# Altri to acquire majority stake in AeoniQ for sustainable textile yarn production

Altri SGPS S.A. signed an agreement to acquire a majority stake in AeoniQ, a cleantech spin-off of HeiQ Materials AG, to build the world's first industrial plant for climate-positive cellulosic filament yarn at Altri's Caima pulp mill in Portugal, with construction expected to begin in 2026.

- Type: Acquisition
- Announced: 2025-07-01
- Where: Caima, Portugal
- Status: announced
- Capacity: 1,750 tons per year
- Products: climate-positive cellulosic filament yarn
- Sectors: [Industrial Textiles](https://endata.com/sectors/industrial-textiles.md)

## Companies

- [HeiQ Materials AG](https://endata.com/companies/67820.md) (partner)
- [AeoniQ](https://endata.com/companies/85710.md) (target)
- [Altri SGPS](https://endata.com/companies/85723.md) (acquirer)

## Sources

- [heiq.com](https://www.heiq.com/news-events/news/altri-acquire-majority-stake-aeoniq%E2%84%A2-scale-world%E2%80%99s-first-industrial-production), 2025-07-01: "The Altri investment, including a capital increase, will allow building out commercial-scale AeoniQ production capacity."

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Data from Endata (https://endata.com/). Announcements are summarized from public sources and may be incomplete; check the linked originals.