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Zembrace® SymTouch® and Tosymra® will be marketed by Tonix Medicines, Tonix’s wholly-owned commercial subsidiary Commercial capabilities prepare Tonix for the potential launch in 2025 of Tonmya™ for the management of fibromyalgia, assuming FDA approval CHATHAM, N.J., March 19, 2024 (GLOBE NEWSWIRE) -- Tonix Pharmaceuticals, Inc. (Nasdaq: TNXP) (Tonix or the Company), a biopharmaceutical company with marketed products and a pipeline of development candidates, today announced that it will achieve its goal of transitioning to a fully integrated pharmaceutical company on April 1, 2024. Since the acquisition of Zembrace® SymTouch® (sumatriptan injection) 3 mg and Tosymra® (sumatriptan nasal spray) 10 mg on June 30, 2023, Tonix Pharmaceuticals has been putting in place the personnel, systems and contracts required to support a commercial organization. Both products are indicated for the treatment of acute migraine with or without aura in adults. “Tonix will become a fully integrated biopharmaceutical company with a mission of developing and marketing innovative, high-value therapeutics,” said Seth Lederman, M.D., Chief Executive Officer of Tonix Pharmaceuticals. “Tonix will assume responsibility for the distribution, selling and marketing of Zembrace SymTouch and Tosymra, as well as supply chain, regulatory and quality control of the two products.” Dr. Lederman added, “The assumption of commercial activities by Tonix represents an important milestone in the evolution of Tonix as we continue to build and strengthen our commercial organization for the potential launch of Tonmya™ (cyclobenzaprine HCl sublingual tablets) for fibromyalgia in 2025, assuming approval by the U.S. Food and Drug Administration (FDA).” About Zembrace® SymTouch® and Tosymra® Zembrace SymTouch is the only actively promoted brand of sumatriptan autoinjector in the United States (other sumatriptan autoinjector products on the market are Imitrex® and generics to Imitrex®). It has a unique low dose and has demonstrated onset of migraine pain relief in as few as 10 minutes (17% of patients vs. 5% for placebo).1 Zembrace SymTouch also demonstrated migraine pain freedom for 46% of patients (vs 27% for placebo) at 2 hours in a single-attack, double-blind study (N=230).1 Zembrace SymTouch currently has patent protection to 2036. Tosymra employs Intravail® permeation enhancer technology and is pharmacokinetically equivalent to 4 mg subcutaneous sumatriptan.2 Tosymra delivers migraine pain relief in as little as 10 minutes with just one spray for some patients (13% vs. 5% for placebo).2 Tosymra currently has patent protection to 2031. About Migraine Nearly 40 million people in the United States suffer from migraine3 and it has been recognized as the second leading cause of disability in the world.4 Migraine is characterized by debilitating attacks lasting four to 72 hours with multiple symptoms, including pulsating headaches of moderate to severe pain intensity often associated with nausea or vomiting, and/or sensitivity to sound (phonophobia) and sensitivity to light (photophobia).3 References: Zembrace SymTouch [package insert]. Maple Grove, MN: Upsher-Smith Laboratories, LLC: February 2021. Tosymra [package insert]. Maple Grove, MN: Upsher-Smith Laboratories, LLC: Feb 2021. Headache Classification Committee of the International Headache Society (IHS). The international classification of headache disorders, 3rd edition. Cephalalgia. 2018;38(1):1–211. GBD 2016 Headache Collaborators. Global, regional, and national burden of migraine and tension-type headache, 1990-2016: a systematic analysis for the Global Burden of Disease Study 2016. Lancet Neurol 2018;17(11):954-976. About Tonmya* (also known as TNX-102 SL) Tonmya is a centrally acting, non-opioid, non-addictive, bedtime medication. The tablet is a patented sublingual formulation of cyclobenzaprine hydrochloride developed for the management of fibromyalgia. In December 2023, the company announced highly statistically significant and clinically meaningful topline results in RESILIENT, a second positive Phase 3 clinical trial of Tonmya for the management of fibromyalgia. In the study, Tonmya met its pre-specified primary endpoint, significantly reducing daily pain compared to placebo (p=0.00005) in participants with fibromyalgia. Statistically significant and clinically meaningful results were also seen in all key secondary endpoints related to improving sleep quality, reducing fatigue and improving overall fibromyalgia symptoms and function. RELIEF, the first positive Phase 3 trial of Tonmya in fibromyalgia, was completed in December 2020. It met its pre-specified primary endpoint of daily pain reduction compared to placebo (p=0.010) and showed activity in key secondary endpoints. *Tonmya™ is conditionally accepted by the U.S. Food and Drug Administration as the tradename for TNX-102 SL for the management of fibromyalgia. Tonmya has not been approved for any indication. Tonix Pharmaceuticals Holding Corp.* Tonix is a biopharmaceutical company focused on developing, licensing and commercializing therapeutics to treat and prevent human disease and alleviate suffering. Tonix’s development portfolio is focused on central nervous system (CNS) disorders. Tonix’s priority is to submit a New Drug Application (NDA) to the FDA in the second half of 2024 for Tonmya, a product candidate for which two positive Phase 3 studies have been completed for the management of fibromyalgia. TNX-102 SL is also being developed to treat acute stress reaction as well as fibromyalgia-type Long COVID. Tonix’s CNS portfolio includes TNX-1300 (cocaine esterase) a biologic designed to treat cocaine intoxication with Breakthrough Therapy designation. Tonix’s immunology development portfolio consists of biologics to address organ transplant rejection, autoimmunity and cancer, including TNX-1500, which is a humanized monoclonal antibody targeting CD40-ligand (CD40L or CD154) being developed for the prevention of allograft rejection and for the treatment of autoimmune diseases. Tonix also has product candidates in development in the areas of rare disease and infectious disease. Tonix Medicines, our commercial subsidiary, markets Zembrace® SymTouch® (sumatriptan injection) 3 mg and Tosymra® (sumatriptan nasal spray) 10 mg for the treatment of acute migraine with or without aura in adults. *Tonix’s product development candidates are investigational new drugs or biologics and have not been approved for any indication. Zembrace SymTouch and Tosymra are registered trademarks of Tonix Medicines. All other marks are property of their respective owners. This press release and further information about Tonix can be found at . Forward Looking Statements Certain statements in this press release are forward-looking within the meaning of the Private Securities Litigation Reform Act of 1995. These statements may be identified by the use of forward-looking words such as “anticipate,” “believe,” “forecast,” “estimate,” “expect,” and “intend,” among others. These forward-looking statements are based on Tonix's current expectations and actual results could differ materially. There are a number of factors that could cause actual events to differ materially from those indicated by such forward-looking statements. These factors include, but are not limited to, risks related to the failure to obtain FDA clearances or approvals and noncompliance with FDA regulations; risks related to the failure to successfully market any of our products; risks related to the timing and progress of clinical development of our product candidates; our need for additional financing; uncertainties of patent protection and litigation; uncertainties of government or third party payor reimbursement; limited research and development efforts and dependence upon third parties; and substantial competition. As with any pharmaceutical under development, there are significant risks in the development, regulatory approval and commercialization of new products. Tonix does not undertake an obligation to update or revise any forward-looking statement. Investors should read the risk factors set forth in the Annual Report on Form 10-K for the year ended December 31, 2022, as filed with the Securities and Exchange Commission (the “SEC”) on March 13, 2023, and periodic reports filed with the SEC on or after the date thereof. All of Tonix's forward-looking statements are expressly qualified by all such risk factors and other cautionary statements. The information set forth herein speaks only as of the date thereof. Investor Contact Jessica Morris Tonix Pharmaceuticals investor.relations@tonixpharma.com (862) 904-8182 Peter Vozzo ICR Westwicke peter.vozzo@westwicke.com (443) 213-0505 Media Contact Ben Shannon ICR Westwicke ben.shannon@westwicke.com (919) 360-3039 Zembrace® SymTouch® (sumatriptan Injection): IMPORTANT SAFETY INFORMATION Zembrace SymTouch (Zembrace) can cause serious side effects, including heart attack and other heart problems, which may lead to death. Stop use and get emergency help if you have any signs of a heart attack: discomfort in the center of your chest that lasts for more than a few minutes or goes away and comes back severe tightness, pain, pressure, or heaviness in your chest, throat, neck, or jaw pain or discomfort in your arms, back, neck, jaw or stomach shortness of breath with or without chest discomfort breaking out in a cold sweat nausea or vomiting feeling lightheaded Zembrace is not for people with risk factors for heart disease (high blood pressure or cholesterol, smoking, overweight, diabetes, family history of heart disease) unless a heart exam shows no problem. Do not use Zembrace if you have: history of heart problems narrowing of blood vessels to your legs, arms, stomach, or kidney (peripheral vascular disease) uncontrolled high blood pressure hemiplegic or basilar migraines. If you are not sure if you have these, ask your provider. had a stroke, transient ischemic attacks (TIAs), or problems with blood circulation severe liver problems taken any of the following medicines in the last 24 hours: almotriptan, eletriptan, frovatriptan, naratriptan, rizatriptan, ergotamines, dihydroergotamine. are taking certain antidepressants, known as monoamine oxidase (MAO)-A inhibitors or it has been 2 weeks or less since you stopped taking a MAO-A inhibitor. Ask your provider for a list of these medicines if you are not sure. an allergy to sumatriptan or any of the components of Zembrace Tell your provider about all of your medical conditions and medicines you take, including vitamins and supplements. Zembrace can cause dizziness, weakness, or drowsiness. If so, do not drive a car, use machinery, or do anything where you need to be alert. Zembrace may cause serious side effects including: changes in color or sensation in your fingers and toes sudden or severe stomach pain, stomach pain after meals, weight loss, nausea or vomiting, constipation or diarrhea, bloody diarrhea, fever cramping and pain in your legs or hips; feeling of heaviness or tightness in your leg muscles; burning or aching pain in your feet or toes while resting; numbness, tingling, or weakness in your legs; cold feeling or color changes in one or both legs or feet increased blood pressure including a sudden severe increase even if you have no history of high blood pressure medication overuse headaches from using migraine medicine for 10 or more days each month. If your headaches get worse, call your provider. serotonin syndrome, a rare but serious problem that can happen in people using Zembrace, especially when used with anti-depressant medicines called SSRIs or SNRIs. Call your provider right away if you have: mental changes such as seeing things that are not there (hallucinations), agitation, or coma; fast heartbeat; changes in blood pressure; high body temperature; tight muscles; or trouble walking. hives (itchy bumps); swelling of your tongue, mouth, or throat seizures even in people who have never had seizures before The most common side effects of Zembrace include: pain and redness at injection site; tingling or numbness in your fingers or toes; dizziness; warm, hot, burning feeling to your face (flushing); discomfort or stiffness in your neck; feeling weak, drowsy, or tired. Tell your provider if you have any side effect that bothers you or does not go away. These are not all the possible side effects of Zembrace. For more information, ask your provider. This is the most important information to know about Zembrace but is not comprehensive. For more information, talk to your provider and read the Patient Information and Instructions for Use. You can also visit or call 1-888-869-7633. You are encouraged to report adverse effects of prescription drugs to the FDA. Visit , or call 1-800-FDA-1088. INDICATION AND USAGE Zembrace is a prescription medicine used to treat acute migraine headaches with or without aura in adults who have been diagnosed with migraine. Zembrace is not used to prevent migraines. It is not known if it is safe and effective in children under 18 years of age. Tosymra® (sumatriptan nasal spray): IMPORTANTSAFETYINFORMATION Tosymra can cause serious side effects, including heart attack and other heart problems, which may lead to death. Stop Tosymra and get emergency medical help if you have any signs of heart attack: discomfort in the center of your chest that lasts for more than a few minutes or goes away and comes back severe tightness, pain, pressure, or heaviness in your chest, throat, neck, or jaw pain or discomfort in your arms, back, neck, jaw, or stomach shortness of breath with or without chest discomfort breaking out in a cold sweat nausea or vomiting feeling lightheaded Tosymra is not for people with risk factors for heart disease (high blood pressure or cholesterol, smoking, overweight, diabetes, family history of heart disease) unless a heart exam is done and shows no problem. Do not use Tosymra if you have: history of heart problems narrowing of blood vessels to your legs, arms, stomach, or kidney (peripheral vascular disease) uncontrolled high blood pressure severe liver problems hemiplegic or basilar migraines. If you are not sure if you have these, ask your healthcare provider. had a stroke, transient ischemic attacks (TIAs), or problems with blood circulation taken any of the following medicines in the last 24 hours: almotriptan, eletriptan, frovatriptan, naratriptan, rizatriptan, ergotamines, or dihydroergotamine. Ask your provider if you are not sure if your medicine is listed above. are taking certain antidepressants, known as monoamine oxidase (MAO)-A inhibitors or it has been 2 weeks or less since you stopped taking a MAO-A inhibitor. Ask your provider for a list of these medicines if you are not sure. an allergy to sumatriptan or any ingredient in Tosymra Tell your provider about all of your medical conditions and medicines you take, including vitamins and supplements. Tosymra can cause dizziness, weakness, or drowsiness. If so, do not drive a car, use machinery, or do anything where you need to be alert. Tosymra may cause serious side effects including: changes in color or sensation in your fingers and toes sudden or severe stomach pain, stomach pain after meals, weight loss, nausea or vomiting, constipation or diarrhea, bloody diarrhea, fever cramping and pain in your legs or hips, feeling of heaviness or tightness in your leg muscles, burning or aching pain in your feet or toes while resting, numbness, tingling, or weakness in your legs, cold feeling or color changes in one or both legs or feet increased blood pressure including a sudden severe increase even if you have no history of high blood pressure medication overuse headaches from using migraine medicine for 10 or more days each month. If your headaches get worse, call your provider. serotonin syndrome, a rare but serious problem that can happen in people using Tosymra, especially when used with anti-depressant medicines called SSRIs or SNRIs. Call your provider right away if you have: mental changes such as seeing things that are not there (hallucinations), agitation, or coma; fast heartbeat; changes in blood pressure; high body temperature; tight muscles; or trouble walking. hives (itchy bumps); swelling of your tongue, mouth, or throat seizures even in people who have never had seizures before The most common side effects of Tosymra include: tingling, dizziness, feeling warm or hot, burning feeling, feeling of heaviness, feeling of pressure, flushing, feeling of tightness, numbness, application site (nasal) reactions, abnormal taste, and throat irritation. Tell your provider if you have any side effect that bothers you or does not go away. These are not all the possible side effects of Tosymra. For more information, ask your provider. This is the most important information to know about Tosymra but is not comprehensive. For more information, talk to your provider and read the Patient Information and Instructions for Use. You can also visit or call 1-888-869-7633. You are encouraged to report negative side effects of prescription drugs to the FDA. Visit or call 1-800-FDA-1088. INDICATION AND USAGE Tosymra is a prescription medicine used to treat acute migraine headaches with or without aura in adults. Tosymra is not used to treat other types of headaches such as hemiplegic or basilar migraines or cluster headaches. Tosymra is not used to prevent migraines. It is not known if Tosymra is safe and effective in children under 18 years of age.

- Enrollment completed in Phase 1b/2a clinical trial of AJ201 for spinal and bulbar muscular atrophy; topline data expected in second quarter of 2024 - - Presented positive BAER-101 preclinical data at American Epilepsy Society (AES) and American Society for Experimental Neurotherapeutics (ASENT) Annual Meetings and in publication Drug Development Research - - Final agreement reached with FDA on study design and analysis approach for Phase 3 safety study of IV tramadol – MIAMI, March 18, 2024 (GLOBE NEWSWIRE) -- Avenue Therapeutics, Inc. (Nasdaq: ATXI) (“Avenue” or the “Company”), a specialty pharmaceutical company focused on the development and commercialization of therapies for the treatment of neurologic diseases, today reported financial results and recent corporate highlights for the year ended December 31, 2023. “We made considerable progress across our pipeline of differentiated neurologic therapies in 2023," said Alexandra MacLean, M.D., Chief Executive Officer of Avenue. “Avenue demonstrated tremendous execution capabilities with our lead clinical program AJ201, a potential first-in-class treatment for spinal and bulbar muscular atrophy (SBMA), also known as Kennedy’s Disease. Within nine months of acquiring the rights to AJ201 in March 2023, we dosed the first patient in the Phase 1b/2a clinical trial, and we completed trial enrollment of 25 SBMA patients across six sites in the U.S. We remain on track to report topline data for AJ201 in the second quarter of 2024, an incredibly exciting milestone for both the Company and patients suffering from SBMA, a debilitating rare neuromuscular disorder with no approved treatments in the U.S. Additionally, we have progressed BAER-101 for the treatment of epilepsy by presenting preclinical data from a translational animal model in multiple peer-reviewed forums. We have also advanced IV tramadol, reaching final agreement with the U.S. Food and Drug Administration (FDA) on the safety study and statistical analysis approach for the final Phase 3 study. Pending additional financing, we look forward to progressing BAER-101 and IV tramadol for patients facing great unmet need. We look forward to another productive year in 2024 as we continue to make significant strides across our clinical pipeline and advance our mission of providing impactful therapies to patients suffering from neurologic diseases.” Recent Corporate Highlights: AJ201 (Nrf1 and Nrf2 activator, androgen receptor degradation enhancer for SBMA) In January 2024, Avenue completed enrollment in the Phase 1b/2a clinical trial of AJ201 for the treatment of SBMA. The 12-week, multicenter, randomized, double-blind Phase 1b/2a clinical trial of AJ201 enrolled 25 patients randomly assigned to AJ201 (600 mg/day) or placebo. The primary endpoint of the study is to assess safety and tolerability of AJ201 in subjects with clinically and genetically defined SBMA. Topline data for the Phase 1b/2a study are anticipated in the second quarter of 2024. More information about this study can be found at ClinicalTrials.gov (Identifier: NCT05517603). BAER-101 (GABAA α2/3 positive allosteric modulator) Avenue presented preclinical results for BAER-101, a potentially best-in-class selective GABAA α2,3 positive allosteric modulator, in three scientific peer-reviewed settings, including the American Epilepsy Society (AES) Annual Meeting in December 2023, the publication Drug Development Research in February 2024 and the American Society for Experimental Neurotherapeutics (ASENT) Annual Meeting in March 2024. The in vivo data showcase BAER-101’s ability to significantly suppress seizures using the SynapCell’s Genetic Absence Epilepsy Rat from Strasbourg (“GAERS”) model of epilepsy. BAER-101 fully suppressed seizure activity in the GAERS model with a minimal effective dose of 0.3 mg/kg, PO, and the effect was fast in onset and stable throughout the duration of testing. The data also demonstrated BAER-101’s ability to selectively target GABAA α2 and α3 subtypes more than α1 and α5, potentially improving anti-convulsant and anxiolytic activity while minimizing the risk of tolerance and abuse associated with existing treatments in this drug class. Subject to obtaining the necessary financing, which could be provided through a strategic partnership, Avenue plans to initiate a Phase 2a clinical trial of BAER-101 to further study its anti-seizure properties in patients with common or rare epilepsies. IV Tramadol In January 2024, Avenue reached final agreement with the FDA on the safety study protocol and statistical analysis approach for the Phase 3 study for intravenous (“IV”) tramadol, which is in development for the treatment of acute post-operative pain in a medically supervised setting. The final non-inferiority study is designed to assess the theoretical risk of opioid-induced respiratory depression related to opioid stacking on IV tramadol compared to IV morphine. The study will randomize approximately 300 post bunionectomy patients to IV tramadol or IV morphine for pain relief administered during a 48-hour post-operative period. Patients will have access to IV hydromorphone, a Schedule II opioid, for rescue of breakthrough pain. Pending additional financing, Avenue aims to initiate the Phase 3 safety study as soon as feasible. The Company believes that the study can be completed and submitted to the FDA within 12 months of the study’s initiation. General Corporate In March 2024, Avenue announced that the Nasdaq Hearings Panel granted the Company’s request for an extension to evidence compliance with all applicable criteria for continued listing on The Nasdaq Capital Market, including the $1.00 bid price and $2.5 million stockholders’ equity requirements, through May 20, 2024. 2023 Financial Results: Cash Position: As of December 31, 2023, cash and cash equivalents totaled $1.8 million, compared to $6.7 million at December 31, 2022, a decrease of $4.9 million. In January 2024, the Company completed a warrant inducement transaction resulting in $5.0 million in gross proceeds.R&D Expenses: Research and development expenses for the full year 2023 were $6.1 million, compared to $2.7 million in 2022. Additionally, there was $4.2 million in expense for the acquisition of the AJ201 license in 2023.G&A Expenses: General and administrative expenses for the full year 2023 were $4.2 million, compared to $5.3 million in 2022.Net Loss: Net loss for the full year 2023 was $10.5 million, or $0.98 per share, compared to a net loss of $3.6 million, or $1.63 per share, in 2022. About Avenue TherapeuticsAvenue Therapeutics, Inc. (Nasdaq: ATXI) is a specialty pharmaceutical company focused on the development and commercialization of therapies for the treatment of neurologic diseases. It is currently developing three assets including AJ201, a first-in-class asset for spinal and bulbar muscular atrophy, BAER-101, an oral small molecule selective GABAA α2, α3 receptor positive allosteric modulator for CNS diseases, and IV tramadol, which is in Phase 3 clinical development for the management of acute postoperative pain in adults in a medically supervised healthcare setting. Avenue is headquartered in Miami, FL and was founded by Fortress Biotech, Inc. (Nasdaq: FBIO). For more information, visit www.avenuetx.com. Forward-Looking StatementsThis press release contains predictive or “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995. All statements other than statements of current or historical fact contained in this press release, including statements that express our intentions, plans, objectives, beliefs, expectations, strategies, predictions or any other statements relating to our future activities or other future events or conditions are forward-looking statements. The words “anticipate,” “believe,” “continue,” “could,” “estimate,” “expect,” “intend,” “may,” “plan,” “predict,” “project,” “will,” “should,” “would” and similar expressions are intended to identify forward-looking statements. These statements are based on current expectations, estimates and projections made by management about our business, our industry and other conditions affecting our financial condition, results of operations or business prospects. These statements are not guarantees of future performance and involve risks, uncertainties and assumptions that are difficult to predict. Therefore, actual outcomes and results may differ materially from what is expressed or forecasted in, or implied by, the forward-looking statements due to numerous risks and uncertainties. Factors that could cause such outcomes and results to differ include, but are not limited to, risks and uncertainties arising from: the fact that we currently have no drug products for sale and that our success is dependent on our product candidates receiving regulatory approval and being successfully commercialized; the possibility that serious adverse or unacceptable side effects are identified during the development of our current or future product candidates, such that we would need to abandon or limit development of some of our product candidates; our ability to successfully develop, partner, or commercialize any of our current or future product candidates including AJ201, IV tramadol, and BAER-101; the substantial doubt raised about our ability to continue as a going concern, which may hinder our ability to obtain future financing; the significant losses we have incurred since inception and our expectation that we will continue to incur losses for the foreseeable future; our need for substantial additional funding, which may not be available to us on acceptable terms, or at all, which unavailability of could force us to delay, reduce or eliminate our product development programs or commercialization efforts; our reliance on third parties for several aspects of our operations; our reliance on clinical data and results obtained by third parties that could ultimately prove to be inaccurate, or unreliable, or unacceptable to regulatory authorities; the possibility that we may not receive regulatory approval for any or all of our product candidates, or that such approval may be significantly delayed due to scientific or regulatory reasons; the fact that even if one or more of our product candidates receives regulatory approval, they will remain subject to substantial regulatory scrutiny; the effects of current and future laws and regulations relating to fraud and abuse, false claims, transparency, health information privacy and security, and other healthcare laws and regulations; the effects of competition for our product candidates and the potential for new products to emerge that provide different or better therapeutic alternatives for our targeted indications; the possibility that the government or third-party payors fail to provide adequate coverage and payment rates for our product candidates or any future products; our ability to establish sales and marketing capabilities or to enter into agreements with third parties to market and sell our product candidates; our exposure to potential product liability claims; related to the protection of our intellectual property and our potential inability to maintain sufficient patent protection for our technology and products; our ability to maintain compliance with the obligations under our intellectual property licenses and funding arrangements with third parties, without which licenses and arrangements we could lose rights that are important to our business; the fact that Fortress Biotech, Inc. controls a majority of the voting power of our outstanding capital stock and has rights to receive significant share grants annually;; and those risks discussed in our filings which we make with the SEC. Any forward-looking statements speak only as of the date on which they are made, and we undertake no obligation to publicly update or revise any forward-looking statements to reflect events or circumstances that may arise after the date of this press release, except as required by applicable law. Investors should evaluate any statements made by us in light of these important factors. Contact: Jaclyn JaffeAvenue Therapeutics, Inc. (781) 652-4500ir@avenuetx.com AVENUE THERAPEUTICS, INC.Consolidated Balance Sheets($ in thousands, except for share and per share amounts) December 31, December 31, 2023 2022 ASSETS Current assets: Cash and cash equivalents$1,783 $6,708 Prepaid expenses and other current assets 67 137 Total assets$1,850 $6,845 LIABILITIES AND STOCKHOLDERS’ EQUITY Current liabilities: Accounts payable and accrued expenses$287 $949 Accounts payable and accrued expenses - related party 323 21 Warrant liability 586 2,609 Total current liabilities 1,196 3,579 Total liabilities 1,196 3,579 Commitments and Contingencies Stockholders’ equity Preferred stock ($0.0001 par value), 2,000,000 shares authorized Class A Preferred stock, 250,000 shares issued and outstanding as of December 31, 2023 and 2022, respectively — — Common stock ($0.0001 par value) Common shares, 75,000,000 shares authorized and 25,597,622 shares issued and outstanding as of December 31, 2023; and 20,000,000 shares authorized and 4,773,841 shares issued and outstanding as of December 31, 2022 3 — Additional paid-in capital 92,507 84,456 Accumulated deficit (90,928) (80,551)Total stockholders’ equity attributed to the Company 1,582 3,905 Non-controlling interests (928) (639)Total stockholders’ equity 654 3,266 Total liabilities and stockholders’ equity$1,850 $6,845 AVENUE THERAPEUTICS, INC.Consolidated Statements of Operations($ in thousands, except for share and per share amounts) For the Years Ended December 31, December 31, 2023 2022 Operating expenses Research and development$6,131 $2,698 Research and development - licenses acquired 4,230 — General and administrative 4,179 5,345 Loss from operations (14,540) (8,043) Interest income (126) (20)Financing costs – warrant liabilities 332 1,160 Change in fair value of warrant liabilities (4,258) (5,580)Net loss$(10,488) $(3,603) Net loss attributable to non-controlling interests (111) (51)Net loss attributable to common stockholders$(10,377) $(3,552) Net loss per common share attributable to common stockholders, basic and diluted$(0.98) $(1.63) Weighted average number of common shares outstanding, basic and diluted 10,591,636 2,185,159

AstraZeneca and GSK aim to bring their PD-1/L1 combinations to a broad front-line endometrial cancer population. After a quick FDA approval in a subset of endometrial cancer, GSK is back with more data for two Jemperli regimens in hopes of reaching a broader patient population. And AstraZeneca, utilizing a similar immunotherapy strategy, has also come up with a rivaling update as it awaits an FDA decision. For GSK, Jemperli plus chemotherapy showed a “clinically meaningful trend” in reducing the risk of death by 21% among patients with advanced endometrial cancer that’s mismatch repair proficient (pMMR) or microsatellite stable (MSS). Patients on the Jemperli regimen lived a median 34 months, compared with 27 months for those on chemo alone. The data, from an exploratory analysis of the first part of the phase 3 RUBY trial, were shared at the Society of Gynecologic Oncology (SGO) annual meeting. They come as part of a statistically significant overall survival win for the Jemperli-chemo combo in the overall trial group as it cut the risk of death by 31% in a broader endometrial cancer population that also includes patients with mismatch repair deficient (dMMR) or microsatellite instability-high (MSI-H) tumors. With the updated analysis from RUBY Part 1, GSK said it expects the FDA will accept its submission to expand the PD-1 inhibitor Jemperli to the overall front-line endometrial cancer population in the first half of this year. The Jemperli-chemo combo was already greenlighted in July just for dMMR/MSI-H patients, who account for about 15% to 20% of new advanced endometrial cancer diagnoses in the U.S. Simultaneously, Part 2 of the RUBY trial found that a cocktail of Jemperli, chemo and GSK’s PARP inhibitor Zejula reduced the risk of progression or death by 37% in pMMR/MSS patients, according to data shared at SGO 2024. For the overall population, which also includes dMMR/MSI-H patients, the risk reduction was 40%. The Part 2 findings are particularly meaningful for patients with pMMR/MSS tumors as they further improved on the benefit observed for the Jemperli-chemo regimen in Part 1, Mansoor Raza Mirza, M.D., from the Copenhagen University Hospital and RUBY principal investigator, said in a statement Saturday. Previously, Jemperli and chemo cut the risk of progression or death by 24% versus chemo in the pMMR subgroup. However, the Part 2 data also raised the question of whether the further addition of Zejula is necessary for dMMR/MSI-H patients. Among that subset of patients, the Zejula-Jemperli-chemo combo showed a 52% advantage in progression-free survival over chemo alone, which was even smaller than the impressive 72% risk reduction Jemperli-chemo had posted without the PARP drug. Zejula appears to have brought extra toxicity. In Part 1, grade 3 or higher treatment-emergent adverse events were about 12% higher for Jemperli and chemo compared with control. In Part 2, the Zejula-containing regimen tripled that difference to about 36%. The potential longer-term detriment from PARP inhibitors have lately drawn attention at the FDA, leading to market withdrawal, restricted new approval or delayed application.  A GSK spokesperson said the company was unable to provide additional details about its regulatory plans at this time. Meanwhile, AstraZeneca could face the same question of patient selection for its PD-L1 inhibitor Imfinzi and Merck-shared PARP drug Lynparza in first-line endometrial cancer. In an interim analysis of AZ’s phase 3 DUO-E trial shared at SGO 2024, a combination of Imfinzi, Lynparza and chemo cut the risk of death in dMMR/MSI-H endometrial cancer patients by 72% over chemo, a slight improvement from the 66% posted by the Imfinzi-chemo pairing. None of these numbers were mature or statistically significant. Previously, the trial found that the Lynparza-containing regimen reduced the risk of progression or death by 59% over chemo alone, whereas Imfinzi and chemo could already cut that risk by 58%, according to results announced in October. In the overall trial population that also includes pMMR patients, the Imfinzi-chemo pairing so far cut the risk of death by 23%, whereas the Lynparza-containing regimen delivered a 41% showing. Again, the data were immature as only 28% of deaths had happened across the three trial arms before a final overall survival analysis. The overall survival data are promising at this early stage of maturity, Andrea Mugan, AstraZeneca’s global franchise head of gynecological and genitourinary cancers, said in an interview with Fierce Pharma. As PARP inhibitor’s contribution in dMMR tumors comes into question, AZ also faces the question of whether Imfinzi could handle pMMR disease without Lynparza. During the current interim analysis, Imfinzi plus chemo only pared down the risk of death by 9% in pMMR patients, while adding Lynparza widened that to 31%. Imfinzi-chemo showed a progression-free survival benefit of 23% in this subgroup, versus 43% for the Lynparza regimen, according to data first released in October. “We do believe in the data we’re showing for the benefit of both regimens in the first-line endometrial cancer population,” Mugan said. But she acknowledged that Imfinzi showed the biggest benefit in the dMMR population, and that the “incremental benefit” for Lynparza was more pronounced in the pMMR subgroup. AZ’s filings for DUO-E have been accepted by the FDA, the European Medicines Agency and regulators in Japan, the company said. It’s not clear whether AZ is gunning for approvals for both regimens for both dMMR and pMMR cancers.