# Boston Scientific invests $1.5B in MiRus for 34% stake

Boston Scientific invested $1.5 billion for an approximately 34% equity stake in MiRus LLC, a developer of biomaterials and implants for cardiovascular and orthopedic diseases. Boston Scientific also received an exclusive option to acquire MiRus' TAVR system.

- Type: Investment
- Announced: 2026-05-18
- Where: United States
- Value: $1.50B
- Status: announced
- Products: SIEGEL Balloon Expandable TAVR system, biomaterials, implants
- Sectors: [Medical Devices](https://endata.com/sectors/medical-devices.md)

## Companies

- [MiRus](https://endata.com/companies/40216.md)
- [Boston Scientific](https://endata.com/companies/15966.md) (investor)

## Sources

- [mirusmed.com](https://www.mirusmed.com/boston-scientific-strategic-invesetment-in-mirus/), 2026-05-18: "The occurrence and recognition of aortic stenosis is growing rapidly and our investment in MiRus continues our pursuit to bring a differentiated TAVR system into our portfolio that we anticipate may improve outcomes for patients living with this life-threatening disease."

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