| Abbey Line Ltd, Cardiff |
| Name | Tonnage | Built | Start | End |
| Neath Abbey | 2570 | 1919 | 1927 | 1934 |
| Aberdeen Steamship Navigation Co.Ltd, Aberdeen |
| Name | Tonnage | Built | Start | End |
| Aberdonian | 1648 | 1909 | ||
| Harlaw | 1141 | 1911 | ||
| Koolga | 1110 | 1910 | ||
| Lochnagar | 1619 | 1906 |
| The Adelaide Steamship Co.Ltd, London, Adelaide |
| Name | Tonnage | Built | Start | End |
| Aldinga | 3078 | 1920 | ||
| Allara | 3279 | 1924 | ||
| Arkaba | 4212 | 1924 | ||
| Aroona | 3116 | 1918 | ||
| Barossa | 4239 | 1938 | ||
| Beltana | 3043 | 1937 | ||
| Bundaleer | 4238 | 1939 | ||
| Bungaree | 3043 | 1937 | ||
| Dilga | 3308 | 1920 | ||
| Dundula | 3344 | 1920 | ||
| Manoora | 10756 | 1935 | ||
| Manunda | 9115 | 1929 | ||
| Minnipa | 1977 | 1927 | ||
| Momba | 3021 | 1926 | ||
| Moonta | 2693 | 1931 | ||
| Mulcra | 1168 | 1925 | ||
| Mundalia | 3018 | 1926 | ||
| Noora | 1072 | 1924 | ||
| Oorama | 1051 | 1921 | ||
| Ulooloo | 3236 | 1924 |
| Allan, Black & Co., Sunderland |
| Name | Tonnage | Built | Start | End |
| Thistlebrae | 4747 | 1928 | ||
| Thistleford | 4764 | 1928 | ||
| Thistlegarth | 4747 | 1929 | ||
| Thistleglen | 4748 | 1929 |
| Ambrose, Davies & Matthews, Ltd, London |
| Name | Tonnage | Built | Start | End |
| Aelybryn | 4986 | 1938 | ||
| Brynymor | 4771 | 1936 | ||
| Cefn-y-Bryn | 5100 | 1939 |
| Anchor Line,Ltd, Glasgow |
| Name | Tonnage | Built | Start | End |
| Britannia | 8799 | 1926 | ||
| Caledonia | 17046 | 1925 | ||
| California | 16792 | 1923 | ||
| Cameronia | 16297 | 1920 | ||
| Castalia | 6601 | 1906 | ||
| Cilicia | 11136 | 1938 | ||
| Circassia | 11136 | 1937 | ||
| Elysia | 6757 | 1908 | ||
| Transylvania | 16923 | 1925 |
| Angel Son & Co., Ltd, Cardiff |
| Name | Tonnage | Built | Start | End |
| Bramhill | 1834 | 1923 | ||
| Bramwell | 1927 | 1921 | ||
| Hillfern | 1535 | 1920 | ||
| Yorkbrook | 1236 | 1905 |
| Anglo-Mexican Petroleum Co., London |
| Name | Tonnage | Built | Start | End | |
| War Anglian | 5378 | 1918 | 1918 | 1920 | managed for SC |
| Anglo-Saxon Petroleum Co., London |
| Name | Tonnage | Built | Start | End | |
| Acavus | 8010 | 1935 | |||
| Adula | 8040 | 1937 | |||
| Alexia | 8016 | 1935 | |||
| Amastra | 8031 | 1935 | |||
| Anadara | 8009 | 1935 | |||
| Ancylus | 8017 | 1935 | |||
| Arinia | 8024 | 1936 | |||
| Auris | 8030 | 1935 | |||
| Bullmouth | 7519 | 1927 | |||
| Bulysses | 7519 | 1927 | |||
| Caprella | 8230 | 1931 | |||
| Capsa | 8229 | 1931 | |||
| Cardita | 8237 | 1931 | |||
| Cardium | 8236 | 1931 | |||
| Carelia | 8033 | 1938 | |||
| Cerion | 2588 | 1938 | |||
| Chama | 8028 | 1938 | |||
| Circe Shell | 8207 | 1931 | |||
| Clam | 7404 | 1927 | |||
| Clausina | 8083 | 1938 | |||
| Clea | 7987 | 1938 | |||
| Cliona | 8375 | 1931 | |||
| Conch | 8876 | 1931 | |||
| Conus | 8132 | 1931 | |||
| Corbis | 8132 | 1931 | |||
| Cowrie | 8197 | 1931 | |||
| Crista | 2590 | 1938 | |||
| Cymbula | 8033 | 1938 | |||
| Daphnella | 8078 | 1938 | |||
| Darina | 8000 | 1939 | |||
| Daronia | |||||
| War African 1921:Absia | 5218 | 1918 | 1919 | 1927 | |
| War Angler | 5210 | 1918 | 1918 | 1919 | managed for Tanker SC |
| War Begum 1921:Conus | 5578 | 1919 | 1920 | 1927 |
AVON SS Co Ltd, Bristol
| River Avon | 5277 | 1918 | 1936 | 1936 |
BANK LINE Ltd (A Weir & Co), London
| Luceric | 6672 | 1919 | 1919 | 1938 |
THE BARR SHIPPING Co. Ltd, Glasgow
| Barrgrove | 5214 | 1918 | 1927 | 1941 |
BICKETT & Co.,
| War Beetle | 5176 | 1918 | 1918 | 1919 | MAnaged for SC |
BLUE STAR LINE, London
| Fresno Star | 7946 | 1919 | 1929 | 1933 |
CT BOWRING, London
| War Afridi | 5561 | 1920 | 1921 | managed for SC | |
| War Bahadur | 5565 | 1918 | 1918 | 1936 | managed for SC, from 1921 for the Admiralty |
BRITISH & AFRICAN SN Co. (Elder Dempster & Co), Liverpool, 1920:ELDER LINE Ltd
| Bathurst | 5253 | 1919 | 1919 | 1933 |
BRITISH INDIA S.N. Co., Glasgow
| Binfield | 5180 | 1919 | 1919 | 1951 |
| Garada | 5333 | 1919 | 1919 | 1936 |
| Haresfield | 5299 | 1919 | 1919 | 1942 |
| Nerbudda | 7911 | 1919 | 1919 | 1936 |
| Woodarra | 7946 | 1919 | 1919 | 1929 |
BRITISH & SOUTH AMERICA SN Co. Ltd. (R P Houston), Liverpool
| Halocrates | 5257 | 1919 | 1920 | 1923 |
BRITISH TANKER Co.
| War Begum | 5578 | 1919 | 1919 | 1920 | Managed for SC |
| War Bharata | 5600 | 1920 | 1920 | 1921 | Managed for SC |
CADOGAN SS Co Ltd, Glasgow
| Queen Olga | 5283 | 1919 | 1924 | 1937 |
CANADIAN PACIFIC RAILWAY Co., London
| War Beryl 1920:Bothwell | 6723 | 1919 | 1919 | 1933 | Till 1920 managed for SC |
CARE & MARQUAND SHIPPING Co. Ltd, Newcastle
| Coniscliffe | 5378 | 1918 | 1927 | 1932 |
CLAN LINE STEAMERS (Cayzer, Irvine & Co), Glasgow
| Clan Skene | 5257 | 1919 | 1919 1923 | 1920 1942 |
| Clan Colquhoun | 7912 | 1918 | 1933 | 1947 |
J. COOK & SONS, London
| War Atlin] | 2338 | 1918 | 1918 | 1920 | Managed for SC |
CRETE SHPPING Co Ltd, Newcastle
| Amberstone | 2080 | 1917 | 1924 | 1927 |
CUNARD SS Co. Ltd, London
| War Baron | 6240 | 1917 | 1917 | 1918 | Managed for SC |
DALGLIESH STAM SHIPPING Co., Newcastle
| Roseworth | 2554 | 1919 | 1929 | 1934 |
DAYTON SS Co, Newcastle
| Dayton | 5378 | 1918 | 1923 | 1927 |
DONALD & TAYLOR
| War Arrow | 2358 | 1918 | 1918 | 1919 | Managed for SC |
DUNDEE, PERTH & LONDON SHIPPING Co., Dundee
| Scotia | 1141 | 1862 | 1862 | 1862 |
EASTON, GREIG & Co
| War Bahine | 2342 | 1918 | 1919 | Managed for SC |
ELLERMAN LINES Ltd., Liverpool
| Mardinian | 2429 | 1919 | 1919 | 1937 |
ELLERMAN & PAPAYANNI LINES Ltd.,
| Mardinian | 2429 | 1919 | 1937 | 1940 |
FRATRES Ltd (Brown, Jenkinson & Co), London
| Southern | 5105 | 1919 | 1919 | 1922 |
FINCHLEY SS Co, London
| Oakfield | 5218 | 1918 | 1937 1951 | 1940 1955 |
J. FISHER & SONS Ltd, Barrow
| Sound Fisher | 501 | 1919 | 1929 | 1939 |
FREDERICK LEYLAND & Co
| Fresno City | 7946 | 1919 | 1935 | 1947 |
FURNESS, WITHY & Co, London
| War Admiral | 5875 | 1917 | 1917 | 1919 | managed for SC |
GENERAL SN Co, London
| Mavis | 501 | 1919 | 1921 | 1929 |
GIBBS & Co, London
| War Beach | 3112 | 1918 | 1918 | 1919 | Managed for SC |
J. GLYNN & Son, London
| War Ballon | 2341 | 1918 | 1918 | 1918 | Managed for SC |
| War Barrage | 2301 | 1918 | 1918 | 1919 | Managed for SC |
HAIG SHIPPING Co. (J S Evans), London
| Canterbury Bell | 703 | 1919 | 1919 | 1922 |
HAIN SS Co. St Ives
| Trefusis | 5329 | 1918 | 1919 | 1943 |
| Trevereyn | 5281 | 1920 | 1920 | 1941 |
A.HOLT & Co,
| War Amazon | 3165 | 1918 | 1918 | 1919 | Managed for SC |
HUNTING & SON
| Oakfield | 5218 | 1918 | 1940 | 1946 | managed for MOWT |
JOHN HARRISON Ltd, London
| Mickleham | 366 | 1920 | 1920 | 1920 |
JUBILEE S.N. Co., Newcastle
| David Dawson | 5277 | 1918 | 1935 | 1936 |
KAYE & SON Co.
| Western City 1942:Empire Turnstone | 5828 | 1918 | 1941 | 1942 | Managed for MOWT |
KELSTON SS Co, Bristol
| Severn Leigh | 5283 | 1919 | 1937 | 1940 |
KING LINE Ltd., London
| King Alfred | 5275 | 1919 | 1919 | 1940 |
LEEDS SHIPPING Co (Reardon Smith & Co)
| Barrgrove | 5214 | 1918 | 1946 | 1947 |
MacANDREWS & Co., London
| War Bagpipe | 2314 | 1918 | 1918 | 1920 | Managed for SC |
McILWRAITH, McEACHARN, Melbourne
| Koolonga | 5277 | 1918 | 1921 | 1929 |
J. MATHIAS AND SONS, Aberystwyth
| Southern | 5105 | 1919 | 1919 | 1919 |
OCEANIC STEAM NAVIGATION Co, Liverpool (White Star Line)
| War Argus 1919:Gallic | 7912 | 1918 | 1933 | till 1919 managed for SC |
OAK SHIPPING Co., London
| Oakfield | 5218 | 1918 | 1946 | 1951 |
PHILIPS, PHILIPS & Co., London
| War Anemone | 5214 | 1918 | 1918 | 1919 | managed for SC |
| War Arabis | 5188 | 1918 | 1918 | 1918 | managed for SC |
J.M. PIGGINS, Montrose
| Belford | 366 | 1920 | 1936 | 1948 |
REARDON SMITH LINE, Glasgow
| Barrgrove | 5214 | 1918 | 1941 | 1946 |
REDDINGTON SHIPPING Co. (Chas. H. Pile) , London
| Canterbury Bell | 703 | 1919 | 1919 | 1919 |
REINDEER SS Co. Ltd., London
| Reindeer | 3112 | 1918 | 1919 | 1924 |
W. RUNCIMAN & Co, London
| War Aconite | 5329 | 1918 | 1918 | 1919 | managed for SC |
ROBERT STANLEY SHIPPING Co (RS Dalgliesh), Newcastle
| Roseworth | 2554 | 1919 | 1929 |
ROYAL MAIL STEAM PACKET Co, London
| War Armour | 8192 | 1917 | 1917 | 1919 | managed for SC |
SHIRE LINE Ltd, London
| Glamorganshire | 8192 | 1917 | 1919 | 1933 |
SOUTH METROPOLITAN GAS Co, London
| Catford | 1565 | 1919 | 1919 | 1943 |
SOUTH WALES SAND & GRAVEL Co, Swansea
| Glen Foam | 366 | 1920 | 1948 | 1963 |
STRICK LINE Ltd, Swansea
| Shahristan | 3127 | 1919 | 1919 | 1920 |
SUN SHIPPING Co. Ltd.,London
| Sunwood | 3112 | 1918 | 1924 | 1927 |
SUTHERLAND SS Co., Newcastle
| Sutherland | 5277 | 1918 | 1918 | 1920 |
B.J. SUTHERLAND Co, Newcastle
| Caithness | 5277 | 1918 | 1929 | 1935 |
TAY SAND Co, Swansea
| Glen Foam | 366 | 1920 | 1963 | 1963 |
TEMPERLEY SS Co, London (J Temperley & Co)
| War Anchusa 1919:Bembridge | 5283 | 1919 | 1919 | 1924 | till 1919 managed for SC |
TOWER SS Co (Counties Ship Management), London
| Tower Crown | 6723 | 1919 | 1934 | 1937 |
TRAMP SHIPPING Ltd
| Bothwell | 6723 | 1919 | 1933 | 1934 |
TRANS OCEANIC SS Co, Glasgow
| Binfield | 5180 | 1919 | 1951 | 1951 |
TYNE-TEES SHIPPING Co, Sunderland
| Belford | 366 | 1920 | 1928 | 1936 |
TYZACK & BRANFOOT,Picton NS
| War Algoma | 2212 | 1919 | 1919 | 1920 | managed for SC |
| War Bee | 1730 | 1918 | 1918 | 1920 | managed for SC |
UNION COLD STORAGE Co
| Fresno Star | 7946 | 1919 | 1933 | 1935 |
UNION SS Co. OF NEW ZEALAND Ltd, London
| Waihemo | 5627 | 1919 | 1919 | 1934 |
| Kawatiri | 3127 | 1919 | 1920 | 1936 |
VERANO SS Co, London
| Wolf Rock | 5600 | 1920 | 1948 | 1953 |
WALFORD LINES Ltd, London
| Jolly Laura | 366 | 1920 | 1920 | 1928 |
A. WEIR Co, London
| War African | 5218 | 1918 | 1918 | 1919 |
WESTERN COUNTIES SHIPPING Co., London
| Southmead | 5277 | 1918 | 1920 | 1921 |
WEST HARTLEPOOL SN Co. Ltd, West Hartlepool
| Hendonhall | 5587 | 1920 | 1927 | 1932 |
WHEELOCK & Co, Singapore
| War Begum | 5578 | 1919 | 1937 | 1938 |
WHITFIELD, KENDRICK & Co, London
| War Apricot | 2501 | 1918 | 1918 | 1919 | managed for SC |