- Company number
- 01017907
- Incorporated
- 16 Jul 197155 years trading
- Registered office
- 2 Leman Street, London, E1W 9US
- Nature of business
- Construction of commercial buildings
Marlex Securities Limited is a 55-year-old private limited company registered in London, company number 01017907, one of 12,075 building contractors in London. Its next accounts are due at Companies House on 28 May 2027, and the CT600 for the period to 28 August 2026 is due at HMRC on 28 August 2027.
Key dates
Worked out from the year end and filing history on the Companies House register.
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Finances
From each year's balance sheet filed at Companies House. Small companies do not have to publish turnover or profit, so these are balance sheet figures.
- Net assets down £55K (-54.4%) on the year before, to £46K.
- Net assets rose in 3 of 8 year-on-year comparisons on record.
- Current assets of £408K against £367K owed within a year: 1.1 times cover.
- No employees reported for the latest year (directors are often not counted as employees).
- Balance sheets on record for 9 years, 2017 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Aug 2025 | £46K | £26K | £408K | £367K | 0 |
| 31 Aug 2024 | £102K | £3,830 | £314K | £220K | 0 |
| 31 Aug 2023 | £94K | £54K | £955K | £870K | 7 |
| 31 Aug 2022 | £83K | £39K | £783K | £713K | 7 |
| 31 Aug 2021 | £61K | £16K | £719K | £664K | 7 |
| 31 Aug 2020 | £81K | £23K | £771K | £696K | 8 |
| 31 Aug 2019 | £105K | £9,438 | £723K | £625K | 8 |
| 31 Aug 2018 | £121K | £1,496 | £671K | £560K | |
| 31 Mar 2017 | £156K | £34K | £3.7M | £3.5M |
Where Marlex Securities Limited is registered
The registered office is in London (E1W), in the Tower Hamlets local authority area, London. Show E1W 9US on a map.
Other trade companies in E1W
- Lti Re Energy Cleantech Arkhitekton LimitedCivil engineering
- Arkhitekton Holdings LimitedProperty developers
- CPG One College Hill LimitedProperty developers
- Limehouse Developments LimitedProperty developers
- Autopeak LtdMotor traders
- Landscape Developments LimitedProperty developers
- Copcourt Estates LimitedProperty developers
- Shen An LimitedProperty developers
Shared registered office
206 companies on our pages use this registered office address. An address shared this widely is usually an accountant's office or a company formation agent's service address, not where the business trades from.
What happens if Marlex Securities Limited files late
Companies House charges an automatic penalty the day after the deadline, and it rises the longer the accounts are late. These are the dates for this company's accounts due on 28 May 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 29 May 2027 to 28 Jun 2027 | £150 |
| 1 to 3 months late | 29 Jun 2027 to 28 Aug 2027 | £375 |
| 3 to 6 months late | 29 Aug 2027 to 28 Nov 2027 | £750 |
| More than 6 months late | From 29 Nov 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 29 Aug 2027 | £200 |
| 3 months late | 28 Nov 2027 | another £200 |
| 6 months late | 28 Feb 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 28 Aug 2028 | another 10% of any unpaid tax |
For returns filed on or after 1 April 2026. Late three times in a row and the £200 penalties become £1,000 each.
Company details
As held on the Companies House register.
- Company number
- 01017907
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 16 July 1971 (55 years ago)
- Registered office
- 2 Leman Street, London, E1W 9US
- Nature of business
- Construction of commercial buildings (SIC 41201)
- Year end
- 28 August (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 August 2025
- Last confirmation statement
- 28 October 2025
- Charges (mortgages)
- 0 outstanding of 11 registered
Filing notes for building contractors
Building companies often run the Construction Industry Scheme as a contractor, a subcontractor or both. CIS deductions suffered during the year are set against the PAYE bill, and any unrecovered balance at the year end matters when the accounts are drawn up.
Similar companies in London
Other active building contractors registered in London.
- Marlin Contract Services Limited2008
- Marmih Logistic Ltd2025
- Marpaw Build Ltd2010
- Marple Road (Offerton) Developments Limited2026
- Marpro Qual Limited2019
- Marsal Building Services Ltd2025
- Marshall Regan Ltd2002
- Mart&Kaz Contractors Ltd2022
All building contractors in London · All trades in London · Builders across the UK
Frequently asked questions
When are Marlex Securities Limited's accounts due?
Marlex Securities Limited's next accounts are due at Companies House by 28 May 2027 (in 228 days), covering the period to 28 August 2026.
When is Marlex Securities Limited's CT600 due?
The CT600 for the period to 28 August 2026 is due at HMRC by 28 August 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 29 May 2027.
Is Marlex Securities Limited still trading?
Marlex Securities Limited is listed as active on the Companies House register as of 1 Oct 2026. Active means it has not been dissolved or entered insolvency; it does not show whether it is currently taking on work.
What does Marlex Securities Limited do?
Marlex Securities Limited is registered under Construction of commercial buildings (SIC 41201).
How old is Marlex Securities Limited?
Marlex Securities Limited was incorporated on 16 July 1971, 55 years ago.
What is the penalty if Marlex Securities Limited files its accounts late?
Companies House charges £150 if the accounts are up to 1 month late, £375 up to 3 months, £750 up to 6 months and £1,500 after that, doubled if the previous year's accounts were also late. HMRC charges £200 for a CT600 filed a day late and another £200 at 3 months.
Official records
View Marlex Securities Limited on Companies House for filed documents, officers and the full history.
Based on the Companies House register (snapshot 1 Oct 2026). Deadlines are worked out from the register and assume a standard accounting period; a change of year end or a short period moves them. This page is general information, not tax or accountancy advice.