Publicis to buy US digital marketing company Epsilon, which collects consumer data like payments, location, and web activity, for a net purchase price of $3.95B (Angelina Rascouet/Bloomberg)

Angelina Rascouet / Bloomberg:
Publicis to buy US digital marketing company Epsilon, which collects consumer data like payments, location, and web activity, for a net purchase price of $3.95B  —  - Ad group makes biggest purchase yet in consumer-data bet  — Traditional marketing firms are fighting new rivals online