Ceramic Industry

Ceradyne to Release 2006 Financial Results (2/20/07)

February 20, 2007

Ceradyne, Inc. will release financial results for its 2006 fourth quarter and year ended December 31, 2006, before the market open on February 26, 2007. Management will also conduct a conference call to review the company’s financial results. Any investor or interested individual can listen to the teleconference, which is scheduled to begin at 8 a.m. PST (11 a.m. EST) on February 26. To participate in the teleconference, call (877) 717-3046 or (706) 634-6364 (for international callers) approximately 10 minutes prior to the start time.

The teleconference will also be available live via the Internet at www.ceradyne.com or www.earnings.com. For those unable to attend, these websites will host an archive of the call. A telephone playback will be available beginning at 11:30 a.m. PST on February 26 through 9 p.m. PST on February 28, 2007. The playback can be accessed by calling (800) 642-1687 or (706) 645-9291 (for international callers) and providing conference ID 9128286.