L'Air Liquide S.A. (AI.DE) is a French multinational industrial gases company that designs, engineers, manufactures and supplies industrial, medical and specialty gases along with related technologies and services to customers worldwide; it operates through three principal segments comprising Gas & Services offering oxygen, nitrogen, hydrogen, argon, rare gases, helium, carbon dioxide and acetylene for applications in large industries including chemicals, energy, steel and refining as well as industrial merchant activities for small and medium enterprises in sectors such as food processing, metals and glass, healthcare providing medical gases like oxygen therapy, anesthetics and nitric oxide mixtures for hospitals and home care, Electronics supplying ultra-high purity carrier gases and precursors for semiconductors and displays, and Global Markets & Technologies focusing on hydrogen energy, biogas, space and clean transport solutions; Engineering & Construction designs and builds gas production plants and related infrastructure. Founded in 1902 and headquartered in Paris, the company conducts operations across more than 80 countries with approximately 67,000 employees and maintains the world's longest pipeline network exceeding 9,000 kilometers for on-site gas delivery. Recent developments include the August 2025 agreement to acquire South Korea's DIG Airgas for 2.85 billion euros to bolster its Asian electronics market presence, a March 2024 partnership with Royal Vopak for ammonia import and hydrogen infrastructure in Singapore, a January 2024 50-50 joint venture with TotalEnergies for heavy-duty vehicle hydrogen supply in Europe, a February 2024 long-term virtual power purchase agreement with Statkraft for renewable energy, a 130 million euro investment under new long-term contracts for carrier gases production units announced in Q3 2025, a 50 million dollar commitment to upgrade hydrogen pipeline systems, up to 850 million dollars for expanding air separation unit capacities to meet industrial demand, ongoing Q2 2025 financial results showing 2% comparable sales growth and 10.3% recurring net profit increase driven by sustainability initiatives, and a March 2024 divestiture of 12 subsidiaries in West and Central Africa plus the Indian Ocean to Adenia Partners while securing long-term supply contracts.