Google revealed private profile data of at least 500 000 users may have been exposed to hundreds of external developers.
In its first restructuring in six years, the company will consolidate three content business units and create a new group for cloud and smart industries.
About 50 million Facebook accounts may have been affected by a new security breach.
Comcast topped 21st Century Fox in a weekend auction for Sky, winning the British broadcaster with a $38.8 billion bid.
This is the company's second major acquisition as it deepens its push into semiconductors for self-driving cars.
Alibaba's co-founder and executive chairman intends to pursue philanthropic endeavours in education.
The company buys Akonia Holographics, a six-year-old maker of displays for augmented reality glasses.
The company bought hardware engineering firm Mindtribe and smart embedded software company Pillar Technology.
CC Capital, Cannae Holdings and funds affiliated with Thomas H Lee Partners acquired the data and analytics company for $5.3 billion.
ARM Holdings, Cisco, HP, Mimecast and Nutanix all made acquisitions during a busy week.
Failure to secure approval of its purchase of NXP in China makes the deal one of the most prominent victims of spiralling US-China trade tension.
The $5.06 billion fine imposed by the European Union could loosen Google's grip on mobile phones, its biggest growth engine.