Ignis may need to rethink the timing of its stock market debut if Spain approves its planned data centre rules. The renewable energy company plans to raise €500 million in new capital at an estimated combined valuation of €1.5 billion. Its basic pitch to investors is a portfolio of power connections built for digital infrastructure.
The draft real decreto could reach the Council of Ministers in October, while Ignis is still placing shares with investors. It does not need parliamentary approval. Spanish media reports say the public consultation ended on 10 September 2026 after hundreds of observations. The draft still needs a mandatory report from the National Markets and Competition Commission, or CNMC, before final approval. Investment bankers consulted by this newspaper say the prospect of changing the rules for data centre connections is enough to unsettle a debut planned for late October or early November.
“Investors prefer not to play until the rules are clear,” said one investment banker familiar with the process. The uncertainty has reached financial centres in London and New York as meetings with investors continue in Europe and the United States.
The exposure is unusually direct. Ignis Energy Holdings has earned much of its recent income by creating and selling companies whose basic asset is the right to connect a data centre to the electricity grid. In February 2025, it sold Ignis Data Kappa for €42.6 million. The subsidiary held a 137-megawatt self-consumption connection right. In May, the group sold Gamma. Together, the two deals produced €53.5 million in capital gains, equal to 92% of the parent company's reported profit that year.
That business model depends on a scarce asset.
Spain's electricity system has few places where large consumers can connect. A project must obtain an access and connection permit from Red Eléctrica or the relevant local distributor. The process can take years and depends on available capacity. In the Community of Madrid, where demand for digital infrastructure is concentrated, little capacity remains. Ignis has spent a decade securing these rights.
The company usually places the permit inside a separate subsidiary. Depending on the project, that company may also hold the land and the renewable plant meant to supply the data centre. When a developer arrives, Ignis sells the company instead of transferring the permit alone. It can stay involved by building lines and substations. It may also supply power through long-term PPAs, manage batteries or operate the facilities.
Spain DC, whose members include Amazon and Microsoft, as well as Google, says three developers are ready to abandon projects if the decree passes in its current form. The proposal would apply to data centres with grid connection capacity of at least 1 megawatt. Operators would have to cover at least 80% of hourly consumption with newly generated renewable electricity and meet additional energy- and water-efficiency requirements, including the highest efficiency category. The operator would also have to be established in the European Union. RTVE's reporting on the draft identifies the hourly renewable-energy rule and environmental efficiency conditions as central parts of the proposal.
The draft ties those obligations directly to grid access. Projects that are not yet connected would have six months to prove compliance. Failure could lead to their permits expiring and any attached guarantees being enforced.
That changes the value of the asset Ignis is offering investors. A connection right that once stood mostly on its own would now depend on what the eventual buyer does with the project. Ignis argues the regulation could instead strengthen its pitch: hourly renewable consumption requires nearby generation, batteries and a permanent supply contract.
Ignis has reached an agreement with the French group Engie to protect revenues from a portfolio of storage projects in Spain. It also reports 1.9 gigawatts secured in locations with limited grid access, including 1.2 gigawatts in Madrid. The company says 250 megawatts have already been sold to data centres. The investor sensitivity seen in earlier economic analysis is sharper here because a new rule could affect an asset's value before the buyer even connects it.
Ignis has declined to comment. Citi, Morgan Stanley and Santander are global coordinators in its banking line-up. BBVA, CaixaBank and UBS are next, followed by Alantra, Berenberg, JB Capital and Sabadell. The company has also sold its electricity and gas retailer to Engie. That business had more than 50,000 customers and accounted for 62% of revenue in 2024. Consolidated revenue for 2025 fell to €145 million after the sale.
The government is trying to bring order to a sector competing for scarce grid capacity. Regional authorities have also raised concerns. The government of Castilla-La Mancha submitted ten amendments seeking a balance between environmental standards and legal certainty for investments already at an advanced stage. For Ignis, the risk extends beyond a tougher technical standard: a permit could lose value if its buyer cannot meet the new conditions. Until the final wording is known, the draft leaves the IPO exposed to uncertainty that investors are reluctant to price.
