Active15135372Private limited companyLondon

HARMONIC SECURITY LIMITED

D35/100

Summary

Generated from filed data · no estimates

HARMONIC SECURITY LIMITED is an active private limited company (company number 15135372) incorporated on 13 September 2023, registered in London. Its registered activity is information technology consultancy activities (SIC 62020). Latest small accounts cover the period ending 30 September 2025, showing net assets of −£7.92m and cash of £154k, with 23 employees on average. Net assets fell 171% on the prior period (−£2.93m).

Peer position · net assets

By net assets it sits in the bottom quarter of 19,391 comparable companies in London (median £3,248, upper quartile £35k).

Key dates

Incorporated: 13 September 20233 yrs ago
Next accounts due: 30 June 2027in 251 days
Confirmation statement due: 27 September 2027in 340 days

Due dates are expected from Companies House filing rules; confirm on the official register before relying on them.

Activity

SIC 62020: Information technology consultancy activities
Accounts type: Total Exemption Full
Size band: MicroCompanies Act thresholds

Financials

2 periods on record · latest ending 30 September 2025

Net assets

−£7.92m

vs Sept 2024

Cash at bank

£154k

+689%vs Sept 2024

Turnover

Not reported

Employees

+77%vs Sept 2024

Net assets

−£7.92m

Cash at bank

£154k

Average employees

Filed accounts by period, newest first
Period end	Net assets	Cash	Debtors	Creditors <1y	Turnover	Profit	Employees
30 September 2025	−£7.92m	£154k	£1.06m	—	—	—	23
30 September 2024	−£2.93m	£20k	£214k	—	—	—	13

Cash per employee£6,691Cash ÷ average employees

Figures as filed in iXBRL accounts at Companies House. "—" means the line was not reported in that filing.

Firmoscan score

Rules-based · every point shows its evidence

35 / 100 · grade D

Score breakdown
50	Starting scoreEvery scored company starts here
−15	Negative net assetsNet assets £-7,918,654 at 2025-09-30
−8	Net assets falling-170.7% vs prior period
+4	Cash reservesCash £153,895
+4	Past first filingsIncorporated 2023-09-13
35	Score, grade D

A transparent, rules-based score from filed data only: every point lists its evidence. It is not a credit rating or advice. How the score is computed.

Ownership and control

2 active

AE
Mr Alastair Ewan Paterson
Individual · since 13 September 2023
- owns 25–50% of shares
- holds 25–50% of voting rights
25–50%
BW
Mr Bryan Woolgar-O'Neil
Individual · since 13 September 2023
- owns 25–50% of shares
- holds 25–50% of voting rights
25–50%

Persons with significant control hold 25% or more of shares or voting rights. Smaller shareholdings are only listed in confirmation-statement documents.

Timeline

Newest first

27 Sept 2027Confirmation statement duein 340 days
30 Jun 2027Next accounts duein 251 days
30 Sept 2025Accounts period endNet liabilities £7.92m · small accounts
30 Sept 2024Accounts period endNet liabilities £2.93m · small accounts
13 Sept 2023Incorporated

Similar companies in London

Same activity (information technology consultancy activities), closest in incorporation date

All companies incorporated on 13 September 2023 · in Sept 2023.

Reminders for HARMONIC SECURITY LIMITED

Get an email before each filing deadline — accounts and confirmation statement — so nothing is late.