Prism Business Media agrees to buy Penton for $530 million BtoB Magazine, NY - ... banker Bruce Wasserstein in the b-to-b media arena, Penton Media announced Thursday that it has agreed to be acquired by Prism Business Media for $530 million. ...

Springer Science & Business Media launches bid for Informa Guardian Unlimited, UK - The London-based publishing and conferences group confirmed today it had received an approach from the German company, which is owned by private equity ...

VNU puts Business Media Europe group in play BtoB Magazine, NY - ... was purchased by a group of private equity firms earlier this year, said Monday that it is exploring strategic alternatives for its Business Media Europe group ...