# Terumo Neuro to acquire Arsenal Medical for liquid embolic technology

Terumo Neuro signed an agreement to acquire Arsenal Medical, a clinical-stage biomaterials company developing NeoCast, an investigational liquid embolic technology for treating chronic subdural hematoma. The acquisition expands Terumo Neuro's neurovascular portfolio.

- Type: Acquisition
- Announced: 2026-09-29
- Where: Aliso Viejo, California, United States
- Status: announced
- Products: NeoCast liquid embolic technology
- Sectors: [Medical Devices](https://endata.com/sectors/medical-devices.md)

## Companies

- [Arsenal Medical](https://endata.com/companies/63843.md) (target)
- [Terumo Neuro](https://endata.com/companies/94354.md) (acquirer)

## Sources

- [terumoneuro.com](https://www.terumoneuro.com/newsroom/press-releases/terumo-neuro-signs-agreement-to-acquire-arsenal-medical-advancing-next-generation-liquid-embolic-innovation-for-treating-chronic-subdural-hematoma-csdh), 2026-09-29: "NeoCast represents a compelling opportunity to advance what could be a game-changing innovation in the treatment of chronic subdural hematoma."

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