Manufacture of other transport equipment (SIC division 30)
Division 30 of the UK SIC 2007 list. It holds 3 codes, listed in full below with the number of active UK companies filed under each.
What sits in division 30
Everything that moves except cars and lorries. Air and spacecraft, 30300, is the largest code, followed by the catch-all 30990 and pleasure boat building at 30120. Shipbuilding and rolling stock sit below the threshold in company terms, which is what you would expect of industries with a handful of very large employers rather than many small ones.
Aerospace is the part of this division with the most active supplier market: precision machining, composites, certification and quality consultancy, and specialist recruitment. Boat building is a different world with its own buyers of marine hardware, resins and rigging. The two rarely overlap, so treat 30300 and 30120 as separate markets rather than one division. Aerospace clusters visibly around Bristol and the south west, and boat building around the south coast.
How to read a division 30 code
A UK SIC code is five digits and division 30 is the first two of them. Everything filed under 30 shares those digits: all 3 codes below begin 30, then the third digit narrows to a group, the fourth to a class and the fifth to the subclass a company actually picks. Division 30 sits inside section C, manufacturing, which is the broadest tier of the classification. So a code is read left to right, from an industry down to a specific activity.
More on how division 30 codes are built
Companies choose their own codes at incorporation and can change them on any confirmation statement, and Companies House does not check the answer. A company may list up to four. That is worth knowing before you treat any division total as a headcount: the numbers here are what companies said about themselves, on the August 2026 register, and the largest single code in this division is 30300, manufacture of air and spacecraft and related machinery.
Working division 30 as a list
Division 30 holds 3 codes and 2,686 active companies between them. 30300 is the largest at 39 per cent and the other 2 codes account for the rest. That is balanced enough that the division is a reasonable unit to work, though the leading code alone will usually give you a cleaner list.
More on working division 30
A caveat that matters more in some divisions than others: a company may register up to four SIC codes, and the figures below count every position, not just the first. A business filed under two codes in this division appears under both. Treat the totals as reach rather than a headcount, and if you need a clean list, filter to companies whose FIRST code sits in the division. 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.
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Division 30 companies, as leads
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Division 30 questions
Are aerospace maintenance companies in 30300?
Not usually. 30300 is manufacture of air and spacecraft. Maintenance, repair and overhaul normally sits in 33160, repair and maintenance of aircraft and spacecraft, in division 33. Suppliers who serve both should pull the two codes together, since the customer base overlaps heavily.
Where do caravan and motorhome builders sit?
In 30200 or 30990 depending on the build, though caravan manufacture specifically has its own code at 29200 for bodies and trailers. It is one of the messier corners of the classification and companies split across several codes, so match on any position and expect to tidy the list by hand.
Find companies across division 30
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