Mining support service activities (SIC division 09)
Division 09 of the UK SIC 2007 list. It holds 2 codes, listed in full below with the number of active UK companies filed under each.
What sits in division 09
Companies here service extraction sites. They do not extract anything themselves. One code dominates in the UK: 09100, support activities for petroleum and natural gas. It covers directional drilling, well casing and cementing, derrick erection and other oilfield services. A large share of these companies are one-person vehicles. Engineers and consultants set them up to contract into North Sea operators. The rest are real service firms with their own crews and equipment.
Energy recruiters read this division as a live map of the contractor market. A new incorporation usually means an engineer has just gone independent. That person will need placements. Contractor accountants, IR35 specialists and offshore insurers chase the same moment. Growth signals matter more for the bigger service firms. As headcount rises they buy recruitment, certification and logistics support. Work here comes in project cycles. Recent accounts and confirmation statements tell you who is still active, and who is a leftover shell from an old contract.
How to read a division 09 code
A UK SIC code is five digits and division 09 is the first two of them. Everything filed under 09 shares those digits: all 2 codes below begin 09, then the third digit narrows to a group, the fourth to a class and the fifth to the subclass a company actually picks. Division 09 sits inside section B, mining and quarrying, 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 09 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 09100, support activities for petroleum and natural gas mining.
Working division 09 as a list
Division 09 holds 2 codes and 4,079 active companies between them. One code carries most of it: 09100 accounts for 76 per cent on its own, and the other 1 code accounts for the rest. Filtering by the whole division is therefore close to filtering by 09100 with a tail attached, so start from the code and widen only if the list runs dry.
More on working division 09
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.
Every SIC code in division 09
Prospecting this division
Division 09 companies, as leads
Tell us who you sell to. We find them, with a real email. 25 free leads, no card.
Division 09 questions
Which SIC code should an oil and gas contractor's limited company use?
Use 09100 if your work directly supports drilling or well operations. Most offshore contractors pick it. Engineers doing design or consultancy sometimes use an engineering code from division 71 instead. Both are fine. You declare your own code at incorporation and nobody at Companies House judges the fit. Agencies and insurers may still expect something that suits the sector.
My contract has ended. Should I change my company's SIC code or make it dormant?
You do not need to change the code between contracts. If the company stops trading altogether, you can file dormant accounts. Some owners switch the code to 99999 to show that. You update a code on your next confirmation statement, and it takes effect once filed. You can switch it back just as easily when new work starts.
Find companies across division 09
✓ No card · ✓ 25 free leads · ✓ Cancel anytime