Virus Powered Immunotherapies against Solid Tumors - Corporate Presentation 29 June 2021

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Virus Powered Immunotherapies against Solid Tumors - Corporate Presentation 29 June 2021
Virus Powered Immunotherapies
against Solid Tumors
Corporate Presentation
29 June 2021
Virus Powered Immunotherapies against Solid Tumors - Corporate Presentation 29 June 2021
Disclaimer

This presentation contains forward-looking statements, which are subject to numerous risks and uncertainties, which
could cause actual results to differ materially from those anticipated. There can be no guarantee that (i) the results of
pre-clinical work and prior clinical trials will be predictive of the results of the clinical trials currently under way, (ii)
regulatory authorities will agree with the Company’s further development plans for its therapies, or (iii) the Company will
find development and commercialization partners for its therapies in a timely manner and on satisfactory terms and
conditions, if at all. The occurrence of any of these risks could have a significant negative outcome for the Company’s
activities, perspectives, financial situation, results and development.

For a discussion of risks and uncertainties which could cause the Company's actual results, financial condition,
performance or achievements to differ from those contained in the forward-looking statements, please refer to the Risk
Factors (“Facteurs de Risques”) section of the Universal Registration Document, available on the AMF website
(http://www.amf-france.org) or on Transgene’s website (www.transgene.fr). Forward-looking statements speak only as
of the date on which they are made and Transgene undertakes no obligation to update these forward-looking
statements, even if new information becomes available in the future.

                                                                                                                                 2
Virus Powered Immunotherapies against Solid Tumors - Corporate Presentation 29 June 2021
A World-Leader in Virus Powered Immunotherapies
Click to edit Master title style

Ability to              Customised       Demonstrated       Integrated           Ability         Attractive          Transgene’s
select and              and off-the-     induction          GMP                  to conduct      technologies        technologies
engineer                shelf products   of immune          manufacturing        clinical                            could deliver
                                                                                                 Collaborations
various                                  response,          capacity for         studies until   with NEC,           a game
products,                                including          rapid delivery       POC             Merck/Pfizer,
                        Solid safety                        of pilot scale                                           changing
thanks to our                            tumor-specific                                          AstraZeneca,
experience in           track record     T cell response,   batches                                                  approach
viral vectors,                           associated with                                                             to the
                                                                                                 Mayo Clinic,
protein                                  anti-tumor
                                                                                                 Institut Curie
                                                                                                                     treatment of
engineering,                             activity                                                                    solid tumors
and tumor
antigens

                        Right virus            Right payload                 Right indication          Right patient population

                                                                                                                                     3
Virus Powered Immunotherapies against Solid Tumors - Corporate Presentation 29 June 2021
Our Expertise Translates into Two Unique Technology Platforms
Able
Click toto
         edittarget  multiple
              Master title style solid tumors

                                            THERAPEUTIC VACCINE (MVA)

                                            Patient specific antigens selected to generate the
                                            optimal immune response

Vaccinia                                    Immune T cell activation through multi-mechanisms
vector                • Priming of innate
                        and adaptive                                                                TUMOR CELL   Enlarged
                        immunity                                                                                 immune
                                                                                                     DEATH       response &
                      • Demonstrated
                        safety
                                                                                                                 repertoire
                                            ONCOLYTIC VIRUS (VVcopTK-RR-)

                                            Direct and specific tumor oncolysis

                                            Immune cells activation through multi-mechanisms

                                            Additional activity generated by therapeutic payloads

                                                                                                                              4
Virus Powered Immunotherapies against Solid Tumors - Corporate Presentation 29 June 2021
Multiple Opportunities to Transform Solid Tumor Therapy
  Click to edit Master title
Product                      style
                       Indication                 Target/Transgene       Design              Preclinical   Phase I   Phase II   Next step
  THERAPEUTIC VACCINES
                       Ovarian cancer                                                                                           1st data 4Q 2021
TG4050                                            30 neoantigens
                       Head and neck cancers                                                                                    1st data 4Q 2021

                       Anogenital HPV+                                                                                          Interim analysis
TG4001                 cancers
                                                  HPV 16 E6 – E7
                                                                                                                                around end 2022

  ONCOLYTIC VIRUSES (OV)

                       Gastro-intestinal                                                                                        Last patient enrolled
                       cancers (IV*)              5-FU                                                                          Q4 2021
TG6002                                            chemotherapy                                                                  1st safety/translational
                       Colorectal cancer (IHA*)                                                                                 2H 2021

BT-001                 Solid tumors
                                                  Anti-CTLA4                                                                    1st Phase I data
                                                  + GM-CSF                                                                      1H 2022

                                                                                                                                Best candidates
OVs                    Solid tumors               Undisclosed                                                                   selection to enter into
                                                                                                                                clinical dev.
                                                                                                                                Potential option
5 OVs                                             Undisclosed
                                                                                                                                exercise

                                                                                                                                                           5
                      * IV: intravenous administration, IHA: intrahepatic artery administration
Virus Powered Immunotherapies against Solid Tumors - Corporate Presentation 29 June 2021
Individualized
Neoantigen Vaccine
Taking the Treatment of Each Patient’s Tumor
to a New Level

Cutting-Edge Approach

                   one patient • one genome • one vaccine
Virus Powered Immunotherapies against Solid Tumors - Corporate Presentation 29 June 2021
myvac® | Taking the Treatment of Each Patient’s Tumor to a New Level
by
Clickcapitalizing     onstyle
      to edit Master title multiple cutting-edge technologies

        Demonstrated capability of
        MVA to induce antigen
        specific immune response –
        well-established safety profile                          2 ongoing
                                                                 clinical trials                                           TG4050:
  Patient specific neoantigens                                                                                             1st candidate based on
  are highly immunogenic –                                                                                                 the myvac® platform
  different from self and specific
  to each patient                                                      Transgene has
                                               Click here
                                                                       in-house expertise (VacDesignR™)
                                                                       to optimize insertion of                            NEC covers 50%
      Improved genetic engineering                                     neoantigens
      design for the myvac® MVA                                        in the myvac® MVA backbone
                                                                                                                           of the development
      vector                                                                                                               cost of TG4050
                                     NEC’s AI uses multiple
                                     biological and physico-
                                     chemical parameters to
                                     identify most immunogenic
                                     neoantigens*

                                                                                                 *Source: Mallone et al., “Performance of
                                                                                                 neoantigen prediction for the design of TG4050, a
                                                                                                 patient specific neoantigen cancer vaccine”, AACR,   7
                                                                                                 June 2020, Poster presentation
Virus Powered Immunotherapies against Solid Tumors - Corporate Presentation 29 June 2021
Producing TG4050, First Clinical Batches of the Individualized Immunotherapy Already Released
Click to edit Master title style

                         GMP facility   Manufacturing process   Current lead-time
                         in place       in place and being      from tumor biopsy to tailored
                                        progressively           vaccine shipment in line with
                                        automated               objectives

                                                                                                8
Virus Powered Immunotherapies against Solid Tumors - Corporate Presentation 29 June 2021
TG4050 | First Individualized Vaccine Based on the myvac® Technology
2Click
   ongoing      clinical
       to edit Master        trials
                      title style

                                                                                    Moderately mutated
                        myvac®                                                      tumors
                        MVA                                                         Ovarian and Head
                             Established safety                                     & Neck cancers
                             and
                                                                                         Limited efficacy of
                             immunogenicity
                                                                                         checkpoint blockers
DESIGNED                                                              TG4050             (low/medium TMB*)
TO TREAT
PATIENTS                                                 INDIVIDUALIZED CANCER
WITH                                                            VACCINE
ESTABLISHED
                        Selected                                                    Patients in clinical remission
DISEASE                 patients                                                    with undetectable residual
                        neoantigens                                                 disease
                                            Highly immunogenic                          Allows the use of TG4050
                                            Optimized gene editing technologies         as monotherapy

                                                                                                                     9
                                                                                  *TMB: tumor mutation burden
Virus Powered Immunotherapies against Solid Tumors - Corporate Presentation 29 June 2021
TG4050 | Ovarian Cancer Trial after Surgery and Adjuvant Chemotherapy
Phase     I trial
Click to edit     in title
              Master  13style
                           patients (NCT03839524)

First patient         Surgery                                        Asymptomatic relapse
enrolled in
January 2020                 Adjuvant                    Clinical remission        TG4050 (single agent) treatment
                             Platinum chemotherapy       | TG4050 production

                                             Complete response

   ANALYSES INCLUDE                                                                             LEAD INVESTIGATOR: Matthew S. Block,
                                                                                                MD, PhD, Mayo Clinic (Rochester)
          characterization of T-cell immune response
          change in tumor micro-environment
          clinical outcome

First clinical data in 4Q 2021

                                                                                                                                       10
TG4050 | HPV-Negative Head and Neck Cancer Trial after Surgery and Adjuvant Therapy
Randomized
Click to edit MasterPhase      I trial in 30 patients (NCT04183166)
                     title style

                                                                   Arm
First patient          Surgery                          Complete
                                                                    A                   Recurrence
                                                        response         TG4050
enrolled in                                                              single agent
                              Adjuvant Chemo/radio therapy                                     TG4050 + SOC
January 2020                  | TG4050 production                                              (incl. checkpoint blockers)
                                                                         Patient
                                                                         monitoring
                                                                   Arm                  Recurrence
                                                                    B

    ANALYSES INCLUDE                                                                       LEAD INVESTIGATOR: Pr. Christian Ottensmeier,
                                                                                           Clatterbridge cancer care center, Liverpool
           characterization of T-cell immune response
           change in tumor micro-environment
           clinical outcome

First clinical data in 4Q 2021

                                                                                                                                           11
TG4050 | Next Milestones
 Ongoing
 Click to edit trials  – Could
               Master title style treat patients with an established disease

Our strategy is to:                                        Clinical program backed by extensive genomic          First clinical
                                                           and immunologic translational research                data from
Demonstrate vaccine activity at biological and clinical    project in collaboration with academic and private    ongoing trials
stages in patients with minimal disease (allowing the      top-level players (Institut Curie, HalioDx,           expected
use of vaccine in monotherapy)                             BostonGene, Mayo Clinic, University of Liverpool).
                                                           The programs aims at:
                                                                                                                 4Q 2021

Characterize vaccine biology and mechanism                                                                       Will serve as
comprehensively and validate our design                       Accelerating future clinical development
                                                                                                                 basis for
                                                              Potentially identifying particular subpopulation   partnering
Based on vaccine biology, determine the most relevant         with a differentiated response
                                                                                                                 discussions
clinical positioning including potential combination and
target populations

                              TG4050 monotherapy has potential to expand to other solid tumors
                              in patients with minimal residual disease
                                                                                                                                  12
TG4001

 Potential to Transform the Treatment
 of Anogenital HPV Positive Solid Tumors

Interim analysis expected around the end of 2022
TG4001 | Virus Powered Candidate Vaccine
Click to edit Master title style

                                                                   The right indication
                           The right virus
                                                                   anogenital
                                     MVA
                                                                   HPV16-positive
                                                                   cancers
                                                 Click here

                                             OPTIMIZED TREATMENT
                                               FOR HPV-POSITIVE
                                                   TUMORS           The right
            The right HPV antigens                                  patient population
                         E6 and E7                                  Patients without liver
                                                                    metastasis

                                                                                             14
TG4001 | Phase Ib/II Data of TG4001 with Avelumab Presented at SITC 2020
 Promising      results,
 Click to edit Master         particularly in patients without liver metastasis (NCT03260023)
                      title style
                                                                                                                                   Collaboration
34 heavily pretreated patients                                                                                                     with
with metastatic HPV16+ cancer
(oropharyngeal, anogenital)

                                        Identified target population:                                                              Compares
                                                     patients without                                                              favorably to
                                                  liver metastasis (n=23)                                                          ICIs in
                                                                                                                                   monotherapy
                              34.8%
                                                vs patients with liver metastasis (n=11)
                                                                                                  5.6                              and
                               vs 0%
                                                                                               MONTHS                              competitive
                                                                                                vs 1.4 month                       landscape

                                                                                                                                   Source: Le Tourneau et al.
                                                                                                                                   “TG4001 (Tipapkinogene
                                                                                                                                   sovacivec) and avelumab for

                                       1   COMPLETE
                                           RESPONSE
                                       Patient with anal cancer and peritoneal             7   PARTIAL
                                                                                               RESPONSES
                                                                                                                                   recurrent/metastatic (R/M)
                                                                                                                                   Human Papilloma Virus (HPV)-
                                                                                                                                   16+ cancers: clinical efficacy and
                                                                                                                                   immunogenicity.” 2020 SITC
                                                                                                                                   Annual Meeting, 9-11
                                       extension that all disappeared – still                                                      November 2020, Poster
                                       followed in the trial                                                                       presentation
                                                                                                                                                                        15
                                                         ORR: objective response rate (RECIST 1.1); mPFS: median progression-free survival
Expanded Trial Focuses on Patient Population that Derived Improved Clinical Benefit in Phase Ib/II
Click to edit Master title style

                                   Patients with HPV16-positive anogenital cancer
                                   including cervical, vulvar, vaginal, penile and anal cancers

                                      With recurrent/metastatic disease

                                      Treated in first line or in second line (with a maximum of one prior systemic
                                      chemotherapy versus two allowed in Phase Ib/II trial)

                                      Without previous exposure to cancer immunotherapy

                                      Without liver metastasis at baseline

                                      Including all levels of PD-L1 expression

                                                                                                                      16
TG4001 | Randomized Controlled Phase II Trial Supported by Clinicians
Trial to enroll up to ~ 140 patients (NCT03260023)
                                                                Randomized
                                                                   (1:1)     Arm A
Patients with                                                                        TG4001 + avelumab
                                 Patients with
HPV16+ Anogenital Cancer         recurrent/metastatic disease
                                                                                     Avelumab single agent
                                                                             Arm B

 PRIMARY ENDPOINTS               SECONDARY ENDPOINTS                                 Interim analysis data expected
                                       Overall Response Rate                         around the end of 2022
     Progression-Free Survival
     (RECIST 1.1)                      Disease Control Rate                          (~50 patients enrolled)
                                       Overall Survival
                                       Other immunological parameters
                                                                                           Collaboration
                                                                                           with

                                                                                                                      17
A Methodologically Sound Phase II Trial to Further Validate the Potential of TG4001
Click to edit Master title style

               First patient enrolled
               in June 2021
                                                                          Interim analysis data
                                                                          expected around the
               Trial received regulatory clearance                        end of 2022
               in the US, France and Spain

                                                                         Positive interim analysis data to be
                                                                         leveraged:
                                                                         to discuss best way forward to
                                                                         registration with health authorities
                                                                         for partnering opportunities

                             TG4001 has potential to address all HPV positive cancers
                                                                                                                18
Our Unique Invir.IO™
Platform
Rapidly Generating Multiple Virus-Powered
Off-the-Shelf Drug Candidates
Invir.IO™ Patented Virus Backbone Based on Vaccinia Virus Copenhagen Strain
    KeytotoeditTransformative
    Click        Master title style   therapies

             Tumor-specific replication       Safe in a                     Targeted and       Broad spectrum infectivity
Accentuated with TK-RR- double deletion       large variety                 Continuous         Can infect all types of tumor cells
   Cytoplasm-restricted viral replication     of routes,                    Delivery Potent    Large and stable genome
     No risk of integration into host DNA     including IV                  Payloads           High payload potential
Good tolerance in IV demonstrated from
                   ongoing TG6002 trials
              Low-grade adverse events
                                                                                                         Proof of Concept
                                                                                                         of the functionality of the
                                                                                                         intravenous administration
                                                                                                         in human

       Short time to clinic from product      In-house                                        Multiple mode of action
         design to clinic (i.e. 18-24 mo)     GMP                          Tumor              · Oncolysis
                                              manufacturing                Eradication        · Immune mechanisms
                                                                           including mets     · Therapeutic payloads
                                                                                              Abscopal activity demonstrated
                                                                                              in preclinical models for BT-001

                                                   Ongoing collaboration                                                               20
TG6002 | Chemotherapy Produced Directly in the Tumor
Interim
Click to editPhase   I data
              Master title style (IV*) presented at AACR 2021

                     The right virus                                                                 PoC clinical data for IV
                     + payload                                                                       administration
                                                                                             2 ongoing Phase I/II trials evaluating IV* and
          Oncolytic armed with FCU1 gene,                                                    IHA** administration
          prodrug activator                                                                  After IV infusion, TG6002 was detected in the
          Converts 5-FC into 5-FU, a potent                                                  tumor and induced the production of 5-FU –
          chemotherapy agent                                                                 no major SAE (Phase I interim results)
                                                                                             First IV trial clinical data presented
                                                                                             at AACR 2021 (April 2021)

            The right indication                                                                  The right
            5-FU sensitive cancers                                                                patient population

                                                                                         Colorectal cancer with liver metastases
                                                                                         Current SoC in 2L: bevacizumab + folfiri/folfox
                                                                                         (3L: regorafenib, TAS-102)
                                                                                         OS: ~13 months
                                                                                         2L: 180,000 pts/year
                                                                                         – EU 28 & US                                      21
            * IV: intravenous administration **IHA: intrahepatic artery administration
TG6002 | Interim Phase I Data Presented at AACR 2021
       Clinical   PoC
       Click to edit    of title
                     Master      feasibility of IV route for our patented VVcop TK-RR- virus
                            thestyle

      TG6002 replicates in tumor                                                                              5-FU is expressed in tumor                               Long-lasting expression
      tissue without sign of                                                                                  tissue in most of the                                    of 5-FU
      widespread replication                                                                                  evaluable patients (3 cohorts)

                                                                                                                                                                        5-FU (•) and 5-FC (•) quantification
            Fraction of tumor tissue positive for                                                                        Correlation between plasma                      in plasma (1·109 pfu dose cohort)
             TG6002 by qPCR or plaque assay*                                                                               and tumor 5-FU at day 5
                                                                                                             10000
                                                                                                                                                                         TG6002 infusion           5-FC administration
                         60
                                                          1/2

                                                                                       Plasma 5-FU (ng/ml)
                                                                                                              1000
                                            3/8
       positive tumors

                               1/3
         % of TG6002

                         40
                                                                                                               100
                                                                                                                                     Patient with direct
                         20
                                                                                                                10                   evidence of TG6002 in
                                                                                                                                     tumor are red dots ( )
                          0                                                                                      1
                              3108 pfu     1109 pfu    3109 pfu                                                   1      10      100     1000    10000
                                          Dose cohorts
                                                                                                                             Tumor 5-FU (pg/mg)
* Sensitivity of qPCR of plaque assay is impacted by scarcity of viable cells in                                                                                                            Days
tumor biopsies

                                                                                   Source: Bendjama et al. “Oncolytic virus TG6002 locates to tumors after intravenous infusion and
                                                                                   induces tumor-specific expression of a functional pro-drug activating enzyme in patients with advanced                                22
                                                                                   gastrointestinal carcinomas” 2021 AACR Annual Meeting, April 9-14, 2021, Poster presentation
BT-001 | Oncolytic Virus Encoding for an Anti-CTLA4 Antibody (Ab)
Click to edit Master title style

         Transgene’s patented                                                     BioInvent’s potent
         Invir.IO™ backbone                                                       anti-CTLA4 Ab
         · Oncolysis                     BT-001
                                         is designed to achieve:                 · Activates and increases T-effector cells
         · Anti-tumor immune induction
                                                                                 · Treg depleting activity
         · Safe delivery of payload
                                         Strong and sustained anti-tumor                                                      Selected
                                         activity                                                                             publications:
                                                                                                                              Kleinpeter et al., 2016
                                         Better safety vs anti-CTLA4 IV
                                         Immune change in tumor                                                                Vargas F. et al., 2018

                                         microenvironment
             Can be developed for
             multiple cancer                                                       GM-CSF                                     Marchand et al., 2018
                                                                                   cytokine
             indications
                                                                           Stimulates immune cells (incl. APC)                Semmrich et al., 2020

                                                      collaboration                                                                               23
                                           50/50      with BioInvent
BT-001 | Phase I/II Trial Starting in Europe
    Leverage      the IT*
    Click to edit Master title route
                               style to accelerate development with anti-PD1 (NCT04725331)

                                                                                                                            Patients with
                                                                                                                            metastatic or
                                                Repeated and                                                                advanced
                                                ascending doses                                                             injectable solid
Trial authorized                                of BT-001 IT*                                                               tumors such as:
in Europe and in the US                                                                                                     soft tissue sarcoma,
First patient enrolled in Feb. 2021                                                                                         Merkel cell
                                                                                                                            carcinoma,
                                                                                                                            melanoma, triple
                                                                                                                            neg breast cancer,
                                                                                                                            non-small cell lung
                                                                                                                            cancer
First Phase I data
to be presented in 1H 2022
(safety and translational data)               Repeated doses                                                   Repeated doses
                                              of BT-001 IT +                                                     of BT-001 IT +
                                              pembrolizumab IV**                                            pembrolizumab IV**

                                                                                                                                                   24
                                                                   *IT: intratumoral administration **IV: intravenous administration
Invir.IO™ Pipeline Will Allow us to Generate Significant Value
Next
Click tocandidates
         edit Master titleare
                          stylealready in preclinical development

               Patented                  Potential to                                    Optimize
               backbone                  generate multiple                               Invir.IO™ value
                                                                    Highly productive    creation
               demonstrated:             novel
                                                                    platform             via a combination
                                         immunotherapies            Several candidates   of early out-
                                         with multiple modes        in preclinical
               Ability to safely be                                                      licensing and
                                         of action against          development
               administered IV                                                           in-house clinical
                                         established or novel
                                                                                         development
               Express its payload       targets
                                                                                         until POC
               in the tumor,
               including with IV
               administration

                                                                                                             25
Outlook

          26
Company Funded to Deliver Multiple Value Generating Milestones

 €19.1 million in cash and cash equivalents
 at March 31, 2021                                         Ownership
                                                           As of June 24, 2021

 €34.1 million raised in June 2021
 through a private placement

 In addition, Transgene holds:                                        62%
 Tasly BioPharmaceuticals shares valued at €32.3 million                             Free float
                                                                                     38%
 at the end of December 2020
                                                            •   Listed on Euronext Paris
 FINANCIAL VISIBILITY until 4Q 2023                         •   ISIN: FR0005175080 - Ticker: TNG

                                                                                                   27
Our Vision and Environmental, Social and Governance Policy
 Maintain      Company’s
 Click to edit Master title style Sustainability by Creating Value, Strengthening Social Contribution and
 Minimizing Environmental Impact

                 Transgene’s ESG strategy is                                                                          16 interns
                 based on six commitments
                                                                   1,883 h                          85%
                                                                                                      permanent
                                                                                                                      4 PhD students
                                                                        dedicated to                 work contract   11 apprentices
     to patients                                                    occupational training

     to our partners
     to our employees
     to our shareholders and investors                                                       100%
     to society and territories                                   91/100                       of employee
                                                                                            evaluations include
                                                                                               ESG criterion
                                                                    Professional
     to the planet                                                 Equality Index

Gaïa EthiFinance: 63/100 (+9 pts)        Our ESG policy is detailed in the Universal Registration      URD
Vigeo Eiris: 44/100 (+20 pts)            Document 2020, chapter 4.                                     2020                            28
➔ Above industry benchmark
2021-2022 Milestones
AClick to editLeader
   World       Master title style
                      in Virus-Powered Immunotherapies against Solid Tumors

                                            TG4001

   MVA personalised neo-antigen             HPV-positive cancers therapeutic     VVcopTK-RR- multi-armed oncolytic
   therapeutic cancer vaccines              vaccine                              viruses

   TG4050                                   TG4001                               TG6002 Phase I data (IHA) | 2H 2021
   First data from two on-going clinical    Interim analysis data | around the
   trials - ovarian and head and neck       end of 2022                          BT-001 Initial Phase I data | 1H 2022
   cancer | 4Q 2021                                                              AstraZeneca Potential option exercise

                        TARGET: sign licensing agreements based on upcoming trial results

                                                                                                                         29
Investment Highlights
Click to edit Master title style

                                                        Unique virus
           A world leader          Clinical-stage       powered                  World-class
           in virus powered        immunotherapy        technologies             scientific and clinical
           immunotherapies         company              to specifically target   collaborations
                                                        cancer cells

                                   myvac® and
           Biological and          Invir.IO™: best-     Multiple key             Potentially
           clinical evidence       in-class platforms   milestones
           of anti-tumor           potential to         expected in 2021
                                                                                 game
           efficacy                generate multiple    and 2022                 changer
                                   candidates
                                                                                 of the
                                                                                 treatment
                                                                                 of solid tumors
                                                                                                           30
Thank you
for your attention

                     31
Appendices

             32
TG4050 Process for Individualized Neoantigen Vaccination
     Combines       bioengineering
     Click to edit Master title style and digital transformation

    ROUTINE                                                                         DATA PROCESSING,                            GENE EDITING,
  TUMOR BIOPSY                             GENE SEQUENCING                        ARTIFICIAL INTELLIGENCE                      MANUFACTURING

         Patient                                Next                                 Selection of                                Vaccine
     Treatment                               generation                             30 neoantigens                            generation and
   administration                            sequencing                                                                       manufacturing

                                   Database                   Epitope Scoring                     NEC’S NEOANTIGEN PREDICTION
          Sequencing
          data                                                  HLA Binding
                                                                                                        Epitope Ranking
                    WXS       Proprietary Database
Normal

                                                             Tumor presentation

                    RNA
                                                              Immunogenicity
                             Candidate Generation
                                                                                                         Overall Ranking          Vaccine
                                 HLA Typing                    Self-Similarity
                                                                                                                by                 recipe
                    WXS                                                                                    Graph-based
Tumor

                                                              RNA Expression
                                                                                                        relational learning
                                Variant Calling
                    RNA

                                                                                                                                                33
TG4001 | Treatment Induced Long-Lasting Responses and Changes
in
Clickthe   Tumor
      to edit Master titleMicro-Environment
                          style

   Evolution of tumor size
   in patients without liver metastases   TG4001 elicits strong, long-lasting and specific T-cell
                                          response against HPV16 E6 and E7

                                          Treatment shifts « cold » tumor into « hot » tumor

                                          Increased CD3+ and CD8+ infiltrate
                                          Higher PD-L1 expression
                                          Expression of several genes
                                          associated with activation
                                          of the immune system                     Source: Le Tourneau et al.
                                                                                   “TG4001 (Tipapkinogene
                                                                                   sovacivec) and avelumab for
                                                                                   recurrent/metastatic (R/M)
                                                                                   Human Papilloma Virus (HPV)-
                                                                                   16+ cancers: clinical efficacy and
                                                                                   immunogenicity.” 2020 SITC
                                                                                   Annual Meeting, 9-11
                                                                                   November 2020, Poster
                                                                                   presentation

                                                                                                                        34
Significant Opportunity for TG4001 in Anogenital HPV16-Positive Cancers
           HPV16      etiology
           Click to edit            creates
                         Master title style a significant market opportunity

         Incidence of anogenital HPV16 positive cancers
                      w/o liver metastases
                                   Newly diagnosed patients with metastatic disease
                                         and patients with recurrent disease

                                                                                                                                                                                              Clinical outcome
                                                                                Vulval                                                          Cervix
                                                                                 8%                                                              50%                                          needs to be improved
                  ~ 25,000
                  new patients
                  per year                                                Vaginal                                                                                                           Current treatments, mostly radio/chemotherapy,
                                                                           15%                                                                                                              do not address the etiology (viral origin) of the disease

                                                                                  Penile                                                                                                    No IO drugs (ICIs) approved yet in 1L of treatment
                                                                                   2%
                                                                                                                                Anal                                                        Pembrolizumab approved in 2L cervix cancer (USA)
                                                                                                                                25%

                             65%                                               35%
                           EU27 + UK                                           USA

Estimated cancer cases (2025) based on: 1. ICO/IARC – HPV Information Center> Prevention at a glance // 2. HPV-positive cervical cancer: Globocan/IARC 2020 Cancer Fact Sheets: cervix uteri (C53); ICO/IARC – HPV Information Center Statistics // 3. HPV-
positive vaginal cancer: Globocan/IARC 2020 Cancer Fact Sheets: vagina (C52); ICO/IARC – HPV Information Center Statistics // 4. HPV-positive vulvar cancer: Globocan/IARC 2020 Cancer Fact Sheets: vulva (C51); ICO/IARC – HPV Information Center Statistics; CDC
United States Cancer Statistics: Data Visualizations; SEER Cancer stat facts: vulvar cancer // 5. HPV-positive anal cancer: Globocan/IARC 2020 Cancer Fact Sheets: anus (C21); ICO/IARC – HPV Information Center Statistics; CDC>Cancer Home>HPV and
Cancer>Statistics>Rates by Race and Ethnicity>HPV-Associated Anal Cancer Rates by Race and Ethnicity; American Cancer Society: Anal Cancer // 6. HPV-positive penile cancer: Globocan/IARC 2020 Cancer Fact Sheets: penis (C60); ICO/IARC – HPV Information
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Center Statistics; CDC>Cancer Home>HPV and Cancer>Statistics>Rates by Race and Ethnicity>HPV-Associated Cancers Rates by Race and Ethnicity
Multiple Payloads | Deliver Significant Patient Benefits
Local
 Click to payload
          edit Master delivery
                      title style helps better neutralize the tumor in an effective and safe manner by
limiting systemic exposure
                               Targeted insertion of recombinant payload
                               at selected loci in the Vaccinia genome
                                                                                                              Several
IMMUNE MODULATORS                                                          PRODRUG                            payloads can be
                                                                           ACTIVATORS                         encoded in one
     ICIs (e.g. PD-1/PD-L1,                                                                                   multi-armed OV
     CTLA4, TIM-3, …)                                                              e.g. Fcu1 (TG6002), an     (several loci, up to 20-
     Monoclonal antibodies                                                         enzyme that locally        25 kb capacity)
     or fragments                                                                  converts 5-FC into 5-FU,
     (scFV, Fab, …)                                                                a chemotherapeutic
                                                                                   agent
     Enzymes controlling                                                                                      Multiple
     immunosuppressive                                                                                        payload
     metabolites (e.g. ADA)                                                                                   sourcing
                                     IMMUNE BOOSTERS
                                                                                                              approaches
                                              Cytokine (e.g. GM-CSF, interleukins, … )
                                              Agonistic ligands (e.g. CD40L, Flt3L, …)
                                              Growth Factors (e.g. VEGF)
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Ongoing Collaboration with AstraZeneca (AZ)
Invir.IO™     platform
Click to edit Master         validation
                     title style

                  AstraZeneca             5 novel
                  secured an              therapeutic         Of 5 novel oncolytic
                                          payloads to be      immunotherapies,       Possible option
                  access to
                                          integrated in our   2 have been            exercise by AZ
                  Transgene’s
                                          VVCOPTK-RR-                                on each candidate
                  Invir.IO™                                   delivered to AZ
                                          proprietary
                  platform                backbone

                  Looking to augment                                                 To continue
                  in-house expertise                                                 development
                  in OVs                                                             in the clinic
                                                                                     Transgene
                                                                                     in charge of GMP
                                                                                     manufacturing
                         Could generate additional revenues for Transgene            of clinical batches
                         and further validate Invir.IO™ in the clinic

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TG6002 | Two Phase I/IIa trials in 5-FU sensitive GI indications
Two
Click tonovel  administration
         edit Master title style routes - IV and IHA

    Gastro-intestinal adenocarcinoma with liver                              Colorectal cancer patients with unresectable
   metastasis (colon cancer) - TG6002 IV + oral 5-FC                      liver metastases (CRLM) – TG6002 IHA + oral 5-FC

                                                   Interim data
        Phase I (dose escalation)                  demonstrate 5-FU                         Phase I (dose escalation)
           up to 40 patients                       production in the                           up to 30 patients
                                                   tumor - no major SAE
                                                   PoC data
                                                   presented
        Phase IIa part (efficacy)                  at AACR 2021                              Phase IIa part (efficacy)
             35 patients                                                                          38 patients

      PRINCIPAL INVESTIGATOR: Prof Philippe Cassier,                         PRINCIPAL INVESTIGATOR: Dr. Adel Samson,
      centre Léon Bérard (Lyon, France)                                      St. James’ University Hospital (Leeds, UK)

      INDs granted in Belgium, Spain, France                                 IND granted in the UK, France

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BT-001 | Exciting Preclinical Data
Click to edit Master title style

                                     Strong abscopal effect
                                     (impact on distant lesions)

                                          i.t. injection

                                   CT26

                                                                        Semmrich et al., BT-001, an
                                                                        oncolytic vaccinia virus armed
                                                                        with a Treg-depleting human
                                                                        recombinant anti-CTLA4
                                                                        antibody and GM-CSF to target
                                                                        the tumor microenvironment,
                                                                        SITC, Nov. 2020

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C O N TA C T

                                     Lucie Larguier
                        Director Investor Relations
                    and Corporate Communication

                                       +33 6 7624 7227
                                 larguier@transgene.fr

400 Boulevard Gonthier d’Andernach | Parc d’Innovation | CS80166
                      67405 Illkirch Graffenstaden Cedex | France
                   Tél.: + 33 (0)3 88 27 91 21 | www.transgene.fr
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