Spanish company Atelco, which specializes in the deployment and maintenance of fiber-optic networks, has filed for bankruptcy protection after losing one of its major contracts with telecoms giant Telefónica.

The company was forced to initiate bankruptcy proceedings following the expiration of a network maintenance contract with Telefónica that accounted for a significant portion of its business. The loss of the contract reportedly worsened its financial situation to the point where continuing operations under current conditions was no longer viable.

For years, Atelco has been one of the contractors responsible for deploying, maintaining, and operating fiber-optic networks for Telefónica in various regions of Spain.

This case reflects the difficulties faced by many engineering and services companies that work for major telecommunications operators. After years of intense expansion of FTTH networks, the market has entered a phase of greater maturity, with lower deployment volumes and growing pressure on operating and maintenance costs.

In this context, the renewal or loss of a high-volume contract can have a decisive impact on highly specialized companies whose business depends on a small number of clients.