New York-based ad targeting tech specialist AppNexus has closed a $31m investment round, including $10m from Rupert Murdoch’s media group News Corp, which will now have access to AppNexus’ full suite of technology products.The firm’s software helps publishers maximize yield; and marketers and agencies harness data and machine learning to deliver intelligent and customized campaigns. It includes the Yieldex Analytics solution, which helps publishers manage, forecast, package and price their digital inventory to improve yield and maximize revenue across all delivery channels.