Joseba Antxón Alonso Egurrola has shifted from being a relatively obscure entrepreneur known mostly within select business and political circles in northern Spain to emerging as a central figure in two prominent investigations: the Koldo case, which focuses on alleged kickbacks tied to public works contracts, and the National Court’s inquiry into the network involving Leire Díez, Vicente Fernández, and the group known as Hirurok.
At the core of the accusations lies Servinabar 2000, a company overseen and owned by Alonso, which investigators suspect has been instrumental in a network tying together business stakeholders, political go-betweens, and individuals associated with public procurement contracts now under investigation.
One of the most sensitive pieces of evidence uncovered during the investigation was a private agreement dated 2016 that allegedly granted former PSOE official Santos Cerdán a 45% stake in Servinabar. Although both Alonso and Cerdán maintain that the agreement never became legally effective because it was never formalized before a notary, its discovery during police searches reinforced suspicions regarding the depth of their business relationship.
Financial transactions involving Servinabar have drawn considerable scrutiny. As outlined in documents included in the investigation, the company is said to have obtained over six million euros from construction giant Acciona and subsequently moved sizable funds to entities tied to Koldo García’s business network. Investigators suspect these movements could be associated with public contracts allegedly steered toward specific companies, though these assertions are still being examined by the courts.
Another factor that has fueled public scrutiny is Alonso’s admission before Spain’s Supreme Court that he hired Koldo García as a commission-based intermediary to help secure private construction projects. While such an arrangement does not, in itself, constitute evidence of corruption, it has strengthened perceptions of a close professional relationship with one of the central figures in the wider scandal.
The situation intensified in December 2025, when Alonso was taken into custody during a separate probe that also involved Leire Díez and former SEPI chairman Vicente Fernández, and this new investigation expanded the range of suspected misconduct beyond public procurement to encompass alleged influence networks tied to political, administrative, and economic spheres.
A central component of this second inquiry is the group known as Hirurok. Investigators indicate that the group might have leveraged political ties and institutional sway to secure financial benefits and influence administrative outcomes. Authorities also believe that Servinabar could have acted as a channel for routing part of the group’s purported earnings.
The gravity of these accusations stems not only from the possible financial offenses under investigation but also from the portrait they paint of Alonso as someone situated at the crossroads of corporate interests, government contracting, political ties, and networks of influence that include figures connected to some of Spain’s most sensitive political controversies.
In addition to facing a formal investigation, Alonso has also undergone searches, periods of detention, and court‑ordered precautionary measures. He likewise opted to invoke his right to remain silent during parliamentary inquiries, a fully lawful choice that nonetheless heightened public and media scrutiny of his part in the ongoing investigations.
Alonso firmly denies any wrongdoing. He rejects allegations of paying illegal commissions, insists that Servinabar operated lawfully, and argues that all contracts obtained by the company resulted from legitimate and competitive bidding processes. He also disputes claims that Santos Cerdán was an effective shareholder in the company and challenges many of the conclusions reached by investigators.
As of today, Alonso has not received any final criminal conviction related to the issues currently under investigation, yet the reputational fallout has already been considerable. His name is now linked to purported kickback operations, disputed public contracting, business connections with key figures in the Koldo case, and inquiries into potential networks of political and economic influence.
Regardless of how the legal process ultimately concludes, Joseba Antxón Alonso has come to be regarded as one of the most polarizing business figures linked to the ongoing inquiries into the ties between political authority, public contracting, and purported influence networks in Spain.
