Instil Bio Reports Fourth Quarter and Full Year 2022 Financial Results and Provides Corporate Update

Instil confirms cash runway beyond 2026

ITIL-306 phase 1 study anticipated to receive CTA clearance from UK MHRA in 2H’2023

Anticipate initial clinical data from ITIL-306 phase 1 program in 2024

DALLAS, March 31, 2023 (GLOBE NEWSWIRE) — Instil Bio, Inc. (“Instil”) (NASDAQ: TIL), a clinical-stage biopharmaceutical company focused on developing tumor infiltrating lymphocyte, or TIL, therapies for the treatment of patients with cancer, today reported its fourth quarter and full-year 2022 financial results and provided a corporate update.

Fourth Quarter 2022 Highlights and Anticipated Milestones:

• Instil confirms cash runway beyond 2026 with consolidation of R&D operations to the UK: In January 2023, the Company announced the consolidation of the Phase 1 clinical trial and related manufacturing of CoStAR-TIL™ to its active operations in Manchester, UK leading to an extension of the expected cash runway to beyond 2026. Instil’s Manchester, U.K. operations have extensive experience and success in the manufacture and development of TIL and other cell therapy products since 2011. Instil continues to pursue a potential lease or sale of its commercial manufacturing facility in Tarzana, California. Under the current operating plan, starting in the second half of 2023, we expect quarterly cash burn of less than $10 million through the end of 2024.
• ITIL-306 phase 1 study in UK anticipated to initiate in 2H’2023: Instil anticipates initiating a phase 1 study of ITIL-306 in the United Kingdom in the second half of 2023 following anticipated Clinical Trial Application, or CTA, clearance from the Medicines and Healthcare products Regulatory Agency, or MHRA. Instil anticipates initial clinical data from the ITIL-306 program in 2024.
• Prioritization of ITIL-306 after discontinuation of ITIL-168 and subsequent consolidation to the UK for manufacturing: After a voluntary pause of the DELTA-1 trial for ITIL-168 in October 2022 due to a decreased rate of successful manufacturing of ITIL-168, the Company discontinued the program in December 2022 and announced a reduction in U.S. headcount and prioritization of CoStAR-TIL programs, including ITIL-306.

Fourth Quarter 2022 Financial and Operating Results:

As of December 31, 2022, Instil had $260.9 million in total cash and cash equivalents and marketable securities, comprised of $43.7 million in cash and cash equivalents and $217.2 million in marketable securities, compared to $454.1 million in total cash and cash equivalent and marketable securities, comprised of $37.6 million in cash and cash equivalents and $416.5 million in marketable securities, as of December 31, 2021. Instil expects that its cash, cash equivalents and marketable securities as of December 31, 2022 will enable it to fund its operating plan beyond 2026.

Research and development expenses were $20.7 million and $141.1 million for the fourth quarter and full year ended December 31, 2022, respectively, compared to $42.6 million and $107.3 million for the fourth quarter and full year ended December 31, 2021, respectively.

General and administrative expenses were $12.9 million and $62.2 million for the fourth quarter and full year ended December 31, 2022, respectively, compared to $11.2 million and $48.3 million for the fourth quarter and full year ended December 31, 2021, respectively.

Restructuring and impairment charges were $23.2 million for the fourth quarter and full year ended December 31, 2022.

Note Regarding Use of Non-GAAP Financial Measures

In this press release, Instil Bio has presented certain financial information that has not been prepared in accordance with U.S. generally accepted accounting principles (“GAAP”). These non-GAAP financial measures include non-GAAP net loss and non-GAAP net loss per share, which are defined as net loss and net loss per share, respectively, excluding non-cash stock-based compensation expense. Instil Bio believes that these non-GAAP financial measures, when considered together with the GAAP figures, can enhance an overall understanding of Instil Bio’s financial performance. The non-GAAP financial measures are included with the intent of providing investors with a more complete understanding of Instil Bio’s operating results. In addition, these non-GAAP financial measures are among the indicators Instil Bio’s management uses for planning purposes and to measure Instil Bio’s performance. These non-GAAP financial measures should be considered in addition to, and not as a substitute for, or superior to, financial measures calculated in accordance with GAAP. The non-GAAP financial measures used by Instil Bio may be calculated differently from, and therefore may not be comparable to, non-GAAP financial measures used by other companies. Please refer to the below reconciliation of these non-GAAP financial measures to the comparable GAAP financial measures.

* Non-GAAP net loss per share, basic and diluted may not total due to rounding.

About Instil Bio

Instil Bio, Inc. (Nasdaq: TIL) is a clinical-stage biopharmaceutical company focused on developing TIL therapies for the treatment of patients with cancer. Instil has assembled an accomplished management team with a successful track record in the research, development and manufacture of cell therapies. Using its proprietary and optimized manufacturing processes at its in-house manufacturing facilities, Instil is developing a novel class of genetically engineered TIL therapies using its Co-Stimulatory Antigen Receptor, or CoStAR™, platform, including ITIL-306, a next-generation, genetically-engineered TIL therapy using the CoStAR platform, for multiple solid tumors. For more information visit www.instilbio.com.

Forward-Looking Statements

This press release contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. Words such as “anticipates,” “believes,” “expects,” “future,” “intends,” “plans,” “potential,” “projects,” and “will” or similar expressions are intended to identify forward-looking statements. Forward-looking statements include statements concerning or implying the therapeutic potential of our product candidates, our research, development and regulatory plans for our product candidates, including our expectations of CTA clearance from the MHRA, the timing of our ongoing and potential future clinical trials and studies and the availability of data therefrom, including our expectations concerning the initiation of, and timing of updates, on our ITIL-306 clinical trial in the United Kingdom, the potential for us to make submissions concerning, and for our product candidates to receive, regulatory approval from the FDA, MHRA or equivalent foreign regulatory agencies and whether, if approved, these product candidates will be successfully distributed and marketed, the anticipated sale or lease of our Tarzana, California manufacturing facility, our cash runway and quarterly cash burn, and other statements that are not historical fact. Forward-looking statements are based on management’s current expectations and are subject to various risks and uncertainties that could cause actual results to differ materially and adversely from those expressed or implied by such forward-looking statements, including risks and uncertainties associated with the costly and time-consuming cell therapy product development process and the uncertainty of clinical success, including risks related to failure or delays in successfully initiating, enrolling, reporting data from or completing clinical studies, as well as the risks that results obtained in clinical trials to date may not be indicative of results obtained in ongoing or future trials and that Instil’s product candidates may otherwise not be effective treatments in their planned indications; macroeconomic conditions, including as a result of the ongoing COVID-19 pandemic, the ongoing conflict between Russia and Ukraine, bank failures and other factors, which could materially and adversely affect Instil’s business and operations, including Instil’s ability to timely initiate, enroll and complete its ongoing and future clinical trials; the time-consuming and uncertain regulatory approval process; risks inherent in manufacturing and testing of cell therapy products; the sufficiency of Instil’s cash resources, and other risks and uncertainties affecting Instil and its development programs, including those discussed in the section titled “Risk Factors” in our Annual Report on Form 10-K for the year ended December 31, 2022 to be filed with the SEC. Additional information will be made available in other filings that we make from time to time with the SEC. Accordingly, these forward-looking statements do not constitute guarantees of future performance, and you are cautioned not to place undue reliance on these forward-looking statements. These forward-looking statements speak only as the date hereof, and we disclaim any obligation to update these statements except as may be required by law.

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