Buildings material company Holcim has sold its stake in cement company Siam City for $681m.

Backed by the Carlyle Group and Ping An, Meinian will float on the Shenzhen Stock Exchange via a reverse merger with Jiangsu Sanyou Group.

American Express exited the financial planning service after participating in two funding rounds over the last two years.

Seven months after its launch, Google-backed social network Rekindle has been acquired for an undisclosed amount by HubSpot.

Online chat service and internet portal Daum Kakao has acquired the venture firm and plans to turn it into its corporate venturing arm.

Antibody developer XO1, backed by a Johnson & Johnson-backed fund, has been acquired by another Johnson & Johnson subsidiary, Janssen Parmaceuticals.

Hearst and Amazon both exited the revenue management company after it was acquired by AppNexus, which will integrate its technology into its own platform.

Pulmatrix, an inhaled drug developer that had raised $65m in venture funding, will be acquired by publicly-listed Ruthigen in an all-share deal.

Salesforce-backed internet of things company 2lemetry has been bought by online retailer Amazon for an undisclosed sum.

Novartis and Johnson & Johnson-backed Catalyst has signed an agreement to form a newly merged company with Targacept, and will retain a majority stake of 65%.