Allison Transmission Holdings has purchased Vantage Power and AxleTech's electric vehicle (EV) systems division.
Allison said both acquisitions align with its "leading innovator position in propulsion technology" and would "complement existing capabilities to advance electrification adoption in commercial vehicles".
Vantage Power is a London-based technology company specialising in developing electrified propulsion and connected vehicle technology for medium- and heavy-duty vehicle makers and their suppliers. It focuses on battery technology development, vehicle integration and control systems, plus vehicle connectivity and telemetry.
Its technology has been used in applications including complete electric hybrid repower systems for buses and grid energy storage.
David Graziosi, president and CEO of Allison Transmission, said: "Through this and other growth initiatives, we will continue to build upon our conventional and electric hybrid products today while differentiating ourselves in the electrification and fuel cell markets."
AxleTech designs and makes axles and integrated electrified axles for on- and off-highway heavy duty commercial vehicles.
It employs 800 worldwide to develop powertrain systems, axles, components and aftermarket parts. The EV systems division is located at company headquarters in Troy, Michigan.