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Tetra Tech UK Holdings Limited group

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

Company profile
Children
118
Direct
4
Levels
5

Hierarchy

Updated 06 Jun 2026 16:52

PSC corporate control
  1. Root Active LTD 118 children

    Tetra Tech UK Holdings Limited

    CRN 05909611
    Profile
    1. Level 1 Active PLC 69 children

      R P S Group PLC

      CRN 02087786
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      1. Level 2 Active LTD 12 children

        Rps Energy Limited

        CRN 01465554
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        1. Level 3 Active LTD 1 child

          Cambrian Consultants Limited

          CRN 02013777
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          1. Level 4 Active LTD

            Cambrian Consultants America Limited

            CRN 03385524
            Profile
        2. Level 3 Active LTD 1 child

          Nautilus Limited

          CRN 03635033
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          1. Level 4 Active LTD

            Nautilus (Seaa) Limited

            CRN 06208362
            Profile
        3. Level 3 Active LTD 1 child

          Paras Limited

          CRN 02854688
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          1. Level 4 Active LTD

            Paras Consulting Limited

            CRN 03437620
            Profile
        4. Level 3 Active LTD 1 child

          Rudall Blanchard Associates Group Limited

          CRN 04155029
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          1. Level 4 Active LTD

            Rudall Blanchard Associates Limited

            CRN 02724606
            Profile
        5. Level 3 Active LTD

          Oceanfix International Limited

          CRN SC074452
          Profile
        6. Level 3 Active LTD

          Oil Experience Limited

          CRN 05241791
          Profile
        7. Level 3 Active LTD

          Reservoir Imaging Limited

          CRN SC290824
          Profile
        8. Level 3 Active LTD

          Rps Energy Global Limited

          CRN 03014707
          Profile
      2. Level 2 Active LTD 11 children

        Rps Consulting Services Limited

        CRN 01470149
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        1. Level 3 Active LTD 1 child

          Rps Consultants Limited

          CRN 02182945
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          1. Level 4 Active LTD

            Rps Mountainheath Limited

            CRN 02772276
            Profile
        2. Level 3 Active LTD 1 child

          Rps Heritage Holdings Limited

          CRN 04340862
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          1. Level 4 Active LTD

            Rps Heritage Limited

            CRN 03303376
            Profile
        3. Level 3 Active LTD

          DBK Partners Limited

          CRN 09112712
          Profile
        4. Level 3 Active LTD

          Netadmin Limited

          CRN 03335175
          Profile
        5. Level 3 Active PLC

          Nigel Moor & Associates Public Limited Company

          CRN 01253835
          Profile
        6. Level 3 Active LTD

          Rps Chapman Warren Limited

          CRN 03014565
          Profile
        7. Level 3 Active LTD

          Rps Health In Business Limited

          CRN SC216515
          Profile
        8. Level 3 Active LTD

          Rps Ireland Limited

          CRN NI020604
          Profile
        9. Level 3 Active LTD

          Rps Occupational Health Limited

          CRN 03829586
          Profile
      3. Level 2 Active LTD 8 children

        Ecl Group Limited

        CRN 03108396
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        1. Level 3 Active LTD 2 children

          Ecl Technology Limited

          CRN 02394648
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          1. Level 4 Active LTD 1 child

            Scott Pickford Limited

            CRN 02153257
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            1. Level 5 Active LTD

              Quad Engineering Limited

              CRN 02685357
              Profile
        2. Level 3 Active LTD 1 child

          Ecl Resources Management, Limited

          CRN 02335589
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          1. Level 4 Active LTD

            X-Ipec Limited

            CRN 01728570
            Profile
        3. Level 3 Active LTD 1 child

          Exploration Consultants Limited

          CRN 02453804
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          1. Level 4 Active LTD

            Geophysical Safety Resources Limited

            CRN 03205859
            Profile
        4. Level 3 Active LTD

          Energy Innovations Limited

          CRN 02018831
          Profile
      4. Level 2 Active LTD 3 children

        Basicshare Limited

        CRN 04742483
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        1. Level 3 Active LTD 2 children

          Martindale Holdings Limited

          CRN 02393200
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          1. Level 4 Active LTD

            Burks Green & Partners Limited

            CRN 02392644
            Profile
          2. Level 4 Active LTD

            Sherwood House Properties Limited

            CRN 02894749
            Profile
      5. Level 2 Active LTD 1 child

        Geocon Group Services Limited

        CRN 01799617
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        1. Level 3 Active LTD

          Geophysical Consultants Limited

          CRN 01624192
          Profile
      6. Level 2 Active LTD 1 child

        Hydrosearch Associates Limited

        CRN 02867042
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        1. Level 3 Active LTD

          Rps Timetrax Limited

          CRN 02971028
          Profile
      7. Level 2 Active LTD 1 child

        Rps Environmental Management Limited

        CRN 01756175
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        1. Level 3 Active LTD

          Clear Environmental Consultants Limited

          CRN 04631130
          Profile
      8. Level 2 Active LTD 1 child

        Rps Finance Aap Limited

        CRN 03191504
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        1. Level 3 Active LTD

          Rps Utilities Limited

          CRN 03403280
          Profile
      9. Level 2 Active LTD 1 child

        Safety and Reliability Consultants Limited

        CRN 01826494
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        1. Level 3 Active LTD

          SRC (Consultants) Limited

          CRN 01247404
          Profile
      10. Level 2 Active LTD 1 child

        Troy-Ikoda Limited

        CRN 03590805
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        1. Level 3 Active LTD

          Troy-Ikoda Management Limited

          CRN 02936835
          Profile
      11. Level 2 Active LTD

        Emulous Group Limited

        CRN 03933269
        Profile
      12. Level 2 Active LTD

        Emulous Limited

        CRN 04154073
        Profile
      13. Level 2 Active LTD

        Flow Control (Water Conservation) Limited

        CRN 01885610
        Profile
      14. Level 2 Active LTD

        Isochrone Holdings Limited

        CRN 02927617
        Profile
      15. Level 2 Active LTD

        Probabilistic Risk Assessments Limited

        CRN 01809129
        Profile
      16. Level 2 Active LTD

        R W Gregory Limited

        CRN 02521213
        Profile
      17. Level 2 Active LTD

        Rps Business Healthcare Limited

        CRN 03073599
        Profile
      18. Level 2 Active LTD

        Rps Design Limited

        CRN 01579945
        Profile
      19. Level 2 Active LTD

        Rps Ecoscope LTD.

        CRN 03596447
        Profile
      20. Level 2 Active LTD

        Rps Energy Consultants Limited

        CRN 03287074
        Profile
      21. Level 2 Active LTD

        Rps Energy Services Limited

        CRN 02767480
        Profile
      22. Level 2 Active LTD

        Rps Group Us Holdings Limited

        CRN 03030071
        Profile
      23. Level 2 Active LTD

        Rps Laboratories Limited

        CRN 02368537
        Profile
      24. Level 2 Active LTD

        Rps Planning & Development Limited

        CRN 02947164
        Profile
      25. Level 2 Active LTD

        Rps Trustees Limited

        CRN 02880571
        Profile
      26. Level 2 Active LTD

        Town Planning Consultancy Limited

        CRN 02258618
        Profile
      27. Level 2 Active LTD

        TPK Consulting Limited

        CRN 02314983
        Profile
      28. Level 2 Active LTD

        Utility Technical Services Limited

        CRN 02963703
        Profile
      29. Level 2 Active LTD

        WTW & Associates Limited

        CRN 04350462
        Profile
    2. Level 1 Active LTD 31 children

      Tetra Tech UK Consulting Group Limited

      CRN 01869543
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      1. Level 2 Active LTD 25 children

        Tetra Tech Group Limited

        CRN 06595608
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        1. Level 3 Active LTD 10 children

          Tetra Tech Limited

          CRN 01959704
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          1. Level 4 Active LTD 1 child

            Tetra Tech Consulting (Ni) Limited

            CRN NI667243
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            1. Level 5 Active LTD

              WYG Engineering (Northern Ireland) Limited

              CRN NI020346
              Profile
          2. Level 4

            02579388

            CRN 02579388
          3. Level 4

            03076421

            CRN 03076421
          4. Level 4

            03837186

            CRN 03837186
          5. Level 4 Active PRIVATE LIMITED COMPANY

            Arcadis Tetra Tech 1 Limited

            CRN 17162691
            Profile
          6. Level 4 Active PRIVATE LIMITED COMPANY

            Arcadis Tetra Tech 2 Limited

            CRN 17169076
            Profile
          7. Level 4 Active LTD

            Nuclear Decommissioning Limited

            CRN 11952605
            Profile
          8. Level 4 Active LTD

            Trench Farrow Limited

            CRN 01433914
            Profile
          9. Level 4 Active LTD

            White Young Green Limited

            CRN 05111508
            Profile
        2. Level 3 Active LTD 7 children

          Tetra Tech Environment Planning Transport Limited

          CRN 03050297
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          1. Level 4 Active LTD 1 child

            Signet Planning Limited

            CRN 05214986
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            1. Level 5 Active LTD

              Tetra Tech Planning Limited

              CRN 05241035
              Profile
          2. Level 4

            06694185

            CRN 06694185
          3. Level 4 Active LTD

            Alliance Environment and Planning Limited

            CRN 03598361
            Profile
          4. Level 4 Active LTD

            FMW Consultancy Ltd

            CRN 05760849
            Profile
          5. Level 4 Active LTD

            Neil Allen Associates Limited

            CRN 06165280
            Profile
          6. Level 4 Active LTD

            Tetra Tech Environmental and Planning (northern Ireland) Limited

            CRN NI050736
            Profile
        3. Level 3 Active LTD 3 children

          Tetra Tech Management Services Limited

          CRN 04807864
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          1. Level 4 Active LTD 1 child

            North Associates (Cumbria) Limited

            CRN 07493435
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            1. Level 5 Active LTD

              Taylor & Hardy Limited

              CRN 03977505
              Profile
          2. Level 4 Active LTD

            Tetra Tech Management Services (northern Ireland) Limited

            CRN NI021970
            Profile
        4. Level 3 1 child

          03195485

          CRN 03195485
          Explore branch
          1. Level 4

            04046958

            CRN 04046958
      2. Level 2

        01871269

        CRN 01871269
      3. Level 2

        04387285

        CRN 04387285
      4. Level 2 Active PRIVATE-LIMITED-GUARANT-NSC

        Waste Management Research Limited

        CRN 03239828
        Profile
      5. Level 2 Active LTD

        White Young Green International Limited

        CRN 03734619
        Profile
      6. Level 2 Active LTD

        WYG Consulting Limited

        CRN 10470582
        Profile
    3. Level 1 Active LTD 14 children

      Tetra Tech UK Limited

      CRN 12241404
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      1. Level 2 Active LLP 8 children

        Hoare Lea LLP

        CRN OC407254
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        1. Level 3 Active LTD 7 children

          Hoare Lea Holdings Limited

          CRN 07088478
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          1. Level 4

            06596951

            CRN 06596951
          2. Level 4 Active LTD

            Hoare Lea and Partners Limited

            CRN 01854244
            Profile
          3. Level 4 Active LTD

            Hoare Lea Asia Limited

            CRN 06596966
            Profile
          4. Level 4 Active LTD

            Hoare Lea Europe Limited

            CRN 06563480
            Profile
          5. Level 4 Active LTD

            Hoare Lea Middle East and Africa Limited

            CRN 06747866
            Profile
          6. Level 4 Active LTD

            Hoare Lea North America Limited

            CRN 07146929
            Profile
          7. Level 4 Active LTD

            Hoare Lea UK Limited

            CRN 07092778
            Profile
      2. Level 2 Active LTD 1 child

        Tetra Tech International Development Europe Limited

        CRN 04120956
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        1. Level 3 Active LTD

          Tetra Tech International Development Limited

          CRN 03799145
          Profile
      3. Level 2 Active LTD

        Coffey Geotechnics Limited

        CRN 06328315
        Profile
      4. Level 2 Active LTD

        Ndy Consulting Limited

        CRN 03890617
        Profile
      5. Level 2 Active LTD

        Piteau Associates UK Limited

        CRN 10436917
        Profile
    4. Level 1 Active LTD

      WYG Advisory Limited

      CRN 10705397
      Profile