# Tungsten Bidco Limited

## Details

- **Company number:** [11852085](https://find-and-update.company-information.service.gov.uk/company/11852085)
- **Status:** Active
- **Type:** Private Limited Company
- **Incorporated:** 28 Feb 2019
- **Registered office:** BUILDING 5 FOUNDATION PARK, ROXBOROUGH WAY, MAIDENHEAD, SL6 3UD
- **Nature of business:** [64209](/sic/64209) Activities of other holding companies n.e.c.



## Officers

| Name | Role | Appointed | Resigned |
|---|---|---|---|
| PURWAHA, Amit Singh | director | 14 Jul 2025 |  |



## Control

| Name | Nature of control | Notified | Ceased |
|---|---|---|---|
| Biogen Inc. | ownership-of-shares-75-to-100-percent, voting-rights-75-to-100-percent, right-to-appoint-and-remove-directors | 28 Feb 2019 |  |






## Directors' other companies

- [PURWAHA, Amit Singh](/person/6409044) - director at [Nightstarx Limited](/company/08551822)
- [PURWAHA, Amit Singh](/person/6409044) - director at [Reata UK Limited](/company/06786814)
- [PURWAHA, Amit Singh](/person/6409044) - director at [Convergence Pharmaceuticals Holdings Limited](/company/07596438)
- [PURWAHA, Amit Singh](/person/6409044) - director at [Biogen Idec Research Limited](/company/07588215)
- [PURWAHA, Amit Singh](/person/6409044) - director at [Convergence Pharmaceuticals Limited](/company/09376285)
- [PURWAHA, Amit Singh](/person/6409044) - director at [Silver Acquisition Co Limited](/company/09363050)
- [PURWAHA, Amit Singh](/person/6409044) - director at [Apellis UK Limited](/company/12528378)
- [PURWAHA, Amit Singh](/person/6409044) - director at [Old Convergence Pharmaceuticals Limited](/company/07289568)
- [PURWAHA, Amit Singh](/person/6409044) - director at [Nightstar Therapeutics Limited](/company/10852952)
- [PURWAHA, Amit Singh](/person/6409044) - director at [Biogen Idec Limited](/company/01497267)



## Companies at the same address

- [Biogen Idec Limited](/company/01497267) (01497267)
- [Biogen Idec Research Limited](/company/07588215) (07588215)
- [Convergence Pharmaceuticals Holdings Limited](/company/07596438) (07596438)
- [Convergence Pharmaceuticals Limited](/company/09376285) (09376285)
- [Nightstar Therapeutics Limited](/company/10852952) (10852952)
- [Nightstarx Limited](/company/08551822) (08551822)
- [Old Convergence Pharmaceuticals Limited](/company/07289568) (07289568)
- [Silver Acquisition Co Limited](/company/09363050) (09363050)