It also owns companies in the concrete, transport, contracting, aggregate quarrying, and waste disposal sectors, operating predominantly in the South Island.
[8] It began investing in the transport sector in 1939,[1] and rapidly expanded under the leadership of Robertson's grandson into a $1 billion conglomerate.
It 1993, it established Allied Petroleum as a joint venture with Mobil to distribute fuel to Canterbury farmers.
[17] In July 2021, the announcement of the likely closure of the Tiwai Point Aluminium Smelter was expected to have a major impact on the business.
[18] In 2021, construction began on a nine-storey HWR Group tower in Invercargill,[19] with the company using the top four floors to house an office with 100 staff.
[21] Allied provides its franchisee outlets with self-service systems and a regular supply of fuel with limited price fluctuations.
[6] Its Pongaroa outlet, opened in 2017, is run by local residents as a joint venture between Allied Petroleum and Tararua District Council.
[23][24] A Douglas DC-3, painted in Allied Petroleum branding, was suspended next to State Highway 1 at the site of a former outlet in Mangaweka.
[6] Petrogas traces its origins to the 1960s, and took its current form in 1985 through the merger of Metro Vac and East Oil.
[1] The group includes concrete brands Allied Concrete and Ashby's Ready Mixed, lower South Island contractors SouthDrill and SouthRoads, and quarry companies Allied Materials, Fernhill Limeworks, Rangitikei Aggregates and Southern Aggregates.