Spanish Intoplane Services, S.L., commonly known as SIS, is a specialized provider of into-plane fueling services in the Spanish aviation sector. The company focuses on the direct supply of aviation fuel to aircraft on the apron at airports, handling operations that ensure precise, safe, and timely refueling for commercial and other flights.
Its core activities include the acquisition, storage, transport, and sale of aviation kerosene, lubricants, and related products necessary for aircraft maintenance and operations. SIS has historically operated at Adolfo Suárez Madrid-Barajas Airport, one of Spain's busiest hubs, delivering fuel to major airlines.
Based in Madrid, the company was previously a wholly owned subsidiary of Moeve, the international energy company formerly known as Cepsa. In October 2026, Skytanking Holding GmbH acquired a 50 percent stake, establishing a 50/50 joint venture. This structure combines Moeve's expertise in aviation fuel supply with Skytanking's global operational experience across more than 140 airports in 17 countries.
The joint venture positions SIS to pursue growth opportunities throughout mainland Spain and the Balearic Islands, particularly in upcoming tenders by airport operator Aena. It also supports the broader adoption of sustainable aviation fuels (SAF). As a medium-sized enterprise with dozens of employees, SIS plays a key role in Spain's airport fueling infrastructure, competing alongside other players in the into-plane services market.
Also known as Spanish Intoplane Services, S.L. and Intoplane Services.
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Robust operations and refining raised product volumes; large Spain-focused capex ramp-up for energy transition; net debt fell to €2.1bn; construction begun on Europe’s largest green hydrogen project.
