UK SIC 2007 · 25610
Treatment and coating of metals (SIC code 25610)
Treatment and coating of metals is UK SIC code 25610. It sits in division 25 (Manufacture of fabricated metal products, except machinery and equipment) of the SIC 2007 list. On the August 2026 Companies House register, 1,198 active UK companies list 25610 among their SIC codes. 1,076 of them list it first.
This is the UK's metalworking division. The biggest group sits under 25990, the catch-all for fabricated metal products. Next comes 25110 for structural steelwork firms, who make frames, balconies and architectural metalwork. Then 25620 for precision machining shops running CNC mills and lathes. Together those codes cover most general fabricators, welders with premises and subcontract engineering shops. Machinery itself is not in this division. It belongs in 28. That line catches out a lot of engineering companies when they register.
Who prospects SIC 25610 companies
The skills shortage decides who sells into this division. Engineering recruiters mine it for firms that will need welders, fabricators and machinists. Headcount growth and new contract wins are their trigger. Steel stockholders, consumables suppliers, machine tool dealers and calibration services use the same lists. Structural steel firms under 25110 pull in construction-side sellers, from estimating software to CE marking consultants. A new fabricator has usually just come off the tools. They leave a job with a customer or two lined up. Insurance, kit finance and a decent website are all needed fast.
Lead generation for recruiters →How to read SIC 25610
SIC 25610 is a five-digit code, and the digits are not arbitrary. The first two, 25, are the division, manufacture of fabricated metal products, except machinery and equipment. Add the third and you have group 256; the fourth narrows it to a class, and the fifth to the subclass, which is the level Companies House actually asks a company to pick. The whole division sits under section C, manufacturing, the broadest tier there is. Reading a code left to right therefore goes from a whole sector down to one activity.
More on how SIC 25610 is built
A company chooses its own codes when it incorporates and can change them on any confirmation statement. It may list up to four, and Companies House does not check whether they are right. That is why 25610 is worth reading as a claim the company made about itself rather than as a verified fact, and why the first-position and any-position counts above differ.
Measured on the August 2026 register, the busiest registered-office post towns for 25610 are London (46), Birmingham (42), West Midlands (25), Sheffield (19) and Nottingham (15). Those are registered-office locations, which is where the paperwork sits rather than necessarily where the work happens, so treat them as where to start looking rather than as a service area.
Using SIC 25610 as a filter
1,198 companies is 0.02 per cent of the 5,190,464 active companies on the UK register, and ranks 25610 5th most used of the 6 codes we track in division 25. That is the pool before any filter. Whether it is a big market for you depends on what you sell, but it is the number every other filter on this page cuts down from.
More on filtering by SIC 25610
Almost everybody who uses 25610 means it: 1,076 of 1,198 companies put it first, leaving only 122 carrying it as a secondary code. That makes it an unusually clean filter. You can match on the code alone and trust that the companies you get really are in this line of work.
These companies are spread out. London is the largest single cluster at 4 per cent and the top five post towns together hold only 12 per cent, so the remaining 88 per cent sits across the rest of the country. A regional filter narrows this list without gutting it, which makes it a reasonable code to work territory by territory.
In practice the code on its own is rarely the whole filter. Pair 25610 with an incorporation date to catch companies in their first months, when they are still choosing suppliers, or with a filing deadline to reach them while the year end is on their mind. A worked example for this code: 25610, registered office in London, incorporated in the last ninety days, which turns a 1,198 company pool into a list you can write to in an afternoon. Add the poor-website filter if what you sell is a website, or a recent change of officer if you sell to whoever just took the job. Every company you pull carries the Companies House record, the director's name, a verified website and a verified email, and the ones we cannot complete are not charged.
Where SIC 25610 clusters in the UK
ACTIVE COMPANIES BY REGISTERED-OFFICE POST TOWN · COMPANIES HOUSE REGISTER, AUGUST 2026
SIC 25610 companies, as leads
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About SIC 25610
How many UK companies use SIC code 25610?
1,198 active UK companies list 25610 (Treatment and coating of metals) among their registered SIC codes. Each company may register up to four. Of those, 1,076 put it first. The figures come from the August 2026 Companies House register snapshot, and count active companies only.
Should an engineering workshop register under 25620 machining or a division 28 machinery code?
Ask what leaves the building. If you machine components, 25620 is right, whether the parts go to aerospace, automotive or general industry. Customers may call you an engineering firm anyway. Division 28 is for companies whose finished product is a machine. Subcontract shops nearly always belong in 25. If you are unsure, list the code that matches most of your revenue. You can change it later on a confirmation statement.
Does a steel fabricator that also installs on site need a construction SIC code?
It is worth adding one. Fabrication belongs under 25110. Erecting structural steel on site has its own construction code. Listing both paints an accurate picture for insurers, main contractors and prequalification schemes that read the public record. A company can hold up to four codes from any mix of divisions. Declare them at incorporation, or amend them on the CS01 confirmation statement.
Find UK SIC 25610 companies
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