Equillium Reports Fourth Quarter and Full Year 2025 Financial Results and Recent Corporate and Clinical Highlights

Initiation of Phase 1 proof-of-mechanism study of EQ504 planned for mid-2026, with data expected approximately six months thereafter

Cash and cash equivalents, inclusive of the March 2026 financing, expected to fund operations into 2029

LA JOLLA, Calif, March 25, 2026(GLOBE NEWSWIRE)--Equillium, Inc. (Nasdaq: EQ), a clinical-stage biotechnology company leveraging a deep understanding of immunobiology to develop novel therapeutics to treat severe autoimmune and inflammatory disorders, today announced financial results for its fourth quarter and fiscal year ended December 31, 2025.

“2025 was a transformative year as we sharpened our strategic focus on EQ504 and strengthened our financial position to support its advancement into the clinic,” said Bruce Steel, Chief Executive Officer of Equillium. “Our financing in August 2025 of up to $50 million, together with our recently completed $35 million financing, further reinforces confidence in our strategy and provides the resources to efficiently execute our EQ504 clinical development plan. With operating runway expected into 2029, we are well-positioned to advance EQ504’s differentiated, non-immunosuppressive approach targeting the AhR pathway to address significant unmet needs across inflammatory diseases, and we believe it has the potential to be a best-in-class oral therapy in ulcerative colitis (UC), with additional opportunities across gastrointestinal (GI) and inflammatory lung diseases.”

Revenuefor the fourth quarter of 2025 was $0, compared with $4.4 million for the same period in 2025. For the full year of 2025, there was no revenue recognized, compared with $41.1 million under the Asset Purchase Agreement with Ono Pharmaceutical for the full year of 2024.

Research and development (R&D) expensesfor the fourth quarter of 2025 were $1.5 million, compared with $7.3 million for the same period in 2024. For the full year of 2025, R&D expenses were $12.8 million, compared with $37.4 million for the full year of 2024. The significant year-over-year decrease in R&D expenses was primarily driven by the wind down of our clinical studies in 2025.

General and administrative (G&A) expensesfor the fourth quarter of 2025 were $2.4 million, compared with $1.8 million for the same period in 2024. For the full year of 2025, G&A expenses were $10.8 million, compared with $11.9 million for the full year of 2024. The year-over-year decrease was primarily driven by lower general overhead expenses.

Net lossfor the fourth quarter of 2025 was $3.8 million, or $(0.04) per basic and diluted share, compared with a net loss of $5.8 million, or $(0.16) per basic and diluted share for the same period in 2024. Net loss for the full year of 2025 was $22.4 million, or $(0.39) per basic and diluted share, compared with a net loss of $8.1 million, or $(0.23) per basic and diluted share for the full year of 2024. The increase in net loss for the year-over-year period was primarily due to lower revenue, partially offset by lower operating expenses.

Cash, cash equivalents and short-term investmentstotaled $30.3 million as of December 31, 2025, compared to $22.6 million as of December 31, 2024. Equillium believes that its cash and cash equivalents on the balance sheet as of December 31, 2025, together with the recently completed financing of $35 million in March 2026, are capable of funding its currently planned operations into 2029, based on certain assumptions and estimates that may prove to be inaccurate.

About EQ504EQ504 is an investigational potent and selective aryl hydrocarbon receptor (AhR) modulator with a multi-modal, non-immunosuppressive mechanism of action designed to be complementary to other inflammation and immunology agents. AhR is critical to barrier organ tissue physiology and immunology, maintaining barrier function and promoting tissue repair and regeneration, while regulating resident immune cells with anti-inflammatory responses. EQ504’s preclinical properties provide the potential for targeted, local delivery via enteric coating for the treatment of ulcerative colitis and other gastrointestinal diseases or inhaled formulations for the treatment of inflammatory lung diseases.

About EquilliumEquillium is a clinical-stage biotechnology company leveraging a deep understanding of immunobiology to develop novel therapeutics to treat severe autoimmune and inflammatory disorders with high unmet medical need. The company’s pipeline consists of several novel immunomodulatory assets and product platform targeting immuno-inflammatory pathways.

For more information, visitwww.equilliumbio.com.

Forward Looking StatementsStatements contained in this press release regarding matters that are not historical facts are “forward-looking Statements” within the meaning of the Private Securities Litigation Reform Act of 1995. Forward-looking statements may be identified by the use of words such as “anticipate”, “believe”, “could”, “continue”, “expect”, “estimate”, “may”, “plan”, “outlook”, “future”, “potential” and “project” and other similar expressions that predict or indicate future events or trends or that are not statements of historical matters. These statements include, but are not limited to, statements regarding Equillium’s expectation that thecash and cash equivalents on its balance sheet as of December 31, 2025, together with the recently completed financing of $35 million in March 2026, are capable of funding its currently planned operations into 2029;Equillium’s ability to efficiently execute or advance its EQ504 clinical development plan; the potential benefits of Equillium’s product candidates; and other statements that are not historical facts. These statements are based on Equillium’s current plans, objectives, estimates, expectations and intentions, are not guarantees of future performance and inherently involve significant risks and uncertainties. Because such statements are subject to risks and uncertainties, many of which are outside of Equillium’s control, actual results may differ materially from those expressed or implied by such forward-looking statements. Risks that contribute to the uncertain nature of the forward-looking statements include, but are not limited to: market conditions; volatility in the trading price of Equillium’s common stock; the sufficiency of Equillium’s capital resources and need for additional capital to achieve its goals; Equillium’s ability to raise additional capital on terms acceptable to Equillium, or at all; Equillium’s ability to continue as a going concern; risks inherent in achieving clinical milestones and stock price thresholds; Equillium’s ability to initiate or progress a Phase 1 clinical study, or any clinical trials, or the ability of such Phase I clinical study or any clinical trials to generate favorable data, on the anticipated timelines, if at all; Equillium’s ability to execute its plans and strategies; risks related to performing clinical and pre-clinical studies, if and when initiated; whether the results from clinical and pre-clinical studies will validate and support the safety and efficacy of Equillium’s product candidates; changes in the competitive landscape; and changes in Equillium’s strategic plans. The foregoing list of risk factors is not exhaustive.These and other risks and uncertainties are described more fully under the caption "Risk Factors" and elsewhere in Equillium's filings and reports with the Securities and Exchange Commission (SEC), which may be accessed for free by visiting the SEC’s website at www.sec.gov,and on Equillium’s website under the heading “Investors.” Investors should take such risks into account and should not rely on forward-looking statements when making investment decisions. All forward-looking statements contained in this press release speak only as of the date on which they were made. Equillium undertakes no obligation to update such statements to reflect events that occur or circumstances that exist after the date on which they were made, except as required by law.