Stellum Capital, through its vehicle Stellum Growth I, has acquired a majority stake in Laboratorios Bilper, with the goal of driving its international expansion. The Basque company, located in Zamudio, specializes in the development and manufacturing of hygiene, cosmetic, and biocidal products for pets, veterinary medicines, as well as other chemical products for domestic and industrial use.
With a workforce of around 50 employees, Laboratorios Bilper markets its solutions and products for dogs, cats, birds, reptiles, horses, and small animals in more than 60 countries, under the brands ‘Menforsan’, ‘Megusta’, and ‘Bacterisan’.
With Stellum Growth’s support, the company will accelerate the development of new markets and double its business volume within five years. To achieve this, it will rely on its portfolio of proprietary brands, strengthen its production capacity, and leverage growth alongside strategic customers.
Founded in 1958, Laboratorios Bilper has been led in recent decades by Óscar Mesanza, who will remain a shareholder and continue to participate in the company’s strategic decision-making.
The Basque company stands out in the market for its commitment to innovation and technological development—areas to which it allocates 20% of its turnover—its industrial flexibility, and reliability in third-party production. Likewise, Laboratorios Bilper has advanced industrial processes and a culture of continuous improvement, positioning it as a benchmark in quality, efficiency, and sustainability within its field. In recent years, the company has also accelerated its growth by expanding into new channels and international markets.
According to Óscar Mesanza, Managing Director of Bilper, “Stellum Capital’s entry represents an important endorsement to strengthen our industrial project. From the beginning of the discussions, the affinity and trust with the Stellum team were decisive factors in choosing them as strategic partners.”
Pablo Baroja, Managing Partner of Stellum Growth, stated that “Bilper combines a distinctive positioning in a sector with strong tailwinds—driven by pet humanization and increased household spending—with a flexible industrial capacity that is difficult to replicate. Its management team has demonstrated outstanding execution, and the company’s solid track record and strong market presence further reinforce a future full of opportunities.”
Meanwhile, Pedro Gortázar, Investment Director of Stellum Growth, added, “During our visits to the facilities, we confirmed that Bilper is fully prepared for growth, with industrialized processes, the ability to handle both short and long production runs, and a structure designed to support higher volumes. Our focus will be to drive its internationalization and expand its product range into higher value-added categories, always respecting its culture and values.”
EY and Jon Álvarez advised the company on the transaction. KPMG provided corporate advisory services to the buyer and conducted the due diligence process. Rocío Cruces Torres provided legal advice to the buyer.
About Laboratorios Bilper
Laboratorios Bilper is a Basque company based in Zamudio, specialized in the development and manufacturing of hygiene, cosmetic, and biocidal products for pets, as well as other chemical products for domestic and industrial use.
About Stellum Growth I
Stellum Growth I is a private equity fund managed by Stellum Capital and promoted by Fundación Artizarra. It focuses mainly on the Basque Country and Navarra and takes stakes in companies from various sectors with the aim of helping them develop and implement their growth plans through active participation in management. Laboratorios Bilper is the seventh investment by Stellum Growth I, following investments in Coover (formerly Envaplaster), EPER Metallic Solutions, Tecnimoem, AIBLU (formerly Infoma Consulting), USA Group, and Begas. For more information, visit Stellum Capital’s website: www.stellumcapital.com
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