Facebook has paid an undisclosed amount to buy Source3, an intellectual property management startup that had raised $4m from investors including Autodesk.

Living Pharma, an immunotherapy developer, has been acquired just 18 months after being spun out from University of Maryland.

Change.org has paid an undisclosed sum to acquire Versa, a media commentary platform that had raised $2m from backers including Qualcomm Ventures.

BGU spinout Neuroderm, which is developing clinical-stage pumps containing medicine for Parkinson’s, has been bought by Mitsubishi Tanabe Pharma for $1.1bn.

E-commerce keyboard app developer Chatter Commerce has been acquired by Viber, having raised $1.25m in a round led by parent company Rakuten.

E-commerce firm Infibeam has reportedly bid $700m for corporate-backed Snapdeal, which looked likely to be bought by Flipkart, in a deal that would allow its founders to stay.

Innoetics, a text-to-speech developer based on research at Athena, has been acquired by Samsung in the highest value exit of a Greek spinout in decades.

Permira has become a strategic investor in Visa-backed payment services provider Klarna in a secondary transaction reportedly valued between $225m and $250m.

IP Group has upped its bid for Touchstone to $640m and gained the approval of Imperial College London, making a takeover more likely.

IP Group has participated in a $1.7m funding round for Eight19, a solar panel technology spinout of the Cambridge-backed Advanced Photovoltaic Research Accelerator.