Marketing company WPP has co-launched Polestar, a China-based start-up that will help companies manager their e-commerce activities in China.

The corporate-backed fund has had a busy week, as it provided early-stage funding, while also existing through a buyback and an acquisition.

Instaclustr has raised $2m in its first seed round.

The memory and brain game developer has announced a $1.3m seed round raised in March from investors including the founders of Zalando, Fyber and Wimdu.

The contract manufacturer has invested the money in online authentification company AirSig in return for a 10% stake.