What Pentagon Plastics Group does

Pentagon Plastics Group is a family-owned UK plastic injection moulding specialist founded in 1972 and headquartered in Horsham, West Sussex. The group operates two wholly-owned subsidiaries, Pentagon Plastics Ltd (injection moulding) and Pentagon Tooling Ltd (mould tool design, manufacture, and servicing), delivering a vertically integrated offering that spans Design for Manufacture (DFM) review, additive manufacturing prototyping via partner network, mould tool build, repeat production, and post-moulding finishing. Manufacturing is conducted at a single 17,000+ sq. ft. freehold facility equipped with 12 injection moulding presses (22 to 280 tonne clamp force, shot weights 0.5g to 500g), CNC machining centres with 4/5-axis capability, wire and spark EDM, laser welding, and CMM inspection, all under ISO 9001:2015 certification with Cyber Essentials 2026-2027 and ISO 14001 pursuit by end-2026.

The company's commercial model combines quote-based bespoke tooling projects (£2,500 for modular inserts up to £40,000+ for complex multi-cavity tools, with 3-24 week lead times) with recurring production runs from single units to 250,000+ units, complemented by preventative tool maintenance programmes that generate lifecycle service revenue. Go-to-market is sales-led and consultative, with no e-commerce or self-serve channel: customer acquisition occurs via direct engagement, the company website, and targeted industry trade shows (Interplas, Med-Tech Innovation Expo, Meet the Toolmaker), supported by content marketing across LinkedIn, YouTube, and a dedicated knowledge base.

Pentagon serves B2B customers across at least seven verticals - medical (since 1984), aerospace and aviation, defence, electrical and electronics, marine, construction, and security - with engineered thermoplastic components processed from commodity through to high-end engineering grades including PEEK, glass-filled, UV-stabilised, and flame-retardant materials. Beyond serving its own moulding customers, Pentagon Tooling provides outsourced mould tool design and manufacture to third-party plastic injection moulders, creating a second customer stream alongside its own production volumes. The firm is in second-generation leadership under Managing Director Paul Edwards (since 2011) and Operations Director Mark Sait (since 2020), with no external institutional or private equity capital.

Name

Pentagon Plastics Group

Legal name

Pentagon Plastics Group Ltd

Website

https://pentagonplastics.co.uk

Company type

Private

Founded year

1972

Operating status

Operating

Headcount range

11–50 employees

Short description

Pentagon Plastics Group is a family-owned UK plastic injection moulding and mould tooling specialist founded in 1972, serving medical, aerospace, defence, electrical, marine, construction, and security OEMs with vertically integrated design, tooling, production, and post-moulding services from its Horsham facility.

Ownership category

akta.pro rank

Product category

Plastic Injection Moulding

NAICS

All Other Plastics Product Manufacturing (326199)

SIC

Miscellaneous Plastics Products (3080)

akta.pro primary industry

Custom Injection Molding & Contract Manufacturing (Job Shops/CMs) (IMANAFAJ)

akta.pro secondary industry

Electrical & Electronics Injection Molded Components (Connectors, Housings) (IMANAFAD)

Keywords

• Plastic injection moulding
• Mould tool design
• Thermoplastic manufacturing
• Custom moulded parts
• Tooling engineering

Headquarters

HQ city

Horsham

HQ country

United Kingdom

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Personnel, Operations, Supply Chain, Technology or R&D, Infrastructure, Marketing or Sales

Revenue model

1. Injection Moulding Production: Repeat production of injection moulded thermoplastic components ranging from low volumes (1-2,000 units) to high volumes (20,000-250,000+ units). Revenue is generated on a per-unit or per-batch basis, with ordering patterns including made-to-order, scheduled call-offs, and bespoke Kanban agreements. The company provides post-moulding services (insert fitting, machining, finishing, assembly, packaging) as an added-value revenue stream.
2. Mould Tooling Design and Manufacture: Design, manufacture, and modification of mould tools including cold feed and hot runner tooling, development tools, single impression, family moulds, and multi-cavity tools. Tool costs range from £2,500 for modular insert systems up to £40,000+ for complex multi-cavity tools, with lead times varying from 3-6 weeks (development) to 10-18 weeks (multi-cavity). Tools are produced for in-house production use and as outsourced services to other plastic injection moulders.
3. Tool Maintenance and Servicing: Ongoing preventative maintenance and servicing programs for mould tools, including strip-down, cleaning, O-ring and water plug replacement, and wear assessment. This generates recurring revenue throughout the life of customer tooling.

Pricing tiers

Go-to-market motion1 record

Distribution channels2 records

Marketing channels6 records

Core offering

Pentagon Plastics Group designs and manufactures bespoke plastic injection moulds and tools, and produces injection moulded thermoplastic components for industrial customers. The group operates two complementary divisions: Pentagon Plastics Ltd (moulding) and Pentagon Tooling Ltd (tool design and build), delivering a turnkey service from concept and design for manufacture (DFM) through tooling, production, and post-moulding operations.

Product overview

Pentagon Plastics Group operates as a comprehensive plastic injection moulding and tooling solutions provider through two divisions: Pentagon Plastics Ltd provides plastic injection moulding services from design through to volume production, while Pentagon Tooling Ltd delivers mould tool design, manufacture, and lifecycle support. The company offers an integrated turnkey manufacturing solution encompassing Design for Manufacture (DFM) review, product development with additive manufacturing prototyping, mould tooling (from development tools to complex multi-cavity production tools), injection moulding (22-280 tonne presses, 0.5g-500g shot weights), and post-moulding operations (insert fitting, machining, finishing, assembly). Services are delivered from a dedicated UK facility in Horsham, West Sussex, serving sectors including medical, aerospace, defence, electrical, marine, construction, and security.

Differentiator

Problem solved

Functional benefit

Products and services

• Plastic Injection Moulding Production Contract injection moulding of thermoplastic components for industrial customers in medical, aerospace, electrical, defence, security, marine, and construction sectors. Production runs are supported by in-house tooling and an ERP-integrated quality management system (ISO 9001:2015).
• Mould Tool Design & Manufacture Design, engineering, and manufacture of bespoke plastic injection mould tools for customers who need a production-ready tool, either as part of a turnkey moulding project or as a stand-alone tooling supply.
• Design for Manufacture (DFM) Standalone design optimisation service that reviews customer part designs and refines them for manufacturability, quality, and cost efficiency ahead of tooling and production.
• Product Development End-to-end product development support, including 3D printing and additive manufacturing prototyping, to move customer concepts from idea through to a production-ready design.
• Post-Moulding Operations (Beyond The Mould) Secondary operations performed on moulded parts after they leave the injection moulding press, including finishing, assembly, and related value-added processes.
• Sub-Contract Machining & Welding Precision machining and welding services supplied on a sub-contract basis to external customers, leveraging the group's CNC machining centres, EDM, and laser welding capabilities.
• Tooling Support for External Moulders Tooling support services supplied to other moulders, drawing on the group's in-house tool build, trial, and modification capabilities.
• Repair & Modification Repair, refurbishment, and modification of plastic injection mould tools for customers whose existing tools need maintenance, upgrades, or design changes.
• Product Trials Structured product trial runs performed on customer tooling to validate tool performance and part quality before committing to full production volumes.

Quantifiable outcome

• Energy savings of 53,031 kWh per annum expected from new Haitian Zeres V injection moulding presses (replacing older equipment)
• +2 more outcomes

Named customers7 records

Segments7 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Partnerships

One partnership is on record.

• Additive Manufacturing Supply Chain PartnerssupportingTechnology or IntegrationPentagon works with select additive manufacturing partners to provide conceptual support through 3D Print (FDM), SLA, SLS, and Vacuum Casting. These partners help transform CAD data into prototype parts within short timeframes, allowing customers to test market and clarify component designs before committing to full mould tooling investment. Pentagon provides this as a managed service through their trusted network.

Scale indicators5 records

Recent moves7 records

Expansion highlights5 records

Direct peers

• Barlo Plastics: European-based custom plastic injection moulding and extrusion group with multi-site operations. Comparable to Pentagon in vertical integration of tooling and moulding, though larger and more geographically diverse.
• Rutland Plastics: UK-based custom plastic injection moulding and mould tool manufacturer offering design, tooling, and production services to industrial sectors. Closely comparable to Pentagon in size, geography, and integrated tooling + moulding model.
• Plastech Group: UK plastic injection moulding specialist serving industrial and consumer markets with tooling, moulding, and finishing capabilities. Directly comparable as a UK contract moulding business with similar vertical breadth.
• Harriman Plastics: UK contract plastic injection moulding and tooling company serving technical and industrial customers. Comparable to Pentagon as a similarly positioned mid-sized UK custom moulding business.
• Broanmain Plastics: UK-based bespoke plastic injection moulding and tooling provider with a long operating history. Comparable to Pentagon in integrated tooling + moulding service model and UK B2B customer base.
• Carville Plastics: UK-based custom injection moulding company providing tooling, moulding, and assembly across multiple industry verticals. Comparable to Pentagon as a similarly sized UK contract moulding job shop.

Broad incumbents

• EVCO Plastics: Global custom plastic injection moulding company with multiple facilities serving medical, electronics, industrial, and consumer markets. Comparable offering to Pentagon but at much larger scale and international footprint.
• Mack Group: Larger US-headquartered contract manufacturer offering plastic injection moulding alongside broader manufacturing services (moulding, stamping, machining). Comparable as an established multi-vertical contract moulder but at significantly greater scale and geographic breadth than Pentagon.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat4 records

Key risks6 records

Key highlights7 records

Customer concentration

• YouTubeyoutube.com/watch?v=JQTCJX-F4uw
• LinkedInlinkedin.com/company/pentagon-plastics-ltd
• Xx.com/pentagonpim

Compliance6 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles2 records

Subsidiaries2 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Pentagon Plastics Group