April 2025
Produ-Plast AG and Prewag AG are joining forces

By acquiring Prewag, Produ-Plast expands its expertise in the development and manufacturing of plastic parts using the injection molding process.
Produ-Plast has acquired Prewag retroactively effective as of January 1, 2025. With this step, Prewag’s two owners have successfully implemented their succession plan. In the coming years, the two companies will merge their operations, act jointly, and continuously further develop their business.
The merger creates numerous synergies and, thanks to the combined volume of both companies, enables a more efficient operation across the entire value chain. The two experienced entrepreneurs from Prewag will remain part of the management of the new corporate group and will continue to contribute their expertise and experience in the coming years. The digitized processes of Produ-Plast will be gradually transferred to the new, integrated company. This strategic merger lays the foundation to offer state-of-the-art technologies and innovative solutions for injection molding and assembly services, while also flexibly adapting logistics to meet customers’ needs.
“We are thrilled to welcome Prewag into our corporate family,” says Rino Lacher, co-owner of Produ-Plast. “This is an important step in our growth strategy, and the modern site in Neuhaus will help us offer our customers even better and more efficient solutions.”
Guido Guggenberger adds: “My brother and I took over Prewag from our father and have successfully built it up over the past decades. We are pleased to have found a new owner in Produ-Plast and Rino Lacher who will continue the company at our modern Neuhaus site in the medium term.” His brother Roger Guggenberger adds: “We deliberately approached this important decision early as part of our succession planning. We look forward to the coming years, during which we will contribute our experience to building on what we have achieved.”
After the merger, all contacts, agreements, and processes for customers, business partners, and employees will remain unchanged. Thanks to the ongoing growth of both companies, all employees will continue to be employed despite the realization of synergy potential.
About Produ-Plast AG
Founded in 2004 and based in Buttikon, Produ-Plast is a dynamic and innovative company specializing in plastic injection molding. Since 2018, the company has been successfully managed and developed by co-owner Rino Lacher. Thanks to investments in new production facilities and a young, well-trained team, the business with plastic injection molded parts and assemblies has been continuously expanded.
More information: www.produplast.ch
About Prewag AG
Prewag, based in Neuhaus SG, has been successfully active in the same industry for around 40 years. The brothers Guido and Roger Guggenberger took over the company from their father about 20 years ago. They have continuously and successfully developed Prewag further at the new site in Neuhaus. Today, renowned customers from various industries are supplied with high-quality technical injection molded parts.
More information: www.prewag.ch
Role of Ramus & Company
Ramus & Company advised Prewag AG throughout all phases of the M&A process as part of a sell-side mandate, leading to a successful completion.