Phase 3 registrational trial of mavacamten in Chinese patients with symptomatic obstructive hypertrophic cardiomyopathy (oHCM) ongoing Mavacamten granted breakthrough therapy designation in China for the treatment of patients with oHCM Infigratinib approved under special named patient program for the treatment of cholangiocarcinoma (CCA) in the Bo’Ao pilot zone of Hainan Province in China Three additional pipeline programs expected to enter into registrational Phase 3 clinical trials in China by year-end 2022 Cash balance of $403.2 million with runway through 2023 SHANGHAI and PRINCETON, N.J., March 30, 2022 (GLOBE NEWSWIRE) — LianBio (Nasdaq: LIAN), a biotechnology company dedicated to bringing innovative medicines to patients in China and other major Asian markets, today reported financial results for the fourth quarter and year ended December 31, 2021. “We are proud of our progress over the past year, highlighted by the achievement of key clinical and corporate milestones, including the initiation of the Phase 3 EXPLORER-CN trial of mavacamten in Chinese patients with symptomatic oHCM, and the approval of infigratinib for the treatment of cholangiocarcinoma patients in the Hainan Province in China,” said Yizhe Wang, Ph.D., Chief Executive Officer of LianBio. “LianBio continues to advance our pipeline of clinically validated therapeutic candidates and we plan to initiate pivotal studies of three additional programs, TP-03, NBTXR3 and infigratinib, in China by year-end. We remain focused on our cross-border development strategy and are committed to building our pipeline of novel medicines for patients in Greater China and other Asian markets.” Recent Business Highlights and Clinical Development Updates Phase 3 EXPLORER-CN trial of mavacamten in symptomatic oHCM patients initiated and PK trial dosing completed In November 2021, LianBio initiated and completed enrollment and dosing in a pharmacokinetic (PK) study of mavacamten in healthy Chinese volunteers. In January 2022, LianBio initiated the Phase 3 EXPLORER-CN clinical trial of mavacamten in Chinese patients with symptomatic oHCM. In February 2022, LianBio’s partner Bristol Myers Squibb (BMS) announced positive topline results from the Phase 3 VALOR-HCM trial, evaluating mavacamten in patients with oHCM who are eligible for septal reduction therapy.In February 2022, LianBio announced that the Center for Drug Evaluation (CDE) of the National Medical Products Administration (NMPA) granted Breakthrough Therapy Designation in China for mavacamten for the treatment of patients with oHCM. Infigratinib approved for the treatment of CCA in the Bo’ao pilot zone of Hainan Province In December 2021, infigratinib received approval from the Health Commission and Medical Products Administration of Hainan Province, under the special Named Patient Program (NPP), for the treatment of patients with previously treated, unresectable locally advanced or metastatic cholangiocarcinoma with a FGFR2 fusion or other rearrangement. The approval enables early commercial access to infigratinib in the Bo’ao Lecheng International Medical Tourism Pilot Zone based on the drug’s approval in other global jurisdictions. Expanded leadership team with key executive hires and named two additions to board of directors In October 2021, LianBio named Michael Humphries, MBBS, as Chief Scientific Advisor to guide research and development (R&D) strategy, advance the pipeline, and lead assessment of new in-licensing opportunities.In October 2021, LianBio appointed Jesse Wu and Susan Silbermann to the Board of Directors. Raised $334.5 million of gross proceeds from IPO In November 2021, LianBio raised gross proceeds of $334.5 million and aggregate net proceeds of $304.8 million in connection with its initial public offering and subsequent exercise of the underwriters’ option to purchase additional ADSs. Key Anticipated Milestones Expected in 2022 MavacamtenBMS-partnered cardiac myosin inhibitor in development for the treatment of hypertrophic cardiomyopathy and certain forms of heart failure LianBio’s partner BMS has announced a Prescription Drug User Fee Act (PDUFA) target action date of April 28, 2022 for its New Drug Application to the U.S. Food and Drug Administration (FDA) for mavacamten for the treatment of patients with oHCM. TP-03Tarsus Pharmaceuticals-partnered GABA-Cl channel blocker in development for the treatment of Demodex blepharitis (DB) and meibomian gland disease LianBio expects to initiate a Phase 3 trial of TP-03 in Chinese patients with DB in the second half of 2022 to support regulatory approval in China.LianBio’s partner Tarsus has announced that it expects to report topline data in April 2022 from the ongoing Phase 3 Saturn-2 trial of TP-03 in DB patients. NBTXR3Nanobiotix-partnered radioenhancer in development for multiple solid tumor indications LianBio expects to begin dosing Chinese patients in Nanobiotix’s ongoing global pivotal Phase 3 trial of NBTXR3 for the treatment of locally advanced head and neck squamous cell carcinoma in elderly patients ineligible for cisplatin in the second half of 2022. Infigratinib QED-partnered FGFR1-3 inhibitor in development for the treatment of individuals with FGFR-driven cancers LianBio expects to begin dosing Chinese patients in QED’s ongoing global pivotal Phase 3 PROOF-301 trial of infigratinib in first-line CCA patients with FGFR2 gene fusions/translocations in the second half of 2022. Fourth Quarter and Full-Year 2021 Financial Results: Research & Development Expenses R&D Expenses: Research and development expenses were $7.7 million for the fourth quarter of 2021 compared to $2.7 million for the fourth quarter of 2020, and $158.7 million for the year ended December 31, 2021 compared to $120.9 million for the year ended December 31, 2020. The increase was primarily attributable to increased milestone payments and development activities to support clinical trials and personnel-related expenses (including share-based compensation expense) as a resultof increased employee headcount, development activities to support our clinical trials and professionalfees. General & Administrative Expenses G&A Expenses: General and administrative expenses were $14.4 million for the fourth quarter of 2021 compared to $6.5 million for the fourth quarter of 2020, and $36.9 million for the year ended December 31, 2021 compared to $14.0 million for the year ended December 31, 2020. The increase was primarily attributable to increases in payroll and personnel-related expenses (including share-based compensation expense) for increased employee headcount and increases in legal service costs, consulting costs and accounting services. Net Loss Net Loss: Net loss was $21.2 million for the fourth quarter of 2021 compared to net loss of $12.7 million for the fourth quarter of 2020, and $196.3 million for the year ended December 31, 2021 compared to $139.6 million for the year ended December 31, 2020. Cash Balance Cash balance: Cash, cash equivalents, marketable securities, and restricted cash at December 31, 2021 totaled $403.2 million, reflecting a net increase of $148.9 million from December 31, 2020. LianBio projects its cash position is sufficient to fund current operations through 2023. About LianBio LianBio is a cross-border biotechnology company on a mission to bring transformative medicines to historically underserved patients in China and other Asian markets. Through partnerships with highly innovative biopharmaceutical companies around the world, LianBio is advancing a diversified portfolio of clinically validated product candidates with the potential to drive new standards of care across cardiovascular, oncology, ophthalmology, inflammatory disease and respiratory indications. LianBio is establishing an international infrastructure to position the company as a partner of choice with a platform to provide access to China and other Asian markets. Cautionary Note Regarding Forward-Looking Statements Statements in this press release about future expectations, plans and prospects, as well as any other statements regarding matters that are not historical facts, may constitute forward-looking statements. The words “anticipate,” “believe,” “continue,” “could,” “estimate,” “expect,” “intend,” “may,” “plan,” “potential,” “predict,” “project,” “should,” “target,” “will,” “would” and similar expressions are intended to identify forward-looking statements, although not all forward-looking statements contain these identifying words. Forward-looking statements in this press release include, but are not limited to, statements concerning the Company’s plans and expectations with respect to the initiation and completion of its clinical trials, the advancement of its pipeline of therapeutic candidates, its ability to bring transformative medicines to patients across Asia, the availability of new in-licensing opportunities, and the timeline through which it expects to be able to fund its operating expenses and capital expenditure requirements, as well as statements regarding our partners’ announced plans and expectations with respect to their planned product development activities, preclinical studies and clinical trials. Actual results may differ materially from those indicated by such forward-looking statements as a result of various important factors, including: the Company’s ability to successfully initiate and conduct its planned clinical trials and complete such clinical trials and obtain results on its expected timelines, or at all; the Company’s plans to leverage data generated in its partners’ global registrational trials and clinical development programs to obtain regulatory approval and maximize patient reach for its product candidates; the Company’s ability to identify new product candidates and successfully acquire such product candidates from third parties; competition from other biotechnology and pharmaceutical companies; general market conditions; the impact of changing laws and regulations and those risks and uncertainties described in LianBio’s filings with the U.S. Securities and Exchange Commission (SEC), including LianBio’s final prospectus for its initial public offering dated October 31, 2021 and subsequent filings with the SEC. Any forward-looking statements contained in this press release speak only as of the date hereof, and LianBio specifically disclaims any obligation to update any forward-looking statement, whether as a result of new information, future events or otherwise. Readers should not rely upon this information as current or accurate after its publication date. For investor inquiries, please contact:IR@lianbio.com For media inquiries, please contact: katherine.smith@canalecomm.com LianBioConsolidated Balance Sheets(In thousands, except share and per share amounts) (Unaudited) December 31,2021 December 31,2020Assets Current assets: Cash and cash equivalents $228,182 $254,350 Marketable securities 155,067 — Prepaid expenses and other current assets 10,354 2,396 Other receivable 6,044 20,000 Total current assets 399,647 276,746 Restricted cash, non-current 20,000 — Property and equipment, net 1,882 822 Operating lease right-of-use assets 4,763 1,706 Other non-current assets 51 12 Total assets $426,343 $279,286 Liabilities, Redeemable Convertible Preferred Shares and Shareholders’ Equity (Deficit) Current liabilities: Accounts payable $3,231 $4,329 Accrued expenses 9,976 998 Current portion of operating lease liabilities 1,125 539 Other current liabilities 760 360 Total current liabilities 15,092 6,226 Operating lease liabilities 3,709 1,341 Other liabilities 206 — Nonrefundable research deposit 20,000 20,000 Total liabilities 39,007 27,567 Commitments and contingencies (Note 8) Redeemable convertible preferred shares, $0.0001 par value. No shares authorized, issued and outstanding at December 31, 2021; 10,971,231 shares authorized, issued, and outstanding as of December 31, 2020 — 349,789 Shareholders’ equity (deficit): Ordinary shares, $0.000017100448 par value. Authorized 2,923,900,005 shares as of December 31, 2021; 107,275,458 shares issued and outstanding at December 31, 2021; Authorized 2,859,742,435 shares as of December 31, 2020; 20,477,338 shares issued and outstanding at December 31, 2020 2 — Additional paid-in capital 713,269 31,132 Accumulated other comprehensive income (loss) 526 (40)Accumulated deficit (360,235) (163,935)Total LianBio shareholders’ equity (deficit) 353,562 (132,843)Non-controlling interest 33,774 34,773 Total shareholders’ equity (deficit) 387,336 (98,070)Total liabilities, redeemable convertible preferred shares and shareholders’ equity (deficit) $426,343 $279,286 LianBioStatements of Operations and Comprehensive Loss(In thousands, except share and per share amounts) (Unaudited) Three Months EndedDecember 31, 2021 Three Months EndedDecember 31, 2020 Year EndedDecember 31, 2021 Year EndedDecember 31, 2020Operating expenses: Research and development 7,653 2,712 158,692 120,885 General and administrative 14,383 6,492 36,878 13,984 Total operating expenses 22,036 9,204 195,570 134,869 Loss from operations (22,036) (9,204) (195,570) (134,869)Other income (expense): Interest income (expense), net 72 (3,574) 243 (4,854)Other (expense) income, net (265) 42 (455) 123 Net loss before income taxes (22,230) (12,736) (195,782) (139,600)Income taxes (benefit) expense (1,035) — 518 4 Net loss (21,195) (12,736) (196,300) (139,604)Other comprehensive income (loss): Foreign currency translation income (loss), net of tax 408 25 512 (40)Unrealized gain on marketable securities, net of tax 54 — 54 — Comprehensive loss $(20,733) $(12,711) $(195,734) $(139,644)Net loss per share attributable to ordinary shareholders, basic and diluted $(0.28) $(0.73) $(5.71) $(11.58)Weighted-average shares outstanding used in computing net loss per share attributable to ordinary shareholders, basic and diluted 75,479,076 17,369,481 34,394,622 12,051,433