Google might be the biggest name chasing self-driving cars, but a host of automakers, auto brands and other tech heavyweights are also investing heavily in driverless R&D, writes investment specialist Anand Sanwal.

In the wake of GM’s $1B acquisition of self-driving car startup Cruise Automation, there has been a flurry of venture activity in self-driving tech startups. Comma.ai, nuTonomy, and Nauto are just some of the VC-backed companies in auto tech that have received funding or announced major milestones in recent weeks.

As interest builds in self-driving cars, major corporations are not sitting idly by on the sidelines. Using CB Insights’ investment, acquisition, and partnership data, we identified 30 corporate groups involved in the driverless car space. They are a diverse group of players, ranging from automotive industry stalwarts to leading technology brands.

The list is organized alphabetically (companies working on industrial autonomous vehicles were not included in this analysis). Some of the automotive brands below listed are part of the same parent organization, but are detailed separately as they are pursuing their autonomous vehicle ambitions independently or semi-independently. This brief was originally published on September 25, 2015 with 25 select corporations. As of April 18 it has been expanded to 30 select corporations and updated to reflect recent developments.