SEC Filing | Adicet Bio

Date: June 23, 2020

resTORbio, Inc.

/s/ Chen Schor

Chen Schor

President and Chief Executive Officer

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8-K

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d)

of the Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): June 23, 2020

resTORbio, Inc.

(Exact name of Registrant as Specified in Its Charter)

Delaware

001-38359

81-3305277

(State or Other Jurisdiction

of Incorporation)

(Commission

File Number)

(IRS Employer

Identification No.)

500 Boylston Street, 13th Floor

Boston, MA

02116

(Address of principal executive offices)

(Zip Code)

Registrant’s telephone number, including area code: (857) 315-5528

Not Applicable

(Former Name or Former Address, if Changed Since Last Report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☒	Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐	Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐	Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐	Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of each class

Trading

Symbol(s)

Name of each exchange

on which registered

Common Stock, par value $0.0001 per share

TORC

The Nasdaq Global Select Market

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§ 230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§ 240.12b-2 of this chapter).

Emerging growth company ☒

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 8.01

Other Events

As previously announced, resTORbio, Inc. (“resTORbio”) and Adicet Bio, Inc. (“Adicet”) entered into an Agreement and Plan of Merger (the “Merger Agreement”), dated as of April 28, 2020, by and between resTORbio, Adicet and Project Oasis Merger Sub, Inc., a direct, wholly-owned subsidiary of resTORbio (“Merger Sub”), pursuant to which, and subject to the satisfaction or waiver of the conditions set forth in the Merger Agreement, Adicet will be merged with and into Merger Sub (the “Merger”), with Adicet continuing after the Merger as the surviving company and a wholly-owned subsidiary of resTORbio.

resTORbio has updated its joint investor presentation which provides supplemental information regarding the Merger that resTORbio intends to make available to investors and post on the investor relations portion of its website, which is located at www.resTORbio.com. The presentation is filed as Exhibit 99.1 to this Current Report on Form 8-K, and supersedes in its entirety the joint investor presentation furnished as Exhibit 99.1 to resTORbio’s Form 8-K filed with the U.S. Securities and Exchange Commission (the “SEC”) on June 2, 2020.

Cautionary Statement Regarding Forward-Looking Statements

This Current Report on Form 8-K and the accompanying exhibit contains “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995, including, but not limited to, statements regarding: the expected structure, timing and completion of the merger, future product development plans and projected timelines for the initiation and completion of preclinical and clinical trials; the potential for the results of ongoing preclinical or clinical trials and the efficacy of either party’s drug candidates; the potential market opportunities and value of drug candidates; future product development and regulatory strategies, including with respect to specific indications; the combined company’s future financial performance, results of operations or sufficiency of capital resources to fund operating requirements; future Nasdaq listing; expectations regarding the combined company’s focus, operations, resources and development plan; expectations regarding synergies resulting from the Merger; the executive and board structure of the combined company; expectations of the potential impact of the COVID-19 pandemic on resTORbio’s, Adicet’s and the combined company’s strategy and future operations, including ability to access capital or obtain additional financing and ability to conduct, and the timing of, clinical trials; and the potential payment of proceeds pursuant to the CVR Agreement by and between resTORbio, the Holders’ Representative (as defined therein) and the Rights Agent (as defined therein) (as defined in the Merger Agreement). The use of words such as, but not limited to, “believe,” “expect,” “estimate,” “project,” “intend,” “future,” “potential,” “continue,” “may,” “might,” “plan,” “will,” “should,” “seek,” “anticipate,” or “could” and other similar words or expressions are intended to identify forward-looking statements. Forward-looking statements are neither historical facts nor assurances of future performance. Instead, they are based on resTORbio’s current beliefs, expectations and assumptions regarding the future of resTORbio’s and Adicet’s business, future plans and strategies, clinical results and other future conditions. New risks and uncertainties may emerge from time to time, and it is not possible to predict all risks and uncertainties. No representations or warranties (expressed or implied) are made about the accuracy of any such forward-looking statements. There can be no assurance that the parties will be able to complete the Merger on the anticipated terms, or at all.

Such forward-looking statements are subject to a number of material risks and uncertainties including but not limited to: (i) risks associated with resTORbio’s ability to obtain the stockholder approval required to consummate the Merger and the timing of the closing of the Merger, including the risks that a condition to closing would not be satisfied within the expected timeframe or at all or that the closing of the Merger will not occur; (ii) the outcome of any legal proceedings that may be instituted against the parties and others related to the merger agreement; (iii) unanticipated difficulties or expenditures relating to the Merger, the response of business partners and competitors to the announcement of the Merger, and/or potential difficulties in employee retention as a result of the announcement and pendency of the Merger; (iv) the length of time necessary to consummate the Merger may be longer than anticipated; (v) resTORbio’s continued listing on the Nasdaq Global Market until closing of the Merger; (vi) the combined company’s listing on the Nasdaq Global Market after closing of the Merger; (vii) the adequacy of the combined company’s capital to support its future operations and its ability to successfully initiate and complete clinical trials; (viii) the nature, strategy and focus of the combined company; (ix) the difficulty in predicting the time and cost of development of resTORbio’s and Adicet’s product candidates; (x) the executive management and board structure of the combined company; (xi) the risk that any potential payment of proceeds pursuant to the CVR Agreement may not be distributed at all or result in any value to resTORbio’s stockholders; (xii) Adicet’s plans to develop and commercialize its product candidates, including ADI-001; (xiii) the timing of initiation of Adicet’s planned clinical trials; (xiv) the timing of the availability of data from Adicet’s clinical trials; (xv) the timing of any planned investigational new drug application or new drug application; (xvi) Adicet’s plans to research, develop and commercialize its current and future product candidates; (xvii) Adicet’s ability to enter into new collaborations, and to fulfill its obligations under any such collaboration agreements; (xviii) the clinical utility, potential benefits and market acceptance of Adicet’s product candidates; (xix) Adicet’s commercialization, marketing and manufacturing capabilities and strategy; (xx) Adicet’s ability to identify additional products or product candidates with significant commercial potential; (xxi) developments and projections relating to Adicet’s competitors and its industry; (xxii) the impact of government laws and regulations; (xxiii) Adicet’s ability to protect its intellectual property position; (xxiv) Adicet’s estimates regarding future revenue, expenses, capital requirements and need for additional financing following the Merger; and (xxv) those risks detailed in resTORbio’s preliminary proxy statement/prospectus/information statement filed with the SEC on June 23, 2020 (and, when available, resTORbio’s definitive proxy statement/prospectus/information statement), as well as discussions of potential risks, uncertainties, and other important factors in resTORbio’s subsequent filings with the SEC. Any forward-looking statement speaks only as of the date on which it was made. None of resTORbio, Adicet, nor their affiliates, advisors or representatives, undertake any obligation to publicly update or revise any forward-looking statement, whether as result of new information, future events or otherwise, except as required by law.

Important Additional Information About the Merger and Where to Find It

This communication relates to the proposed merger transaction involving resTORbio, Inc. (“resTORbio”) and Adicet Bio, Inc. (“Adicet”) and may be deemed to be solicitation material in respect of the proposed merger transaction. In connection with the proposed merger transaction, resTORbio has filed with the U.S. Securities and Exchange Commission (the “SEC”) a registration statement on Form S-4 (the “Form S-4”) that contains a preliminary proxy statement/prospectus/information statement. The Form S-4 has not yet become effective. After the Form S-4 is declared effective, a definitive proxy statement/prospectus/information statement will be mailed to the stockholders of resTORbio and Adicet. This communication is not a substitute for the Form S-4, the definitive proxy statement/prospectus/information statement or for any other document that resTORbio may file with the SEC and or send to resTORbio’s stockholders in connection with the proposed merger transaction. BEFORE MAKING ANY VOTING DECISION, INVESTORS AND SECURITY HOLDERS OF RESTORBIO ARE URGED TO READ THE FORM S-4, THE DEFINITIVE PROXY STATEMENT/ PROSPECTUS/INFORMATION STATEMENT AND OTHER DOCUMENTS FILED WITH THE SEC CAREFULLY AND IN THEIR ENTIRETY WHEN THEY BECOME AVAILABLE BECAUSE THEY WILL CONTAIN IMPORTANT INFORMATION ABOUT RESTORBIO, THE PROPOSED MERGER TRANSACTION AND RELATED MATTERS. Investors and security holders will be able to obtain free copies of the Form S-4, the definitive proxy statement/prospectus/information statement and other documents filed by resTORbio with the SEC through the website maintained by the SEC at http://www.sec.gov. Copies of the documents filed by resTORbio with the SEC will also be available free of charge on resTORbio’s website at www.restorbio.com, or by contacting resTORbio’s Investor Relations at 212-362-1200.

Participants in the Solicitation

resTORbio, Adicet and their respective directors and certain of their executive officers may be considered participants in the solicitation of proxies from resTORbio’s stockholders with respect to the proposed merger transaction under the rules of the SEC. Information about the directors and executive officers of resTORbio is set forth in the preliminary proxy statement/prospectus/information statement, which was filed with the SEC on June 23, 2020, and in subsequent documents filed with the SEC. Additional information regarding the persons who may be deemed participants in the proxy solicitations and a description of their direct and indirect interests, by security holdings or otherwise, will also be included in the Form S-4, the definitive proxy statement/prospectus/information statement and other relevant materials to be filed with the SEC when they become available. You may obtain free copies of this document as described above.

No Offer or Solicitation

This Current Report on Form 8-K does not constitute an offer to sell or the solicitation of an offer to buy any securities nor a solicitation of any vote or approval with respect to the Merger or otherwise. No offering of securities shall be made except by means of a prospectus meeting the requirements of Section 10 of the U.S. Securities Act of 1933, as amended, and otherwise in accordance with applicable law.

Item 9.01

Financial Statements and Exhibits

(d) Exhibits


Exhibit Number		Description

99.1		Joint Corporate Presentation of resTORbio, Inc. and Adicet Bio, Inc., dated June 23, 2020.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

EX-99.1

resTORbio and Adicet Bio June 23, 2020 Exhibit 99.1

Forward-Looking Statements This communication contains “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995, including, but not limited to, statements regarding: the expected structure, timing and completion of the proposed merger transaction, future product development plans and projected timelines for the initiation and completion of preclinical and clinical trials; the potential for the results of ongoing preclinical or clinical trials and the efficacy of either party’s drug candidates; the potential market opportunities and value of drug candidates; future product development and regulatory strategies, including with respect to specific indications; the combined company’s future financial performance, results of operations or sufficiency of capital resources to fund operating requirements; future NASDAQ listing; expectations regarding the combined company’s focus, operations, resources and development plan; expectations regarding synergies resulting from the proposed merger transaction; the executive and board structure of the combined company; expectations of the potential impact of the COVID-19 pandemic on resTORbio, Inc.’s (“resTORbio”), Adicet Bio, Inc.’s (“Adicet”) and the combined company’s strategy and future operations, including ability to access capital or obtain additional financing, and ability to conduct, and the timing of, clinical trials; and the potential payment of proceeds pursuant to the CVR Agreement by and between resTORbio, the Holders' Representative (as defined therein) and the Rights Agent (as defined therein) (as defined in the Agreement and Plan of Merger, dated April 28, 2020, by and among resTORbio, Adicet and Project Oasis Merger Sub, Inc.). The use of words such as, but not limited to, “believe,” “expect,” “estimate,” “project,” “intend,” “future,” “potential,” “continue,” “may,” “might,” “plan,” “will,” “should,” “seek,” “anticipate,” or “could” and other similar words or expressions are intended to identify forward-looking statements. Forward-looking statements are neither historical facts nor assurances of future performance. Instead, they are based on resTORbio’s current beliefs, expectations and assumptions regarding the future of resTORbio’s and Adicet’s business, future plans and strategies, clinical results and other future conditions. New risks and uncertainties may emerge from time to time, and it is not possible to predict all risks and uncertainties. No representations or warranties (expressed or implied) are made about the accuracy of any such forward-looking statements. There can be no assurance that the parties will be able to complete the proposed merger transaction on the anticipated terms, or at all. Such forward-looking statements are subject to a number of material risks and uncertainties including but not limited to: (i) risks associated with resTORbio’s ability to obtain the stockholder approval required to consummate the proposed merger transaction and the timing of the closing of the proposed merger transaction, including the risks that a condition to closing would not be satisfied within the expected timeframe or at all or that the closing of the proposed merger transaction will not occur; (ii) the outcome of any legal proceedings that may be instituted against the parties and others related to the merger agreement; (iii) unanticipated difficulties or expenditures relating to the proposed merger transaction, the response of business partners and competitors to the announcement of the proposed merger transaction, and/or potential difficulties in employee retention as a result of the announcement and pendency of the proposed merger transaction; (iv) the length of time necessary to consummate the proposed merger transaction may be longer than anticipated; (v) resTORbio’s continued listing on the NASDAQ Global Market until closing of the proposed merger transaction; (vi) the combined company’s listing on the NASDAQ Global Market after closing of the proposed merger transaction; (vii) the adequacy of the combined company’s capital to support its future operations and its ability to successfully initiate and complete clinical trials; (viii) the nature, strategy and focus of the combined company; (ix) the difficulty in predicting the time and cost of development of resTORbio’s and Adicet’s product candidates; (x) the executive management and board structure of the combined company; (xi) the risk that any potential payment of proceeds pursuant to the CVR Agreement may not be distributed at all or result in any value to resTORbio’s stockholders; (xii) Adicet’s plans to develop and commercialize its product candidates, including ADI-001; (xiii) the timing of initiation of Adicet’s planned clinical trials; (xiv) the timing of the availability of data from Adicet’s clinical trials; (xv) the timing of any planned investigational new drug application or new drug application; (xvi) Adicet’s plans to research, develop and commercialize its current and future product candidates; (xvii) Adicet’s ability to enter into new collaborations, and to fulfill its obligations under any such collaboration agreements; (xviii) the clinical utility, potential benefits and market acceptance of Adicet’s product candidates; (xix) Adicet’s commercialization, marketing and manufacturing capabilities and strategy; (xx) Adicet’s ability to identify additional products or product candidates with significant commercial potential; (xxi) developments and projections relating to Adicet’s competitors and its industry; (xxii) the impact of government laws and regulations; (xxiii) Adicet’s ability to protect its intellectual property position; (xxiv) Adicet’s estimates regarding future revenue, expenses, capital requirements and need for additional financing following the proposed merger transaction; and (xxv) those risks detailed in resTORbio’s preliminary proxy statement/prospectus/information statement filed with the U.S. Securities and Exchange Commission (the “SEC”) on June 23, 2020 (and when available, resTORbio’s definitive proxy statement/prospectus/information statement), as well as discussions of potential risks, uncertainties, and other important factors in resTORbio’s subsequent filings with the SEC. Any forward-looking statement speaks only as of the date on which it was made. None of resTORbio, Adicet, nor their affiliates, advisors or representatives, undertake any obligation to publicly update or revise any forward-looking statement, whether as result of new information, future events or otherwise, except as required by law. Industry and Market Information Information regarding market share, market position and industry data pertaining to Adicet’s, resTORbio’s and the combined company’s business contained in this presentation consists of estimates based on data and reports compiled by industry professional organizations and analysts and Adicet’s and resTORbio’s knowledge of their industry. Although Adicet and resTORbio believe the industry and market data to be reliable, this information could prove to be inaccurate. You should carefully consider the inherent risks and uncertainties associated with the market and other industry data contained in this presentation. Forward-looking information obtained from third-party sources is subject to the same qualifications and the additional uncertainties as the other forward-looking statements in this presentation.

Regulation M-A Legend Important Additional Information About the Proposed Merger and Where to Find It This communication relates to the proposed merger transaction involving resTORbio, Inc. (“resTORbio”) and Adicet Bio, Inc. (“Adicet”) and may be deemed to be solicitation material in respect of the proposed merger transaction. In connection with the proposed merger transaction, resTORbio has filed with the U.S. Securities and Exchange Commission (the “SEC”) a registration statement on Form S-4 (the “Form S-4”) that contains a preliminary proxy statement/prospectus/information statement. The Form S-4 has not yet become effective. After the Form S-4 is declared effective, a definitive proxy statement/prospectus/information statement will be mailed to the stockholders of resTORbio and Adicet. This communication is not a substitute for the Form S-4, the definitive proxy statement/prospectus/information statement or for any other document that resTORbio may file with the SEC and or send to resTORbio’s stockholders in connection with the proposed merger transaction. BEFORE MAKING ANY VOTING DECISION, INVESTORS AND SECURITY HOLDERS OF RESTORBIO ARE URGED TO READ THE FORM S-4, THE DEFINITIVE PROXY STATEMENT/PROSPECTUS/INFORMATION STATEMENT AND OTHER DOCUMENTS FILED WITH THE SEC CAREFULLY AND IN THEIR ENTIRETY WHEN THEY BECOME AVAILABLE BECAUSE THEY WILL CONTAIN IMPORTANT INFORMATION ABOUT RESTORBIO, THE PROPOSED MERGER TRANSACTION AND RELATED MATTERS. Investors and security holders will be able to obtain free copies of the Form S-4, the definitive proxy statement/prospectus/information statement and other documents filed by resTORbio with the SEC through the website maintained by the SEC at http://www.sec.gov. Copies of the documents filed by resTORbio with the SEC will also be available free of charge on resTORbio’s website at www.restorbio.com, or by contacting resTORbio’s Investor Relations at 212-362-1200. Participants in the Solicitation resTORbio, Adicet and their respective directors and certain of their executive officers may be considered participants in the solicitation of proxies from resTORbio’s stockholders with respect to the proposed merger transaction under the rules of the SEC. Information about the directors and executive officers of resTORbio is set forth in the preliminary proxy statement/prospectus/information statement, which was filed with the SEC on June 23, 2020, and in subsequent documents filed with the SEC. Additional information regarding the persons who may be deemed participants in the proxy solicitations and a description of their direct and indirect interests, by security holdings or otherwise, will also be included in the Form S-4, the definitive proxy statement/prospectus/information statement and other relevant materials to be filed with the SEC when they become available. You may obtain free copies of this document as described above. No Offer or Solicitation This communication does not constitute an offer to sell or the solicitation of an offer to buy any securities nor a solicitation of any vote or approval with respect to the proposed transaction or otherwise. No offering of securities shall be made except by means of a prospectus meeting the requirements of Section 10 of the U.S. Securities Act of 1933, as amended, and otherwise in accordance with applicable law.

Deal Rationale: About Adicet Bio Developing off-the-shelf, engineered Gamma-Delta (γδ) CAR-T cell therapy pipeline for oncology and other indications Key anticipated advantages of Adicet’s γδ CAR-T cell therapy: Express T-cell and NK cell receptors, facilitating adaptive and innate anti-tumor immune responses with more limited ability for tumor escape Inherent propensity to home to tissues and malignancies Off-the-shelf with potential to re-dose patients and with no expected GvHD cGMP-compliant manufacturing from healthy donors Proprietary T Cell Receptor-Like (TCR-L) monoclonal antibodies platform targeting intracellular targets presented on MHC complexes Established Partnership with Regeneron Leadership Team With Significant Operational and Development Expertise Post-merger Entity Expected to be Well Capitalized Into 2022 CAR: Chimeric Antigen Receptors; NK: Natural Killer; GvHD: Graft Versus Host Disease; MHC: Major Histocompatibility Complex; NKG2D: NK Group 2D; NCR=Natural Cytotoxicity Receptors; DNAM-1: DNAX accessory molecule-1 CAR DNAM-1 NCRs NCRs NKG2D γ δ

resTORbio/Adicet Bio Merger Close expected 2H 2020 New company expected to be listed on NASDAQ (ticker TBD) Board of Directors expected to include five designated by Adicet + one from resTORbio + CEO On a pro forma basis, current Adicet equityholders are expected to own approximately 75% of the combined company and current resTORbio equityholders are expected to own approximately 25% of the combined company

Post Merger Leadership Team Chen Schor President and CEO Stewart Abbot, PhD Chief Scientific and Operating Officer Carrie Krehlik Chief Human Resource Officer Lloyd Klickstein, MD, PhD Chief Innovation Officer Francesco Galimi, MD, PhD Chief Medical Officer

Improving Cancer Immunotherapy Presence of γδ T Cells Observed to Strongly Correlate with Positive Clinical Outcomes Meraviglia et al. 2017 Improved Disease Free Progression Colorectal Cancer γδ T cell hi γδ T cell lo γδ T cell lo / IFNγ lo Pan-Cancer: Improved Overall Prognosis Gentles et al. 2015 Godder et al. 2007 Post-HSCT Improved Survival γδ T cell hi γδ T cell lo Overall Survival HSCT: Hematopoietic Stem Cell Transplantation

Building a Broad Pipeline of First in Class γδ CAR T Cell Therapy NH: Non-Hodgkin’s ; HCC: hepatocellular carcinoma Program Target Indication Discovery Preclinical IND Phase 1 Phase 2 ADI-001 CD20 NH Lymphoma ADI-002 GPC3 HCC ADI-00x Undisclosed Solid Tumors ADI-00x Multiple Solid and Heme

Adicet Strategic Priorities File IND for ADI-001 CD20 gamma-delta CAR-T Initiate Phase 1 clinical study in non-Hodgkin’s lymphoma File IND for ADI-002 GPC3 gamma-delta CAR-T Initiate Phase 1 in hepatocellular carcinoma Expand pipeline in oncology and other diseases Achieve milestones from collaboration with REGN

ADI-001: Allogeneic (CD20-CAR-γδ T Cell)

Large-Scale Manufacture of γδ T Cells Simplify for Robustness, Partner for Capability and Capacity Leukopheresis from a qualified donor Activate desired subsets of γδ T cells Engineer γδ T cells with CARs Expand ICP Cell Bank of final “Off the Shelf” ICP Treatment of multiple patients Production Process for γδ Immune Cell Product (ICP)

Key Anticipated Advantages of Adicet’s Allogeneic γδ T Cell Platform Innate and adaptive immunity imparted by TCR and NK receptors May mitigate tumor relapse MHC-independent tumor targeting Off-the-shelf product, potential to re-dose No / low potential to cause GvHD Potent IFNγ production Potential for integrin-mediated trafficking to solid tumors Scalable manufacturing from healthy donors Not compromised by patient’s immune system dysfunction γδ T cells express multiple tumor-recognizing receptors CAR DNAM-1 NCRs NCRs NKG2D γ δ IFNy: Interferon gamma

Anticipated Differentiation From Other Allogeneic CAR-T Therapies Allogeneic CAR-T Therapy Attributes Allogeneic CAR αβ T Cells Allogeneic CAR γδ T Cells Activity Recognize and bind tumor Predominantly CAR-mediated CAR and innate receptors Effectively kill tumor Predominantly CAR-CD8 αβ T subset All Vδ1 T cells* Active tumor homing Limited compared to normal tissues Tissue homing TCR deletion Required; May affect efficacy and persistence Not required Safety GvHD risk No (Requires deletion of αβ TCR) No Cytokine release syndrome ≥ grade 3 risk Likely Unlikely, due to limited IL-2 secretion Practicality Robust and cost effective manufacturing Gene editing + CAR transduction required CAR transduction required Scalable manufacturing Limited without exhaustion Yes *Adicet’s γδ T cell products are predominantly Vδ1 cells

CD20 CAR γδ T Cells Effectively Control Aggressive Lymphoma Tumors in Mice† Untreated animals succumb to highly aggressive tumors within 3 weeks 2nd generation (employing two co-stimulation domains) CD20 CAR γδ T cells effectively control multiple disseminated (iv) and localized (sc) tumors γδ T cell treatment initiated* when tumor volume ≥ 200mm3 Subcutaneous Mino Tumor Growth -5 0 5 10 15 20 25 30 35 0 1×10 10 2×10 10 3×10 10 4×10 10 5×10 10 6×10 10 7×10 10 M e a n T o t a l F l u x ( p / s ) + / - S E M Subcutaneous Raji Tumor Growth Intravenous Granta Tumor Growth Intravenous Raji Tumor Growth * * * * †internal Adicet study

CD20 γδ CAR-T Cells Effectively Control Repeat Lymphoma Challenges Repeat tumor challenge is one of the most stringent tests of anti-tumor activity CD20 CAR γδ T cell treatment initiated* when tumor volume ≥ 200mm3 Excellent tumor control in all animals at day 55 Secondary tumor challenge at day 60 CD20 CAR γδ T continue to control tumor growth to 100 days * †internal Adicet study †

CD20 CAR γδ T Cells Proliferate in Response to Activation in Tumors Substantial and specific target-mediated proliferation of CD20 CAR γδ T cells in localized lymphoma tumors at 6 days post treatment † Blood Spleen Liver Bone marrow Tumor Cell Number T cell Proliferation Day 2 Post-treatment CAR-T γδ Day 6 Post-treatment CAR-T γδ Blood Spleen Liver Tumor Bone marrow T cell Proliferation T cell Proliferation Day 6 Post-treatment CAR-T αβ †internal Adicet study

Intravenous Raji Tumor in SRG-15 Mice† Absence of GvHD with CD20 CAR γδ T Cells No GvHD observed in mice treated with γδ T cells γδ T cells not expected to induce GvHD in clinical study No gene editing required to overcome GvHD with γδ T cells αβ CAR-T cell group succumbed to GvHD αβ CART cells CAR γδ T cells Tumor alone Days Post Treatment Percentage Surviving †internal Adicet study; SRG-15 mice express human IL-15 transgene

Clinical Development Plan of ADI-001 Phase 1 study design NHL patients relapsing from 2 or more prior lines of treatment ~3 cohorts for dose escalation/safety Up to 50 patients at the selected dose Single treatment with ADI-001 Option for retreatment in select patients Pivotal study likely in DLBCL and/or MCL Target product profile of ADI-001 (CD20 CAR γδ T cells derived from healthy donor) Effective (ORR, PFS/OS) in CD20 expressing NHL Significantly lower cytokine release syndrome No GvHD DLBCL: Diffuse Large B Cell Lymphoma; MCL: Mantle Cell Lymphoma

ADI-001 Status Pre-IND meeting completed IND application enabling activities in process ADI-001 IND application preparation in process Proposed ADI-001 clinical trial design well received by key centers and KOLs Preparations for ADI-001 Phase 1 Clinical study underway

Additional Pipeline in Solid Tumors: ADI-002

Anticipated Advantages of Adicet’s γδ CAR-T Cell Therapy in Solid Tumors Solid Tumor Therapy Goal Adicet γδ CAR-T Cell Anticipated Advantage Avoiding autologous cell exhaustion / dysfunction Healthy CMV-negative donor derived product preserves Vδ1 proliferative capacity Potential for >30 population doublings ex vivo / in vivo Specific tumor-induced activation & proliferation Activation-induced PD-1 expression is reversible without exhaustion CAR-designs minimize tonic signaling Cells Infiltration into Tumor Chemokine receptor and adhesion molecule mediated infiltration Immunosuppressive Tumor Microenvironment Further engineering can improve responses to tumor microenvironment factors Loss of HLA or Target Antigen(s) Expression HLA-independent γδ T cell innate receptor-mediated tumor recognition Paucity of tractable targets Ability to target intracellular antigens CMV: Cytomegalovirus; HLA: Human Leukocyte Antigen

ADI-002: GPC3 is highly expressed on a broad range of solid tumors, with limited expression levels on normal tissues Baumhoer et al., Am J Clin Pathol 2008;129:899-906 Ho et al., PLoS ONE 2012; 7: e37159 IHC Detection of GPC3 in human HCC vs normal liver Adicet Bio Confidential Tumor Non-tumor

Dose Dependent Anti-Tumor Effect of Vδ1 CAR-T Cells with GPC3-Targeting sIL15 CAR γδ1 T Cells in Liver Cancer Model † GPC3-targeting chimeric antigen receptor construct also encodes secretion of IL15 Single dose CAR γδ T cell treatment was initiated* when tumor volumes reached ~200mm3 Excellent CAR γδ T dose-dependent control of tumor growth Tumor alone GPC3 CAR γδT – low dose GPC3 CAR γδT– medium dose GPC3 CAR γδT– high dose Adicet Bio Confidential †internal Adicet study

Anticipated Advantage of ADI-002 in HCC Potential to address low target tumor densities CAR-dependent and CAR-independent tumor targeting Optimizing γδ T cells to overcome tumor microenvironment-mediated immunosuppression Enhancing persistence of CAR-γδ T cells Favorable preclinical results Opportunities in multiple tumor types Adicet Bio Confidential

TCR-L Platform: Intracellular Solid Tumor Targets

TCR-L Platform: CAR-T Using Intracellular Solid Tumor Targets Challenge Lack of disease-specific cell surface targets in solid tumors (80% of proteins are intracellular) TCR-L Proposed Solution Ability to target disease-specific intracellular proteins via peptide MHC complexes highly expands the target pool Unlikely to express on normal cells Adicet has generated multiple TCR-Like (TCR-L) antibodies to various intracellular targets in key solid tumor indications Mimic TCR specificity with mAb affinity scFv for chimeric antigen receptors for cellular therapy Tyr CAR γδ T cells Tumor alone Day Post Treatment WM266.4 Tumor Growth in NSG Mice †internal Adicet study †

Backup Slides

CD20 CAR γδ T Cells Potently Kill Multiple Lymphoma Cell Lines in vitro † Potent activity against tumors expressing high and low levels of CD20 Potent activity against tumors expressing HLA-Class 1 or HLA-Class 1 null CD20 CAR potentiates initial innate tumor recognition and killing Will-2 cells were originally derived from a Rituxan -Resistant Patient Raji (~54,000 CD20 /cell) Mino (>90,000 CD20/cell) WILL-2 (<1000 CD20 /cell) CD20 CAR Vδ1 cells Un-engineered Vδ1 cells †internal Adicet study Daudi (>50,000 CD20 /cell, HLA-null)

Adicet: Leader in CAR & TCR Engineered γδ1 T cells Adicet is a leader in the development of CAR-modified healthy donor-derived γδ1 T cell therapies Source: Adapted from Immuno-Oncology Technology 1 (2019) 3–10 Company T-cell type Source Gadeta αβ Blood GammaDelta Therapeutics γδ1 Skin/Blood TC Biopharm γδ1, γδ2 Blood Immatics γδ2 Blood Incysus γδ2 Blood

Anticipated Differentiation From Bispecific Antibody T cell Recruitment for Tumor Immunotherapy *Adicet’s γδ T cell products are predominantly Vδ1 cells Attribute Bispecific Antibodies Allogeneic CART γδ T Cells Potency Requires “healthy” patient T cells Yes No Tumor recognition by multiple receptors No Yes Potential to overcome tumor escape No Yes Tumor accumulation Passive Active Safety Cytokine release syndrome & neurotoxicity risk Similar to autologous CAR-T therapy Likely limited due to low IL-2 secretion Bispecific antibodies, including T cell redirecting antibodies (TRAB), bispecific T cell engagers (BiTE) and others, are designed to crosslink patient effector cells to patient target cells, typically tumor cells. Most of these target CD3 on the T cell, so all T cells are recruited and most activity is due to αβ T cells.

*Adicet’s γδ T cell products are predominantly Vδ1 cells Attribute Bispecific Antibodies Allogeneic CART γδ T Cells Potency MHC-unrestricted tumor recognition Yes Yes Inhibitory and activating receptor expression Balanced Predominantly activating Tumor-induced secretion of multiple cytokines Limited Extensive Prognostic value of tumor infiltration Modest High Safety Large-Scale Manufacture Limited Practical Reviewed by Adicet and Jim Krenn at MoFo

Intellectual Property Portfolio Composition of matter for CAR constructs, TCRL constructs, engineered γδ T cells products ADI-001 exclusivity in the US expected to expire in 2038 (not taking into account H-W extension) Antigen binding domains directed to certain targets Reagents, related protocols and resulting compositions of matter for the selective expansion of γδ T cells populations License to TCRL technology and use in cancer, viral infections and autoimmune diseases Methods of use for treatment in certain indications Manufacturing processes, preconditioning methods and dosing regimens Patent applications pending

Regeneron Collaboration In conjunction with Regeneron, Adicet discovers and develops γδ T cells engineered with CARs and TCRs Adicet has the right to use certain of Regeneron’s proprietary mice Five-year research collaboration signed July 2016 Adicet has the right to develop and commercialize the first collaboration target (ADI-001) At IND, Regeneron has an option to exercise exclusive rights for ADI-002 and potentially for additional targets to be mutually agreed upon In case Regeneron exercises an option, Adicet will receive an option exercise fee and has the right to co-fund, co-promote and profit-share in such product OR receive royalties

Adicet’s Key Anticipated Differentiation From γδ T cell Competitors Robust and practical proprietary antibody-based manufacturing method for γδ T cells Unique ability to selectively expand multiple γδ T cell subpopulations Large-scale expansion of blood-derived γδ T cells Production of highly potent Vδ1 (tumor cytolysis and cytokine production) Ability to kill tumor cells expressing low level of target antigens (~100 copies per cell) No potentially pro-tumorigenic Th17-type responses in Adicet’s Vδ1 subpopulation In-house chimeric antigen receptor (CAR) target identification and verification process Ability to effectively target tumor-specific intracellular protein-derived peptides using proprietary T cell receptor-like antibodies (TCRLs) Capacity to develop TCRLs as CARs, bispecific antibodies or ADCs

2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 CAR-T Cell Therapy Journey 2015 Adicet Bio Founded ~2017 Yescarta approved by US FDA for r/r DLBCL 2012 U. Penn CART19 assets acquired by Novartis 2017 Kite Pharma acquired for $11.9B 2013 Juno Therapeutics founded 2009 Kite Pharma Founded 2017-19 Adicet Bio preclinical data 2021 Adicet Bio clinical data expected 2018 Allogene IPO 2018 Juno Therapeutics acquired for $9B 2017 Allogene founded Adicet Bio Confidential ~2017 Kymriah approved by US FDA for r/r ALL

About Adicet Bio Founded in 2015 with $44M Series A financing Completed $80M Series B financing in September 2019 Developing off-the-shelf, engineered allogeneic γδ T cell therapy for oncology indications and other diseases cGMP-compliant manufacturing from healthy donors Proprietary intracellular tumor-selective targeting platform: T Cell Receptor-like monoclonal antibodies (TCR-L) for treatment of solid tumors Strategic partnership with Regeneron

RTB101: Potent Target of rapamycin complex 1 (TORC1) inhibitor

RTB101 Expect to continue the development of RTB101 for a COVID-19 related indication, with clinical data expected by Q1 2021. The terms of the merger agreement contemplate that a contingent value right (a “CVR”) will be distributed to resTORbio stockholders as of the effective time of the merger, entitling CVR holders to receive net proceeds from the commercialization, if any, received from a third party commercial partner of the product candidate RTB101.