State-backed technology company Tsinghua Unigroup International has bought a 3 percent stake in Imagination Technologies Group Plc, the UK chip designer.

The deal was revealed in a regulatory filing by Imagination Technologies on Monday.

Tsinghua Unigroup has spent more than $9.4 billion making acquisitions and investments in China and abroad since 2014. Last month it said it had taken a roughly 6 percent stake in US-based Lattice Semiconductor Corp.