Avalo Therapeutics Reports First Quarter 2026 Financial Results and Recent Business Updates

• Achieved positive topline results in Phase 2 LOTUS trial of abdakibart in moderate to severe hidradenitis suppurativa (HS) and plan to advance into a registrational phase 3 program

• Completed public offering of equity securities for gross proceeds of$431.3 million

• Cash, cash equivalents, and short-term investments of $82 million as of March 31, 2026, not including the subsequent financing

WAYNE, Pa., May 13, 2026 (GLOBE NEWSWIRE) -- Avalo Therapeutics, Inc. (Nasdaq: AVTX) (“Avalo”), a clinical stage biotechnology company fully dedicated to developing IL-1β-based treatments for immune-mediated inflammatory diseases, today announced business updates and first quarter 2026 financial results.

“The positive Phase 2 LOTUS trial results of abdakibart in HS, which demonstrated a deep and consistent clinical response across both HiSCR75 and HiSCR50 endpoints, mark the beginning of a transformative period for Avalo,” said Garry Neil, MD, Chief Executive Officer of Avalo. “With our recently secured financing, Avalo is well-positioned to advance abdakibart into a registrational phase 3 program. Our focus remains on delivering this innovative mechanism of action via a patient-friendly potential monthly dosing regimen to provide a much-needed new treatment option for those living with HS.”

• On May 5, 2026, Avalo reported positive topline Phase 2 LOTUS results for abdakibart in adults with moderate to severe HS. The trial successfully met its primary endpoint at both doses studied (p=0.018 150mg, p=0.015 300mg and p=0.004, combined), demonstrating a 42.2% and 42.9% absolute improvement in HiSCR75 response rates at Week 16, respectively (42.5% combined; placebo rate 25.6%). These results represented the highest absolute improvement in HiSCR75 and HiSCR50 reported in similarly sized (or larger) HS trials at each individual dose and on a combined dose basis. Abdakibart also demonstrated statistically significant benefit across the key secondary endpoints, including HiSCR50, change in IHS4, and change in draining tunnel count.

• On May 7, 2026, Avalo completed an underwritten public offering of its common stock and pre-funded warrants to purchase shares of common stock for gross proceeds of $431.3 million.

• On April 26, 2026, Avalo entered into a Milestone Buyout Option and Amendment Agreement related to its March 2024 acquisition of AlmataBio, Inc. Under the agreement, Avalo paid the former AlmataBio securityholders $2.25 million for an option, exercisable within 90 days of the effective date, to pay $5.125 million in cash or shares of Avalo common stock (or a combination) in lieu of the previously disclosed $15 million contingent milestone payment due upon dosing the first patient in a Phase 3 trial of abdakibart.

• Cash, cash equivalents and short-term investmentswere $82.0 million as of March 31, 2026. Net cash used in operating activities was $17.7 million for the three months ended March 31, 2026. Subsequent to March 31, 2026, the Company completed an underwritten public offering of its common stock and pre-funded warrants for net proceeds of approximately $405.0 million. Our current cash, cash equivalents, and short-term investments are expected to fund operations into 2029.

• Research and development expenseswere $14.0 million for the three months ended March 31, 2026, an increase of $4.9 million from the prior year, driven by costs related to and supporting the Phase 2 LOTUS trial.

• General and administrative expenseswere $6.9 million for the three months ended March 31, 2026, an increase of $1.3 million from the prior year, primarily driven by headcount additions and stock-based compensation expense.

• Net losswas $19.6 million for the three months ended March 31, 2026, as compared to net loss of $13.1 million for the three months ended March 31, 2025. The difference was driven by a $6.2 million increase in operating expenses due to the $4.9 million increase in research and development expenses, as discussed above, and $1.3 million increase in general and administrative expenses, as discussed above. Basic and diluted net loss per share was $0.98 and $1.25 for the three months ended March 31, 2026 and 2025, based on 20,106,925 and 10,514,901 weighted average common shares outstanding, respectively.

(In thousands, except share and per share data)

The consolidated balance sheets as of March 31, 2026 and December 31, 2025 have been derived from the reviewed and audited financial statements, respectively, but do not include all of the information and footnotes required by accounting principles accepted in the United States for complete financial statements.

(In thousands, except per share data)

The consolidated statements of operations for the three months ended March 31, 2026 and 2025 have been derived from the reviewed financial statements, but do not include all of the information and footnotes required by accounting principles generally accepted in the United States for complete financial statements.

Avalo Therapeutics is a clinical stage biotechnology company fully dedicated to developing IL-1β-based treatments for immune-mediated inflammatory diseases. Our lead asset, abdakibart, is an anti-IL-1β monoclonal antibody (mAb). Positive topline data was recently reported for abdakibart in a Phase 2 clinical trial in hidradenitis suppurativa (HS). We’re also exploring additional opportunities to make an impact in prevalent indications that have significant remaining unmet needs. For more information about Avalo, please visit www.avalotx.com.

Abdakibart is a humanized monoclonal antibody (IgG4) that binds to interleukin-1β (IL-1β) with high affinity and neutralizes its activity. IL-1β is a pro-inflammatory cytokine that plays a central role in the pathogenesis of a wide range of human diseases.1 It activates immune cells that generate proinflammatory cytokines, including IL-6, TNF-α, and IL-17. Dysregulated IL-1β signaling is a major driver of inflammation, contributing to the progression of autoimmune disorders. IL-1β inhibition has proven effective in multiple immune-mediated inflammatory diseases.1-3

The LOTUS trial was a randomized, double-blind, placebo-controlled, parallel-group Phase 2 trial with two dose regimens to evaluate the efficacy, safety and tolerability of abdakibart in approximately 250 adults with moderate to severe hidradenitis suppurativa. Subjects were randomized (1:1:1) to receive either one of two dosing regimens of abdakibart or placebo during a 16-week treatment phase. The primary efficacy endpoint is the proportion of subjects achieving Hidradenitis Suppurativa Clinical Response (HiSCR75) at Week 16. Secondary objectives include but are not limited to: the proportion of patients achieving HiSCR50 and HiSCR90 as well as change from baseline in: International HS Severity Score System (IHS4), draining tunnel count, abscess and inflammatory nodule (AN) count, and patients achieving at least a 30% reduction on a numerical rating scale in Patient's Global Assessment of Skin Pain (PGA Skin Pain). For additional information this trial (NCT06603077), please visit www.clinicaltrials.gov or www.lotustrial.com.

Hidradenitis suppurativa (HS) is a chronic, progressive, often debilitating inflammatory skin disease that causes painful nodules, abscesses, and tunnels to form under the skin.4-6,8Areas commonly affected by HS include the nape of the neck, breasts, chest, armpits, abdomen, buttocks and anus, groin and genitals, and inner thighs.7If not adequately and promptly treated, the chronic inflammation characteristic of HS may progress to tissue destruction and permanent scarring.4-6,9HS typically first presents in late adolescence or early adulthood and is estimated to affect 0.7–1.2% of the U.S. population, though some sources suggest the prevalence may be as high as 2–4%.10,11,12

References:1Dinarello CA. Immunol Rev. 2018;281(1):8-27.2Kany S et al. Int J Mol Sci. 2019;20(23):6008.3Kimball AB et al. Presented at: American Academy of Dermatology; March 8-12, 2024; San Diego, CA.4Diaz MJ, et al. Curr Iss Mol Bio. 2023;45:4400-4415.5Agnese ER, et al. Cureus. 2023;15(11):e49390.6de Oliveira ASLE, et al. Biomolecules. 2022;12(10):1371.7Ingram JR, et al. J Eur Acad Dermatol Venereol. 2022;36(9):1597-160.8Sabat R, et al. The Lancet. 2025;405(10476):P420-438.9Jemec GB. Clinicalpractice. Hidradenitis suppurativa. N Engl J Med. 2012;366(2):158–164.10Garg A, Kirby JS, Lavian J, Lin G, Strunk A. Sex- and Age-Adjusted Population Analysis of Prevalence Estimates for Hidradenitis Suppurativa in the United States. JAMA Dermatol. 2017;153(8):760–764. doi:10.1001/jamadermatol.2017.0201.11Ingram, John R.British Journal of Dermatology. doi:10.1111/bjd.19435.12Nguyen TV, et al. J Eur Acad Dermatol Venereol. 2021;35(1):50-61.

This press release includes forward-looking statements made pursuant to the Private Securities Litigation Reform Act of 1995 and other federal securities laws. Forward-looking statements are statements that are not historical facts. Such forward-looking statements are subject to significant risks and uncertainties that are subject to change based on various factors (many of which are beyond our control), which could cause actual results to differ from the forward-looking statements. Such statements may include, without limitation, statements with respect to our plans, objectives, projections, expectations and intentions and other statements identified by words such as “projects,” “may,” “might,” “will,” “could,” “would,” “should,” “continue,” “seeks,” “aims,” “predicts,” “believes,” “expects,” “anticipates,” “estimates,” “intends,” “plans,” “potential,” or similar expressions (including their use in the negative), or by discussions of future matters such as: therapeutic potential, clinical benefits and safety profiles of abdakibart (AVTX-009); plans to advance abdakibart into a registrational phase 3 program; expectations regarding timing, success and data announcements of ongoing preclinical studies and clinical trials; drug development costs, reliance on investigators and enrollment of patients in clinical trials; and our plans to develop and commercialize our current and any future product candidates and the implementation of our business model and strategic plans for our business.

Any forward-looking statements are based on management’s current expectations and beliefs and are subject to a number of risks, uncertainties and important factors that may cause actual events or results to differ materially from those expressed or implied by any forward-looking statements including, without limitation, risks associated with: the timing and anticipated results of our current and future preclinical studies and clinical trials, supply chain, strategy and future operations; the delay of any current and future preclinical studies or clinical trials or the development of our product candidates; the risk that the results of prior preclinical studies and clinical trials may not be predictive of future results in connection with current or future preclinical studies and clinical trials, including those for abdakibart; the risk that cross-trial comparisons may not be reliable as no head-to-head trials of abdakibart have been conducted; the timing and outcome of any interactions with regulatory authorities; obtaining, maintaining and protecting our intellectual property; the availability of funding sufficient for our operating expenses and capital expenditure requirements, reliance on key personnel; regulatory risks; general economic and market risks and uncertainties, including those caused by the war in Ukraine and the Middle East; and those other risks detailed in our filings with the Securities and Exchange Commission, available at www.sec.gov. We may not actually achieve the plans, intentions or expectations disclosed in our forward-looking statements, and you should not place undue reliance on our forward-looking statements. In addition, any forward-looking statements represent our view only as of today and should not be relied upon as representing its views as of any subsequent date. You should not rely upon forward-looking statements as predictions of future events and actual results or events could differ materially from the plans, intentions and expectations disclosed herein. Except as required by applicable law, we expressly disclaim any obligations or undertaking to release publicly any updates or revisions to any forward-looking statements contained herein to reflect any change in our expectations with respect thereto or any change in events, conditions or circumstances on which any statement is based.