The story
Founded by Johann Thormählen and Wilhelm Jantzen in 1874.1
Private company
German firm
Jantzen & Thormählen was a German firm based in Hamburg that was established to exploit the resources of Cameroon. The firm's commercial and political influence was a major factor in the establishment of the colony of Kamerun in 1884.2 It was founded by Johann Thormählen and Wilhelm Jantzen.1 It ceased to exist in 1907.1 Wikipedia text CC BY-SA 4.0
Last updated Oct 21, 2026.
See how the biggest companies compare on our leaderboards

Jantzen & Thormählen was a German firm based in Hamburg that was established to exploit the resources of Cameroon. The firm's commercial and political influence was a major factor in the establishment of the colony of Kamerun in 1884.2
Founded by Johann Thormählen and Wilhelm Jantzen in 1874.1
Who has led Jantzen & Thormählen, and when. Pick a name to see everywhere that person has worked.
Listed on Wikidata.1
Jantzen & Thormählen entered the plantation business in 1885, but development was slow, with more interest being shown in railways by investors.
At first, the firm had to depend on imported labor for their tobacco and cocoa operations.
By 1898, Jantzen & Thormählen had their headquarters in Bimbia, in the Victoria District, and lands in Debundscha, Isongo Udje and Mokundange.
The process for acquiring land in the early years was informal. In some cases, the company simply occupied the land and their title was later recognized by the government. Sometimes they paid the local chiefs for the land. In other cases, the government declared an area to be crown land, and sold it to the company.
Eventually, through various mergers, Jantzen & Thormählen created the largest plantation area in West Africa around Mount Cameroon, with 90,000 hectares (220,000 acres) of cocoa, coffee, and later rubber, oil palm and bananas.
Johannes Thormälen considered that it was inconceivable that Cameroon could ever be developed through the work of the natives, thinking they were incapable of the organization required and too lazy. He believed that they had to be forced to work the large plantations by more civilized people.
The population naturally resisted, and the army assisted in hunting for workers,
Those with children were preferred.
It was common for them to be fed poorly, forced to work 18-hour days and whipped if they slacked off.
From Wikipedia’s article on Jantzen & Thormählen, shared under CC BY-SA 4.0.3
The numbers on this page point here. Each one links to the record it came from.