CLEVELAND, Jan. 2 /PRNewswire-FirstCall/ -- OM Group, Inc. today announced that it has completed its previously announced acquisition of the electronics businesses from Rockwood Holdings, Inc. for approximately $315 million in cash, plus customary post closing adjustments.

PRINCETON, N.J., May 10 /PRNewswire-FirstCall/ -- AT&T Inc. today announced the signing of contracts for hosting and Internet Protocol Telephony (IPT) with Rockwood Holdings, Inc., a global family of specialty chemicals and advanced materials businesses.

PHILADELPHIA and PRINCETON, N.J., Jan. 4 /PRNewswire-FirstCall/ -- Rohm and Haas Company and Chemical Specialties, Inc.

PHILADELPHIA and PRINCETON, N.J., Nov. 10 /PRNewswire-FirstCall/ -- Rohm and Haas Company and Chemical Specialties, Inc. (CSI), a wholly owned subsidiary of Rockwood Holdings, Inc., announced that the companies have signed an agreement to form a joint venture to serve the wood treatment industry.

PHILADELPHIA and PRINCETON, N.J., Oct. 12 /PRNewswire-FirstCall/ -- Rohm and Haas Company and Chemical Specialties, Inc.