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Tetra Tech Group Limited group

PSC-derived corporate control hierarchy for active UK corporate PSC filings.

Company profile
Children
25
Direct
4
Levels
3

Hierarchy

Updated 06 Jun 2026 16:52

PSC corporate control
  1. Root Active LTD 25 children

    Tetra Tech Group Limited

    CRN 06595608
    Profile
    1. Level 1 Active LTD 10 children

      Tetra Tech Limited

      CRN 01959704
      Explore branch Profile
      1. Level 2 Active LTD 1 child

        Tetra Tech Consulting (Ni) Limited

        CRN NI667243
        Explore branch Profile
        1. Level 3 Active LTD

          WYG Engineering (Northern Ireland) Limited

          CRN NI020346
          Profile
      2. Level 2

        02579388

        CRN 02579388
      3. Level 2

        03076421

        CRN 03076421
      4. Level 2

        03837186

        CRN 03837186
      5. Level 2 Active PRIVATE LIMITED COMPANY

        Arcadis Tetra Tech 1 Limited

        CRN 17162691
        Profile
      6. Level 2 Active PRIVATE LIMITED COMPANY

        Arcadis Tetra Tech 2 Limited

        CRN 17169076
        Profile
      7. Level 2 Active LTD

        Nuclear Decommissioning Limited

        CRN 11952605
        Profile
      8. Level 2 Active LTD

        Trench Farrow Limited

        CRN 01433914
        Profile
      9. Level 2 Active LTD

        White Young Green Limited

        CRN 05111508
        Profile
    2. Level 1 Active LTD 7 children

      Tetra Tech Environment Planning Transport Limited

      CRN 03050297
      Explore branch Profile
      1. Level 2 Active LTD 1 child

        Signet Planning Limited

        CRN 05214986
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        1. Level 3 Active LTD

          Tetra Tech Planning Limited

          CRN 05241035
          Profile
      2. Level 2

        06694185

        CRN 06694185
      3. Level 2 Active LTD

        Alliance Environment and Planning Limited

        CRN 03598361
        Profile
      4. Level 2 Active LTD

        FMW Consultancy Ltd

        CRN 05760849
        Profile
      5. Level 2 Active LTD

        Neil Allen Associates Limited

        CRN 06165280
        Profile
      6. Level 2 Active LTD

        Tetra Tech Environmental and Planning (northern Ireland) Limited

        CRN NI050736
        Profile
    3. Level 1 Active LTD 3 children

      Tetra Tech Management Services Limited

      CRN 04807864
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      1. Level 2 Active LTD 1 child

        North Associates (Cumbria) Limited

        CRN 07493435
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        1. Level 3 Active LTD

          Taylor & Hardy Limited

          CRN 03977505
          Profile
      2. Level 2 Active LTD

        Tetra Tech Management Services (northern Ireland) Limited

        CRN NI021970
        Profile
    4. Level 1 1 child

      03195485

      CRN 03195485
      Explore branch
      1. Level 2

        04046958

        CRN 04046958