James Thompson sets up a building and carpentry business in Durban.
James Thompson becomes mayor of Johannesburg - Thompson is the largest building contractor in town.
Ole Grinaker, a young engineer from Norway comes to South Africa.
James Thompson's sons, James Jr. and Mark join the business.Thompson has established branches in all the major cities in SA.
James Jr. takes over - the first major projects is Anglo American's headquarters at 44 Main Street,Johannesburg
Ole Grinaker starts his own steel reinforcing and fixing business which lead to the formation of O. Grinaker (Pty) Ltd in the Transvaal.
James Thompson Ltd becomes a public company listed on the JSE. Anglo American takes a modest shareholding.
Thompson forms a roads and earthworks company and expands the business into Africa.
Grinaker is listed on the JSE as Grinaker Holdings.
Thompson merges with Lewis Construction, Steeledale Reinforcing & Amalgamated Construction. LTA is formed and listed on the JSE.
LTA forms MITEC - Grinaker acquires Racal Electronics and the company is split into Grinaker Construction and Grinaker Electronics.
LTA acquires JC Groenewalds Elec Contractors and forms Karrena Africa. Grinaker acquires Dura Construction. AMIC acquires a 68% stake in LTA. Anglovaal acquires a controlling interest in Grinaker via AVI.
LTA acquires Fraser & Chalmers Mechanical & Piping. Grinaker divides its construction and electronics businesses, listing them separately on the JSE.
LTA acquires DSE and Aveng takes out Grinaker's majority shareholders. Grinaker is delisted from the JSE.
Anglo American sells its interest in LTA to Aveng.
Aveng Grinaker-LTA Limited is established.
Aveng Grinaker- LTA Limited sold to Laula Consortium.