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 center of the allegations is Servinabar 2000, a company owned and managed by Alonso. Investigators believe the company played a significant role in a network connecting business interests, political intermediaries, and individuals linked to public procurement contracts currently under scrutiny.
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 key element of this second investigation is the so-called Hirurok group. According to investigators, the group may have used political connections and institutional influence to obtain economic advantages and shape administrative decisions. Authorities suspect that Servinabar may have served as a vehicle through which part of the group’s alleged profits were channeled.
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, no final criminal conviction has been issued against Alonso in relation to any of the matters under investigation. However, from a reputational perspective, the damage has already been substantial. His name has become associated with alleged kickback schemes, controversial public contracts, business ties to key figures in the Koldo case, and investigations into possible political and economic influence networks.
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.
