Callosum Ltd
Sponsor Profile Summary
Callosum Ltd is listed in the UK sponsor register with London as its sponsor location and Skilled Worker as its listed route. The company profile is categorised as SIC 72190. Companies House lists the matched company number as 16076949. Companies House shows the company status as active. The company type is ltd. The matched company record shows an incorporation date of November 13, 2024. We first recorded this sponsor as newly added on June 9, 2026. Use this page to compare the sponsor licence record with the job advert, salary, legal employer name, and visa route before applying.
Sponsorship Details
Supported Visa Routes
- Skilled Worker
Licence Status
Licensed sponsor
Sponsor Licence Date
June 9, 2026
Last Updated
Daily GOV.UK cache
Company Details
Company Number
16076949
Company Status
active
ltd
Companies House Industry
SIC 72190
SIC code: 72190
Incorporated On
November 13, 2024
Registered Office
56 Leman Street, London, E1 8EU, England
Active Directors
ACHTERBERG, Jascha, Dr, AKARCA, Danyal, Dr
Persons With Significant Control
Callosum Technologies Ltd
Previous Company Names
SERNN LTD
Accounts
Next due August 13, 2026
Confirmation Statement
Last made up to November 11, 2025
Next due November 25, 2026
Recent Companies House Activity
change person director company with change date
November 21, 2025
confirmation statement with no updates
November 11, 2025
notification of a person with significant control
August 27, 2025
withdrawal of a person with significant control statement
August 27, 2025
certificate change of name company
August 26, 2025
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How To Use This Sponsor Profile
Confirm the legal entity
Callosum Ltd is matched with Companies House number 16076949. Compare that legal entity with the employer name on the vacancy.
Review the visa route
Callosum Ltd is listed for Skilled Worker. Make sure the vacancy matches the route you need.
Check the industry fit
The Companies House activity points to SIC 72190. Use that context when judging whether a role, salary, and occupation code make sense.
Compare the address
The registered office we found is 56 Leman Street, London, E1 8EU, England. If the job advert uses another location, confirm whether the same legal sponsor is responsible.
Common Questions About Callosum Ltd
What should applicants check before applying to Callosum Ltd?
Start by comparing the sponsor name, London location, Skilled Worker route information, and the employer name used in the job advert. A sponsor listing is useful evidence, but the vacancy still needs to match the right role, salary, and visa route.
Is Callosum Ltd relevant for Skilled Worker applicants?
Callosum Ltd is listed with Skilled Worker. If you need Skilled Worker, check that the specific vacancy also meets role eligibility, salary rules, and employer sponsorship policy.
What recent company activity is visible for Callosum Ltd?
One recent Companies House filing is change person director company with change date. The filing date shown is November 21, 2025. Use filings as background checks, not as visa advice.
When did Sponsor Licence Checker first record Callosum Ltd as newly added?
Sponsor Licence Checker first recorded Callosum Ltd as newly added on June 9, 2026. This is our site snapshot date, not an official licence grant date from GOV.UK.
How does the London location affect this sponsor check?
Callosum Ltd is listed with London as the sponsor location. Use that city as a starting point, but still check the workplace in the vacancy because employers can recruit for roles in more than one place.
What industry context is available for Callosum Ltd?
Callosum Ltd is currently shown under SIC 72190. Use the industry context to compare the employer with similar sponsors, then verify the actual job title and occupation code before applying.
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