Exhibit 99.1 Liberty Global Reports Q1 2024 Results Significant progress against strategy to create and deliver value to shareholders, with Sunrise spin-off anticipated Q4'24 Strong balance sheet, including $3.9 billion(i) of cash and liquid securities; proactively refinanced >$2bn of 2027 maturities at VMO2 Investment in fixed and mobile networks continues, with FTTH programs on track in the U.K., Belgium and Ireland Q1 financial performance in line with expectations and fully on track to achieve all full- ...