SEL-212

Presented positive topline results from Phase 2b trial of Descartes-08 in patients with myasthenia gravis; End-of-Phase 2 meeting with FDA expected by year-end Dosed first SLE patient in Phase 2 trial of Descartes-08 IND filing for pediatric basket study of Descartes-08 with focus in neurology and rheumatology expected by year-end PIPE financing strengthened balance sheet, with net proceeds expected to support development of Descartes-08 in MG through planned Phase 3 trial GAITHERSBURG, Md., Aug. 08, 2024 (GLOBE NEWSWIRE) -- Cartesian Therapeutics, Inc. (NASDAQ: RNAC) (the “Company”), a clinical-stage biotechnology company pioneering mRNA cell therapy for autoimmune diseases, today reported financial results for the second quarter of 2024, and provided recent business and corporate updates. “Last quarter marked a pivotal milestone in Cartesian’s history as we demonstrated clinical differentiation of our novel mRNA platform,” said Carsten Brunn, Ph.D., President and Chief Executive Officer of Cartesian. “MG patients treated with Descartes-08 were observed to have deep and durable responses, supporting the potential breadth and application of Cartesian’s approach to treating autoimmune diseases. Additionally, we raised approximately $130 million from both new and existing investors to help us execute the planned Phase 3 trial of Descartes-08 in MG. We look forward to continuing our strong momentum, meeting with the FDA before year-end and initiating a Phase 3 clinical trial in MG, filing an IND for a pediatric basket study, and expanding our pipeline to address new disease indications.” Recent Pipeline Progress and Anticipated Milestones Descartes-08 for Myasthenia Gravis (MG) In July 2024, the Company presented positive topline results from its Phase 2b trial of Descartes-08 in patients with generalized MG. The trial achieved its primary endpoint with statistical significance in the pre-specified modified intent-to-treat efficacy population, with 71% (10/14) of patients treated with Descartes-08 observed to have 5-point or greater improvements in MG Composite (MGC) score at Month 3 compared to 25% (3/12) of patients treated with placebo (p=0.018).Responders that reached their four-month and six-month assessments were observed to have deep, durable, and clinically meaningful improvements in their MGC severity scores.Descartes-08 was observed to have a favorable safety profile supporting outpatient administration without the need for lymphodepleting chemotherapy. The Company expects to hold an End-of-Phase 2 meeting with the U.S. Food and Drug Administration (FDA) by year-end 2024 to review data from the Phase 2b trial and discuss plans for initiating a Phase 3 clinical trial of Descartes-08 in MG. Descartes-08 was previously granted Regenerative Medicine Advanced Therapy (RMAT) Designation, which allows for more frequent regulatory engagement, and Orphan Drug Designation by the FDA for the treatment of MG.Descartes-08, the Company’s lead product candidate, is an autologous anti-B cell maturation antigen (BCMA) mRNA-engineered chimeric antigen receptor T-cell therapy (mRNA CAR-T). Descartes-08 for Systemic Lupus Erythematosus (SLE) In July 2024, the Company announced dosing of the first patient in a Phase 2 clinical trial.The trial is designed to assess the safety, tolerability and clinical activity of outpatient Descartes-08 administration without preconditioning chemotherapy in patients with SLE.The Company believes that the mechanism of action of Descartes-08, which targets both plasma cells and plasmacytoid dendritic cells, could lead to clinical benefit in patients with SLE.SLE is an incurable autoimmune disease marked by systemic inflammation that affects multiple organ systems and impacts approximately 1.5 million people in the United States. Descartes-08 for Pediatric Autoimmune Diseases Cartesian plans to file an Investigational New Drug (IND) application for Descartes-08 in pediatric autoimmune disease indications by year-end 2024.The planned basket trial will focus on certain pediatric neurological and rheumatological autoimmune diseases that have high unmet medical need.To date, Descartes-08 has been observed to have a favorable safety profile in adult patients treated in an outpatient setting without lymphodepleting chemotherapy, which the Company believes could be a key differentiator for treating pediatric patients. Descartes-15 for Autoimmune Diseases The Company expects to dose the first patient in its planned Phase 1 trial of Descartes-15 in the second half of 2024.The Phase 1 dose escalation trial will assess the safety and tolerability of outpatient Descartes-15 administration in patients with multiple myeloma. Following the Phase 1 dose escalation trial, the Company expects to subsequently assess Descartes-15 in autoimmune indications.Descartes-15 is a next-generation autologous anti-BCMA mRNA CAR-T product candidate designed to have predictable and controllable pharmacokinetics, including technological advances that enhance CAR stability even in the presence of target-driven suppression of CAR.Similar to Descartes-08, Descartes-15 is designed to be administered without preconditioning chemotherapy and eliminate integrating vectors.Relative to Descartes-08, Descartes-15 has been observed to achieve an approximately ten-fold increase in CAR expression and selective target-specific killing in preclinical studies. Corporate Updates Completed $130 Million Private Placement Equity Financing In July 2024, Cartesian announced a private investment in public equity (PIPE) financing, which included participation from both new and existing investors, resulting in gross proceeds of approximately $130.0 million.The Company intends to use the net proceeds from the PIPE financing, together with the Company’s existing cash, cash equivalents, and restricted cash, to continue development of Descartes-08 in MG, specifically supporting anticipated manufacturing costs associated with a Phase 3 clinical trial and early commercial activities in preparation for a potential launch, if approved.Additionally, Cartesian expects to use the net proceeds to advance and expand its autoimmune pipeline through continued development of Descartes-08 for SLE, Descartes-15 for autoimmune diseases, and prepare for a planned basket trial for autoimmune pediatric indications.Operationally, the Company expects to continue making enhancements to its process development and manufacturing capabilities to improve production yields. Strengthened Board of Directors with Appointment of Kemal Malik In July 2024, the Company announced the appointment of Kemal Malik, MBBS to its Board of Directors.Dr. Malik’s appointment provides regulatory and clinical expertise and deepens the Company’s strategic leadership. He has over 30 years of global development, regulatory, and commercial experience at leading pharmaceutical organizations. Second Quarter 2024 Financial Results Cash, cash equivalents, and restricted cash were approximately $88.9 million as of June 30, 2024. In conjunction with net proceeds from the $130.0 million PIPE financing announced in July 2024, the Company’s cash, cash equivalents, and restricted cash as of June 30, 2024 are expected to support development of Descartes-08 in MG, specifically supporting anticipated manufacturing costs associated with a Phase 3 clinical trial and early commercial activities in preparation for a potential launch, and help support the advancement and expansion of its autoimmune pipeline, including Descartes-08 for SLE, other potential indications, and enhancements to its process development and manufacturing capabilities.Research and development expenses were $12.7 million for the quarter ended June 30, 2024, compared to $17.8 million for the quarter ended June 30, 2023. The decrease in research and development expenses of $5.1 million for the quarter ended June 30, 2024 was due to a one-time cash charge to salaries and benefits as a result of headcount reduction in April 2023 and decreased contract license and milestone payments.General and administrative expenses were $7.0 million for the quarter ended June 30, 2024, compared to $6.1 million for the quarter ended June 30, 2023. The increase in general and administrative expenses of $0.9 million for the quarter ended June 30, 2024 was primarily due to personnel expenses.Net income was $13.8 million, or basic net income per share allocable to common stockholders of $0.58, for the quarter ended June 30, 2024, compared to net loss of $(11.4) million, or basic net loss per share allocable to common stockholders of $(2.23), for the quarter ended June 30, 2023. The net income includes recognition of revenue for a $30.0 million milestone fee, which was triggered by the initiation of a Biologics License Applications filing for SEL-212 by Swedish Orphan Biovitrum AB (Sobi). The milestone payment is expected to be paid out to Contingent Value Rights (CVR) holders in March 2025 net of deductions specified in the CVR Agreement. About Descartes-08 Descartes-08, Cartesian’s lead mRNA cell therapy candidate and a potential first-in-class mRNA-engineered chimeric antigen receptor T-cell therapy (mRNA CAR-T), is an autologous mRNA CAR-T product targeting B-cell maturation antigen (BCMA) in clinical development for generalized myasthenia gravis (MG) and systemic lupus erythematosus. In contrast to conventional DNA-based CAR T-cell therapies, mRNA CAR-T administration does not require preconditioning chemotherapy, can be administered in the outpatient setting, and does not carry the risk of genomic integration associated with cancerous transformation. Descartes-08 has been granted Orphan Drug Designation and Regenerative Medicine Advanced Therapy Designation by the U.S. Food and Drug Administration for the treatment of MG. About Cartesian Therapeutics Cartesian Therapeutics is a clinical-stage company pioneering mRNA cell therapies for the treatment of autoimmune diseases. The Company’s lead asset, Descartes-08, is a potential first-in-class mRNA CAR-T in Phase 2b clinical development for patients with generalized myasthenia gravis and Phase 2 development for systematic lupus erythematosus, with a Phase 2 basket trial planned in additional autoimmune indications. The Company’s clinical-stage pipeline also includes Descartes-15, a next-generation, autologous anti-BCMA mRNA CAR-T. For more information, please visit www.cartesiantherapeutics.com or follow the Company on LinkedIn or X, formerly known as Twitter. Forward Looking Statements Any statements in this press release about the future expectations, plans and prospects of the Company, including without limitation, statements regarding the Company’s expectation to hold an End-of-Phase 2 meeting with the FDA by the end of 2024, the ability of Descartes-08 to be administered in an outpatient setting or without the need for preconditioning lymphodepleting chemotherapy, the Company’s in-house manufacturing capabilities, the potential of the Company’s technology to enable precision control and optimization of engineered cells for diverse cell therapies leveraging multiple modalities, the potential of Descartes-08, Descartes-15, or any of the Company’s other product candidates to treat myasthenia gravis, systemic lupus erythematosus, or any other disease, the amount and occurrence of any payments to holders of the Company’s contingent value rights, the anticipated timing or the outcome of ongoing and planned clinical trials, studies and data readouts, the anticipated timing or the outcome of the FDA’s review of the Company’s regulatory filings, the Company’s ability to conduct its clinical trials and preclinical studies, the timing or making of any regulatory filings, the anticipated timing or outcome of selection of developmental product candidates, the ability of the Company to consummate any expected agreements and licenses and to realize the anticipated benefits thereof, the novelty of treatment paradigms that the Company is able to develop, the potential of any therapies developed by the Company to fulfill unmet medical needs, and enrollment in the Company’s clinical trials and other statements containing the words “anticipate,” “believe,” “continue,” “could,” “estimate,” “expect,” “hypothesize,” “intend,” “may,” “plan,” “potential,” “predict,” “project,” “should,” “target,” “would,” and similar expressions, constitute forward-looking statements within the meaning of The Private Securities Litigation Reform Act of 1995. Actual results may differ materially from those indicated by such forward-looking statements as a result of various important factors, including, but not limited to, the following: the uncertainties inherent in the initiation, completion and cost of clinical trials including proof of concept trials, including uncertain outcomes, the availability and timing of data from ongoing and future clinical trials and the results of such trials, whether preliminary results from a particular clinical trial will be predictive of the final results of that trial and whether results of early clinical trials will be indicative of the results of later clinical trials, the ability to predict results of studies performed on human beings based on results of studies performed on non-human subjects, the unproven approach of the Company’s technology, potential delays in enrollment of patients, undesirable side effects of the Company’s product candidates, its reliance on third parties to conduct its clinical trials, the Company’s inability to maintain its existing or future collaborations, licenses or contractual relationships, its inability to protect its proprietary technology and intellectual property, potential delays in regulatory approvals, the availability of funding sufficient for its foreseeable and unforeseeable operating expenses and capital expenditure requirements, the Company’s recurring losses from operations and negative cash flows, substantial fluctuation in the price of the Company’s common stock, risks related to geopolitical conflicts and pandemics and other important factors discussed in the “Risk Factors” section of the Company’s most recent Annual Report on Form 10-K and subsequently filed Quarterly Reports on Form 10-Q, and in other filings that the Company makes with the Securities and Exchange Commission. In addition, any forward-looking statements included in this press release represent the Company’s views only as of the date of its publication and should not be relied upon as representing its views as of any subsequent date. The Company specifically disclaims any intention to update any forward-looking statements included in this press release, except as required by law. Cartesian Therapeutics, Inc. and SubsidiariesConsolidated Balance Sheets(Amounts in thousands, except share data and par value) June 30, 2024 December 31, 2023 (Unaudited) Assets Current assets: Cash and cash equivalents$87,227 $76,911Accounts receivable 32,039 5,870Unbilled receivables 3,472 2,981Prepaid expenses and other current assets 2,044 4,967Total current assets 124,782 90,729Non-current assets: Property and equipment, net 6,672 2,113Right-of-use asset, net 13,852 10,068In-process research and development assets 150,600 150,600Goodwill 48,163 48,163Long-term restricted cash 1,669 1,377Investments 2,000 2,000Total assets$347,738 $305,050Liabilities, convertible preferred stock, and stockholders’ deficit Current liabilities: Accounts payable$2,862 $3,150Accrued expenses and other current liabilities 10,954 15,572Lease liability 2,523 2,166Deferred revenue — 2,311Warrant liabilities 1,205 720Contingent value right liability 8,571 15,983Forward contract liabilities — 28,307Total current liabilities 26,115 68,209Non-current liabilities: Lease liability, net of current portion 12,344 8,789Deferred revenue, net of current portion — 3,538Warrant liabilities, net of current portion 8,055 5,674Contingent value right liability, net of current portion 386,829 342,617Deferred tax liabilities, net 15,853 15,853Total liabilities 449,196 444,680Series A Preferred Stock, $0.0001 par value; no and 548,375 shares authorized as of June 30, 2024 and December 31, 2023, respectively; no and 435,120.513 shares issued and outstanding as of June 30, 2024 and December 31, 2023, respectively — 296,851Options for Series A Preferred Stock — 3,703Stockholders’ deficit: Series A Preferred Stock, $0.0001 par value; 180,455.753 and no shares authorized as of June 30, 2024 and December 31, 2023, respectively; 166,341.592 and no shares issued and outstanding as of June 30, 2024 and December 31, 2023, respectively — —Preferred stock, $0.0001 par value; 9,819,544.247 and 9,451,625 shares authorized as of June 30, 2024 and December 31, 2023, respectively; no shares issued and outstanding as of June 30, 2024 and December 31, 2023 — —Common stock, $0.0001 par value; 350,000,000 shares authorized as of June 30, 2024 and December 31, 2023; 17,816,238 and 5,397,597 shares issued and outstanding as of June 30, 2024 and December 31, 2023, respectively 2 1Additional paid-in capital 560,766 179,062Accumulated deficit (657,635) (614,647)Accumulated other comprehensive loss (4,591) (4,600)Total stockholders’ deficit (101,458) (440,184)Total liabilities, convertible preferred stock, and stockholders’ deficit$347,738 $305,050 Cartesian Therapeutics, Inc. and SubsidiariesConsolidated Statements of Operations and Comprehensive Income (Loss)(Amounts in thousands, except share and per share data) Three Months EndedJune 30, Six Months EndedJune 30, 2024 2023 2024 2023 (Unaudited) Revenue: Collaboration and license revenue$33,271 $5,249 $39,111 $11,187 Grant revenue 174 — 174 — Total revenue 33,445 5,249 39,285 11,187 Operating expenses: Research and development 12,661 17,782 22,399 36,406 General and administrative 7,027 6,105 16,477 11,800 Total operating expenses 19,688 23,887 38,876 48,206 Operating income (loss) 13,757 (18,638) 409 (37,019)Investment income 1,195 1,394 2,359 2,725 Foreign currency transaction, net — 23 — 42 Interest expense — (752) — (1,560)Change in fair value of warrant liabilities (3,908) 6,341 (2,866) 2,262 Change in fair value of contingent value right liability 2,500 — (36,800) — Change in fair value of forward contract liabilities — — (6,890) — Other income, net 292 245 800 500 Net income (loss)$13,836 $(11,387) $(42,988) $(33,050) Other comprehensive income (loss): Foreign currency translation adjustment 14 (27) 9 (49)Unrealized gain on marketable securities — — — 11 Total comprehensive income (loss)$13,850 $(11,414) $(42,979) $(33,088) Net income (loss) per share allocable to common stockholders: Basic$0.58 $(2.23) $(3.88) $(6.46)Diluted$0.54 $(2.23) $(3.88) $(6.46)Weighted-average common shares outstanding: Basic 16,723,479 5,114,747 11,068,749 5,113,213 Diluted 17,791,143 5,114,747 11,068,749 5,113,213 Investor ContactRon MoldaverSenior Director, Investor Relations & Business Developmentron.moldaver@cartesiantx.com Media ContactDavid RosenArgot Partnersdavid.rosen@argotpartners.com

The new funding will be used to take ProGly-Uricase into a phase 1 trial of patients with elevated uric acid levels. GRO Biosciences has ended the week with an extra $60.3 million in the bank, which the protein therapeutics-focused biotech will use to push its lead gout treatment into clinical trials. Gout occurs when high levels of uric acid in the blood cause crystals to form and accumulate in and around a joint, leading to pain and swelling. Horizon Therapeutics’ Krystexxa remains the only approved biologic to treat uncontrolled gout. But some patients who receive this uricase enzyme therapy soon develop anti-drug antibodies (ADAs) that clear out the enzyme, according to GRO Bio. GRO Bio’s pitch is that its own uricase enzyme therapy, ProGly-Uricase, can prevent the emergence of ADAs, allowing patients to keep control of their serum uric acid levels for the long term. The new funding will be used to take ProGly-Uricase into a phase 1 trial of patients with elevated uric acid levels, as well as to “broaden the GRObio pipeline, and to expand its genomically recoded organism (GRO) platform for scalable production of therapeutics,” per the company. The series B was co-led by new investors Atlas Venture and Access Biotechnology, the biopharma investment arm of Access Industries. Atlas partner Kevin Bitterman, Ph.D., and Access Biotechnology’s Managing Director Dan Becker, M.D., Ph.D., both joined GRO Bio’s board as part of the financing arrangements. Previous investors Redmile Group, Digitalis Ventures and Innovation Endeavors were also back for the series B, along with Leaps by Bayer, which led GRO Bio’s $25 million series A in 2021. Altogether, GRO Bio has now raised over $90 million in capital to date, the biotech pointed out. The Cambridge, Massachusetts-based company, which aims to “leverage synthetic biology to expand the amino acid alphabet,” also has plans to use its tech to treat autoimmune diseases without broadly suppressing the immune system by conferring highly specific tolerance to disease-causing autoantigens. “Having proved our therapeutic approach preclinically and demonstrated scalability of our GRO platform, we have assembled the ideal team to advance GRObio to a clinical-stage company,” CEO Dan Mandell, Ph.D., said in the release. “This financing enables us to acquire valuable clinical efficacy data in gout while expanding our platform to demonstrate the first scalable production of proteins with multiple NSAAs, including simultaneous incorporation of drug, immune recruitment, and tissue-targeting payloads,” Mandell added. GRO Bio isn't the only company looking to take on Krystexxa's crown. For example, Selecta Biosciences and Sobi produced phase 3 data last year that suggested their SEL-212 candidate ImmTOR can match the efficacy of Horizon's mainstay, despite being administered less frequently.