Citius Oncology, Inc. Announces First Reported Revenue Following Successful Launch of LYMPHIR™

Business Highlights and Subsequent Developments

• Initiated U.S. commercial launch of LYMPHIR™ (denileukin diftitox-cxdl) in December 2025, establishing Citius Oncology as a commercial-stage oncology company with an FDA-approved IL-2 receptor-directed immunotherapy for adult patients with relapsed or refractory Stage I–III cutaneous T-cell lymphoma (CTCL) following at least one prior systemic therapy;
• Established nationwide specialty distribution infrastructure, completing initial distributor sales to ensure immediate product availability across U.S. treatment centers and support rapid physician adoption;
• Initiated treatment of CTCL patients at leading U.S. cancer centers;
• Deployed an AI-enabled commercial platform to drive targeted physician engagement, optimize field execution, and efficiently penetrate a highly concentrated prescriber base; and,
• Advanced international access strategy outside the U.S. through regional distribution partners and Named Patient Programs (NPPs) in key European and Middle Eastern markets, enabling patient access where permitted by local law without constituting commercial approval;
• Continued to expand long-term value optionality through investigator-initiated Phase I combination studies evaluating LYMPHIR:
• in combination with pembrolizumab in patients with recurrent solid tumors; and,
• as part of lymphodepletion regimens prior to CAR-T therapy, supporting potential future label expansion opportunities.

First Quarter 2026 Financial Highlights

• Cash and cash equivalents totaled $7.3 million as of December 31, 2025;
• Completed a registered offering in December 2025, generating net proceeds of approximately $15.1 million;
• Revenue of $3.9 million during the quarter ended December 31, 2025 reflects sales related to the launch of LYMPHIR;
• Research and development expenses were $1.0 million, compared to $1.3 million in the prior-year period, reflecting reduced clinical development activity;
• General and administrative expenses were $2.9 million, compared to $3.3 million in the prior-year period;
• Stock-based compensation expense totaled $4.0 million, primarily related to equity grants issued in September 2025, compared to $1.8 million in the prior-year period; and,
• Net loss for the quarter was $5.5 million, or $(0.06) per share, compared to a net loss of $6.7 million, or $(0.09) per share, for the prior-year period.

About Citius Oncology, Inc.

Citius Oncology, Inc. (Nasdaq: CTOR) is a platform to develop and commercialize novel targeted oncology therapies. In December 2025, Citius Oncology launched LYMPHIR, approved by the FDA for the treatment of adults with relapsed or refractory Stage I–III CTCL who had had at least one prior systemic therapy. Management estimates the initial market for LYMPHIR currently exceeds $400 million, is growing, and is underserved by existing therapies. Robust intellectual property protections that span orphan drug designation, complex technology, trade secrets and pending patents for immuno-oncology use as a combination therapy with checkpoint inhibitors would further support Citius Oncology's competitive positioning. For more information, please visit www.citiusonc.com.

About Citius Pharmaceuticals, Inc.

Citius Pharmaceuticals, Inc. (Nasdaq: CTXR) is a biopharmaceutical company dedicated to the development and commercialization of first-in-class critical care products. Citius Pharma owns approximately 75% of Citius Oncology. In December 2025, Citius Oncology launched LYMPHIR, a targeted immunotherapy for the treatment of adults with relapsed or refractory Stage I–III CTCL who had had at least one prior systemic therapy. Citius Pharma's late-stage pipeline also includes Mino-Lok^®, a catheter lock solution to salvage catheters in patients with catheter-related bloodstream infections, and CITI-002 (Halo-Lido), a topical formulation for the relief of hemorrhoids. A pivotal Phase 3 trial for Mino-Lok and a Phase 2b trial for Halo-Lido were completed in 2023. Mino-Lok met primary and secondary endpoints of its Phase 3 trial. Citius Pharma is actively engaged with the FDA to outline next steps for both programs. For more information, please visit www.citiuspharma.com.

Forward-Looking Statements

This press release may contain "forward-looking statements" within the meaning of Section 27A of the Securities Act of 1933 and Section 21E of the Securities Exchange Act of 1934. Such statements are made based on our expectations and beliefs concerning future events impacting Citius Oncology. You can identify these statements by the fact that they use words such as "will," "anticipate," "estimate," "expect," "plan," "should," and "may" and other words and terms of similar meaning or use of future dates. Forward-looking statements are based on management's current expectations and are subject to risks and uncertainties that could negatively affect our business, operating results, financial condition and stock price.  Factors that could cause actual results to differ materially from those currently anticipated are: our ability to maintain Nasdaq's continued listing standards; our ability to successfully commercialize LYMPHIR and establish a sustainable revenue stream; the estimated markets for LYMPHIR and our product candidates and the acceptance thereof by any market; our ability to secure strategic partnerships and expand international access to LYMPHIR; our ability to use the latest technology to support our commercialization efforts for LYMPHIR; physician and patient acceptance of LYMPHIR in a competitive treatment landscape; our reliance on third-party logistics providers, distributors, and specialty pharmacies to support commercial operations; our ability to educate providers and payers, secure adequate reimbursement, and maintain uninterrupted product supply; post-marketing requirements and ongoing regulatory compliance related to LYMPHIR; the ability of LYMPHIR and our product candidates to impact the quality of life of our target patient populations; our need for substantial additional funds and our ability to raise additional money to fund our operations for at least the next 12 months as a going concern; risks relating to the results of research and development activities, including those from any new pipeline assets; our ability to procure cGMP commercial-scale supply; our ability to obtain, perform under and maintain financing and strategic agreements and relationships; market and other conditions; risks related to our growth strategy; patent and intellectual property matters; government regulation; as well as other risks described in our Securities and Exchange Commission ("SEC") filings. These risks have been and may be further impacted by any future public health risks. Accordingly, these forward-looking statements do not constitute guarantees of future performance, and you are cautioned not to place undue reliance on these forward-looking statements. Risks regarding our business are described in detail in our SEC filings which are available on the SEC's website at www.sec.gov, including in Citius Oncology's Annual Report on Form 10-K for the year ended September 30, 2025, filed with the SEC on December 23, 2025. These forward-looking statements speak only as of the date hereof, and we expressly disclaim any obligation or undertaking to release publicly any updates or revisions to any forward-looking statements contained herein to reflect any change in our expectations or any changes in events, conditions or circumstances on which any such statement is based, except as required by law.

Investor Contact:
Ilanit Allen
ir@citiuspharma.com
908-967-6677 x113

Media Contact:
STiR-communications
Greg Salsburg
Greg@STiR-communications.com 

-- Financial Tables Follow –

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SOURCE Citius Oncology, Inc.