Manufacture of basic pharmaceutical products (SIC code 21100)
Manufacture of basic pharmaceutical products is UK SIC code 21100. It sits in division 21 (Manufacture of basic pharmaceutical products and pharmaceutical preparations) of the SIC 2007 list. On the August 2026 Companies House register, 1,275 active UK companies list 21100 among their SIC codes. 1,090 of them list it first. That makes it the most used code in its division.
1,275active UK companies list SIC 21100 among their codes on the public recordCompanies House · counts as of August 2026
SIC 21100 in numbers
1,275 companies is 0.02 per cent of the 5,190,464 active companies on the UK register. 21100 is the most used of the 2 codes we track in division 21.
1,090 put 21100 first and 185, 15 per cent, list it in one of their other three slots. First code only gives the tighter list; any position gives more of them.
ACTIVE COMPANIES BY REGISTERED-OFFICE POST TOWN (WHERE THE PAPERWORK SITS, NOT NECESSARILY THE WORK) · COMPANIES HOUSE PUBLIC RECORD, AUGUST 2026
London is the largest cluster at 23 per cent and the top five post towns hold 29 per cent, so the other 71 per cent sit across the rest of the country. A regional filter narrows the list without gutting it.
A worked example: 21100, registered office in London, incorporated in the last ninety days, from a pool of 1,275. 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 21100 companies, as leads
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Two codes, and the difference between them matters. 21100, basic pharmaceutical products, is active ingredients and raw materials, and most companies carrying it put it first.
Related SIC codes
How to read SIC 21100
SIC 21100 reads as division 21 (manufacture of basic pharmaceutical products and pharmaceutical preparations), group 211, class 2110, 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 21100 is the company's own description of what it does, and 1,090 list it first where 1,275 list it anywhere.
Who sells into division 21
Contract research and manufacturing organisations, laboratory equipment suppliers, cleanroom and validation specialists and regulatory consultants all sell into this division.
About SIC 21100
How many UK companies use SIC code 21100?
1,275 active UK companies list 21100 (Manufacture of basic pharmaceutical products) among their registered SIC codes. Each company may register up to four. Of those, 1,090 put it first. The figures come from the August 2026 Companies House register snapshot, and count active companies only.
Does an MHRA licence show up on the Companies House register?
No. Manufacturing and wholesale dealer licences are held by the MHRA and are published separately. The public record holds the company, its officers and its accounts. Use Companies House to find and qualify the entity, then check the MHRA register for what it is actually licensed to do.
Find UK SIC 21100 companies
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