The founder, Sir Hardy, 92, has retired from designing, although he keeps a seat on the company's board.
In 2009, the project's visionaries and founders were retiring to focus on writing.
Narayana and another founder are retiring on August 21.
In 1974 the three founders retired, leaving a well-established practice.
The founder retired to Plancy where he died 2 February, 1908.
The company's founder retired as board chairman that same year.
The founder of this association has since retired and the websites have been closed.
In 1997, the school's founder and principal, Betty Wheeler, retired.
The founders retired between 1996 and 2002, Paul Lister in 2006.
The ownership model is particularly well suited to medium-sized enterprises, which often struggle with business succession when their founders retire.