This company FemCare made a press release to clarify that there is no talks about acquisition with Dabur and then within 30 days the company is acquired.
7 months ago Dabur did exactly the same thing. Read this article by livemint
Why do indian corporates lack professional integrity? It is not that the company wanted to keep the acquisition news under wraps. Otherwise how can one explain that during recessionary times, why would stock of a little known scrip increase from its traditional price band of 250-300 to 650+ within a month. A lot of people did knew that Dabur was interested in paying 800 per share to acquire 90% stake in the company (70% from promoters and 20% via open offer)