Manufacture of air and spacecraft and related machinery (SIC code 30300)
UK aerospace firms file here. The code covers airframe manufacturers, engine builders, avionics, satellites and the component suppliers that feed them. The group is small, but each customer is worth a lot. Most sit around Bristol (Filton), Derby (Rolls-Royce), and the Scottish suppliers near Lossiemouth.
1,042active UK companies list SIC 30300 among their codes on the public recordCompanies House · counts as of August 2026
SIC 30300 in numbers
1,042 companies is 0.02 per cent of the 5,190,464 active companies on the UK register. 30300 is the most used of the 3 codes we track in division 30.
891 of the 1,042 put 30300 first, and only 151 carry it as a second, third or fourth code. The code on its own is a clean filter.
ACTIVE COMPANIES BY REGISTERED-OFFICE POST TOWN (WHERE THE PAPERWORK SITS, NOT NECESSARILY THE WORK) · COMPANIES HOUSE PUBLIC RECORD, AUGUST 2026
The five busiest post towns hold 45 per cent of them and Cambridge alone 23 per cent. Selling nationally, those towns are most of the market. Selling locally outside them, expect a small pool, so cover a county or a region rather than one town.
A worked example: 30300, registered office in Cambridge, incorporated in the last ninety days, from a pool of 1,042. Each lead you get arrives with a working website and a real email, and the director's name when the record has one. If we cannot complete one, you pay nothing.
SIC 30300 companies, as leads
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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.
Related SIC codes
How to read SIC 30300
SIC 30300 reads as division 30 (manufacture of other transport equipment), group 303, class 3030, then the full five digits, inside section C, manufacturing. A company picks its own codes, up to four, and Companies House does not check them, so 30300 is the company's own description of what it does, and 891 list it first where 1,042 list it anywhere.
Who sells into division 30
Aerospace is the part of this division with the most active supplier market: precision machining, composites, certification and quality consultancy, and specialist recruitment.
About SIC 30300
Where do UK aerospace SIC 30300 firms cluster?
Four areas do most of it. Bristol, around Airbus at Filton and its supply chain. Derby, around Rolls-Royce and its supply chain. Belfast, around Spirit AeroSystems. Then the engine clusters in Lancashire and Yorkshire.
Are drone manufacturers filed under SIC 30300?
Yes, when the drone is a heavier-than-air vehicle. Smaller consumer drone makers sometimes file 26701 instead, the code for optical and photographic instruments.
Find UK SIC 30300 companies
Filter Companies House by this code. Each lead arrives with a working website and a real email, or you pay nothing. 100 free leads, no card.
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