Istesso Limited

Active10756496 Private limited company

Incorporated: 5 May 2017 (9 years)
Industry: Other research and experimental development on natural sciences and engineering (72190)
Directors: Ip2ipo Services Limited
Michael Owen
Peter Vance Allen
all 6 directors
Owned by: Ip2ipo Limited
Accounts type: Group
Region: Greater London
Address: 2nd Floor 3 Pancras Square
Kings Cross
London
N1C 4AG

Filing status

Accounts due: 30 September 2027
Last accounts: 31 December 2025
Conf. stmt due: 22 May 2027
Last conf. stmt: 8 May 2026

Officers 7 active

Officer details are public data from the Companies House register.

Ip2ipo Services Limited

Corporate Director · Appointed 2 July 2025

Also at Matter Machine Technologies Limited, Oxehealth Limited, Accelercomm Ltd · more companies

Owen, Michael, Dr

Director · Appointed 1 June 2025

British

Born May 1951 (75)

Pinsent Masons Secretarial Limited

Corporate Secretary · Appointed 12 September 2017

Also at LSF9 Robin Investments Limited, Click Bond Limited, Resonance NI Power Limited · more companies

Allen, Peter Vance

Director · Appointed 1 September 2017

British

Born March 1956 (70)

Peters, David Keith, Professor Sir

Director · Appointed 1 September 2017

British

Born July 1938 (88)

Patel, Lisa, Dr

Director · Appointed 5 May 2017

Also at Istesso Therapeutics Limited, Pimco 2664 Limited · more companies

British

Born May 1973 (53)

Williams, Samuel Cameron, Dr

Director · Appointed 5 May 2017

British

Born April 1969 (57)

Officer history (2 former)

2 July 2025

Appointed Ip2ipo Services Limited as Corporate Director

1 June 2025

Appointed Owen, Michael, Dr as Director

22 December 2017

Resigned Ip2ipo Services Limited as Corporate Director

12 September 2017

Appointed Pinsent Masons Secretarial Limited as Corporate Secretary

12 September 2017

Resigned Ip2ipo Services Limited as Corporate Secretary

1 September 2017

Appointed Allen, Peter Vance as Director

1 September 2017

Appointed Peters, David Keith, Professor Sir as Director

5 May 2017

Appointed Patel, Lisa, Dr as Director

5 May 2017

Appointed Williams, Samuel Cameron, Dr as Director

5 May 2017

Appointed Ip2ipo Services Limited as Corporate Secretary

5 May 2017

Appointed Ip2ipo Services Limited as Corporate Director

Ownership 1 active

People and entities with significant control, from the Companies House PSC register

Ip2ipo Limited

Corporate entity · Notified 18 September 2018

Owns 25–50% of shares

Holds 25–50% of voting rights

Limited By Shares

Reg. no. 04072979

Former controllers (2)

18 September 2018

Ceased IP Group PLC — Owns 25–50% of shares

30 June 2017

Ceased Samuel Cameron Williams — Owns 75–100% of shares

Group structure 58 shown

Ownership group derived from the Companies House PSC register

IP Group PLC

Fusion IP Cardiff Limited Owns 75–100% of shares

Demasq Limited DissolvedOwns 25–50% of shares

Fusion IP Sheffield Limited Owns 75–100% of shares

Ip2ipo Carry Partner Limited Owns 75–100% of shares

Ip2ipo Investments Limited Owns 75–100% of shares

Ip2ipo Limited Owns 75–100% of shares

Alesi Surgical Limited Owns 25–50% of shares

Boxarr Limited Owns 25–50% of shares

Emdot Limited In liquidationOwns 25–50% of shares

IP Venture Fund (FP) Limited Partnership Part right to 25–50% of surplus assets

Ip2ipo Americas Limited Owns 75–100% of shares

Ip2ipo Anz Carry Limited Owns 75–100% of shares

Ipg Usa (LP) Limited Owns 75–100% of shares

Istesso Limited This company Owns 25–50% of shares

Istesso 2 Limited Owns 75–100% of shares

Istesso 3 Limited Owns 75–100% of shares

Istesso Therapeutics Limited Owns 75–100% of shares

MBS5 Limited Owns 75–100% of shares

PH Therapeutics Limited Owns 50–75% of shares

Ip2ipo Nominees Limited Owns 75–100% of shares

Bramble Energy Limited In administrationOwns 25–50% of shares

Ip2ipo Services Limited Owns 75–100% of shares

Magnomatics Limited Owns 25–50% of shares

Parkwalk Advisors Ltd Owns 75–100% of shares

Cambridge Touch Technologies Ltd In liquidationHolds 25–50% of voting rights

Crypto Quantique Limited In liquidationOwns 25–50% of shares

Ikarovec Limited Owns 25–50% of shares

Lettus Grow Ltd Owns 25–50% of shares

Mind Foundry Limited Holds 25–50% of voting rights

Moa Technology Limited Owns 25–50% of shares

Opsydia Limited Has significant influence or control

Oxford Endovascular Limited Holds 25–50% of voting rights

Pervasid Limited Owns 25–50% of shares

Predictimmune Limited Status not confirmedOwns 25–50% of shares

Psyomics Ltd Owns 50–75% of shares

Salunda Limited Holds 25–50% of voting rights

Symetrica Limited Has significant influence or control

Symetrica Security Ltd Owns 75–100% of shares

Top Technology Ventures Limited Owns 75–100% of shares

IP Capital Limited Owns 75–100% of shares

IP Venture Fund II (GP) LLP Right to 75–100% of surplus assets

IP Ventures (Scotland) Limited Owns 75–100% of shares

Ip2ipo Portfolio (GP) Limited Owns 75–100% of shares

Accelercomm Ltd Owns 25–50% of shares

Audioscenic Limited Owns 25–50% of shares

Barocal Ltd Owns 25–50% of shares

First Light Fusion Limited Owns 25–50% of shares

Ibex Innovations Ltd Has significant influence or control

Intrinsic Semiconductor Technologies Limited Owns 25–50% of shares

Ionix Advanced Technologies Ltd Owns 25–50% of shares

Kiko Ventures Limited Owns 75–100% of shares

Lumai Limited Owns 25–50% of shares

Mixergy Limited Has significant influence or control

Oxehealth Limited Owns 25–50% of shares

Touchstone Innovations Limited Owns 75–100% of shares

Ip2ipo Innovations Limited Owns 75–100% of shares

Touchstone Innovations Businesses LLP Right to 75–100% of surplus assets

Filings

Recent filings only. See the full history on Companies House

Date	Description	Made Up To
8 June 2026	Group of companies' accounts	31 December 2025
8 May 2026	Confirmation statement with updates	8 May 2026
5 February 2026	Statement of capital following an allotment of shares
26 January 2026	Statement of capital following an allotment of shares
17 November 2025	Statement of capital following an allotment of shares