The story
Geosoft was founded in Toronto in 1982 as a partnership between Ian MacLeod and Colin Reeves to develop geophysical software for geophysical exploration and geotechnical engineering applications. The interests of the partnership and the trademark "Geosoft" were purchased by Paterson, Grant and Watson Ltd. in 1984, who continued to develop Geosoft branded software for geophysical applications.
The software interests of Paterson, Grant and Watson were spun off to form Geosoft Incorporated on February 1, 1986.
In July, 2007, Geosoft acquired the software rights to the potential-field modelling program GM-SYS from Corvallis, Oregon company Northwest Geophysical Associates
. As part of the acquisition the research company Geosoft (USA) Research Inc. was established in Corvallis, Oregon to employ the GM-SYS development team and continue development of GM-SYS and related technologies.
In December 2018, Geosoft was acquired by Seequent
From Wikipedia’s article on Geosoft, shared under CC BY-SA 4.0.3