£21k
+45%vs Apr 2025Active15215888Private limited companySurbiton
CALVERT PETROPHYSICS LIMITED
Significant control: Stefan Eric Edward Calvert (75–100%)
From public filings as at 31 Aug 2026; may contain errors or be out of date. Verify at Companies House · Terms
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What does Calvert Petrophysics Limited sell?
Registered activity: Extraction of crude petroleum (SIC 06100). We’re building product and service lists for UK companies. Get this one when it’s ready.
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01
Summary
CALVERT PETROPHYSICS LIMITED is an active private limited company (company number 15215888) incorporated on 17 October 2023, registered in Surbiton. Its registered activity is extraction of crude petroleum (SIC 06100). Latest small accounts cover the period ending 30 April 2026, showing net assets of £21k and cash of £43k, with 1 employee on average. Net assets rose 45% on the prior period (£15k).
Peer position · net assets
By net assets it sits in the upper half of 544 comparable companies in the UK (median £1,526, upper quartile £52k).
02
Ownership and control
- Mr Stefan Eric Edward Calvert
- owns 75–100% of shares
- holds 75–100% of voting rights
- can appoint or remove directors
Persons with significant control hold 25% or more of shares or voting rights. Smaller shareholdings are only listed in confirmation-statement documents. Directors and secretaries: see the officers list at Companies House.
03
Key dates
- Incorporated
- 17 October 20233 yrs ago
- Next accounts due
- 30 January 2028in 458 days
- Confirmation statement due
- 31 October 2026in 2 days
Due dates are expected from Companies House filing rules; confirm on the official register before relying on them.
04
Activity
- SIC 06100
- Extraction of crude petroleum
- SIC 09100
- Support activities for petroleum and natural gas mining
- Accounts type
- Total Exemption Full
- Size band
- MicroCompanies Act thresholds
05
Financials
£43k
−19%vs Apr 2025Not reported
1
No changevs Apr 2025| Period end | Net assets | Cash | Debtors | Creditors <1y | Turnover | Profit | Employees |
|---|---|---|---|---|---|---|---|
| 30 April 2026 | £21k | £43k | £19k | — | — | — | 1 |
| 30 April 2025 | £15k | £53k | £20k | — | — | — | 1 |
Cash per employee£43kCash ÷ average employees
Figures as filed in iXBRL accounts at Companies House. "—" means the line was not reported in that filing.
06
Filing and accounts signals
- Net assets above zeroNet assets £21,398 at 30 April 2026
- Net assets up 10% or more on the prior period+45.5% vs prior period
- Incorporated two to five years agoIncorporated 17 October 2023
Neutral facts read from the register and filed accounts, each with its evidence. They are not a rating, a prediction or advice, and may be incomplete or out of date. How each signal is derived.
07
Timeline
- Next accounts duein 458 days
- Confirmation statement duein 2 days
- Accounts period endNet assets £21k · small accounts
- Accounts period endNet assets £15k · small accounts
- Incorporated
08
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All companies incorporated on 17 October 2023 · in Oct 2023.
09
Reminders for CALVERT PETROPHYSICS LIMITED
Get an email before each filing deadline — accounts and confirmation statement — so nothing is late.