54:02 UTC