Rosnilimab

Completed spin-off of First Tracks Biotherapeutics, Inc., its former biopharma operations business Now exclusively manages the financial collaborations for Jemperli with GSK and imsidolimab with Vanda Announced appointment of Chris Murphy as CFO Announced appointments of Susannah Gray , former CFO of Royalty Pharma, and Owen Hughes , current CEO of XOMA Royalty, to its Board of Directors SAN DIEGO , May 12, 2026 (GLOBE NEWSWIRE) -- AnaptysBio, Inc. (Nasdaq: ANAB), a company focused on managing the financial collaborations for Jemperli with GSK and imsidolimab with Vanda, today reported financial results for the first quarter ended March 31, 2026 , and provided a business update. “Following the completion of the spin-off of First Tracks Bio in late April, Anaptys now exclusively manages the financial collaborations for Jemperli and imsidolimab, with streamlined operations requiring limited FTEs, minimal operating expenses and delivering an EBIT margin greater than 95%,” said Daniel Faga , president and chief executive officer. “With Chris Murphy joining as CFO, who brings deep business development and investment banking experience, our priority continues to be to protect our two royalty streams and return their value to shareholders.” GSK Jemperli Financial Collaboration GSK announced strong commercial performance for Jemperli ( $313 million /£232 million in Q1 2026 sales, with >40% year-over-year growth1) Anaptys continues to expect to achieve > $390 million in annualized Jemperli royalties payable to Anaptys as early as 2029 at GSK’s peak sales guidance of > $2.7 billion 2 Anaptys estimates Sagard will have accrued ~$275 million in royalties and sales milestones through Q1 2026 and anticipates paydown of the remaining ~$325 million non-recourse debt monetization by the end of Q2 20273 Substantial GSK investment in additional monotherapy and potential combination trials for Jemperli, including: AZUR-1 – pivotal Phase 2 – dostarlimab monotherapy in untreated stage II/III dMMR/MSI-H locally advanced rectal cancer Data expected in H2 2026; U.S. FDA Breakthrough Therapy Designation Received an FDA Commissioner’s National Priority Voucher (CNPV) in Nov. 2025 allowing for only a one to two-month sBLA review timeline for US FDA approval AZUR-2 – pivotal Phase 3 – dostarlimab versus standard of care in untreated TN40 or stage III dMMR/ MSI-H resectable colon cancer Data expected in 2028 AZUR-4 – Phase 2 – dostarlimab plus chemotherapy versus standard of care (chemotherapy) in untreated stage III MMRp/MSS resectable colon cancer Data expected in Q4 2026 JADE – pivotal Phase 3 – dostarlimab monotherapy versus placebo in locally advanced unresected head and neck squamous cell carcinoma (PD-L1 CPS≥1) post chemoradiation Data expected in 2028 Vanda Imsidolimab Financial Collaboration FDA target action date (PDUFA) of Dec. 12, 2026 for imsidolimab in generalized pustular psoriasis (GPP) Recent Leadership and Board of Directors Appointments Announced appointment of Chris Murphy as Chief Financial Officer (CFO) Mr. Murphy brings >20 years’ experience in business development, commercial operations, corporate strategy and investment banking in the biopharmaceutical industry Announced appointment of industry veterans Susannah Gray and Owen Hughes to Board of Directors Ms. Gray brings >25 years’ experience in both finance and investment banking in the biopharmaceutical industry, formerly CFO of Royalty Pharma Mr. Hughes brings >25 years’ experience as both an operator and investor in the biopharmaceutical industry, currently leading XOMA Royalty as CEO Stock Repurchase Plan Announced a $100.0 million Stock Repurchase Plan in March 2026 . It will expire on Dec. 31, 2026 , may be suspended or discontinued at any time, and does not obligate the company to acquire any amount of common stock First Quarter Financial Results The separation of Anaptys and First Tracks Bio was completed on April 20, 2026 . As a result, in the first quarter of 2026, the financial results include assets, liabilities and expenses related to both companies. Beginning in the second quarter of 2026, Anaptys expects to reclassify historical First Tracks Bio related assets, liabilities and expenses as discontinued operations. Cash, cash equivalents and investments totaled $286.5 million as of March 31, 2026 , compared to $311.6 million as of Dec. 31, 2025 , for a decrease of $25.1 million due primarily to operating activities offset by $14.0 million received from stock option exercises. Collaboration revenue was $25.6 million for the three months ended March 31, 2026 , compared to $27.8 million for the three months ended March 31, 2025 . The decrease in revenue was primarily due to $9.7 million in revenue recognized for the Vanda license agreement for the three months ended March 31, 2025 offset by Jemperli royalties increasing 44% from $17.2 million to $24.7 million for the three months ended March 31, 2026 . Research and development expenses were $34.0 million for the three ended March 31, 2026 , compared to $41.2 million for the three months ended March 31, 2025 . The decrease for the three months ended March 31, 2026 was primarily due to decreased development costs for rosnilimab and ANB032 offset by increased costs relating to the phase 1 trials for ANB033. The R&D non-cash, stock-based compensation expense was $4.6 million for the three months ended March 31, 2026 as compared to $4.4 million in the same period in 2025. General and administrative expenses were $26.2 million for the three months ended March 31, 2026 , compared to $14.1 million for the three months ended March 31, 2025 . The increase was due primarily to legal costs for the separation of the company, ongoing GSK litigation and non-cash stock compensation costs incurred for our former Chief Financial Officer and former Chief Legal Officer. The G&A non-cash, stock-based compensation expense was $9.7 million for the three months ended March 31, 2026 as compared to $4.8 million in the same period in 2025. Net loss was $52.9 million for the three months ended March 31, 2026 , or a net loss per share of $1.84 , compared to a net loss of $39.3 million for the three months ended March 31, 2025 , or a net loss per share of $1.28 . About AnaptysBio Anaptys manages the financial collaborations for Jemperli with GSK and imsidolimab with Vanda, with a focus on protecting and returning the value of its royalties to shareholders. To learn more, visit www.AnaptysBio.com or follow us on LinkedIn.Forward-Looking Statements This press release contains forward-looking statements within the meaning of the “safe harbor” provisions of the Private Securities Litigation Reform Act of 1995, including, but not limited to whether Anaptys is able to protect its financial collaborations; and its ability to return value to its shareholders. Statements including words such as “plan,” “continue,” “expect,” or “ongoing” and statements in the future tense are forward-looking statements. These forward-looking statements involve risks and uncertainties, as well as assumptions, which, if they do not fully materialize or prove incorrect, could cause its results to differ materially from those expressed or implied by such forward-looking statements. Forward-looking statements are subject to risks and uncertainties that may cause the company’s actual activities or results to differ significantly from those expressed in any forward-looking statement, including risks and uncertainties related to the company’s ability to protect its financial collaborations and return value to its shareholders, the company’s ability to operate efficiently with a limited staff, and other risks and uncertainties described under the heading “Risk Factors” in documents the company files from time to time with the Securities and Exchange Commission. These forward-looking statements speak only as of the date of this press release, and the company undertakes no obligation to revise or update any forward-looking statements to reflect events or circumstances after the date hereof. This press release also includes a reference to EBIT margin which is a measure not presented in accordance with generally accepted accounting principles in the United States of America (“GAAP”), which Anaptys believes provides important perspective with respect to operational profitability. Non-GAAP financial measures may exclude items that are significant in understanding and assessing Anaptys’ financial results, should not be considered in isolation or as an alternative to GAAP measures, and should be considered only as a supplement to, and not as superior to, GAAP measures. Anaptys cannot predict with certainty the magnitude or scope of certain items that would be included in the most directly comparable GAAP measure to EBIT margin for the relevant future periods, and such items may be significant. Due to these uncertainties, Anaptys cannot provide a quantitative reconciliation of EBIT margin to the most directly comparable GAAP financial measure without unreasonable effort. Investor Contact:Anaptys Investor Relationsinvestors@anaptysbio.com _______________________________________ Source: AnaptysBio, Inc.

First Tracks Biotherapeutics launches with $180 million in cash and two-year cash-runway Trading of TRAX begins on Nasdaq today SAN DIEGO, April 20, 2026 (GLOBE NEWSWIRE) -- First Tracks Biotherapeutics, Inc. (Nasdaq: TRAX) today announced its launch as an independent, publicly traded clinical-stage biotechnology company advancing antibody therapeutics that modulate immune pathways implicated in autoimmune and inflammatory diseases. First Tracks Bio will trade on the Nasdaq Global Select Market, commencing today, under the ticker symbol “TRAX.” “Today marks the official launch of First Tracks Bio and the start of a bold new chapter focused on developing antibodies for autoimmune diseases, including our lead operating program, ANB033, in development to treat celiac disease and eosinophilic esophagitis,” said Daniel Faga, president and chief executive officer. “We’re energized by the patients, physicians, employees and investors who share and are committed to our vision as we advance therapies built to deliver meaningful impact and long‑term value.” First Tracks Bio’s initial three development-stage assets will include ANB033, a CD122 antagonist, in a Phase 1b trial for celiac disease and eosinophilic esophagitis; rosnilimab, a pathogenic T cell depleter, which has completed a Phase 2b trial for rheumatoid arthritis; and ANB101, a BDCA2 modulator, in a Phase 1a trial. The spin-off was completed today following the distribution to AnaptysBio, Inc. shareholders of one share of First Tracks Bio common stock for every one share of Anaptys common stock owned as of the close of business on April 6, 2026, the record date for the distribution. About First Tracks Biotherapeutics First Tracks Biotherapeutics is a clinical stage biotechnology company advancing antibody therapies that modulate immune pathways implicated in autoimmune and inflammatory diseases. Its pipeline includes ANB033, a CD122 antagonist in development for celiac disease and eosinophilic esophagitis; rosnilimab, a pathogenic T cell depleter in development for rheumatoid arthritis; and ANB101, a BDCA2 modulator. To learn more, visit or follow us on LinkedIn . Forward-Looking Statements This press release contains forward-looking statements within the meaning of the “safe harbor” provisions of the Private Securities Litigation Reform Act of 1995, including, but not limited to the projected cash runway for the company. Statements including words such as “plan,” “continue,” “expect,” or “ongoing” and statements in the future tense are forward-looking statements. These forward-looking statements involve risks and uncertainties, as well as assumptions, which, if they do not fully materialize or prove incorrect, could cause its results to differ materially from those expressed or implied by such forward-looking statements. Forward-looking statements are subject to risks and uncertainties that may cause the company’s actual activities or results to differ significantly from those expressed in any forward-looking statement, including risks and uncertainties related to the company’s ability to advance its product candidates, obtain regulatory approval of and ultimately commercialize its product candidates, the timing and results of preclinical and clinical trials, the company’s ability to fund development activities and achieve development goals, the company’s ability to protect intellectual property and other risks and uncertainties described under the heading “Risk Factors” in documents the company files from time to time with the Securities and Exchange Commission. These forward-looking statements speak only as of the date of this press release, and the company undertakes no obligation to revise or update any forward-looking statements to reflect events or circumstances after the date hereof. Investor Contact: Nick Montemarano Executive Director, Investor Relations 858.732.0178 investors@firsttracksbio.com