Company lists · Data refreshed September 2026

Top 25 As9100 certified manufacturers based in the United Kingdom

Name: As9100 certified manufacturers based in the United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 30, 2026 177 companies tracked

RevenueBase identified 177 as9100 certified manufacturers headquartered in the United Kingdom as of September 2026 and tracks 2,946 professional contacts across them, including 897 with verified work emails. Bristol is the largest hub.

This list covers as9100 certified manufacturers headquartered in the United Kingdom, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 30, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 30, 2026 86% judged on-target in blind review

177Companies

2,946Contacts tracked

897Verified emails

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The 25 largest as9100 certified manufacturers based in the United Kingdom

Ranked by team size

Top 25 of 177 as9100 certified manufacturers based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 30, 2026. RevenueBase Smart Search rates how each company's information relates to as9100 certified manufacturers: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Accrofab	Partial evidence	Derby, United KingdomHQ checked Sep 30, 2026	201-500	184 contacts →
	Partial evidence “Accrofab are a class-leading manufacturer of precision fabricated and machined parts for the aerospace, defence and power generation industries.” Source: RevenueBase Database · checked Sep 30, 2026
2	SIGMA	Partial evidence	Hinckley, United KingdomHQ checked Sep 30, 2026	201-500	82 contacts →
	Partial evidence “Sigma is a leading manufacturer of aerospace pipe & tube assemblies, ducts, manifolds, fabrications & sub-assemblies, sheet & machined details, and specialist fasteners.” Source: RevenueBase Database · checked Sep 30, 2026
3	JJ Churchill LTD	Indirect evidence	Nuneaton, United KingdomHQ checked Sep 30, 2026	51-200	81 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 30, 2026
4	Aerotron Composites LTD	Indirect evidence	Chatteris, United KingdomHQ checked Sep 30, 2026	51-200	81 contacts →
	Indirect evidence “Aerotron Composites Ltd has a wide range of expertise and experience in designing and creating composites structures, utilising a full range of capabilities from product design…” Source: RevenueBase Database · checked Sep 30, 2026
5	Senior Aerospace Weston	Indirect evidence	Earby, United KingdomHQ checked Sep 30, 2026	201-500	71 contacts →
	Indirect evidence “Senior Aerospace Weston, located in Lancashire, England, is a leading supplier of a wide range of complex precision machined components, and sub- assemblies for original equipment…” Source: RevenueBase Database · checked Sep 30, 2026
6	Brookhouse Aerospace Limited	Partial evidence	Darwen, United KingdomHQ checked Sep 30, 2026	51-200	64 contacts →
	Partial evidence “Brookhouse Aerospace Limited manufactures a range of composite structures, producing monolithic and sandwich parts from a range of materials, including carbon fibre, glass and…” Source: RevenueBase Database · checked Sep 30, 2026
7	Rotec Aerospace Limited	Indirect evidence	Evesham, United KingdomHQ checked Sep 30, 2026	11-50	53 contacts →
	Indirect evidence “Rotec specialises in complex 3, 4 and 5 Axis alongside the latest Slidinghead technology, with the capability to machine in a variety of exotic and conventional materials.” Source: RevenueBase Database · checked Sep 30, 2026
8	Midland Aerospace	Indirect evidence	Sutton-in-ashfield, United KingdomHQ checked Sep 30, 2026	51-200	49 contacts →
	Indirect evidence “Midland aerospace part of the pan-European engineering group Calder Precision is a dynamic company based on the skills and knowledge of an exceptional workforce.” Source: RevenueBase Database · checked Sep 30, 2026
9	Bowmill Engineering LTD	Indirect evidence	Poole, United KingdomHQ checked Sep 30, 2026	51-200	48 contacts →
	Indirect evidence “Bowmill Engineering provide peerless precision engineering to the highest standards for the aerospace sector and other industries.” Source: RevenueBase Database · checked Sep 30, 2026
10	Currock Engineering Company Limited	Indirect evidence	Chelmsford, United KingdomHQ checked Sep 30, 2026	51-200	48 contacts →
	Indirect evidence “Currock Engineering Company Limited is a Precision Engineering company, Established in 1964, based out of Unit 9-11 Tattersall Way, Widford Industrial Estate, Chelmsford, ESSEX…” Source: RevenueBase Database · checked Sep 30, 2026
11	JK Engineering	Indirect evidence	Kings Langley, United KingdomHQ checked Sep 30, 2026	51-200	48 contacts →
	Indirect evidence “JK Engineering is a state of the art manufacturing company producing the highest quality components for sectors such as aerospace, medical, motorsport and defence.” Source: RevenueBase Database · checked Sep 30, 2026
12	Cornelius Electronics LTD	Strong evidence	Port Talbot, United KingdomHQ checked Sep 30, 2026	201-500	44 contacts →
	Strong evidence “Cornelius Electronics is an AS9100 sub-contract manufacturer supporting OEMs, machine builders and business owners worldwide who have a demand for a reliable, long term…” Source: RevenueBase Database · checked Sep 30, 2026
13	Aero Fabrications Limited	Indirect evidence	Watnall, United KingdomHQ checked Sep 30, 2026	201-500	44 contacts →
	Indirect evidence “Aero Fabrications Limited is a privately owned business located in the heart of the United Kingdom.” Source: RevenueBase Database · checked Sep 30, 2026
14	Senior Flexonics	Partial evidence	Lymington, United KingdomHQ checked Sep 30, 2026	51-200	43 contacts →
	Partial evidence “Lymington Precision Engineers is a leading manufacturer of precision machined components, assemblies and kit sets for the Oil and Gas, Telecommunications, Aerospace and Defence…” Source: RevenueBase Database · checked Sep 30, 2026
15	Middlesex Aerospace	Indirect evidence	Basingstoke, United KingdomHQ checked Sep 30, 2026	51-200	43 contacts →
	Indirect evidence “Middlesex Aerospace are a leading engineering and strategic manufacturing company.” Source: RevenueBase Database · checked Sep 30, 2026
16	Martin Precision	Indirect evidence	Lanark, United KingdomHQ checked Sep 30, 2026	51-200	43 contacts →
	Indirect evidence “Martin Precision serves as a vital link in the supply chain to some of the world’s best-known companies.” Source: RevenueBase Database · checked Sep 30, 2026
17	Senior Aerospace Thermal Engineering	Partial evidence	Royston, United KingdomHQ checked Sep 30, 2026	51-200	36 contacts →
	Partial evidence “Senior Aerospace Thermal Engineering is a leading aerospace components manufacturer, supplying aero engines and airframe” Source: RevenueBase Database · checked Sep 30, 2026
18	Mellish IS An API Qualified Company 20e & 20f	Strong evidence	Aldridge, United KingdomHQ checked Sep 30, 2026	51-200	35 contacts →
	Strong evidence “Mellish Engineering Services Limited is an API Q1 and ISO 9001:2015 certified fastener manufacturer specializing in safety critical fasteners and machined components.” Source: RevenueBase Database · checked Sep 30, 2026
19	Geometric Manufacturing LTD	Indirect evidence	Tewkesbury, United KingdomHQ checked Sep 30, 2026	51-200	34 contacts →
	Indirect evidence “Geometric Manufacturing provides a flexible solution to your production requirements.” Source: RevenueBase Database · checked Sep 30, 2026
20	Datum Tool Design	Partial evidence	Lisburn, United KingdomHQ checked Sep 30, 2026	51-200	31 contacts →
	Partial evidence “Datum Tool Design is a UK based aerospace tooling engineering company supporting global aerospace manufacturers” Source: RevenueBase Database · checked Sep 30, 2026
21	Active Electronics PLC	Indirect evidence	High Wycombe, United KingdomHQ checked Sep 30, 2026	11-50	30 contacts →
	Indirect evidence “Active Electronics PLC was established in 1974 and has become a leading Service Provider for electronic components and assemblies to the Aerospace, Defence and Hi-Rel Industries.” Source: RevenueBase Database · checked Sep 30, 2026
22	Q-Mass	Indirect evidence	East Kilbride, United KingdomHQ checked Sep 30, 2026	11-50	30 contacts →
	Indirect evidence “Q-Mass is an innovative leader in CNC precision machining manufacturing and service solutions.” Source: RevenueBase Database · checked Sep 30, 2026
23	SGA Technologies Limited	Partial evidence	Saffron Walden, United KingdomHQ checked Sep 30, 2026	51-200	29 contacts →
	Partial evidence “When your application demands zero failure, you need a manufacturer you can trust completely.” Source: RevenueBase Database · checked Sep 30, 2026
24	WG Jones Limited	Indirect evidence	Verwood, United KingdomHQ checked Sep 30, 2026	51-200	29 contacts →
	Indirect evidence “WG Jones was established in 1975 and has been under current ownership since 1982.” Source: RevenueBase Database · checked Sep 30, 2026
25	Helander Precision Engineering	Partial evidence	Tewkesbury, United KingdomHQ checked Sep 30, 2026	51-200	28 contacts →
	Partial evidence “Helander Precision Engineering is a leading UK‑based manufacturer of complex, high‑precision, and mission‑critical components for global OEMs and tiered suppliers across the…” Source: RevenueBase Database · checked Sep 30, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: as9100 certified manufacturers. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names as9100 certified manufacturers.
Partial evidence: Its own public description names part of as9100 certified manufacturers, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name as9100 certified manufacturers. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 177 as9100 certified manufacturers based in the United Kingdom

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As9100 certified manufacturers based in the United Kingdom at a glance

As of Sep 30, 2026

30.4%Verified-email coverage

16.6Average contacts per company

11-50Median size (employees)

2.8%Largest-city concentration · Bristol

Sep 30, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

Email recency for this list is measured worldwide rather than for United Kingdom, so it is reported there. Company counts and contact totals on this page are exact for United Kingdom, over 177 companies.

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among as9100 certified manufacturers, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in the United Kingdom whose own description of what they do matches “as9100 certified manufacturers”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names as9100 certified manufacturers), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among as9100 certified manufacturers, and records with no verified work email. Companies headquartered outside United Kingdom are excluded even when they keep an office there.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
Ranking: Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification: Every listed company carries at least one verified work email, 897 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh: This page's figures were pulled from the company graph on September 30, 2026. Lists refresh periodically as the graph is re-checked.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names as9100 certified manufacturers, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many as9100 certified manufacturers are there based in the United Kingdom?

RevenueBase identified 177 as9100 certified manufacturers headquartered in the United Kingdom as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

Accrofab, headquartered in Derby, tops this list with the largest team on record.

Which city has the most as9100 certified manufacturers?

Bristol leads with 5 headquartered companies, followed by Poole (5) and Basildon (4).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 897 verified decision-maker contacts tracked across these 177 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 30, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.