Rosti Group has completed its acquisition of Alvi Group, bringing five plastics manufacturing and tooling sites in Norway, Sweden, Poland and China into its international contract manufacturing business. The transaction completed on 2 November 2026 and was disclosed one week later.
Approximately 400 employees are joining Rosti, bringing the combined workforce to around 3,000. The enlarged group reports annual revenue of approximately €450 million, including about €50 million attributable to the acquired operation. The purchase price and financing terms have not been disclosed.
The acquisition adds Norway to Rosti’s manufacturing footprint and extends its operations in Sweden, Poland and China. The locations named by the company include Leksvik, Tyresö, Wrocław and Suzhou; the Norwegian tooling business Industriverktøy is also included within the five acquired sites.
Rosti provides plastic injection moulding, product engineering and contract manufacturing services for industrial, medical and consumer applications. Alvi contributes regional production capacity and tooling expertise, giving the combined company additional options for development, manufacture and component supply.
The acquired businesses will operate under Rosti branding, including Rosti Norway, Rosti Sweden, Rosti Poland and Rosti China. Industriverktøy becomes Rosti Industriverktøy, while changes to signage, business documentation and contact information are planned within 100 days of the November announcement.
The company says current quality standards, certifications, lead times and service commitments will continue during integration. Where it identifies differences between procedures, it intends to work with the acquired teams on changes rather than interrupt existing customer programmes.
Plastic injection moulding converts polymer feedstock into finished or semi-finished components by heating material and injecting it into a shaped mould cavity. Once the part has cooled sufficiently, it can be removed for inspection, finishing or assembly into a larger product.
The repeatability of this process depends on control of material condition, melt temperature, injection conditions, mould geometry and cooling. Changes to these parameters can alter dimensional accuracy, surface quality and the properties of the finished part, especially in long production runs.
Tooling capability is closely connected to manufacturing performance. Mould design influences how polymer fills a cavity, how air escapes and how heat is removed. Tool maintenance and the condition of moving parts can also affect the consistency of production over time.
Bringing Industriverktøy into the group gives Rosti another specialist tooling resource. The company has not provided a site-by-site equipment inventory or quantified additional tooling capacity, so the scale of the acquired machinery cannot be established from the transaction announcement.
Contract manufacturing programmes often require suppliers to translate customer drawings and performance specifications into validated production methods. That work can involve material selection, tool design, process trials, measurement plans and procedures for detecting deviations before a component is released.
Industrial customers may need components with defined mechanical, thermal or chemical characteristics. Medical device programmes can add requirements concerning material traceability, contamination controls and documentation, depending on the intended use of the part and the applicable regulatory framework.
Rosti identifies medical device manufacturing as an area strengthened by the transaction. It has not identified which Alvi lines will handle individual medical programmes or announced a new certified production environment linked specifically to this acquisition.
A network spanning Europe, Asia and the United States can provide alternative locations for manufacturing programmes. That flexibility must be assessed against actual equipment, materials and customer approvals rather than assumed solely from the presence of factories in several countries.
Moving a mould between sites can require machine compatibility checks, trial production and renewed inspection. Differences in polymer sourcing, machine response or cooling conditions may alter part characteristics even when two facilities use the same drawings and nominally similar equipment.
Changes to a production location can also require customer approval and updated quality records. Regulated applications may involve formal process validation or review of manufacturing arrangements before components can be supplied from an alternative site.
The enlarged group intends to make its research, engineering and development resources available to Alvi customers, while Rosti customers will gain access to the acquired operations. The company has not quantified the number of programmes expected to transfer or provided specific revenue synergies.
Rosti also plans to extend its sustainability reporting and management practices to the acquired operations, referencing arrangements aligned with the Corporate Sustainability Reporting Directive. No acquisition-specific emissions reduction or capital programme has been announced.
The business has been owned by Swedish investment group Nordstjernan since 2010 and is headquartered in Malmö. Its latest acquisition increases the manufacturing network while retaining existing production commitments during the integration process.
The immediate steps are operational integration and the transition of the acquired facilities to Rosti branding. The effects on manufacturing capacity and customer programmes will become clearer as the sites enter the group’s common engineering and quality arrangements, while financial terms remain private.
