TXT In plain English
Company description
RONSEK LIMITED is a UK company whose Companies House status is “Active” and whose registered company type is “Private Limited Company”. Incorporated on 20 May 2004; registered for 22 years; registered office reported in HERTFORDSHIRE. Its primary declared activity is 72190 · Other research and experimental development on natural sciences and engineering, with 1 additional SIC activity reported.
In its latest electronically filed accounts for the period ended 19 May 2025, it reported turnover £7,790, profit after tax −£78,384, net assets £877. This BritDB profile also contains linked public records: 2 PSC records, 1 trade mark, 30 procurement records. This description is assembled from public data, is not a reliability assessment, and should be checked against the cited sources before a legally significant decision.
Web facts are never added from a name match alone. Internet enrichment requires the exact Companies House ID in Wikidata, and ambiguous results are excluded.
01 Company overview
Identity and registration
- Official name
- RONSEK LIMITED
- Company number
- 05133530
- Company type
- Private Limited Company
- Status
- Active
- Country of origin
- United Kingdom
- Dissolution date
- Not supplied
- Accounts category
- MICRO ENTITY
- Mortgage charges
- 0 total · 0 outstanding · 0 satisfied
- Limited partnership members
- 0 general · 0 limited
A registered office is not necessarily a trading location. The address is reproduced from the Companies House bulk record and should be interpreted in that legal context.
02 Filing dates
Accounts and statements
Last accounts made up to
19 May 2025Next accounts due
19 February 2027Last statement made up to
16 April 2026Next statement due
30 April 2027BritDB does not infer overdue status when the source does not state it.
03 Filed financials
Latest electronic accounts
- Turnover
- £7,790
- Profit after tax
- −£78,384
- Net assets
- £877
- Current assets
- £877
- Total assets less current liabilities
- £877
- Equity
- £877
Figures are taken from company-filed iXBRL/XBRL. Coverage is limited to electronic filings in the imported Companies House batch. Missing figures do not mean zero, and values have not been audited by BritDB.
04 Public procurement
Contracts Finder awards
ITT for Project 10193447
UK RESEARCH & INNOVATION · ocds-b5fd17-aed72954-302a-4c01-9e11-24e3ec08df12
- Supplier named in award
- RONSEK LIMITED
- Award value
- £18,500
- Contract period
- 1 July 2026 – 30 June 2029
- Published
- 30 July 2026
- Procedure
- Call-off from a dynamic purchasing system
- Main CPV
- 79421100
- Source release ID
- ocds-b5fd17-aed72954-302a-4c01-9e11-24e3ec08df12-2026-07-30T14:42:59+01:00
ITT for project 10167518
UK RESEARCH & INNOVATION · ocds-b5fd17-a2b24071-5ea7-416c-9104-4b516fbb8d90
- Supplier named in award
- RONSEK LIMITED
- Award value
- £5,299
- Contract period
- 1 April 2026 – 30 September 2027
- Published
- 19 February 2026
- Procedure
- Call-off from a dynamic purchasing system
- Main CPV
- 79421100
- Source release ID
- ocds-b5fd17-a2b24071-5ea7-416c-9104-4b516fbb8d90-2026-02-19T12:51:12Z
ITT for project 10168953
UK RESEARCH & INNOVATION · ocds-b5fd17-6d0d145b-963f-462e-97d4-b14887a6ee42
- Supplier named in award
- RONSEK LIMITED
- Award value
- £4,949
- Contract period
- 1 April 2026 – 30 September 2027
- Published
- 2 February 2026
- Procedure
- Call-off from a dynamic purchasing system
- Main CPV
- 79421100
- Source release ID
- ocds-b5fd17-6d0d145b-963f-462e-97d4-b14887a6ee42-2026-02-02T12:49:19Z
ITT for project 10180300
UK RESEARCH & INNOVATION · ocds-b5fd17-e6059d28-2379-4c06-8ba4-73b90b4bcdbf
- Supplier named in award
- RONSEK LIMITED
- Award value
- £6,016
- Contract period
- 1 February 2026 – 31 January 2028
- Published
- 6 February 2026
- Procedure
- Call-off from a dynamic purchasing system
- Main CPV
- 79421100
- Source release ID
- ocds-b5fd17-e6059d28-2379-4c06-8ba4-73b90b4bcdbf-2026-02-06T07:23:42Z
ITT for project 10171370
UK RESEARCH & INNOVATION · ocds-b5fd17-283630cc-2035-4436-a70e-61a439d9b4b9
- Supplier named in award
- RONSEK LIMITED
- Award value
- £1,317
- Contract period
- 1 November 2025 – 30 April 2026
- Published
- 29 October 2025
- Procedure
- Call-off from a dynamic purchasing system
- Main CPV
- 79421100
- Source release ID
- ocds-b5fd17-283630cc-2035-4436-a70e-61a439d9b4b9-2025-10-29T09:27:01Z
ITT for project 10173352
UK RESEARCH & INNOVATION · ocds-b5fd17-41d4a27c-f53c-4a2b-85ff-d7d64e9fde73
- Supplier named in award
- RONSEK LIMITED
- Award value
- £1,317
- Contract period
- 1 November 2025 – 31 March 2026
- Published
- 29 October 2025
- Procedure
- Call-off from a dynamic purchasing system
- Main CPV
- 79421100
- Source release ID
- ocds-b5fd17-41d4a27c-f53c-4a2b-85ff-d7d64e9fde73-2025-10-29T09:24:18Z
ITT for Project 10125891
UK RESEARCH & INNOVATION · ocds-b5fd17-4459e942-c362-4022-870c-b29be9b7fbf6
- Supplier named in award
- RONSEK LIMITED
- Award value
- £2,166.50
- Contract period
- 1 February 2025 – 31 March 2025
- Published
- 20 February 2025
- Procedure
- Call-off from a dynamic purchasing system
- Main CPV
- 79421100
- Source release ID
- ocds-b5fd17-4459e942-c362-4022-870c-b29be9b7fbf6-2025-02-20T14:15:03Z
ITT for projects 10131588, 10131668
UK RESEARCH & INNOVATION · ocds-b5fd17-2fbe8a4a-abb7-496c-a955-1999ae97f680
- Supplier named in award
- RONSEK LIMITED
- Award value
- £4,490
- Contract period
- 1 November 2024 – 30 April 2025
- Published
- 13 September 2024
- Procedure
- Call-off from a dynamic purchasing system
- Main CPV
- 79421100
- Source release ID
- ocds-b5fd17-2fbe8a4a-abb7-496c-a955-1999ae97f680-2024-09-13T13:11:37+01:00
ITT for Projects 10126233, 10124398, 10123390
UK RESEARCH & INNOVATION · ocds-b5fd17-53264b0f-a064-4e28-bdc9-f5cb4ee90716
- Supplier named in award
- RONSEK LIMITED
- Award value
- £7,485
- Contract period
- 1 October 2024 – 31 March 2025
- Published
- 28 August 2024
- Procedure
- Call-off from a dynamic purchasing system
- Main CPV
- 79421100
- Source release ID
- ocds-b5fd17-53264b0f-a064-4e28-bdc9-f5cb4ee90716-2024-08-28T09:24:14+01:00
ITT for Projects 10123285, 10122954
UK RESEARCH & INNOVATION · ocds-b5fd17-7b91dd62-f2e6-43c5-9af7-7cf22da2191f
- Supplier named in award
- RONSEK LIMITED
- Award value
- £4,990
- Contract period
- 1 October 2024 – 31 March 2025
- Published
- 28 August 2024
- Procedure
- Call-off from a dynamic purchasing system
- Main CPV
- 79421100
- Source release ID
- ocds-b5fd17-7b91dd62-f2e6-43c5-9af7-7cf22da2191f-2024-08-28T09:27:10+01:00
ITT for projects 10125433, 10127757
UK RESEARCH & INNOVATION · ocds-b5fd17-c7751a8d-4690-435b-a625-3baa341f8b34
- Supplier named in award
- RONSEK LIMITED
- Award value
- £7,344
- Contract period
- 1 October 2024 – 30 September 2025
- Published
- 30 July 2024
- Procedure
- Call-off from a dynamic purchasing system
- Main CPV
- 79421100
- Source release ID
- ocds-b5fd17-c7751a8d-4690-435b-a625-3baa341f8b34-2024-07-30T15:54:27+01:00
ITT for Project 10106433
UK RESEARCH & INNOVATION · ocds-b5fd17-b0221a86-977c-4afe-b980-3d11ed00ae61
- Supplier named in award
- RONSEK LIMITED
- Award value
- £5,355.50
- Contract period
- 1 August 2024 – 31 October 2025
- Published
- 13 June 2024
- Procedure
- Call-off from a dynamic purchasing system
- Main CPV
- 79421100
- Source release ID
- ocds-b5fd17-b0221a86-977c-4afe-b980-3d11ed00ae61-2024-06-13T10:04:21+01:00
ITT for Project 10111957
UK RESEARCH & INNOVATION · ocds-b5fd17-c4010a0b-06d7-4a85-a4cc-0f1a5d88e926
- Supplier named in award
- RONSEK LIMITED
- Award value
- £4,265.50
- Contract period
- 1 June 2024 – 31 August 2025
- Published
- 8 May 2024
- Procedure
- Call-off from a dynamic purchasing system
- Main CPV
- 79421100
- Source release ID
- ocds-b5fd17-c4010a0b-06d7-4a85-a4cc-0f1a5d88e926-2024-05-08T10:56:52+01:00
ITT for Project 10107837
UK RESEARCH & INNOVATION · ocds-b5fd17-20a255f2-7117-4790-9b5b-9bbd9a6b83df
- Supplier named in award
- RONSEK LIMITED
- Award value
- £4,939
- Contract period
- 1 June 2024 – 30 November 2025
- Published
- 8 May 2024
- Procedure
- Call-off from a dynamic purchasing system
- Main CPV
- 79421100
- Source release ID
- ocds-b5fd17-20a255f2-7117-4790-9b5b-9bbd9a6b83df-2024-05-08T11:00:34+01:00
ITT for project 10107966
UK RESEARCH & INNOVATION · ocds-b5fd17-d3618a3e-e294-4137-b4f3-a35f018f0a04
- Supplier named in award
- RONSEK LIMITED
- Award value
- £4,939
- Contract period
- 1 July 2024 – 31 December 2025
- Published
- 30 April 2024
- Procedure
- Call-off from a dynamic purchasing system
- Main CPV
- 79421100
- Source release ID
- ocds-b5fd17-d3618a3e-e294-4137-b4f3-a35f018f0a04-2024-04-30T06:52:59+01:00
ITT for projects 10112566, 10108716
UK RESEARCH & INNOVATION · ocds-b5fd17-821157c9-8296-45f4-ae6d-d8348f7fe91b
- Supplier named in award
- RONSEK LIMITED
- Award value
- £8,531
- Contract period
- 1 May 2024 – 30 November 2025
- Published
- 30 April 2024
- Procedure
- Call-off from a dynamic purchasing system
- Main CPV
- 79421100
- Source release ID
- ocds-b5fd17-821157c9-8296-45f4-ae6d-d8348f7fe91b-2024-04-30T06:49:53+01:00
ITT for Project 10110550
UK RESEARCH & INNOVATION · ocds-b5fd17-5e10ed83-9a8f-4eaf-a063-c1dd2e51c0f7
- Supplier named in award
- RONSEK LIMITED
- Award value
- £3,134
- Contract period
- 1 May 2024 – 31 October 2024
- Published
- 19 April 2024
- Procedure
- Call-off from a dynamic purchasing system
- Main CPV
- 79421100
- Source release ID
- ocds-b5fd17-5e10ed83-9a8f-4eaf-a063-c1dd2e51c0f7-2024-04-19T11:21:00+01:00
ITT for projects 10105200 10104920 10104889 10102894 10102848 10102381 10102090
UK RESEARCH & INNOVATION · ocds-b5fd17-8fb1d1ac-618f-4e95-a7ca-a77ee462f1c5
- Supplier named in award
- RONSEK LIMITED
- Award value
- £24,097.50
- Contract period
- 1 April 2024 – 30 November 2024
- Published
- 31 January 2024
- Procedure
- Call-off from a dynamic purchasing system
- Main CPV
- 79421100
- Source release ID
- ocds-b5fd17-8fb1d1ac-618f-4e95-a7ca-a77ee462f1c5-2024-01-31T10:22:08Z
ITT for project 10094179
UK RESEARCH & INNOVATION · ocds-b5fd17-490c9973-4fd4-4a99-8d5f-b6b2ddf9b982
- Supplier named in award
- RONSEK LIMITED
- Award value
- £4,609.50
- Contract period
- 1 February 2024 – 30 April 2025
- Published
- 12 January 2024
- Procedure
- Call-off from a dynamic purchasing system
- Main CPV
- 79421100
- Source release ID
- ocds-b5fd17-490c9973-4fd4-4a99-8d5f-b6b2ddf9b982-2024-01-12T07:06:24Z
ITT for Project 10106196
UK RESEARCH & INNOVATION · ocds-b5fd17-3930011a-4fcf-4ebc-a531-30a65303b7d6
- Supplier named in award
- RONSEK LIMITED
- Award value
- £6,134.50
- Contract period
- 1 March 2024 – 31 March 2025
- Published
- 10 January 2024
- Procedure
- Call-off from a dynamic purchasing system
- Main CPV
- 79421100
- Source release ID
- ocds-b5fd17-3930011a-4fcf-4ebc-a531-30a65303b7d6-2024-01-10T14:39:19Z
ITT for projects 10101911, 10100103
UK RESEARCH & INNOVATION · ocds-b5fd17-1926b640-c4bc-4233-beb1-88838cd058f2
- Supplier named in award
- RONSEK LIMITED
- Award value
- £16,870
- Contract period
- 1 March 2024 – 28 February 2026
- Published
- 9 January 2024
- Procedure
- Call-off from a dynamic purchasing system
- Main CPV
- 79421100
- Source release ID
- ocds-b5fd17-1926b640-c4bc-4233-beb1-88838cd058f2-2024-01-09T17:00:08Z
ITT for Project 10101506
UK RESEARCH & INNOVATION · ocds-b5fd17-2eddf849-95d1-4451-bade-3b872c02ea7a
- Supplier named in award
- RONSEK LIMITED
- Award value
- £6,868
- Contract period
- 1 February 2024 – 31 July 2025
- Published
- 9 January 2024
- Procedure
- Call-off from a dynamic purchasing system
- Main CPV
- 79421100
- Source release ID
- ocds-b5fd17-2eddf849-95d1-4451-bade-3b872c02ea7a-2024-01-09T16:37:54Z
ITT for Project 10093035
UK RESEARCH & INNOVATION · ocds-b5fd17-d0402590-f5cc-4bb4-b86c-98e3e1d755b7
- Supplier named in award
- RONSEK LIMITED
- Award value
- £3,951
- Contract period
- 1 February 2024 – 31 January 2025
- Published
- 9 January 2024
- Procedure
- Call-off from a dynamic purchasing system
- Main CPV
- 79421100
- Source release ID
- ocds-b5fd17-d0402590-f5cc-4bb4-b86c-98e3e1d755b7-2024-01-09T15:27:59Z
ITT for Project 10093866
UK RESEARCH & INNOVATION · ocds-b5fd17-2eee7757-3854-4255-897d-2c337dd92d36
- Supplier named in award
- RONSEK Limited
- Award value
- £5,688
- Contract period
- 1 January 2024 – 30 June 2025
- Published
- 13 December 2023
- Procedure
- Call-off from a dynamic purchasing system
- Main CPV
- 79421100
- Source release ID
- ocds-b5fd17-2eee7757-3854-4255-897d-2c337dd92d36-2023-12-13T10:42:42Z
ITT for project 10098971
UK RESEARCH & INNOVATION · ocds-b5fd17-6343994b-4d0f-44dd-a9d5-f34b29578382
- Supplier named in award
- RONSEK LIMITED
- Award value
- £9,429
- Contract period
- 1 March 2024 – 28 February 2027
- Published
- 12 December 2023
- Procedure
- Call-off from a dynamic purchasing system
- Main CPV
- 79421100
- Source release ID
- ocds-b5fd17-6343994b-4d0f-44dd-a9d5-f34b29578382-2023-12-12T09:58:55Z
ITT FOR PROJECTS 10087303, 10085632
UK RESEARCH & INNOVATION · ocds-b5fd17-d818ad29-f20b-40e7-a040-cfdd3bc08cbe
- Supplier named in award
- RONSEK LIMITED
- Award value
- £14,070
- Contract period
- 1 October 2023 – 30 September 2025
- Published
- 29 September 2023
- Procedure
- Call-off from a dynamic purchasing system
- Main CPV
- 79421100
- Source release ID
- ocds-b5fd17-d818ad29-f20b-40e7-a040-cfdd3bc08cbe-2023-09-29T09:22:44+01:00
ITT FOR PROJECT 10088776
UK RESEARCH & INNOVATION · ocds-b5fd17-049e6f74-5e38-4c88-8523-ec83352ac3a6
- Supplier named in award
- IFS MO Company
- Award value
- £4,351
- Contract period
- 1 December 2023 – 30 November 2024
- Published
- 19 September 2023
- Procedure
- Call-off from a dynamic purchasing system
- Main CPV
- 79421100
- Source release ID
- ocds-b5fd17-049e6f74-5e38-4c88-8523-ec83352ac3a6-2023-09-19T10:10:33+01:00
ITT for projects 10045611, 10037165
UK RESEARCH & INNOVATION · ocds-b5fd17-5506e36e-e188-4d59-804b-a6b64547eee0
- Supplier named in award
- RONSEK LIMITED
- Award value
- £7,362
- Contract period
- 1 December 2022 – 30 November 2023
- Published
- 23 November 2022
- Procedure
- Call-off from a dynamic purchasing system
- Main CPV
- 79421100
- Source release ID
- ocds-b5fd17-5506e36e-e188-4d59-804b-a6b64547eee0-2022-11-23T09:45:22Z
ITT for project 10045413
UK RESEARCH & INNOVATION · ocds-b5fd17-ad829cbd-f136-4700-9175-a1103f221654
- Supplier named in award
- RONSEK LIMITED
- Award value
- £4,294.50
- Contract period
- 1 December 2022 – 29 February 2024
- Published
- 23 November 2022
- Procedure
- Call-off from a dynamic purchasing system
- Main CPV
- 79421100
- Source release ID
- ocds-b5fd17-ad829cbd-f136-4700-9175-a1103f221654-2022-11-23T09:48:03Z
ITT for project 10046893
UK RESEARCH & INNOVATION · ocds-b5fd17-614dd788-8100-43aa-9369-fa4990c25461
- Supplier named in award
- RONSEK LIMITED
- Award value
- £4,908
- Contract period
- 1 December 2022 – 31 March 2024
- Published
- 23 November 2022
- Procedure
- Call-off from a dynamic purchasing system
- Main CPV
- 79421100
- Source release ID
- ocds-b5fd17-614dd788-8100-43aa-9369-fa4990c25461-2022-11-23T09:42:33Z
The supplier link is exact, but the award remains buyer-published procurement data. BritDB requires the GB-COH identifier supplied in the Contracts Finder OCDS release and does not infer suppliers from similar names.
TM UK trade marks
Exact owner-name matches
This is an exact normalised company-name match, not a registrar-confirmed ownership link. Another legal entity can have the same or a very similar name. UKIPO data is a historical 2018 snapshot; verify the owner and current status before relying on it.
05 Ownership and control
People with significant control
Dr Kesorn Weaver
- Has significant influence or control
- Nationality
- British
- Country of residence
- England
- Notified
- 7 November 2017
- Appointment Verification End On: 9999-12-31T00:00:00Z
- Appointment Verification Start On: 2026-05-17T00:00:00Z
Dr Kesorn Weaver
- Owns 50% to 75% of shares
- Controls 50% to 75% of voting rights
- Nationality
- British
- Country of residence
- England
- Notified
- 6 April 2016
- Appointment Verification End On: 9999-12-31T00:00:00Z
- Appointment Verification Start On: 2026-05-17T00:00:00Z
PSC records are company-filed public-register information. When the exact same displayed individual name occurs at multiple companies, BritDB offers a non-indexed cross-reference page. It is a name match only, not proof that the records describe the same person. Service addresses and partial dates of birth are deliberately omitted.
06 Charity register
Charity Commission links
No exact company-number link in this snapshot
The Charity Commission extract did not explicitly associate this Companies House number with a charity. BritDB does not use a name-only match to fill the gap.
This company-level check covers the Charity Commission for England and Wales. Links are accepted only when the official extract supplies this exact company registration number. Scottish charities now have separate OSCR profiles, but OSCR’s bulk fields do not provide a Companies House number, so BritDB does not infer a company link.
07 Northern Ireland charity register
CCNI exact company links
No unambiguous company-number link found
The CCNI source number did not resolve uniquely to this Companies House record. BritDB did not use a name or address match.
CCNI publishes company numbers without a jurisdiction prefix. BritDB links only when the plausible padded UK and NI candidates resolve to exactly one Companies House company.
08 Sanctions screening
UK Sanctions List
No exact business-registration-number link found
The imported UK Sanctions List did not supply this Companies House number as a UK-linked business identifier. BritDB did not attempt a name-only match.
No exact link is not sanctions clearance. UK restrictions can apply through ownership or control even where an entity is not separately named. Always use the current official list and obtain appropriate advice for a legally significant decision.
09 Public procurement
Find a Tender links
No exact GB-COH link in this snapshot
Find a Tender did not explicitly identify this Companies House number in a procurement party. BritDB did not attempt a name-only match.
These links use only the GB-COH identifier supplied in the procurement record. A company may have other public-sector work that is absent, older, below publication thresholds or published without a Companies House identifier.
10 Environmental register
Environment Agency waste registrations
No exact company-number registration linked
The licensed Environment Agency subset did not contain this exact Companies House number. BritDB did not attempt a name-only match.
This is a privacy-reduced, exact-company subset. The full official register also includes sole traders and applicants without a matching Companies House number. Check the current Environment Agency register before relying on registration status.
11 Nature of business
Standard Industrial Classification
Other professional, scientific and technical activities n.e.c.
12 Connected public record
Checks beyond the company register
Charity Commission
0 exact company-number links.
Northern Ireland charities
0 unambiguous company-number links.
Public contracts
0 procurement processes linked by exact GB-COH identifier.
Waste register
0 exact company-number registrations.
Corporate notices
The Gazette is not yet connected.
UK Sanctions List
No exact business-registration-number link in this report.
A checked source with no exact link is not a clean bill of health. Unchecked sources remain unknown, while sanctions may also apply through ownership or control of a listed person or entity.
13 Record timeline
Dates in the bulk record
- Confirmation statement
Latest confirmation statement made up to this date
- Accounts
Latest accounts made up to this date
- Incorporation
Company incorporated
14 Provenance
Sources for this profile
Identity, address, status, dates, SIC, previous names and mortgage totals.
Company-filed electronic accounts and extracted headline financial facts.
Historic awards linked by exact source-supplied GB-COH company identifier.
Current and ceased significant-control records joined by exact company number.
Daily England and Wales extract matched only by the official company registration number.
Daily CCNI export with company links only where the source number resolves unambiguously.
Complete FCDO list checked by exact UK-linked business registration number.
Procurement parties checked only through exact GB-COH identifiers.
Licensed subset linked only by exact Companies House number.
Financial regulation and licences.
Companies House, Charity Commission, OSCR and UK Sanctions List information is public-register data. BritDB reproduces and organises it with source-specific limits; official external links are kept on the dedicated source pages.