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SD

STS Defence

Radio & TV equipment · Gosport
SME

STS Defence is a UK-based engineering and technology company specializing in mission-critical, secure communications and networks, electronic warfare, and instrumentation systems. They operate primarily in the Naval and Air Defence markets, delivering innovative solutions and programmes.

sts-defence.com ↗

Summary from the supplier’s website — unverified

Compare peers
Awarded
£20.8m
Live
10
Buyers
3
12m
£13.0m
At a glance
  • Quick answer
Profile
  • Social value
  • ESG & policies
  • Capabilities3
  • Buyer references
  • Accreditations
Track record · verified
  • KPI performance
  • Contracts10 / 16
  • Top buyers3
  • Category mix
  • Geography
  • Peers5
Trust & risk
  • Red flags0
  • Compliance
  • Modifications
  • News
Company
  • Companies House
  • Financial
  • Org tree
Quick answer — STS DefenceUpdated 06 Jul 2026

At a glance · for buyers and watchdogs

STS Defence has won £20.8m across 3 public-sector buyers, with 10 live contracts. No active Companies House risk flags.

Why: top buyer Ministry of Defence, DIO, at 98% · 100% in Radio & TV equipment · 0 active risk flags · 0 modifications.

Decision signals
0Active red flags
ActiveCompany status
10 of 16Live contracts
98%Top-buyer concentration
100%Category exposure
0Contract modifications
If you're a buyer:CapabilitiesReferencesKPIComplianceWatchdog?FlagsModificationsConcentrationNews

Social value

Commitments mapped to the Government Social Value Model themes.

⚑ Self-reported
—

No social-value commitments yet

Jobs, skills, environmental, inequality and community commitments appear here once a claimed supplier attributes them to awarded contracts, or once we detect them on the supplier’s website.

ESG & policies vault · 0/5

Key governance & sustainability policies. Published documents link out; missing ones are greyed.

↔ Cross-checked
Net-zero planNot provided✓
Modern slavery statementNot provided✓
EDI policyNot provided✓
Anti-briberyNot provided✓
Data protectionNot provided✓

Capabilities

What this supplier does, where they sit, who they sell to.

◐ From website & notices
Sectors served · 1/8
Central government✓
Local government✓
NHS & health✓
Housing✓
Utilities & energy✓
Financial services✓
Education✓
Defence✓
Services · 5
Design and ManufactureDesigning and assembling equipment and systems for naval and air defence. ↗Integration and SupportIntegrating and supporting capability through-life. ↗Training and EducationTraining the next generation of civil and military nuclear engineers. ↗UHF Satellite CommunicationsDelivering and supporting mission-critical UHF satellite communications systems. ↗Water-cooled CabinetsDeveloping rugged cabinets for housing IT systems in confined spaces. ↗
Frameworks & DPS · 3 from notices
  • Production and Installation of Integrated UHF SATCOM & EFMTE 4.2 Baseline Equipment (which consist of bespoke integrated satellite communications equipment) for the Royal Navy's Type 26 Ships 2 & 3Ministry of Defence, DIO, · £4.3m
  • Sensor Channel Health Check - Contract Award Notice - CFMinistry of Defence, DIO, · £248k
  • TEPMT Enabling FrameworkMinistry of Defence, DIO, · £22k

Extracted automatically from sts-defence.com on Jul 2026. Not independently verified — treat as the supplier’s own marketing claims.

Case studies · 5

Delivery stories from the supplier’s website. Clients are not yet cross-checked against award records.

◐ From supplier website
Water-cooled cabinets for the Royal NavyDeveloped a Tempest-approved, water-cooled cabinet to house network components within a confined space on submarines. ↗UHF Satellite CommunicationsEnsured high system availability for critical voice and data communications on naval platforms. ↗Nuclear training for Babcock MarineProvided nuclear training solutions. ↗Astute and Vanguard Class InstallationInstallation services for Astute and Vanguard class submarines. ↗Training solution for Aquila ATMSProvided training solutions for Aquila ATMS. ↗

Extracted automatically from sts-defence.com on Jul 2026. Not independently verified — treat as the supplier’s own marketing claims.

Buyer references

Named public-sector contacts who have agreed to act as a reference.

✓ Confirmed by buyer
—

No buyer references yet

Public-sector buyers can confirm they'll act as a reference for this supplier. Confirmed references — with the contract they relate to — show here.

Accreditations & memberships

Independently issued. Verification dates cross-checked against issuer registers.

↔ Cross-checked
—

No accreditations recorded

B-Corp, ISO, Cyber Essentials, Living Wage and similar credentials appear here once added by a claimed supplier and cross-checked against the issuing register.

KPI performance

Delivery, budget and satisfaction scores reported quarterly by buyers.

✓ Verified
84

No verified KPI scores yet

Once buyers report contract KPIs — delivery on time, on budget, satisfaction, adoption and accessibility — a weighted grade and breakdown appear here.

Contracts · 10 live · 6 historic

Pulled from Contracts Finder & Find a Tender. Most recent first.

✓ From notices
TitleBuyerCPVAwardedValueTermStatus
Production and Installation of Integrated UHF SATCOM & EFMTE 4.2 Baseline Equipment for the Royal Navy's Type 26 Batch 2 Ships
Ministry of Defence, DIO,3253100004 Nov 2025£13.0m7.5 yrsLive
Production and Installation of Integrated UHF SATCOM & EFMTE 4.2 Baseline Equipment (which consist of bespoke integrated satellite communications equipment) for the Royal Navy's Type 26 Ships 2 & 3
Ministry of Defence, DIO,3253000009 Oct 2023£4.3m4 yrsLive
Provision of External Communications (ECS) UHF Satcom & Project solution for Combat Systems Development and Integration Facility (CSDIF)
Ministry of Defence, DIO,3234421025 May 2023£2.0m10 moClosed
Sensor Channel Health Check - Contract Award Notice - CF
Ministry of Defence, DIO,3551200001 Apr 2022£248k8 moClosed
Water Cooled Enclosures for Type 26 Frigates
Ministry of Defence, DIO,3023310022 Jun 2021£789k2 yrsClosed
TEPMT Enabling Framework
Ministry of Defence, DIO,4526266008 Dec 2020£22k11 moClosed
Manufacture of Bulk Module Storage (BMS) Containers
Ministry of Defence, Weapons, Lightweight Missile Attack Systems Project Team (LMAS PT)4461340001 Dec 2020£451k13 moClosed
Buoy parts
Met Office3810000027 Jun 2016£15k3 moClosed
Untitled
Ministry of Defence, DIO,————Live
Repair of Modular Support Units for the Fleet Air Arm - Contract Details Notice
Ministry of Defence, DIO,————Live
Total live value £17.2m · mean award £1.3m1–10 of 16

Top buyers · 3 buyers · top 3 = 100%

Share of awarded value. Concentration fires above 40% for any single buyer.

✓ From notices
1
Ministry of Defence, DIO,
14 contracts
98%
since 2020
2
Ministry of Defence, Weapons, Lightweight Missile Attack Systems Project Team (LMAS PT)
1 contract
2%
since 2020
3
Met Office
1 contract
0%
since 2016

Category mix

CPV-division share of last-12m awarded value. Single-category exposure: 100%.

✓ From notices
Radio & TV equipment32
100%
⚠ Concentration: 100% of recent awarded value sits in a single CPV division. A category-specific downturn would materially affect revenue.

Geography

Distribution of awarded value by buyer region.

✓ From notices
UK · schematic only
South West1 contract
100%
Region resolved for 0% of awarded value (by buyer postcode); the remainder lacks a usable address.

Peers

Suppliers with overlapping CPVs & buyers (last 24m). STS Defence highlighted.

✓ From notices
SupplierSME?Awarded · 24mContracts
TC
Topcoat Construction Limited / TCL Group
Yes£67.6m2
IW
Ian Williams
No£67.6m2
WH
Westone Housing
Yes£67.6m3
ER
EQUANS Regeneration Limited
No£67.6m2
CH
C Hanlon Facilities Management Ltd
Yes£67.6m2
SD
STS Defence
Yes£13.0m—
Compare peers →

Red flags · 0 active

Automated scan of Companies House status, charges and insolvency records.

✓ Verified
✓ Clean. No active risk signals from Companies House status, charges or insolvency records.

Compliance scorecard

Derived from Companies House filings — not a full supplier-assurance check.

↔ Cross-checked
Trading status
Active
Live at Companies House
Annual accounts
Up to date
Last made up to 31 Dec 2025
Confirmation statement
Up to date
Next due 26 Mar 2027
Outstanding charges
0
No charges registered
Insolvency history
None
No insolvency cases registered
Certifications (ISO, Cyber Essentials, Living Wage, B-Corp, modern-slavery) are supplier self-reported and appear once a claimed profile adds them.

Modifications

Variations to awarded contracts logged under Procurement Act 2023 s.74.

✓ From notices
±

No modifications recorded

No published contract variations for this supplier. Modification notices appear here as they are issued under the Procurement Act 2023.

News mentions

UK trade press & nationals, matched to this supplier.

◰

No news mentions found

We haven't matched any recent UK press coverage to this supplier. Mentions appear here automatically as they're published.

Companies House

Live sync — registered details, directors, PSC and SIC codes.

✓ Live sync

Registered details

Company no.
03193298
Status
Active
Type
Private limited
Incorporated
01 May 1996
Reg. office
Sts Defence Limited, Mumby Road, Gosport, PO12 1AF
SIC codes
32990 · 43210 · 61900 · 84220
Last accounts
31 Dec 2025
Next accounts due
30 Sept 2027

Directors & PSC

  • NEUMANN, Peter — director
    Appointed 24 Feb 2026
  • ELSHAW, Neil Raymond — director
    Appointed 31 Dec 2025
  • GARRITY, David James, Dr — director
    Appointed 31 Dec 2025
  • PRIOR, John Richard — director
    Appointed 31 Dec 2025
  • STANCLIFFE, Ben — director
    Appointed 20 May 2024
  • CARTY, David — secretary
    Appointed 20 May 2024
  • Cicor Uk Ltd — person with significant control
    ownership of shares 75 to 100 percent

Financial

Filed accounts from Companies House.

↔ From Cos House
£

No financial filings on record

Turnover, profit and headcount appear here once audited or micro-entity accounts are filed at Companies House.

Org tree

Group structure and ownership.

↔ From Cos House
STS DEFENCE LIMITED
03193298 · this company

Independent. No parent company or subsidiaries recorded at Companies House for this entity.