| Year | Observed name |
| 1950 | Christie Sweets |
| 1951 | Christie Sweets |
| 1952 | Christie Sweets |
| 1953 | Christie Sweets |
| 1954 | Christie Sweets |
| 1955 | Christie Sweets |
| 1956 | Christie Sweets |
| 1957 | Christie Sweets |
| 1958 | Christie Sweets |
| 1959 | Christie Sweets |
| 1960 | Christie Sweets |
| 1961 | Christie Sweets |
| 1962 | Christie Sweets |
| 1963 | Christie Sweets |
| 1964 | Christie Sweets |
| 1965 | Christie Sweets |
| 1966 | Christie Sweets |
| 1967 | Christie Sweets |
| 1968 | Christie Sweets |
| 1969 | Christie Sweets |
| 1970 | Christie Sweets |
| 1971 | Christie Sweets |
| 1972 | Christie Sweets |
| 1973 | Christie Sweets |
| 1974 | (vacant) |
| 1975 | Christie Sweets |
| 1976 | (vacant) |
| 1978 | Arirang House |
| 1979 | Arirang House |
| 1981 | Arirang House |
| 1982 | Arirang House |
| 1985 | Arirang House |
| 1987 | Arirang House |
| 1989 | Bloor Christie X-ray & Ultrasound |
| 1991 | Bloor Christie X-ray & Ultrasound |
| 1992 | Bloor Christie X-ray & Ultrasound |
| 1994 | Midland Ultrasound |
| 1995 | X-Ray and Ultrasound |
| 1996 | X-Ray and Ultrasound |
| 1997 | X-Ray and Ultrasound |
| 1998 | X-Ray and Ultrasound |
| 1999 | X-Ray and Ultrasound |
| 2000 | X-Ray and Ultrasound |
| 2001 | X-Ray and Ultrasound |
| 2002 | X-Ray and Ultrasound |
| 2003 | X-Ray and Ultrasound |
| 2004 | X-Ray and Ultrasound |
| 2005 | X-Ray and Ultrasound |
| 2006 | X-Ray and Ultrasound |
| 2007 | X-Ray and Ultrasound |
| 2008 | X-Ray and Ultrasound |
| 2009 | X-Ray and Ultrasound |
| 2010 | X-Ray and Ultrasound |
| 2011 | X-Ray and Ultrasound |
| 2012 | X-Ray and Ultrasound |
| 2013 | X-Ray and Ultrasound |
| 2014 | X-Ray and Ultrasound |
| 2015 | X-Ray and Ultrasound |
| 2016 | X-Ray and Ultrasound |
| 2017 | X-Ray and Ultrasound |
| 2018 | X-Ray and Ultrasound |
| 2019 | X-Ray and Ultrasound |
| 2020 | X-Ray and Ultrasound |
| 2021 | X-Ray and Ultrasound |
| 2022 | X-Ray and Ultrasound |
| 2023 | X-Ray and Ultrasound |
| 2024 | Bloor Christie X-Ray and Ultrasound |