Announcement • Jun 15
XBiotech Launches Phase II Clinical Trial Evaluating Vilamakitug For The Treatment Of Active Axial Spondyloarthritis XBiotech announced that its Investigational New Drug (IND) application for V-SPINE (PT064), a Phase II, double-blind, placebo-controlled, randomized study evaluating the efficacy and safety of vilamakitug in participants with active axial spondyloarthritis, has successfully completed the U.S. Food and Drug Administration’s (FDA) 30-day review period without a clinical hold. The study is now authorized to proceed with patient enrollment in the United States, marking the resumption of XBiotech’s rheumatology program. The clinical protocol was developed under the leadership of Study Chair Marina Magrey, M.D., and with expert guidance from a distinguished panel of SPARTAN leaders and rheumatology experts. PT064 will evaluate 400 mg of vilamakitug administered as 16 weekly subcutaneous injections versus placebo in 150 adult participants with active axial spondyloarthritis (axSpA). The primary endpoint is the proportion of participants achieving an ASAS40 response at Week 16. The study also includes a 12-week open-label extension in which all participants receive vilamakitug. Despite the availability of approved biologic therapies, a substantial proportion of patients continue to experience inadequate disease control, representing a significant and persistent unmet medical need. Vilamakitug (also known as XB2001 and Natrunix™) is an IgG4 monoclonal antibody that neutralizes interleukin-1a (IL-1a), a proximal pro-inflammatory cytokine that can contribute to synovial and entheseal inflammation, osteoclast-mediated bone resorption, cartilage degradation, and inflammatory joint pain in spondyloarthritis. By targeting this upstream inflammatory mediator, vilamakitug is hypothesized to reduce both structural damage and disease activity, including in patients who have had an inadequate response to currently approved biologic therapies. New Risk • Jan 19
New minor risk - Share price stability The company's share price has been volatile over the past 3 months. It is more volatile than 75% of American stocks, typically moving 11% a week. This is considered a minor risk. Share price volatility indicates the stock is highly sensitive to market conditions or economic conditions rather than being sensitive to its own business performance, which may also be inconsistent. It also increases the risk of potential losses in the short term as the stock tends to have larger drops in price more frequently than other stocks. Currently, the following risks have been identified for the company: Major Risks Earnings have declined by 71% per year over the past 5 years. Revenue is less than US$1m. Minor Risks Share price has been volatile over the past 3 months (11% average weekly change). Market cap is less than US$100m (US$78.4m market cap). 
