UK companies in Winchester
Winchester is Hampshire's county city, with professional services, public sector suppliers and hospitality. 5,868 active companies have their registered office here, and 575 new ones were set up in the last twelve months.
Key facts
- 5,868 active companies are registered to a Winchester post town on the Companies House snapshot of August 2026.
- 575 new companies started here in the last twelve months, about 48 a month, and 46 in August 2026.
- The most common code is Other management consultancy activities (not financial) (SIC 70229), with 413 companies.
- The busiest postcode districts are SO23, SO21, SO22, SO50.
New companies in Winchester
575 new companies were set up with a Winchester registered office in the last twelve full months, about 48 a month. 46 of them were set up in August 2026. That sits on top of 5,868 active companies already registered here.
What the new ones do: Other management consultancy activities (not financial) leads, with 54 new companies in the year.
Selling to new Winchester companies
A company in its first months is still choosing who it works with. Reaching it then, with a short email that names what it has just started, is often the easiest time to win them as a client.
- Marketing agenciesA new company needs a website, a logo and its first customers, usually before it has picked anyone to help.
- AccountantsEvery new company owes a first set of accounts and a confirmation statement, and many have no accountant yet.
- IT and software firmsEmail, devices and security get set up in the first months, and the choices made then tend to stick.
- Insurance brokersEmployers' liability, professional indemnity and van cover are bought early, often in a hurry.
- RecruitersThe first hires come quickly once a new company wins work.
Leadistry reads the new Winchester registrations every morning, keeps the ones with a working website and a real email, and writes the first email for you to approve. The first 25 leads are free.
Get new Winchester companies as leadsThe most registered SIC codes in Winchester
Counting active companies whose registered office is a Winchester post town, these are the codes that come up most often on the August 2026 Companies House snapshot. Other management consultancy activities (not financial) leads with 413 companies. It is worth reading against the sectors below: the authored view is what Winchester is known for, this is what its companies actually filed.
- 70229Other management consultancy activities (not financial)413
- 68209Other letting and operating of own or leased real estate305
- 98000Residents property management296
- 82990Other business support service activities n.e.c.211
- 68100Buying and selling of own real estate179
- 62020IT consultancy activities158
- 41100Development of building projects154
- 99999Dormant Company151
Pick a code, then narrow by postcode and date. Every company you pull carries a working website and a real email, and we never charge for the ones we cannot complete.
Why do these counts add up to more than the total?
A company may register up to four SIC codes and these counts include every position, so a business filed under two of them appears twice.
Dominant sectors in Winchester
Postcode filter
To target Winchester on Leadistry, set the postcode prefix filter to:
SO23, SO21, SO22, SO50, SO32, SO24The search returns companies with a registered office in any of these postcode areas. Add a SIC code filter from the table above to narrow by sector.
About Winchester on Companies House
How many companies are registered in Winchester?
5,868 active companies have a registered office in Winchester, counted from the Companies House snapshot of August 2026. Dissolved companies are not counted.
How many new businesses start in Winchester each month?
575 new companies were set up in Winchester in the last twelve full months, about 48 a month. 46 were set up in August 2026.
What do new Winchester companies do?
The most common code among companies set up in Winchester in the last year is Other management consultancy activities (not financial) (SIC 70229), with 54 of them. Next come Other letting and operating of own or leased real estate and Business and domestic software development.
How do I reach new Winchester companies before anyone else?
Set a Leadistry agent to the Winchester postcode districts (SO23, SO21, SO22) and the trades you sell to. Each morning it finds the new companies that match, checks each one has a working website and a real email, and writes the first email for you to read and approve.
Nearby and related cities: Brighton and Hove · Milton Keynes · Southampton · Oxford · Hereford · Carlisle · Durham · Wrexham · Every UK city
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