Kyverna Therapeutics, Inc.

The following discussion and analysis of our financial condition and results of operations should be read in conjunction with the unaudited interim condensed financial statements and related notes included elsewhere in this Quarterly Report on Form 10-Q as well as our audited financial statements and related notes thereto as of and for the year ended December 31, 2025 and the related Management’s Discussion and Analysis of Financial Condition and Results of Operations, both of which are contained in Part II of the Annual Report on Form 10-K for the fiscal year ended December 31, 2025 filed with the Securities and Exchange Commission, or the SEC, on March 26, 2026. This discussion and analysis and other parts of this Quarterly Report on Form 10-Q contain forward-looking statements based upon current beliefs, plans and expectations related to future events and our future financial performance that involve risks, uncertainties and assumptions, such as statements regarding our intentions, plans, objectives and expectations for our business. Our actual results and the timing of selected events could differ materially from those described in or implied by these forward-looking statements as a result of several factors, including those set forth under “Risk Factors” in Part II, Item 1A of this Quarterly Report on Form 10-Q. See also the section below titled “Special Note Regarding Forward-Looking Statements.”

Throughout this Quarterly Report on Form 10-Q, unless the context otherwise requires, the terms “Kyverna,” “we,” “us” and “our” in this Quarterly Report on Form 10-Q refer to Kyverna Therapeutics, Inc.

SPECIAL NOTE REGARDING FORWARD-LOOKING STATEMENTS

This Quarterly Report on Form 10-Q contains forward-looking statements about us and our industry within the meaning of the federal securities laws, which statements involve substantial risks and uncertainties. Forward-looking statements generally relate to future events or our future financial or operating performance. All statements other than statements of historical facts contained in this Quarterly Report on Form 10-Q, including statements regarding our future results of operations and financial position, business strategy, product candidates, planned preclinical studies and clinical trials, results of preclinical studies and clinical trials, research and development plans and costs, plans for manufacturing, regulatory approvals, timing and likelihood of success, as well as plans and objectives of management for future operations, are forward-looking statements. In some cases, you can identify forward-looking statements because they contain words such as “may,” “will,” “should,” “expects,” “plans,” “anticipates,” “could,” “intends,” “target,” “projects,” “contemplates,” “believes,” “estimates,” “predicts,” “potential” or “continue” or the negative of these words or other similar terms or expressions that concern our expectations, strategy, plans or intentions, but the absence of these words does not mean that a statement is not forward-looking. Forward-looking statements contained in this Quarterly Report on Form 10-Q include, for example, but are not limited to, statements about:

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We caution you that the forward-looking statements highlighted above do not encompass all of the forward-looking statements made in this Quarterly Report on Form 10-Q.

We have based the forward-looking statements contained in this Quarterly Report on Form 10-Q primarily on our current expectations and projections about future events and trends that we believe may affect our business, financial condition, results of operations and prospects. The outcome of the events described in these forward-looking statements is subject to risks, uncertainties and other factors described in Part II, Item 1A of this Quarterly Report on Form 10-Q titled “Risk Factors” and elsewhere in this Quarterly Report on Form 10-Q, and involve a number of assumptions and limitations. Moreover, we operate in a very competitive and challenging environment. New risks and uncertainties emerge from time to

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time, and it is not possible for us to predict all risks and uncertainties that could have an impact on the forward-looking statements contained in this Quarterly Report on Form 10-Q. We cannot assure you that the results, events and circumstances reflected in the forward-looking statements will be achieved or occur, and actual results, events or circumstances could differ materially from those described in the forward-looking statements.

The forward-looking statements made in this Quarterly Report on Form 10-Q relate only to events as of the date on which the statements are made. We undertake no obligation to update any forward-looking statements made in this Quarterly Report on Form 10-Q to reflect events or circumstances after the date of this Quarterly Report on Form 10-Q or to reflect new information or the occurrence of unanticipated events, except as required by law. We may not actually achieve the plans, intentions or expectations disclosed in our forward-looking statements and you should not place undue reliance on our forward-looking statements. Our forward-looking statements do not reflect the potential impact of any future acquisitions, mergers, dispositions, joint ventures, other strategic transactions or investments we may make or enter into.

Overview

We are a late-stage clinical biopharmaceutical company focused on developing cell therapies for patients with autoimmune diseases. Our mission is to liberate patients from autoimmune diseases through the curative potential of cell therapy. Our development strategy is supported by our breadth of experience in treating more than 100 autoimmune patients with our lead product candidate, mivocabtagene autoleucel, or miv-cel, also known as KYV-101, an anti-CD19 autologous CAR T with a differentiated CAR construct. This has been documented through the scientific publication of multiple autoimmune case studies, our proprietary dataset of patients treated through named patient forms of compassionate use, our experience in ongoing investigator-initiated trials, or IITs, at leading academic institutions, as well as early clinical data from our ongoing company-sponsored trials illustrating the potential of these therapies to deeply deplete B cells with the aim of achieving durable treatment-free remission. This validation provides us with a clear path to continue advancing miv-cel through late-stage clinical development and commercialization across multiple autoimmune indications.

Miv-cel, our lead program, is an autologous, fully human CD19-targeting CAR T-cell product candidate that is designed for potency and tolerability in autoimmune diseases. Miv-cel is made from an underlying chimeric antigen receptor, or CAR, licensed from the National Institutes of Health, or the NIH. In addition to a fully human scFv domain, the CAR in miv-cel was also designed with a human CD8α hinge and transmembrane domain, a highly potent human CD28 costimulatory domain, and a human CD3ζ activation domain. This same underlying CAR in miv-cel has completed a 20-patient Phase 1 clinical trial in oncology conducted by the NIH, and the results from this Phase 1 clinical trial published in Nature Medicine reported similar rates of durable antitumor responses while delivering improved tolerability in the clinic among adult oncology patients, as compared to the CAR used to create Yescarta®. We believe the unique miv-cel CAR construct has the potential to deliver a differentiated therapeutic profile in autoimmune disease over current standard-of-care therapies by addressing the underlying immune dysfunction – deeply depleting B cells with the goal of achieving an immune reset and durable, treatment-free remission.

We are currently focused on advancing our neuroimmunology CAR T franchise, which includes evaluating miv-cel in stiff person syndrome, or SPS, and generalized myasthenia gravis, or gMG, both serious and highly debilitating autoimmune diseases with significant unmet medical need.

SPS is a rare and progressive neurologic autoimmune disease with no FDA-approved therapies. Patients with SPS have substantial disease burden, with symptoms characterized by muscle stiffness and painful muscle spasms, impacting mobility. 80% of patients lose mobility over time, and need walking aid assistance or a wheelchair. In addition, patients face risk of permanent disability and increased mortality. In SPS, we have completed a registrational 26-patient Phase 2 clinical trial (KYSA-8). We presented the positive primary analysis results from the KYSA-8 trial at the 2026 American Academy of Neurology, or AAN, Annual Meeting in April 2026. In the trial, miv-cel demonstrated statistically significant, durable clinical benefit across all primary and secondary endpoints at 16 weeks, with reversal of disability scores following a single dose of miv-cel. 100% of patients remained free of immunotherapies for SPS as of week 16. Further, miv-cel demonstrated a well-tolerated safety profile. We also presented outcomes from a large, multicenter, retrospective natural history study examining the impact of SPS on walking speed at AAN. We had a positive pre-BLA meeting with the FDA and gained alignment on our regulatory path for miv-cel in SPS, including a rolling BLA submission and all core components of the BLA package. In May 2026, we initiated the rolling BLA submission, seeking priority review under the program's Regenerative Medicine Advanced therapy (RMAT) designation, and anticipate completing the submission in the fourth quarter of 2026.

Myasthenia gravis, or MG, is a B-cell and antibody-mediated neuromuscular autoimmune disease that causes fluctuating muscle weakness and fatigue. The disease includes gMG, which impacts muscles beyond the eyes and may involve bulbar, limb, and respiratory muscles. Most patients develop gMG within two years after MG diagnosis. Symptoms are highly disruptive to quality of life and can include muscle weakness and fatigue, difficulty chewing and swallowing,

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trouble with speech, and in severe cases, respiratory failure, which can be life-threatening. Despite available treatment options, including immunosuppressants and biologics, patients still struggle with symptom control and require chronic and costly treatment options in addition to background therapies.

In October 2025, we reported positive interim data from our registrational KYSA-6 (KYSA-6) Phase 2 clinical trial of miv-cel in gMG. In April 2026, we presented the positive longer-term follow-up data from the Phase 2 portion of the KYSA-6 trial at the 2026 AAN Annual Meeting. The updated data demonstrated durable clinical responses across all key clinical outcome measures with sustained benefit observed out to one year following a single dose of miv-cel. 100% of patients achieved clinically meaningful, rapid and robust reductions in Myasthenia Gravis Activities of Daily Living, or MG-ADL, and Quantitative Myasthenia Gravis, or QMG, scores from baseline (the co-primary endpoints of the Phase 3 portion of the trial), regardless of prior biologic exposure and at deeper levels observed compared to prior interim analysis. In addition, biomarker and mechanistic data further supported miv-cel’s differentiated clinical profile and miv-cel was well-tolerated. We began enrolling patients for our FDA-aligned, Phase 3 registrational trial in December 2025 and continue to enroll patients across 15 activated sites globally.

We previously received Regenerative Medicine Advanced Therapy, or RMAT, designations and Orphan Drug Designations, or ODD, from the FDA for both SPS and MG as well as Orphan Drug Designation from the European Medicines Association in MG. Through these designations, we continue to engage in consistent dialogue with the FDA across both programs.

We are also strengthening our chemistry, manufacturing, and controls, or CMC, capabilities to support late-stage clinical development and anticipated commercialization. We have FDA-alignment on our CMC strategy and believe our manufacturing partnerships and ongoing process innovations position us to support both near-term commercial launch and longer-term pipeline growth.

Beyond SPS and gMG, our pipeline opportunities include expanding into other autoimmune indications as well as novel innovations to expand patient access.

We are harnessing IITs and other Kyverna-sponsored clinical trials, or KYSA trials, including in progressive multiple sclerosis, or progressive MS, rheumatoid arthritis, or RA, lupus nephritis, or LN, and systemic sclerosis, or SSc, to inform our next priority indications to advance into late-stage development. In 2025, we shared encouraging data from a Phase 1 IIT in MS and a Phase 1/2 IIT in RA. In February 2026, the positive updated data of miv-cel in progressive multiple sclerosis from a Phase 1 IIT was presented at the Americas Committee for Treatment and Research in Multiple Sclerosis (ACTRIMS) forum.

As part of our longer-term efforts to broaden patient access, we are exploring alternative lymphodepletion, or LD, and no LD regimens for miv-cel in addition to the potential for outpatient administration given miv-cel’s favorable safety profile. Additionally, our pipeline includes next-generation CAR T-cell technologies in order to efficiently expand into broader autoimmune indications and increase patient reach.

In January 2026, the Investigational New Drug, or IND, application for KYV-102, our proprietary whole blood, rapid manufacturing process, was accepted by the U.S. FDA.

Since our inception in June 2018, we have devoted substantially all of our resources to performing research and development, enabling manufacturing activities in support of our product development efforts, hiring personnel, acquiring and developing our technology and product candidates, performing business planning, developing and establishing our intellectual property portfolio, raising capital and providing general and administrative support for these activities. We do not have any products approved for sale and have not generated any revenue from product sales.

We have incurred significant losses and negative cash flows from operations since our inception. We have funded our operations primarily from sales of our redeemable convertible preferred stock, issuances of convertible notes, revenue from our collaboration agreement with Gilead Sciences, Inc., or Gilead, which terminated effective as of January 22, 2024; from the sale of shares of our common stock in our initial public offering in February 2024, or the IPO, through our ATM Facility (as defined below) and other underwritten public offerings; and cash received from our Loan Facility (as defined below) entered in October 2025. Our net loss was $39.7 million for the three months ended March 31, 2026, compared with $44.6 million net loss for the three months ended March 31, 2025. As of March 31, 2026, we had an accumulated deficit of $464.6 million. Management has determined that our cash and cash equivalents and available-for-sale marketable securities of $236.4 million as of March 31, 2026 will be sufficient to fund our planned operations for at least one year from the date of this Quarterly Report on Form 10-Q. We plan to monitor expenses and raise additional capital through equity or debt financings, strategic alliances and licensing arrangements. Our ability to access capital when needed is not assured and if capital is not available to us when, and in the amounts, needed, we could be required to delay, scale back or abandon some or

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all of our development programs and other operations, which could materially harm our business, financial condition and results of operations.

We expect to continue to incur substantial losses for the foreseeable future, and our transition to profitability will depend upon the successful development, approval and commercialization of our product candidates and upon the receipt of sufficient revenues to support our cost structure. We do not expect to generate any revenue from commercial product sales unless and until we successfully complete development and obtain regulatory approval for one or more of our product candidates. We may never achieve profitability, and unless we do and until then, we will need to continue to raise additional capital.

We expect our expenses will increase substantially in connection with our ongoing and planned activities, as we:

We do not currently own or operate any manufacturing facilities. We rely on contract manufacturing organizations, or CMOs, to produce our product candidates in accordance with the FDA’s current Good Manufacturing Practices regulations for use in our clinical studies. Under the July 2023 development and manufacturing services agreement, or the Elevate Agreement, with ElevateBio BaseCamp, Inc., or Elevate, Elevate provides us with cell manufacturing, release and testing services for our miv-cel product candidate.

Under the master services agreement with Minaris Advanced Therapies, Inc., or MAT, MAT’s facility in Philadelphia, Pennsylvania, provides us with certain customized cell manufacturing, release and testing services for our miv-cel product candidate. Pursuant to our license and supply agreement with Oxford Biomedica (UK) Limited, or Oxford, Oxford provides us with lentiviral vector process development services.

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Our pipeline and programs

Our portfolio of product candidates for the treatment of autoimmune diseases is summarized in the figure below:

Fast Track Designation, or FTD, does not ensure that we will experience a faster development process, regulatory review or regulatory approval process compared to conventional FDA procedures. *Phase 3 may not be required if Phase 2 is registrational.

†EU & US. ‡ Kyverna is also exploring miv-cel in progressive MS through IITs.

Given our stage of development, we have not yet established a marketing or sales organization or commercial infrastructure. Accordingly, if we obtain regulatory approval for any of our product candidates, we also expect to incur significant commercialization expenses related to product sales, marketing, manufacturing and distribution.

Because of the numerous risks and uncertainties associated with product development, we are unable to predict the timing or amount of increased expenses or when or if we will be able to achieve or maintain profitability, if at all. Even if we are able to generate revenue from the sale of our product candidates, we may not become profitable. If we fail to become profitable or are unable to sustain profitability on a continuing basis, we may be unable to continue our operations at planned levels and may be forced to reduce our operations.

License and Collaboration Agreements

Information regarding our license and collaboration agreements is included in Note 6, “License and Collaboration Agreements,” to the condensed financial statements included in this Quarterly Report on Form 10-Q.

Macroeconomic Trends

We may be affected by worldwide economic conditions and challenges, such as the effects of the ongoing geopolitical conflicts in Ukraine, war in Iran and other conflicts and instability in the Middle East, instability in Venezuela, tensions between not only the U.S. and China, but also between the U.S. and other countries in the international community, disruptions in the banking industry and inflationary trends, and the imposition, or threatened imposition, of tariffs and potential retaliatory trade restrictions. The past several years have been marked by significant market uncertainty and increasing inflationary pressures. These market dynamics continue and similar adverse market conditions may negatively impact our business, financial position and results of operations. For further discussion of the potential impacts of macroeconomic events on us, refer to the section titled “Risk Factors” in Part II, Item 1A of this Quarterly Report on Form 10-Q.

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Components of Operating Results

Operating Expenses

Our operating expenses consist of (i) research and development expenses and (ii) general and administrative expenses.

Research and Development Expenses

The largest component of our total operating expenses since inception has been research and development activities, including the preclinical and clinical development of our product candidates. Research and development expenses consist primarily of compensation and benefits for research and development employees, including stock-based compensation; expenses incurred under agreements with clinical research organizations, or CROs, and investigative sites that conduct preclinical and clinical studies; costs of acquiring and manufacturing clinical study materials and other supplies; payments under licensing and research and development agreements; other outside services and consulting costs; and facilities, information technology and overhead expenses. Research and development costs are expensed as incurred.

Research and development costs include:

We expect our research and development expenses to increase substantially for the foreseeable future as we advance our product candidates into and through preclinical studies and clinical trials, pursue regulatory approval of our product candidates and expand our pipeline of product candidates. The process of conducting the necessary preclinical and clinical research to obtain regulatory approval is costly and time-consuming. The actual probability of success for our product candidates may be affected by a variety of factors, including the safety and efficacy of our product candidates, early clinical data, investment in our clinical programs, competition, manufacturing capability and commercial viability. We may never receive regulatory approval for any of our product candidates. As a result of the uncertainties discussed above, we are unable to determine the duration and completion costs of our research and development projects or if, when and to what extent we will generate revenue from the commercialization and sale of our product candidates, if approved.

General and Administrative Expenses

General and administrative expenses consist primarily of payroll and personnel-related expenses, including: salaries, employee benefit costs and stock-based compensation expense; professional fees for legal, consulting, accounting and tax services; allocated overheads, including rent, equipment, information technology costs and utilities; and other general operating expenses not otherwise classified as research and development expenses.

Our general and administrative expenses have increased, and are expected to continue to increase primarily due to increased personnel costs, including salaries, benefits and stock-based compensation expense, expanded infrastructure and increased consulting and professional services associated with maintaining compliance with stock exchange listing and requirements of the SEC, investor relations costs and director and officer insurance premiums.

Interest Income

Interest income consists primarily of interest and accretion of premiums and discounts on our investments in available-for-sale marketable securities and cash equivalents.

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Interest Expense

Interest expense consists primarily of interest expense related to our Loan Facility and laboratory equipment finance leases. The Loan Facility interest expense was $0.6 million for the three months ended March 31, 2026 and we expect that it will increase in the future as we will incur interest on the outstanding borrowings under the Loan Facility.

Other Expense, Net

Other expense, net primarily consists of settlement and revaluation of transactions and accounts payable in foreign currency.

Results of Operations

Comparison of the Three Months Ended March 31, 2026 and 2025

The following table summarizes our results of operations for the periods presented:

Research and Development Expenses

The following table summarizes our research and development expenses for the periods presented:

Research and development expenses decreased by $7.4 million, or 20%, from $37.4 million for the three months ended March 31, 2025 to $30.1 million for the three months ended March 31, 2026.