logo
explain how to read the page

The above diagram shows the color scheme of the layout in the main result page. The parent entities and officers are those entities, including individual and legal persons, have significant controls over the company in focus. The offspring entities and appointments are those entities that the company in focus can influence on.

Clicking the links on parent entities or officers, and offspring entities or managed companies will put them in focus and show upstream or downstream connections. In general, ascendant entities can be found by moving toward upstream, and descendant entities are by toward downstream. In this way, progenitor entities such as grandparent companies (parents of parent), sibling companies (children of parent), partner companies (parents of child), and progeny entities such as grandchild companies (children of child) can be found easily.

Parent entities and officers 3
  • 1
    Achterberg, Jascha, Dr
    Born in July 1996
    Individual (2 offsprings)
    Officer
    2024-11-13 ~ now
    OF - Director → CIF 0
  • 2
    Akarca, Danyal, Dr
    Born in March 1995
    Individual (4 offsprings)
    Officer
    2024-11-13 ~ now
    OF - Director → CIF 0
  • 3
    CALLOSUM TECHNOLOGIES LTD
    16646869
    56, Leman Street, London, England
    Active Corporate (2 parents, 1 offspring)
    Person with significant control
    2025-08-26 ~ now
    PE - Ownership of voting rights - 75% or moreCIF 0
    PE - Ownership of shares – 75% or moreCIF 0
    PE - Right to appoint or remove directorsCIF 0
parent relation
Company in focus

SERNN LTD

Company number: 16076949
Registered names
SERNN LTD - now
SERNN LTD - 2025-08-26
Standard Industrial Classification
72190 - Other Research And Experimental Development On Natural Sciences And Engineering

  • SERNN LTD
    Info
    SERNN LTD - 2025-08-26
    Registered number 16076949
    56 Leman Street, London E1 8EU
    PRIVATE LIMITED COMPANY incorporated on 2024-11-13 (1 year 4 months). The company status is Active.
    CIF 0
child relation
Offspring entities and appointments 0
  • Not found in our database.

The content of this website is protected by AgonGuard.

© 2022- Polylogarithmic Technology Ltd (Registered in England and Wales No. 14256313). All rights reserved.

Contains public sector information retrieved at 9 February 2026 and licensed under the Open Government Licence v3.0.