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Warning: This is not intended to be an exhaustive history of the companies listed, but an indication of the changes of ownership and the links between companies and directors in those companies. Only collieries, pits etc. in the North of England are shown - the companies may own other properties etc. outside this area and there may have been other changes of ownership etc. for which we currently do not have details.
Entries added or updated since 01 Jun 2008 are highlighted thus: 
| Company | Company Details | |
|---|---|---|
| R. & A. Young Mining Ltd. | ||
| R. J. Bewick & Brothers | 1933 | |
| R. Summerson & Co. | ||
| R. Summerson & Co. Ltd. | ||
| Radcliffe Coal Co. Ltd. | ||
| Rainton Colliery Co. Ltd. | 1923, 1933, 1940, 1947 | |
| Ramshaw Coal Co. Ltd. | 1933, 1940, 1947 | |
| Randolph Coal Co. Ltd. | 1933, 1940, 1947 | |
| Redheaugh Colliery Ltd. (Owners of) | 1923 | |
| Riddle & Sons (Collieries) Ltd. | 1940 | |
| Risehow Colliery, Coking & By-Product Co. | ||
|
Risehow Colliery, Coking & By-Product Co. Ltd. | 1923, 1933, 1940, 1947 |
| Ritson, U. A. & Sons Ltd. | 1923, 1933 | |
| Ritsons (Burnhope) Collieries Ltd. | ||
| Robert Simpson | 1880, 1882, 1884, 1888, 1890 | |
| Robinson, Joseph & Co. Ltd. | ||
| Robson, Thomas & Sons | 1933 | |
| Roddymoor Colliery Ltd. | ||
| Rumby Hill Colliery Co. Ltd. | ||
|
Ryhope Coal Co. Ltd. | 1923, 1933, 1940, 1947 |
