The collection has been arranged into the following sub-fonds:
- MS 66/I Thomas Bell & Sons (of Dundee) Ltd 1812-1942
- MS 66/II Cox Brothers Ltd 1812-1989
- MS 66/III Gilroy Sons & Co Ltd 1849-1933
- MS 66/IV J & A D Grimond Ltd 1863-1953
- MS 66/V John N Kyd & Co Ltd 1850-1961
- MS 66/VI Harry Walker & Sons Ltd 1608-c.1960
- MS 66/VII F S Stewart Sandeman & Sons Ltd 1903-1936
- MS 66/VIII John Lowson Jnr & Co Ltd 1874-1955
- MS 66/IX Boase Spinning Co Ltd 1862-1987
- MS 66/X Sidlaw Industries Ltd 1887-1993
- MS 66/XI Miscellaneous associated, affiliated and subsidiary companies of Jute Industries Ltd
- MS 66/XII Miscellaneous and Unidentified Papers 1884-c.1950