Persimmon plc was created in 1972.
Sears plc was created in 1891.
Siebe plc was created in 1819.
NTR plc was created in 1991.
Hays plc was created in 1867.
Fresnillo plc was created in 2008.
Aon plc was created in 1919.
Whatman plc was created in 1740.
Alvis plc was created in 1981.
MEPC plc was created in 1946.
Rotala PLC was created in 2005.
Novar plc was created in 1985.
Halma plc was created in 1894.