| Firm Name | Era | Description | 
| BARTLET & BARTLET | 1 December, 1887 | Noble A. Bartlet and Alex R. Bartlet establish the firm | 
| CLARKE, BARTLET & BARTLET | 1 July, 1892 | A. H. Clarke admitted to partnership | 
| CLARKE, COWAN, BARTLET & BARTLET | 1 January, 1896 | M.K. Cowan admitted to partnership | 
| CLARKE, BARTLET & BARTLET | 1906 | Mr. Cowan retires from the firm | 
| BARTLET & BARTLET | 1 March, 1912 | Mr. Clarke retires from the firm | 
|  | 26  December, 1912 | Death of Noble A. Bartlet | 
|  |  | Walter G. Bartlet admitted to partnership | 
| BARTLET ,BARTLET & URQUHART | 1 June, 1915 | George A. Urquhart admitted to partnership | 
| BARTLET, BARTLET, URQUHART & BARNES | 1 February, 1921 | Mr. Urquhart retires from the firm | 
|  | 26 January, 1938 | Mr. Urquhart appointed Justice of the Supreme Court of Ontario | 
| BARTLET, BARTLET, BARNES, AYLESWORTH & McGLADDERY | 16 January, 1928 | John B. Aylesworth and Harry R. McGladdery admitted to partnership | 
| BARTLET, BARNES, AYLESWORTH & McGLADDERY |  |  | 
| BARTLET, DICKSON, BRAID & RICHARDES | 1 January, 1931 | Double firm name adopted | 
| BARTLET, AYLESWORTH & McGLADDERY |  |  | 
| BARTLET,DICKSON, BRAID & RICHARDES | 22 July, 1931 | Death of Harvey L. Barnes | 
| BARTLET, AYLESWORTH & McGLADDERY | 1 January, 1934 | James L.Braid, Gordon P. Dickson and George C. Richardes admitted to partnership | 
| BARTLET, AYLESWORTH & BRAID | 21 May, 1936 | Mr. McGladdery retires from the firm | 
|  | 17 May 1946 | Death of Alex R. Bartlet | 
| BARTLET, BRAID, RICHARDES & DICKSON | 2 December, 1946 | Mr. Aylesworth appointed a Justice of the Ontario Court of Appeal | 
| BARTLET, BRAID, RICHARDES & JESSUP | 1 January, 1951 | Arthur R. Jessup admitted to partnership | 
|  | 29 May, 1953 | Death of Gordon P. Dickson | 
| BARTLET, BRAID, RICHARDES & JESSUP | 1 January, 1955 | James N. Bartlet admitted to partnership | 
|  | 25 November, 1958 | Death of Walter G. Bartlet | 
|  | 1 September, 1959 | Death of James L. Braid | 
| BARTLET, RICHARDES & JESSUP | 2 September, 1959 |  | 
| BARTLET, RICHARDES, KNIGHT & WILSON | 24 August, 1964 | Mr. Jessup appointed a Justice of the Supreme Court of Ontario (Trial Division) | 
|  | 1 October, 1964 | Frederick W. Knight admitted to partnership | 
|  | 1 January, 1966 | Frederick D. Wilson admitted to partnership | 
|  | 21 September, 1967 | Mr. Jessup appointed a Justice of the Ontario Court of Appeal | 
| BARTLET & RICHARDES | 1 January, 1971 | Milton H. Grant admitted to partnership | 
|  | 1 January, 1972 | Richard C. Gates admitted to partnership | 
|  | 17 May, 1977 | Death of George C. Richardes | 
|  | 1 April, 1980 | Colin F. Dodd admitted to partnership | 
|  | 1 April, 1983 | D. Stephen Jovanovic admitted to partnership | 
|  | 1 April, 1986 | Lawrence R. McRae admitted to partnership | 
|  | 1 April, 1988 | Daniel L. Bornais admitted to partnership | 
|  | 1 April, 1992 | Jean L. Marentette admitted to partnership | 
|  | 1 April, 1993 | Gerald E. Skillings admitted to partnership | 
|  | 1 April, 1994 | Karol F. Dycha admitted to partnership | 
|  | 25 June, 1997 | Death of Frederick D. Wilson | 
|  | 1 July, 1997 | Gerald E. Trottier admitted to partnership | 
|  | 31 December, 2000 | Gerald E. Skillings ends his practice with the firm | 
| BARTLET & RICHARDES LLP | 1 January, 2001 | Law Firm adopts Limited Liability Partnership status | 
|  | 31 January, 2002 | Frederick W. Knight retires from the practice of law | 
|  | 6 November, 2003 | Richard C. Gates, Q.C. appointed Judge to The Ontario Superior Court of Justice | 
|  | 1 January, 2005 | Elizabeth J. Musyj admitted to partnership | 
|  | 1 January, 2005 | Gregory J. Verbeem admitted to partnership | 
|  | 1 April,  2005 | Colin F. Dodd retires from the private practice of law | 
|  | 17 September, 2005 | Death of James N. Bartlet | 
|  | 31 December, 2006 | Daniel L. Bornais ends his practice with the firm | 
|  | 1  January, 2007 | Aaron P. Marcotte admitted to partnership | 
|  | 1  January, 2013 | Robert W. Weisser and Mary Joe Renaud admitted to partnership | 
|  | 30 June, 2013 | Milton H. Grant retires from the practice of law | 
|  | 6 March, 2014 | Gregory J. Verbeem appointed Judge to The Ontario Superior Court of Justice | 
|  | 1 February, 2015 | Karol F. Dycha retires from the practice of law | 
|  | 31 December, 2015 | Lawrence R. McRae retires from the practice of law | 
|  | 1 January, 2016 | Philip S. Chandler admitted to partnership | 
|  | 1 January, 2017 | Jennifer L. McKim admitted to partnership | 
|  | 31 December, 2017 | D. Stephen Jovanovic retires from the private practice of law | 
|  | 31 December, 2019 | Elizabeth J. Musyj retires from the private practice of law | 
|  | 1 January, 2022 | Crista L. Rea admitted to partnership | 
|  | 1 January, 2024 | Victoria C. Little admitted to partnership | 
|  | 1 January, 2024 | Gerald E. Trottier retires from the private practice of law |