Administration of financial markets (SIC code 66110)
Administration of financial markets is UK SIC code 66110. It sits in division 66 (Activities auxiliary to financial services and insurance activities) of the SIC 2007 list. On the August 2026 Companies House register, 1,643 active UK companies list 66110 among their SIC codes. 1,110 of them list it first.
1,643active UK companies list SIC 66110 among their codes on the public recordCompanies House · counts as of August 2026
SIC 66110 in numbers
1,643 companies is 0.03 per cent of the 5,190,464 active companies on the UK register. 66110 is the 6th most used of the 7 codes we track in division 66.
1,110 put 66110 first and 533, 32 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
The five busiest post towns hold 43 per cent of them and London alone 37 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: 66110, registered office in London, incorporated in the last ninety days, from a pool of 1,643. 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 66110 companies, as leads
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This division gathers the middlemen of financial services. Insurance agents and brokers sit under 66220.
Related SIC codes
How to read SIC 66110
SIC 66110 reads as division 66 (activities auxiliary to financial services and insurance activities), group 661, class 6611, then the full five digits, inside section K, financial and insurance activities. A company picks its own codes, up to four, and Companies House does not check them, so 66110 is the company's own description of what it does, and 1,110 list it first where 1,643 list it anywhere.
Who sells into division 66
Plenty of suppliers work this water. They sell compliance support, professional indemnity cover, CRM and back-office platforms, paraplanning services and recruitment.
About SIC 66110
How many UK companies use SIC code 66110?
1,643 active UK companies list 66110 (Administration of financial markets) among their registered SIC codes. Each company may register up to four. Of those, 1,110 put it first. The figures come from the August 2026 Companies House register snapshot, and count active companies only.
Which SIC code do independent financial advisers normally use?
Most IFAs register 66190, activities auxiliary to financial intermediation n.e.c. Insurance-focused advisers often use 66220 or 66290 instead. There is no official mapping and no approval step. Directors choose their own codes at incorporation and can amend them on the next confirmation statement (CS01). A company may hold up to 4 codes, so many adviser firms list a financial code and an insurance code.
Find UK SIC 66110 companies
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