FDA grants RMAT designation for miv-cel in non-active secondary progressive multiple sclerosis (naSPMS) based on compelling clinical data, further expanding the therapy's potential across neuroimmunology

On track to complete rolling BLA submission for miv-cel in stiff person syndrome (SPS) in Q4 2026; KYSA-8 12-month topline data expected in Q3 2026

Enrollment in KYSA-6 Phase 3 trial in generalized myasthenia gravis (gMG) expected to be completed in mid-2027; longer-term follow-up Phase 2 topline data expected in Q3 2026

Reiterates operating runway into 2028

EMERYVILLE, Calif., Aug. 11, 2026 (GLOBE NEWSWIRE) -- Kyverna Therapeutics, Inc. (Nasdaq: KYTX), a late-stage clinical immunology company pioneering transformative therapies for people with neurologic autoimmune diseases, today reported financial results for the second quarter ended June 30, 2026, and provided a business update.

"Kyverna continues to advance our rolling BLA submission for stiff person syndrome, progress commercial launch readiness activities and accelerate enrollment in our registrational trial in generalized myasthenia gravis, while advancing our pipeline," said Warner Biddle, Chief Executive Officer of Kyverna Therapeutics. "With three RMAT indications and the potential to deliver the first approved CAR T-cell therapy for autoimmune diseases, we are well positioned to achieve our goal of freeing patients from life-long disease burden and chronic immunotherapies with a single dose of miv-cel."

Progress in Miv-cel Neuroimmunology Franchise

   -- SPS Rolling Biologic License Application (BLA) Submission Underway and 
      Commercial Readiness Activities On-Track: 
 
          -- Kyverna has initiated its rolling BLA, submitted the Chemistry, 
             Manufacturing and Controls $(CMC)$ module and is on track to 
             complete its submission in the fourth quarter of 2026. 
 
          -- The Company plans to seek priority review, under the Regenerative 
             Medicine Advanced therapy (RMAT) designation, positioning miv-cel 
             for potential commercial launch in 2027. 
 
          -- Kyverna continues to advance activities to enable a successful 
             rare disease launch in SPS upon approval. These efforts include 
             hiring key commercial leadership roles, commercial site activation, 
             a commercial supply agreement, payer and patient advocacy 
             engagement, and healthcare professional education. 
 
          -- The Company plans to report 12-month topline data from KYSA-8 in 
             Q3 2026. 
 
   -- Enrollment Ongoing in KYSA-6 Registrational Trial for gMG: 
 
          -- Kyverna continues to advance its Phase 3 gMG trial and expects to 
             complete enrollment by mid-2027. The Company anticipates sharing 
             longer-term follow-up Phase 2 topline data in Q3 2026. 
   -- Advancing Progressive Multiple Sclerosis (PMS) Strategy with RMAT 
      Designation Granted for Miv-cel for Treatment of Non-active Secondary 
      Progressive Multiple Sclerosis: 
 
          -- RMAT designation has been granted for miv-cel in naSPMS by the FDA 
             based on compelling clinical data from investigator-initiated 
             trials (IIT) at Stanford University and the University of 
             California, San Francisco in patients with PMS. This designation 
             provides the opportunity for increased FDA engagement and 
             eligibility for priority and rolling reviews, as well as 
             accelerated approval pathways, with the goal of bringing 
             transformative innovations to patients more quickly. 
 
          -- Kyverna expects to provide an update on its PMS development 
             strategy by early 2027, as well as additional data from the 
             Stanford Phase 1 IIT in Q4 2026. 

"In progressive multiple sclerosis, miv-cel's potential to stabilize or improve disability status with a single dose could represent a transformative treatment advance given the steady progression patients face despite available therapies. We look forward to sharing our development strategy in progressive multiple sclerosis, leveraging discussions with the FDA through our RMAT designation, by early 2027," said Naji Gehchan, Chief Medical and Development Officer of Kyverna.

   -- Additional Miv-cel Neuroimmunology Franchise Opportunities 
 
          -- Kyverna continues to explore miv-cel with alternative or no 
             preconditioning regimens and the potential for outpatient 
             administration supported by miv-cel's consistent and 
             well-tolerated safety profile. 

Leadership Appointments

   -- In the second quarter, Kyverna strengthened its leadership team with the 
      appointments of Greg Martini as Chief Financial Officer, Nadia Dac as 
      Chief Commercial Officer, and Ritesh Srivastava as Chief Legal and 
      Compliance Officer. 

Financial Results for the Second Quarter Ended June 30, 2026

   -- Kyverna reported $199.4 million in cash, cash equivalents, and marketable 
      securities as of June 30, 2026, which in addition to amounts available 
      for draw from the Oxford Finance amended loan facility, is expected to 
      provide operating runway into 2028. 
 
   -- Research and Development (R&D) expenses were $24.8 million for the second 
      quarter ended June 30, 2026. 
 
   -- General and Administrative (G&A) expenses were $14.8 million for the 
      second quarter ended June 30, 2026. 
 
   -- For the quarter ended June 30, 2026, the Company reported a net loss of 
      $38.3 million, or a net loss per common share of $0.63. 

About Miv-cel (mivocabtagene autoleucel, KYV-101)

Miv-cel is a fully human, autologous, CD19-targeting CAR T-cell therapy with CD28 co-stimulation, uniquely designed for potency and tolerability, which is under investigation for B-cell-driven autoimmune diseases. With a single administration, miv-cel has potential to achieve deep B-cell depletion and immune system reset to deliver durable, drug-free, disease-free remission in autoimmune diseases.

About Kyverna Therapeutics

Kyverna Therapeutics, Inc. (Nasdaq: KYTX) is a late-stage clinical immunology company pioneering differentiated therapies with curative potential for neurologic autoimmune diseases. Kyverna's lead autologous CD19-targeting CAR T-cell therapy candidate, miv-cel (mivocabtagene autoleucel, KYV-101), has demonstrated the potential to fundamentally change the treatment paradigm across multiple B-cell-driven autoimmune diseases. Kyverna is advancing its potentially first-in-class neuroimmunology franchise with its recently completed registrational trial in stiff person syndrome and an ongoing registrational trial for generalized myasthenia gravis. The Company is also harnessing other KYSA trials and investigator-initiated trials, as well as next generation innovations to expand patient access and evaluate future indications. For more information, please visit https://kyvernatx.com.

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, without limitation, "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 or similar identifying words. Forward-looking statements in this press release include, without limitation, those related to: Kyverna's goal of freeing patients from life-long disease burden and chronic immunotherapies with a single dose of miv-cel; Kyverna's regulatory path for SPS, including the rolling BLA submission for SPS and the expected timing for completing such submission, as well as potential for priority review under an RMAT designation or any potential first-in-class approval; the Phase 3 trial for gMG and status of enrollment in such trial; miv-cel's potential to stabilize or improve disability status for PMS patients with a single dose; Kyverna's transition to a commercial-stage company, clinical execution and significant regulatory progress, and potential readiness for commercial launch of miv-cel in SPS; Kyverna's operating runway Kyverna's potential first-in-class neuroimmunology CAR T franchise; the potential for miv-cel to fundamentally change the treatment paradigm across multiple B-cell-driven autoimmune diseases; miv-cel's potential to deliver durable, drug-free, disease-free remission in autoimmune diseases; any potential benefits of RMAT designation for miv-cel in naSPMS by the FDA; Kyverna's exploration of miv-cel with alternative or no preconditioning and the potential for outpatient administration; and Kyverna's expected upcoming pipeline milestones, including for SPS, gMG, PMS and additional pipeline opportunities. Actual results may differ materially from those indicated by such forward-looking statements as a result of various important factors, including: uncertainties related to market conditions, the possibility that results from prior clinical trials, named-patient access activities and preclinical studies may not necessarily be predictive of future results; the possibility that the FDA or other regulatory agencies may require additional trials or studies to support its intended BLA submission; intellectual property rights; and other factors discussed in the "Risk Factors" section of Kyverna's previously filed Annual Report on Form 10-K for the year ended December 31, 2025 and its Quarterly Report on Form 10-Q for the quarter ended June 30, 2026 to be filed with the U.S. Securities and Exchange Commission on or about the date hereof. Any forward-looking statements contained in this press release are based on the current expectations of Kyverna's management team and speak only as of the date hereof, and Kyverna specifically