Tyra Biosciences Reports Third Quarter 2025 Financial Results and Highlights

- Dosed first patients with dabogratinib in BEACH301 and SURF302; interim results from both studies expected in 2026 -

- Expanded development of dabogratinib into low-grade upper tract urothelial carcinoma (LG-UTUC); IND cleared with U.S. FDA -

- Cash, cash equivalents, and marketable securities of $274.9 million at Q3 2025; runway through at least 2027 -

CARLSBAD, Calif., November 5, 2025 – Tyra Biosciences, Inc. (Nasdaq: TYRA), a clinical-stage biotechnology company focused on developing next-generation precision medicines that target large opportunities in Fibroblast Growth Factor Receptor (FGFR) biology, today reported financial results for the third quarter ended September 30, 2025, and highlighted recent corporate progress.

“Our focus remains on patients – those living with skeletal dysplasia and bladder cancer who need improved, precise options of care,” said Todd Harris, Ph.D., CEO of TYRA. “Enrollment continues to progress across our BEACH301 and SURF302 Phase 2 studies, reflecting strong engagement from the clinical and patient communities. We are also expanding the Phase 2 development of dabogratinib into low-grade upper tract urothelial carcinoma, where FGFR3 alterations occur in approximately 85% of LG-UTUC cases, further reinforcing our commitment to addressing FGFR3-driven disorders.”

Dr. Harris continued, “We believe 2026 will be a pivotal year for TYRA. We expect to report interim Phase 2 results that could validate dabogratinib’s broad potential across achondroplasia, IR-NMIBC and LG-UTUC.”

Third Quarter 2025 and Recent Corporate Highlights

Dabogratinib (formerly TYRA-300)

TYRA-430

TYRA-200

SNÅP Platform and Pipeline

Third Quarter 2025 Financial Results

Upcoming Clinical Milestones:

About Dabogratinib (formerly TYRA-300)

Dabogratinib is TYRA's lead precision medicine candidate stemming from its in-house SNÅP platform. Dabogratinib is an investigational, oral, FGFR3-selective inhibitor currently in development for the treatment of skeletal dysplasia and cancer that has demonstrated interim clinical proof-of-concept results in mUC. The current planned clinical development for dabogratinib includes Phase 2 clinical trials for pediatric achondroplasia (BEACH301), intermediate risk (IR) non-muscle invasive bladder cancer (SURF302), low-grade upper tract urothelial carcinoma (SURF303) and potentially future mUC clinical trials. The FDA has granted Orphan Drug Designation (ODD) and Rare Pediatric Disease (RPD) Designation to dabogratinib for the treatment of achondroplasia.

BEACH301 is a Phase 2, multicenter, open-label, dose-escalation/dose-expansion study evaluating dabogratinib in children ages 3 to 10 with achondroplasia with open growth plates. The study will enroll children who are treatment-naïve (Cohort 1) and those who have received prior growth-accelerating therapy (Cohort 2) at multiple sites across the globe. Each of these cohorts is expected to enroll up to 10 participants per dose level (0.125, 0.25, 0.375, 0.50 mg/kg) for up to

12 months. The study is now enrolling a safety sentinel cohort of at least 3 participants per dose level in children ages 5 to 10.

SURF302 is a Phase 2, open-label, clinical study evaluating the efficacy and safety of dabogratinib in participants with FGFR3-altered low-grade IR NMIBC. Participants will be randomized initially to treatment with dabogratinib at 50 mg once-daily (QD) (Cohort 1) or treatment with dabogratinib at 60 mg QD (Cohort 2). The primary endpoint is complete response (CR) rate at three months. Secondary endpoints include time to recurrence, median duration of response, recurrence free survival, progression free survival, safety and tolerability.

SURF303 will be a Phase 2, open-label, clinical study evaluating the efficacy and safety of dabogratinib in participants with FGFR3-altered LG-UTUC. This study has not yet begun enrolling patients.

About TYRA-430

TYRA-430 is an oral, investigational FGFR4/3-biased inhibitor for FGF19+/FGFR4-driven cancers. The Phase 1 clinical study (SURF431) is a multicenter, open-label, first-in-human study of TYRA-430 and is currently enrolling and dosing adults with advanced HCC and other solid tumors with activating FGF/FGFR pathway aberrations.

About TYRA-200

TYRA-200 is an oral, investigational, FGFR1/2/3 inhibitor with potency against activating FGFR2 gene alterations and resistance mutations. The Phase 1 clinical study of TYRA-200, SURF201, is a multi-center, open label study designed to evaluate the maximum tolerated dose and the recommended Phase 2 dose of TYRA-200, as well as to evaluate the preliminary antitumor activity of TYRA-200. SURF201 is currently enrolling and dosing adults with advanced/metastatic intrahepatic cholangiocarcinoma and other advanced solid tumors with activating alterations in FGFR2.

Please visit the Patients page of our website for more information on our clinical trials.

About Tyra Biosciences

Tyra Biosciences, Inc. (Nasdaq: TYRA) is a clinical-stage biotechnology company focused on developing next-generation precision medicines that target large opportunities in FGFR biology. TYRA's in-house precision medicine platform, SNÅP, enables rapid and precise drug design through iterative molecular SNÅPshots that help predict genetic alterations most likely to cause acquired resistance to existing therapies. TYRA's expertise in FGFR biology has created a differentiated pipeline with clinical-stage programs in targeted oncology and genetically defined conditions. TYRA's lead precision medicine stemming from SNÅP, dabogratinib, is a potential first-in-class selective FGFR3 inhibitor. Dabogratinib's current planned clinical development includes BEACH301 for pediatric ACH, SURF302 for IR NMIBC, SURF303 for LG-UTUC and potentially mUC. TYRA is also developing TYRA-430, an oral, investigational FGFR4/3-biased inhibitor for FGF19+/FGFR4-driven cancers, in the SURF431 study for advanced HCC, and TYRA-200, an oral, investigational, FGFR1/2/3 inhibitor, in the SURF201 study for metastatic intrahepatic cholangiocarcinoma. TYRA is based in Carlsbad, CA.

For more information about our science, pipeline and people, please visit www.tyra.bio and engage with us on LinkedIn.

Forward-Looking Statements

TYRA cautions you that statements contained in this press release regarding matters that are not historical facts are forward-looking statements. The forward-looking statements are based on our current beliefs and expectations and include, but are not limited to: the expected advancement of our pipeline and our growth; the potential to initiate Phase 2 studies of dabogratinib in LG-UTUC and mUC and the timing thereof, and to develop next-generation precision medicines and their potential to be first-in-class; the potential safety and therapeutic benefits of, and market opportunities for, our product candidates; the expected trial design, timing and phase of development of our product candidates, including timing for data readouts and patient dosing; the potential for SNÅP to develop therapies; and our expected cash runway. Actual results may differ from those set forth in this press release due to the risks and uncertainties inherent in our business, including, without limitation: interim results of a clinical trial are not necessarily indicative of final results

and one or more of the clinical outcomes may materially change as patient enrollment continues, following more comprehensive reviews of the data, as follow-up on the outcome of any particular patient continues and as more patient or final data becomes available, including the risk that unconfirmed responses may not ultimately result in confirmed responses to treatment after follow-up evaluations; the potential for proof-of-concept results to fail to result in successful subsequent development of dabogratinib; later developments with the FDA may be inconsistent with prior feedback from the FDA; we are early in our development efforts, and the approach we are taking to discover and develop drugs based on our SNÅP platform is novel and unproven and it may never lead to product candidates that are successful in clinical development or approved products of commercial value; potential delays in the commencement, recruitment, enrollment, data readouts and completion of preclinical studies and clinical trials; results from preclinical studies or early clinical trials not necessarily being predictive of future results; our dependence on third parties in connection with manufacturing, research and preclinical testing; we may expend our limited resources to pursue a particular product candidate and/or indication and fail to capitalize on product candidates or indications with greater development or commercial potential; acceptance by the FDA of INDs or of similar regulatory submissions by comparable foreign regulatory authorities for the conduct of clinical trials of our product candidates; an accelerated development or approval pathway may not be available for dabogratinib or other product candidates and any such pathway may not lead to a faster development process; unexpected adverse side effects or inadequate efficacy of our product candidates that may limit their development, regulatory approval, and/or commercialization; the potential for our programs and prospects to be negatively impacted by developments relating to our competitors, including the results of studies or regulatory determinations relating to our competitors; unfavorable results from preclinical studies; regulatory developments in the United States and foreign countries; our ability to obtain and maintain intellectual property protection for our product candidates and proprietary technologies; we may use our capital resources sooner than we expect; unstable market and economic conditions and changes in healthcare legislation, tariffs and trade policies may adversely affect our business and financial condition and the broader economy and biotechnology industry; and other risks described in our prior filings with the Securities and Exchange Commission (SEC), including under the heading "Risk Factors" in our annual report on Form 10-K and any subsequent filings with the SEC. You are cautioned not to place undue reliance on these forward-looking statements, which speak only as of the date hereof, and we undertake no obligation to update such statements to reflect events that occur or circumstances that exist after the date hereof. All forward-looking statements are qualified in their entirety by this cautionary statement, which is made under the safe harbor provisions of the Private Securities Litigation Reform Act of 1995.

Contact:

Amy Conrad

aconrad@tyra.bio

Tyra Biosciences, Inc.

Condensed Balance Sheet Data

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Tyra Biosciences, Inc.

Condensed Statements of Operations and Comprehensive Loss

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