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Mars Reinforces Commitment to European Manufacturing with Major Investment in Slough Factory

Mars, Incorporated has recently reaffirmed its dedication to European manufacturing with a substantial £190 million investment aimed at modernizing its historic chocolate factory located in Slough, UK. This investment is part of a larger initiative to allocate €1 billion across the European Union, announced in September 2025, confirming the company’s intent to enhance its operational capabilities and manufacturing efficiency in Europe.

The Slough factory, renowned as the birthplace of the iconic Mars Bar since 1932, plays a pivotal role in the company's European framework. It not only caters to the UK market but also acts as a significant exporter, with exports including over 2.7 million kilograms of chocolate to Ireland and more than 12.3 million kilograms to the Netherlands in 2025. This illustrates the factory's vital contribution to Mars's interconnected European operations.

The planned upgrades at the Slough site include the introduction of cutting-edge manufacturing technologies, integrating robotics and artificial intelligence alongside enhanced machinery. This modernization effort aims to incorporate advanced cooling systems and energy-efficient utilities, which will collectively improve both performance and sustainability at the factory. Additionally, Mars intends to implement digital twin technology, utilizing AI-driven data analytics to optimize production processes, ensuring product consistency, and minimizing waste.

Moreover, the investment will facilitate the upskilling of the workforce, providing new pathways into advanced engineering, process automation, and data-driven manufacturing roles. This initiative emphasizes Mars's commitment to ensuring that its employees are well-equipped with the necessary skills for the future of manufacturing in an innovative environment. Adam Grant, General Manager of Mars Snacking UKI, stated, "This investment reflects our confidence in the UK as a hub to manufacture and innovate. We are ensuring our operations remain competitive and prepared for the future."

Acknowledging the significance of the investment, Peter Kyle, the UK’s Business and Trade Secretary, highlighted it as a strong indicator of confidence in the UK’s manufacturing landscape. The Slough factory, which has a rich production history of more than 90 years, continues to be a cornerstone for some of the world's most beloved brands.

The broader strategy of Mars, Incorporated revolves around enhancing its manufacturing and innovation capacities across Europe. Currently operating 24 factories in 10 EU countries, Mars employs approximately 25,700 people, facilitating exports to over 100 markets. This investment is not just confined to the UK; similar commitments are being observed in other European nations. In France, for instance, Mars has invested nearly €500 million over the past five years across its eight factories, focusing on production modernization and advancing environmental transition initiatives.

In the Netherlands, the company continues to invest between €28–30 million annually to strengthen its Veghel factory, reflecting its ongoing commitment to maintaining a leading position in European chocolate production. Meanwhile, a significant €250 million investment is directed towards the Janaszówek chocolate factory in Poland over the next few years, aimed at introducing state-of-the-art automation.

On a global scale, Mars, Incorporated’s long-term manufacturing strategy aims to foster resilient, innovative, and modern production facilities. This includes its ongoing plan to invest €1 billion across the EU and an additional $2 billion in its US operations by 2026. Notably, the company's recent acquisition of Kellanova marks a significant step towards enhancing growth and innovation within its snacking portfolio, ultimately aiming to create a positive impact on the communities it serves and the environment.

Mars, Incorporated embodies a vision where responsible business practices pave the way for a better tomorrow. As a family-owned entity with a portfolio worth over $65 billion, it remains dedicated to producing high-caliber pet care and snack products, aiming for excellence and sustainability in all its operations. Further details about Mars and its extensive product lines, which include widely recognized brands like SNICKERS® and WHISKAS®, can be found on their official website.