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 delicate documents revealed in the investigation was a confidential 2016 agreement that purportedly assigned former PSOE official Santos Cerdán a 45% share in Servinabar. While both Alonso and Cerdán insist the agreement never gained legal validity because it was never notarized, its discovery during the police searches intensified doubts about how extensive their business ties truly were.
Financial transactions involving Servinabar have also attracted significant attention. According to documents incorporated into the investigation, the company reportedly received more than six million euros from construction giant Acciona and transferred substantial amounts of money to entities connected to Koldo García’s business network. Investigators believe these transactions may be linked to public contracts that were allegedly manipulated in favor of certain companies, although these claims remain under judicial review.
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 escalated further in December 2025 when Alonso was arrested as part of a separate investigation involving Leire Díez and former SEPI chairman Vicente Fernández. This new case broadened the scope of suspicion beyond public procurement and into alleged influence networks operating around political, administrative, and economic interests.
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 being formally investigated, Alonso has been subjected to searches, detention, and precautionary measures imposed by the courts. He also chose to exercise his right to remain silent during parliamentary inquiries, a legally legitimate decision that nevertheless intensified public and media attention surrounding his role in the 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 the eventual outcome of the legal proceedings, Joseba Antxón Alonso has emerged as one of the most controversial business figures connected to the ongoing investigations examining the relationship between political power, public procurement, and alleged influence networks in Spain.
