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Alnylam UK Limited
- Incorporated
- 31 January 2014 (12 years)
- Industry
- Research and experimental development on biotechnology (72110)
- Directors
- Carlos Arnaldo Dal Secco PagnanoKatarzyna Maria WitkosJeffrey Vernon Poulton
- Owned by
- Alnylam Pharmaceuticals Inc
- Accounts type
- Full
- Region
- South East
- Address
- Point27 Market StreetMaidenheadSL6 8AA
Filing status
- Accounts due
- 30 September 2027
- Last accounts
- 31 December 2025
- Conf. stmt due
- 14 February 2027
- Last conf. stmt
- 31 January 2026
Officers 4 active
Officer details are public data from the Companies House register.
Pagnano, Carlos Arnaldo Dal Secco
Director · Appointed 6 June 2023
Brazilian
Born June 1979 (47)
Witkos, Katarzyna Maria
Director · Appointed 13 September 2021
Swiss
Born May 1972 (54)
Poulton, Jeffrey Vernon
Director · Appointed 13 August 2019
American
Born November 1967
Greco, Arianna
Secretary · Appointed 16 June 2017
Officer history (14 former)
6 June 2023
Resigned Jones, David Ronald as Director
6 June 2023
Appointed Pagnano, Carlos Arnaldo Dal Secco as Director
13 September 2021
Appointed Witkos, Katarzyna Maria as Director
13 September 2021
Resigned Greco, Arianna as Director
1 April 2020
Appointed Greco, Arianna as Director
31 March 2020
13 August 2019
Appointed Poulton, Jeffrey Vernon as Director
12 August 2019
27 May 2019
Resigned Vaishnaw, Akshay Krishnadas as Director
27 May 2019
27 May 2019
Appointed Jones, David Ronald as Director
2 May 2019
Resigned Boursier, Jean-Yves Philippe as Director
9 October 2017
Resigned Dulac, Emmanuel as Director
9 October 2017
16 June 2017
Appointed Dulac, Emmanuel as Director
16 June 2017
Appointed Boursier, Jean-Yves Philippe as Director
16 June 2017
Appointed Greco, Arianna as Secretary
16 June 2017
Resigned Mason, Michael Paul as Director
16 June 2017
Resigned Delena, Mary Beth as Director
9 March 2017
31 December 2014
Resigned Reid, Laurence Edward as Director
31 January 2014
31 January 2014
Appointed Reid, Laurence Edward as Director
31 January 2014
31 January 2014
31 January 2014
31 January 2014
Appointed Delena, Mary Beth as Director
31 January 2014
31 January 2014
Appointed Mason, Michael Paul as Director
31 January 2014
31 January 2014
Appointed Vaishnaw, Akshay Krishnadas as Director
31 January 2014
Ownership 1 active
People and entities with significant control, from the Companies House PSC register
Alnylam Pharmaceuticals Inc
Corporate entity · Notified 31 January 2017
Owns 75–100% of shares
Holds 75–100% of voting rights
Right to appoint and remove directors
Corporation
Reg. no. 77-0602661
Filings 75
| Date | Description | Made Up To | Pages | |
|---|---|---|---|---|
| 30 September 2026 | Full accounts | 31 December 2025 | ||
| 1 May 2026 | Registered office address changed | |||
| 12 February 2026 | Director's details changed | |||
| 12 February 2026 | Director's details changed | |||
| 12 February 2026 | Confirmation statement with no updates | 31 January 2026 |
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