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Next accounts due

2027-09-30 (in 1y)

Last filed for 2025-12-31

Confirmation statement due

2026-10-07 (in 5mo)

Last made up 2025-09-23

Watchouts

None on the register

Cash

£27M

+63.5% highest in 4 filed years

Net assets

£63M

+26% highest in 4 filed years

Employees

388

+9.9% highest in 4 filed years

Profit before tax

£26M

+11.4% highest in 4 filed years

Accounts

5-year trend · latest reflected 2025-12-31

Metric Trend 2021-12-312022-12-312023-12-312024-12-312025-12-31
Turnover £78,723,826£89,843,761
Operating profit £22,286,241£23,193,572
Profit before tax £7,034,972£15,530,715£22,943,760£25,567,380
Net profit £6,381,890£13,328,351£18,050,679£20,540,689
Cash £3,128,730£8,250,217£16,739,494£27,366,801
Total assets less current liabilities £32,886,999£42,603,791£51,207,733£65,645,105
Net assets £32,281,657£41,610,007£50,160,686£63,201,375
Equity £34,399,767£32,281,657£41,610,007£50,160,686£63,201,375
Average employees 266309353388
Wages £14,425,438£16,850,507£19,991,911£22,450,889
Directors' remuneration £1,370,587£849,238£878,478£916,487

Values shown as filed in the company's annual accounts. indicates the figure wasn't present under that line item in that period. About these numbers

Year-on-year

FY2024 → FY2025 · period ending 2025-12-31 vs 2024-12-31

Each % is (latest − prior) ÷ |prior| for the line item as filed. The comparison is only shown when the latest and prior accounts cover broadly equal-length periods — short or long stubs (typical around incorporation or a year-end change) are suppressed rather than misrepresented. Lines a company doesn't report are omitted. About these numbers

Ratios

Computed from the line items above — sparklines read oldest → newest

Ratio Trend 2021-12-312022-12-312023-12-312024-12-312025-12-31
Operating margin 28.3%25.8%
Net margin 22.9%22.9%
Return on capital employed 43.5%35.3%
Current ratio 2.56x4.02x
Interest cover 8409.90x363.91x

Margins divide P&L lines by turnover. Gearing is liabilities over total assets. Current ratio is current assets over creditors falling due within one year. Interest cover is operating profit over absolute finance costs. Sector-distribution context coming next.

Name history

Renamed 3 times since incorporation

  1. SONARDYNE INTERNATIONAL LIMITED 1992-06-15 → present
  2. SONARDYNE (WESTERN) LIMITED 1983-03-21 → 1992-06-15
  3. SONARDYNE CONSULTANTS LIMITED 1980-12-31 → 1983-03-21
  4. SONARDYNE MARKETING LIMITED 1977-02-21 → 1980-12-31

Audit & accounting basis

Accounting basis
FRS 102
Reporting scope
Standalone (parent only)
Auditor
Azets Audit Services
Audit opinion
Unqualified (clean)
Going concern
Affirmed

“In auditing the financial statements, we have concluded that the directors' use of the going concern basis of accounting in the preparation of the financial statements is appropriate. Based on the work we have performed, we have not identified any material uncertainties relating to events or conditions that, individually or collectively, may cast significant doubt on the Company's ability to continue as a going concern for a period of at least twelve months from when the financial statements are authorised for issue.”

Group structure

  1. SONARDYNE INTERNATIONAL LIMITED · parent
    1. Sonardyne Inc. 100% · USA · Retail of electronic and mechanical equipment
    2. Sonardyne Asia PTE Limited 100% · Singapore · Retail of electronic and mechanical equipment
    3. Sonardyne Overseas Holdings Limited 100% · Holding company
    4. Sonardyne Brazil Limited 100% · Holding company
    5. Sonardyne Brasil Limitada 100% · Brasil · Retail of electronic and mechanical equipment
    6. Sonardyne GmbH 100% · Germany · Underwater innovations for engery, defence and science

Significant events

Auditor, going-concern and subsidiary information is drawn from the narrative of the latest annual accounts. About these numbers

People

7 active · 26 resigned

Name Role Appointed Born Nationality
BROWN, Graham, Dr Director 2008-10-24 Feb 1971 British
DUNN, Shaun Michael Director 2021-09-28 Feb 1973 British
FASHAM, Stephen James Director 2019-04-16 Jan 1973 British
MARTIN, Stephen Paul Director 2020-07-14 Apr 1977 British
MOYNEHAN, Gary John Scott Director 2025-03-04 Jun 1979 British
NEWBOROUGH, Darryl, Dr Director 2015-08-28 Jun 1975 British
PARTRIDGE, Simon Charles Director 2006-03-09 Nov 1970 British
Show 26 resigned officers
Name Role Appointed Resigned
CLUTTON, Roger Barry Secretary 1997-02-03 2013-10-31
PARTRIDGE, Betsan Felicity Secretary 1997-02-03
TAYLOR, Jane Elizabeth Secretary 2013-10-31 2016-11-30
BALLOCH, Robert Baird Director 2006-03-09 2014-05-06
BINKS, Richard Andrew Director 2007-10-25 2015-07-10
BINKS, Richard Andrew Director 1999-06-29 2004-09-30
BJOROY, Robin Per Director 2015-11-09 2016-04-18
BRANNAN, Cheryl Director 2015-08-01 2018-01-10
CHIBAH, Malik Director 2019-04-16 2022-04-29
CLUTTON, Roger Barry Director 1997-02-03 2014-05-04
DAVEY, Martin Director 2019-02-19 2024-12-31
DYER, Graham John Director 2014-02-07 2018-12-31
JAMIESON, Grant Director 1998-11-25 2003-11-21
KELLAND, Nigel Christopher Director 1996-11-26 2006-04-30
MOORE, Tim Director 2006-03-09 2018-12-31
NORTON, John Ralph Director 2019-10-22 2024-06-28
PARTRIDGE, Betsan Felicity Director 2019-03-12
PARTRIDGE, Charles John Director 2020-04-21
PEARCE, Christopher Dudley Director 1996-11-26 2014-03-28
POLLEY, Ian Fane Director 1994-06-22 2006-10-31
RAMSDEN, John Edward Director 2009-12-16 2021-12-31
RAYNER, Ralph Frank, Dr Director 2006-04-01 2022-05-01
RICHES, David Neil, Dr Director 1997-02-03 2014-05-24
SALMON, James Douglas Director 1998-04-05 2002-02-01
TAYLOR, Jane Elizabeth Director 2011-09-27 2016-11-30
WILLIAMS, Peter Vaughan Director 1996-11-26 2011-03-22

Ownership

Persons with significant control

Name Kind Nature of control Notified Status
Covelya Group Limited Corporate entity Shares 75–100%, Voting 75–100%, Appoints directors 2020-03-31 Active
Sonardyne Group Limited Corporate entity Shares 75–100% 2016-04-06 Ceased 2020-03-31

Filing timeline

Last 20 of 180 total filings

Date Type Category Description
2026-04-02 AA accounts Accounts with accounts type full
2026-02-23 MR04 mortgage Mortgage satisfy charge full PDF
2025-10-24 CH01 officers Change person director company with change date PDF
2025-09-24 CS01 confirmation-statement Confirmation statement with no updates PDF
2025-09-04 AA accounts Accounts with accounts type full
2025-03-06 AP01 officers Appoint person director company with name date PDF
2025-02-11 CS01 confirmation-statement Confirmation statement with no updates PDF
2025-01-13 TM01 officers Termination director company with name termination date PDF
2024-09-27 AA accounts Accounts with accounts type full PDF
2024-07-29 MR01 mortgage Mortgage create with deed with charge number charge creation date PDF
2024-07-11 TM01 officers Termination director company with name termination date PDF
2024-02-22 CS01 confirmation-statement Confirmation statement with no updates PDF
2023-10-09 AA accounts Accounts with accounts type full
2023-02-17 CS01 confirmation-statement Confirmation statement with updates PDF
2022-10-06 AA accounts Accounts with accounts type full
2022-09-02 CH01 officers Change person director company with change date PDF
2022-05-10 TM01 officers Termination director company with name termination date PDF
2022-05-05 TM01 officers Termination director company with name termination date PDF
2022-02-23 CS01 confirmation-statement Confirmation statement with updates PDF
2022-01-11 TM01 officers Termination director company with name termination date PDF

Public-record activity

Raw counts from Companies House — last 12–24 months

Filings
5

last 12 months

Capital events
0

last 24 months

Officers appointed
0

last 12 months

Officers resigned
0

last 12 months

Direct counts from the register. No score, no rating — see the Filing timeline for the underlying events.

Official Companies House page